Search

Copyright of GeSec: Revista de Gestao e Secretariado is the property of Sindicato das Secretarias e Secretarios do Estado de Sao Paulo (SINSESP) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

To improve the production of yerba mate seedlings by increasing rooting rates, clonal propagation is used, especially the mini-cutting technique, which aims to increase genetic gains and production efficiency. Thus, the objective was to evaluate the influence of different sizes of mini-cuttings and successive collections on the rooting and root vigor of Ilex paraguariensis. Four successive collections were carried out and mini-cuttings measuring 4, 6, 8 and 10 cm (± 0.2) in length were made, which were staked in 110 cm3 tubes and kept in a climate-controlled greenhouse for 45 days. Rooting percentage, number of mini-cutting roots-1, average length of the three largest mini-cutting roots-1, callus, mortality, survival, and maintenance of original leaves were considered. Rooting was influenced by the size of the mini-cuttings, with mini-cuttings of 8 cm and 10 cm showing greater vigor. The good adaptation of the mini-stumps tends to favor the rooting of the mini-cuttings throughout the collections, showing the potential of the mini-cutting technique for the vegetative influence of Ilex paraguariensis. [ABSTRACT FROM AUTHOR]

The cutting down of forests has caused the densities of C. guianensis to have decreased significantly in the Colombian Pacific. For this reason, the rooting of its cuttings was evaluated in response to the type of planting and the development phase. Cuttings were collected from branches with herbaceous, semi-woody and woody development phases. The harvested cuttings were immersed in ascorbic acid and preserved in moistened newspaper. Sowing was carried out in six germination beds; three using a substrate and three outdoors. The rooting substance was hormonegro 1 (0.05 g/stake). A randomized factorial design was used, composed of three factors (rooting hormone, planting site and cutting development phase). Monitoring was carried out every eight days. A rooting rate of 37.5 % was obtained, which was not significantly affected by the type of cutting used (herbaceous = 38.5 %, semi-woody = 32.3 and woody = 41.7%), while the place of Sowing did have an effect on the rooting of the cuttings (organic substrate eras = 27.1% and intemperature soil = 47.9 %). It is concluded that cuttings from woody branches turn out to be the most suitable for the propagation of C. guianensis, because it experienced a better rooting response and survival in the evaluated treatments. [ABSTRACT FROM AUTHOR]

Feijoa sellowiana O. Berg é uma frutífera nativa de grande potencial de cultivo, porém no Brasil existem poucos pomares em escala comercial. Uma das dificuldades à expansão da produção está vinculada a obtenção de mudas clonais pela escassez de protocolos eficientes para a propagação vegetativa. Assim, o presente estudo teve como objetivo avaliar a eficiência do antioxidante polivinilpirrolidona (PVP) na estaquia de F. sellowiana. Para isso foram testadas diferentes concentrações de PVP (0, 2000 e 4000mg L-1) aplicados de forma sistêmica, em imersão e associado à solução de ácido indolbutírico (AIB). A aplicação de 4000mg L-1 de PVP na forma sistêmica resultou nas maiores porcentagens de sobrevivência e brotação (47,1 e 25,0%, respectivamente), bem como foi maximizou a formação de calos (50,0%) aos 90 dias e de raízes (47,5%) aos 120 dias de cultivo. O uso de antioxidante polivinilpirrolidona favorece a propagação vegetativa de F. sellowiana por estaquia, podendo apresentar-se como relevante ferramenta na propagação clonal da espécie.

This study aimed to evaluate and define strategies for the selection of C. trichotoma clones with competence for adventitious rooting and production of high-quality plantlets by mini-cuttings. For adventitious rooting, mini-cuttings were treated with 3,000 mg L-1 of indole butyric acid and grown in 110 cm2 tubes, consisting of equal proportions of the commercial substrate and vermiculite. The percentage of rooting, number of roots, and mini-cuttings rooted per mini-stump were evaluated after 30 days of cultivation in a humid chamber. The rooted mini-cuttings were transferred to a shade house and the survival percentage, stem diameter, height, and number of leaves were evaluated at 120 days. Data were analyzed using the restricted maximum likelihood/best linear unbiased prediction (REML/BLUP) method and Pearson's correlation analysis. The number of rooted mini-cuttings and stem diameter presented the highest repeatability and accuracy values for rooting and plantlet growth, respectively. These traits also presented significant positive correlation estimations with others, indicating the possibility of indirect selection gain. Cordia trichotoma clones can be selected for vegetative propagation, considering the number of rooted mini-cuttings and the stem diameter of the plantlets produced by mini-cutting. Early selection for adventitious rooting and plantlet quality can aid in genetic improvement programs for the development of new cultivars for vegetative propagation via the use of mini-cuttings. [ABSTRACT FROM AUTHOR]

The objective of this work was to evaluate the minicutting as a vegetative propagation technique and the effect of the application of different doses of indolebutyric acid (AIB) on the rooting of minicuttings of Lecythis lanceolata. The treatments consisted of two collections of shoots, at doses of 0, 2,000, 4,000 and 8,000 mg L-1 of IBA, (factorial 2 x 4), with four replications, in a completely randomized design. The seminal mini garden of Lecythis lanceolata has the potential for the supply of minicuttings. However, adventitious rooting is low, regardless of the application of auxin. [ABSTRACT FROM AUTHOR]

The objective of this work was to evaluate the minicutting as a vegetative propagation technique and the effect of the application of different doses of indolebutyric acid (AIB) on the rooting of minicuttings of Lecythis lanceolata. The treatments consisted of two collections of shoots, at doses of 0, 2,000, 4,000 and 8,000 mg L-1 of IBA, (factorial 2 x 4), with four replications, in a completely randomized design. The seminal mini garden of Lecythis lanceolata has the potential for the supply of minicuttings. However, adventitious rooting is low, regardless of the application of auxin. [ABSTRACT FROM AUTHOR]

Copyright of Ciência Florestal (01039954) is the property of Ciencia Florestal and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Nativa is the property of Revista Nativa and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Agricultural Research in the Tropics / Pesquisa Agropecuária Tropical is the property of Pesquisa Agropecuaria Tropical and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

O objetivo deste trabalho foi avaliar a miniestaquia como técnica de propagação vegetativa e o efeito da aplicação de diferentes doses de ácido indolbutírico (AIB) no enraizamento de miniestacas de Lecythis lanceolata. Os tratamentos constituíram-se em duas coletas de brotações, nas doses de 0, 2.000, 4.000 e 8.000 mg L-1 de AIB, (fatorial 2 x 4), com quatro repetições, em delineamento inteiramente casualizado. O minijardim seminal de Lecythis lanceolata apresenta potencial para fornecimento de miniestacas. Não houve influência da aplicação de auxina no enraizamento das miniestacas, sugerindo que a espécie apresenta baixa capacidade de emitir raízes.

Copyright of Ciência Florestal (01039954) is the property of Ciencia Florestal and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Dracaena reflexa Lam. possui potencial ornamental e medicinal e sua propagação ocorre, preferencialmente, por via assexuada. Os indutores naturais podem incrementar o processo de enraizamento de estacas. Objetivou-se avaliar a eficiência de indutores naturais no enraizamento e desenvolvimento de estacas de D. reflexa, com presença ou ausência de folhas. O experimento foi realizado em delineamento inteiramente casualizado, com esquema fatorial 3x2, (água de coco + polpa de banana; extrato de sementes germinadas de feijão ou água de arroz + polpa de batata-doce) e (presença ou ausência de folhas nas estacas), com quatro repetições. A água de coco + polpa de banana proporcionou aumento do número de folhas, número, comprimento e massa seca de raízes; e da massa seca de parte aérea, quando aplicada em estacas com presença de folhas. A aplicação do indutor natural água de coco + polpa de banana proporciona maior enraizamento e desenvolvimento de estacas de Dracaena reflexa.

A estaquia é proposta como método alternativo para a propagação de porta-enxertos de citros, visando a garantia de obtenção de material clonal, especialmente em variedades com baixa taxa poliembriônica, e uma possível redução no período para a obtenção das mudas. O objetivo deste estudo foi avaliar a influência das folhas e da aplicação de ácido indolbutírico (AIB) sobre o enraizamento adventício, fluorescência da clorofila e caracterizar a ontogenia radicular em estacas dos porta-enxertos citrangeiro ‘Fepagro C 13’, e ‘Trifoliata’. Estacas semilenhosas foram coletadas em dezembro de 2018 e submetidas aos tratamentos: presença ou ausência de folhas com aplicação ou não de AIB (4000 mg L-1). Ao longo de 92 dias em casa de vegetação foram avaliados os percentuais de abscisão foliar, mortalidade de estacas, percentual de enraizamento e número de raízes por estaca. Também os dados da fluorescência inicial (Fo), máxima (Fm) e variável (Fv) da clorofila, a eficiência fotoquímica (Fv/Fm) e a razão Fv/Fo foram avaliados. Amostras de tecido da base da estaca foram coletadas para a realização do estudo anatômico. A presença das folhas nas estacas de ‘Fepagro C 13’ e ‘Trifoliata’ é essencial para o enraizamento adventício. O uso de auxina influencia a eficiência fotoquímica nas folhas das estacas. Em estacas de ‘Trifoliata’ as raízes adventícias originam-se a partir do câmbio vascular. .

The success of Ilex paraguariensis cutting can be affected by the population of origin, as well as the genotype and the rooting environment. Therefore, the objective of this search was to test the vegetative propagation of I. paraguariensis cuttings from two populations and their genotypes inserted in two rooting environments. The populations tested were from Três Barras (TB) and Urupema (UR), both from Santa Catarina state, by selecting seven genotypes in each. After collecting and cutting, the populations and genotypes were evenly distributed in two rooting environments, one being a mini tunnel (MT) with irrigation by micro sprinklers and the other in a greenhouse with intermittent nebulization (GWIN) with temperature and humidity control. Survival was considerably low for both populations but with singular results, as TB was better adapted to GWIN (36.5%) and UR to MT (22.6%). The rooting of cuttings varied greatly in all perspectives. The TB population obtained the best rooting results inside GWIN (21.7%), while UR did not achieve 5% of rooting in MT (2.4%) nor in GWIN (3.2%). The genotypes TB6, TB3 and TB1 obtained the best rooting results for TB in GWIN (all above 30.0%), while only UR3 obtained significant results in GWIN (18.8%). These results, mainly regarding survival and rooting, confirm that there is a strong relation involving the origin place of the material, the individuals of a population and the rooting environments. [ABSTRACT FROM AUTHOR]

Selection of stem cuttings is an important step for production of high-quality seedlings by rapid multiplication method. This study aimed to assess the sprouting capacity of cassava stem cuttings of different diameters. Experiments were conducted at five planting seasons (June, July, August, September, and October) under a completely randomized design in a factorial scheme (5 × 2), with ten treatments and 20 replications. Treatments consisted of combinations between planting seasons and stem cuttings with diameters lower (from 15 to 19.99 mm) and higher than 20 mm (from 20 to 25 mm). Each stem cutting was measured regarding length, diameter, and weight. The mean number of days for emergence, percentage of survival, and sprouting index were assessed at each plot. Planting of stem cuttings with diameter between 20 and 25 mm in September was adequate for obtaining cassava cuttings for the rapid multiplication method. [ABSTRACT FROM AUTHOR]

Copyright of Agricultural Research in the Tropics / Pesquisa Agropecuária Tropical is the property of Pesquisa Agropecuaria Tropical and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Native plants such as Melochia pyramidata have been targeted in various scientific studies due to their potential uses. From this perspective, the present study aimed to separately evaluate the effect of different substrates and pot sizes on the production of seedlings of M. pyramidata genotypes propagated by cuttings. The experiment was conducted in a plant nursery at the Center of Agricultural Sciences of the Federal University of Paraíba, Areia, PB, Brazil. The experimental design was completely randomized and arranged in a 3 x 2 factorial design with three substrate types (sand, commercial substrate Plantmax®, and sand + manure) and two genotypes (MP1 and MP2), with five replications. Pot size evaluation used a 2 x 2 factorial design with two pot sizes (V1: 1.8 L and V2: 0.9 L), two genotypes (MP1 and MP2), and four replications. The evaluations began seven days after the cuttings were planted in tubes and continued weekly for two months by evaluating the number of sprouts and leaves. After two months, these seedlings were transplanted to pots and evaluated for the number of sprouts, leaves, fruits, flower buds, leaf width, and leaf length. The data were subjected to analysis of variance and test of means (Tukey) at 5% probability. The cuttings of M. pyramidata developed best in washed sand and in the commercial substrate Plantmax®. The genotypes developed best in 1.8-L pots, showing more leaves, flower buds, and fruits. [ABSTRACT FROM AUTHOR]

No Brasil a pitaia tem assumido status mercadológico relevante, visto a alta demanda da fruta e a reduzida produção nacional. Contudo, a cultura da pitaia carece de estudos técnicos. Dessa forma, o presente trabalho teve por objetivo avaliar o efeito de extrato de algas e do ácido Indolbutírico (AIB) no enraizamento e na brotação de estacas das espécies de pitaia Hylocereus undatus e Hylocereus polyrhizus. Estacas de pitaia foram tratadas com AIB, extrato de algas, combinação de AIB e extrato de algas, e a testemunha. Para H. undatus as melhores respostas de número, volume e massa de raízes foram obtidas em estacas tratadas com o extrato de algas e com a combinação de AIB e extrato de alga. Para H. polyrhizus as melhores respostas para número de brotações, volume e massa de raízes foram obtidas em estacas tratadas com o extrato de algas, com AIB e com a combinação de AIB e extrato de alga. O extrato de algas SprintAlga TS® se mostrou promissor como alternativa ou complemento ao AIB.

The objective is to analyze techniques to form mulberry seedlings with different cutting sizes and forms of fertilization with N-P-K aiming a low production cost and an easy application in field. The experiment was carried out in a screened nursery, with a shading of 34%. The treatments were distributed in randomized blocks (RB) and compared in a 2x4x3 factorial design with five replications and 12 plants per plot. The factorial design consisted of two cutting lengths (10 and 20 cm) distributed in plastic tubes of 70 and 120 mL, four mulberry cultivars (IZ40, IZ10/1, Korin, and IZ3/2), and two types of fertilization: addition of 84 g of Osmocote® for each kilo of substrate, fertigation with aqueous solution containing 84 g of 14-14-14 N-P-K for each kilo of substrate, plus a control treatment (without fertilization). The commercial substrate Basaplant citrus® was used. 90 and 140 days after planting, assessments of percentage of rooting were carried out. At 140 days, shoot length (cm), number of shoots, number of leaves, root length (cm), and shoot and root green and dry matter were evaluated. The data obtained were evaluated using the Sanest software and Tukey test (P<0.05). Cuttings of 20 cm in length in tubes of 120 mL are recommended for the best formation of mulberry seedlings with the application of N-P-K fertilizer through fertigation. The cultivars showed different rooting potentials and shoot development. The best results are for Korin and IZ 10/1. [ABSTRACT FROM AUTHOR]

O objetivo foi avaliar a multiplicação do sabugueiro (Sambucus australis) de acordo com o tipo de estaca e concentração de ácido indolbutírico (AIB) pela técnica de estaquia. O trabalho foi realizado na Unidade de Ensino e Pesquisa Horta de Plantas medicinais, da Universidade Tecnológica Federal do Paraná – Câmpus Dois Vizinhos (PR). O delineamento experimental foi inteiramente casualizado, em esquema fatorial 2 x 5 (tipo de estaca x concentração de AIB), com 4 repetições de 10 estacas por unidade experimental. Os ramos foram preparados em estacas de 8 cm, mantendo-se um par de folhas reduzido a 25% do tamanho original. As estacas foram preparadas de dois tipos de ramos (Herbácea e Semi-lenhosa). Após a base das estacas foram tratadas com solução de AIB, nas concentrações 0, 500, 1000, 1500 e 2000 mg L-1, durante 10 segundos e colocadas em tubetes redondos contendo substrato comercial. Após 60 dias da implantação do experimento foram avaliados o enraizamento das estacas (%), número médio de raízes por estaca, comprimento médio de raiz (cm), número médio de brotações por estaca, comprimento médio das brotações (cm), massa de matéria fresca (MMF) da parte aérea e radicular (g) e massa de matéria seca (MMS) da parte aérea e radicular (g). Das estacas enraizadas 5 foram replantadas em tubetes para avaliar a sobrevivência (%) 30 dias após a avaliação. Para a multiplicação do sabugueiro (Sambucus australis) pela técnica de estaquia não é recomendada a aplicação exógena de auxina, de maneira que as estacas podem ser confeccionadas de material herbáceo e semi-lenhoso.

The pomegranate (Punica granatum L.) presents potential for commercial exploitation as a fruit, ornamental or medicinal plant. However, for its usage in orchards, it is ideal that the seedlings come from vegetative propagation techniques. The aim of this work was to test the usage of indolebutyric acid (IBA) and substrates, at two harvesting times (before and after fruiting) in the cutting propagation of pomegranate. The work was carried out at UTFPR, Campus Dois Vizinhos. The experiments were installed in a randomized block design, in a 4 x 4 factorial scheme (IBA concentration x substrate), with four replications and ten cuttings per experimental unit. IAB was tested at concentrations 0; 1000; 2000 and 3000 mg L-1. The used substrates were Red Latosol, medium textured sand, commercial substrate MecPlant® and a mixture of Red Latosol + sand + commercial (1:1:1, v/v). The cuttings were placed in beds in a screened protected environment, with 50% shading. Irrigation was performed three times a day for 30 min., by a micro sprinkler. After 60 days, rooting (%), cuttings with callus (%), number of primary leaf and root shoots, length of the three largest roots and percentage of dead cuttings were evaluated. Cutting presented itself as a potential technique to be adopted for pomegranate, using sand, with the use of IBA at concentrations between 1600 and 1750 mg L-1. Cuttings must be collected before fruiting. However, rhizogenesis close to 50% was achieved at the time after such phenological stage. [ABSTRACT FROM AUTHOR]

Copyright of Ciência Florestal (01039954) is the property of Ciencia Florestal and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Ruderal plants are important they are used for animal (e.g., beekeeping/pasture) and human food. Many of these plants present multiple reproductive strategies that ensure that they remain in disturbed environments. Therefore, we investigated the sexual reproduction and regeneration by regrowth of the forage ruderal Macroptillium lathyroides in an anthropized area to support management of this species after cutting or grazing and determine its requirements for seed production and conditions for commercial use. We assessed the occurrence of reproduction through regeneration and species dependence on pollinators. M. lathyroides has an axial underground system capable of regrowth but not propagation post-cut. Its flowers last about eight hours and are papilionate, asymmetrical, hermaphrodite, nectariferous, vinaceous and diurnal. They present secondary pollen that is transferred to the trichomes of the style. The species is self- compatible and presents spontaneous self-pollination. The small bee Exomalopsis cf. auropilosa, was the only pollinator since it activated the brush-type pollination mechanism while gathering nectar/pollen. The species depends on seeds to propagate or maintain a seed bank, since all plants do not regrow after cutting. Thus, sexual reproduction is necessary, but pollinators are not since it is not pollinator independent. [ABSTRACT FROM AUTHOR]

A necessidade de aprimoramento das técnicas silviculturais, que podem contribuir para o aumento da produtividade florestal, surge devido a demanda crescente de produtos derivados de madeira. A fertilização mineral é destacada como essencial entre os fatores que influenciam o crescimento inicial das plantas, razão pela qual o conhecimento sobre as exigências nutricionais das espécies florestais se mostra importante. O objetivo deste trabalho foi avaliar o efeito da omissão de micronutrientes sobre parâmetros biométricos em mudas de Acrocarpus fraxinifolius Wight & Arn., (cedro indiano) cultivadas em solução nutritiva. O estudo foi estabelecido em delineamento inteiramente casualizado, com sete tratamentos, quatro repetições e uma planta por vaso. Os tratamentos consistiram na solução completa de nutrientes Hoagland e Arnon e na omissão dos seguintes micronutrientes selecionados: boro (B), cobre (Cu), ferro (Fe), manganês (Mn), molibdênio (Mo) e zinco (Zn). Aos 90 dias após o transplante foram avaliados os seguintes parâmetros biométricos: altura da parte aérea, diâmetro do coleto, massa seca da parte aérea e radicular. Também foi avaliada a sintomatologia visual da deficiência de micronutrientes, bem como o conteúdo e acúmulo de nutrientes na parte aérea das mudas. A deficiência dos micronutrientes na solução nutritiva influenciou negativamente o crescimento das mudas de Acrocarpus fraxinifolius Wight & Arn. Os micronutrientes limitantes do crescimento das mudas de cedro indiano em ordem decrescente foram Fe>Cu>B>Mn>Mo>Zn.

Grande parte da produção de castanha-do-brasil é oriunda do extrativismo em áreas nativas, sendo o sucesso da exploração em sistemas de cultivo altamente dependente de técnicas de propagação vegetativa, para manutenção das características genéticas e encurtamento do período juvenil de genótipos selecionados. Este estudo teve como objetivos determinar a idade ótima de porta-enxertos de castanheira para realização da enxertia por borbulhia em placa, bem como verificar a porcentagem de sobrevivência de enxertos e o crescimento inicial de brotações de diferentes genótipos em Roraima. Para isso foram instalados dois experimentos no delineamento de blocos casualizados, com quatro repetições. Os tratamentos foram arranjados em esquema de parcela subdividida no tempo, sendo genótipos as parcelas e tempos de avaliação as subparcelas. Foram avaliadas variáveis de crescimento dos porta-enxertos e porcentagem de enxertos vivos e variáveis de crescimento das brotações dos enxertos. Os porta-enxertos atingiram porte recomendado para enxertia entre os 26 e 34 meses após o plantio, indicando crescimento mais lento quando comparado com outros locais. Aos 120 dias após a enxertia foram obtidas porcentagens de sobrevivência de enxertos variando de 25% a 100%, dependendo do genótipo do enxerto. A porcentagem média geral de sobrevivência foi superior a 70%. O crescimento (altura, diâmetro e número de brotações laterais) das brotações observado para alguns genótipos é indicativo da adaptação desses às condições de cultivo consideradas. Como a castanheira é uma espécie perene, tanto o crescimento em idades mais avançadas, quanto a futura produtividade e longevidade das plantas deverão ser monitoradas.

Este trabalho objetivou avaliar o efeito de fitorreguladores na calogênese e rizogênese em discos foliares de Eugenia involucrata. Foram testadas, em dois experimentos, combinações de ácido naftalenoacético (ANA) e 6-benzilaminopurina (BAP) e de 2,4-diclorofenoxiacético (2,4-D) e BAP. Aos 45 dias de cultivo todos os tratamentos formaram calos, principalmente naqueles em que foram empregados ANA isolado e, também, combinado com BAP, bem como 2,4-D e BAP (5:5 e 10:10 µM). Apenas ANA isolado (10 µM) induziu rizogênese. Aos 90 dias de cultivo pôde-se perceber melhor o efeito dos fitorreguladores, observando-se que 2,4-D e BAP (5:5 e 10:10 µM) favoreceram a calogênese, enquanto para rizogênese o melhor tratamento foi com 10 µM de ANA. É possível mediar processos de desdiferenciação e rediferenciação celular a partir de discos foliares de Eugenia involucrata.

Copyright of Bioscience Journal is the property of Bioscience Journal and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Bioscience Journal is the property of Bioscience Journal and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The objectives of this research were to evaluate the rooting competence of mini-cuttings throughout the four seasons and to estimate the adventitious rooting time of canjerana clones. A clonal mini-garden was established with 11 clones in a closed hydroponic system. Evaluations were performed throughout the four seasons for the number of mini-cuttings produced per mini-stump, percentage of survival and rooting of mini-cuttings, number of roots, average root length, and number of rooted mini-cuttings per mini-stump. Data were submitted to analysis of variance and means were compared. A rooting curve was estimated for clones 10SM05, 12SMI25, and 12SMI43 that exhibited high competence for adventitious rooting. Our results indicated that canjerana clones can be selected for adventitious rooting competence of minicuttings during different seasons, and that canjerana mini-cuttings should be cultivated for 63 days in a rooting chamber. [ABSTRACT FROM AUTHOR]

This study aims to evaluate the effect of etiolation and the usage of indolbutyric acid (IBA) in the propagation of Olea europaea cv. Maria da Fé minicuttings. The experimental outline is a completely randomized design, with a 2 x 3 bifactorial scheme [minicuttings from plants with and without etiolation and three concentrations of indolbutyric acid (0, 1,000, and 2,000 mg L-1)]. After 110 days, the following has been evaluated: percentage of survival, foliar retention and rooting, number of roots, length of the largest root, root dry matter mass and percentage of unrooted minicuttings with calluses. For the percentage of survival, foliar retention and rooting, number of roots and root dry matter mass, there has only been significance for IBA concentrations, and in general, the IBA 1,000 mg L-1 concentration provided the highest scores. For the length of the largest root and minicuttings with non-rooted callus, there has been interaction between treatments, with the lowest scores for callus formation in the minicuttings with etiolation and without IBA. It can be concluded that the minicutting of Olea europaea cv. Maria da Fé can be carried out without etiolation in the mother plants, using 1,000 mg L-1 of IBA. [ABSTRACT FROM AUTHOR]

Sequoia is a species that provides large volumes of wood, is resistant to decomposition and has seedling production by mini-cutting as a viable alternative. The aim of this work was to evaluate the rooting of minicuttings of different clones of Sequoia sempervirens and subsequent use of different concentrations of IBA in clones with low adventitious rooting. Mini-cuttings of different clones were used, from clonal mini-garden. In the experiment with the growth regulator, different concentrations of IBA (from 0 mg L-1 to 3000 mg L-1) were used. The material was placed to be rooted in a mini-tunnels and evaluate at 90 days. All experiments were installed in a completely randomized design, with a subsequent evaluation of survival (%), mini-cuttings with calluses (%), mini-cuttings rooted (%) and number of roots (only in the experiment with different concentrations of IBA). In the first experiment, the survival of mini-cuttings was high (close to 95%) and rooting showed great variation among the clones (22.8 to 100%). In the second experiment, using clones that previously presented rooting less than 50%, submitted to IBA application, high survival (88.1 to 99.4%) was observed. The clones presented different responses among themselves, but with improve in the rooting using growth regulator. [ABSTRACT FROM AUTHOR]

Drimys brasiliensis, popularly known as cataia or casca-d'anta, is a tree species native to the Atlantic Forest and belonging to the family Winteraceae. Due to its seeds have dormancy due to embryonic immaturity, the present work aimed to evaluate the viability of the mini-cutting technique in D. brasiliensis in different seasons of collection of the propagules. Mini-cuttings from seedlings sprouts previously produced by conventional cutting were collected at six different times (December/2015, February/2016, April/2016, June/2016, August/2016 and October/2016), made 6-8 cm long, with bevel cut at the base and rectum at the apex, keeping two leaves with their area halved. The experiment was carried out in a completely randomized design with 4 replicates and 14 mini-cuttings per experimental unit. The mini-cuttings were planted in tubes with substrate containing vermiculite and carbonized rice husk (1:1) and kept in a heated greenhouse. After 120 days, the percentage of rooted mini-cuttings, number of roots per mini-cuttings, length of the three largest roots by mini-cuttings, percentage of mini-cuttings with callus, live, dead, with shoots and leaves that maintained their original leaves were evaluated. Rooting percentages of mini-cuttings were greater than 75% regardless of the season of the year in which the propagules were collected. The adventitious root formation of D. brasiliensis occurs indirectly, from the callus tissue formed at the base of the mini-cuttings. The minicuttings technique is recommended for the production of seedlings of the species, at any seasons of the year. [ABSTRACT FROM AUTHOR]

Piper umbellatum L. is a Brazilian native species whose medicinal properties confer it with potential for economic exploitation. The study of propagation methods for this species is fundamental to avoid its exploitation from being restricted to extractivism. The objective of the present research was to evaluate the propagation of P. umbellatum by leaf and stem cuttings and the effect of indolebutyric acid (IBA) on their rooting. The experimental design consisted of a 2x3 factorial scheme, with two types of cuttings (leaf and stem) and three IBA treatments (0, 2000, 4000 mg. L-1). Leafless stem cuttings were prepared at a length of 15 cm. Leaf cuttings comprised leaf petiolo and limbo, reduced to a fifth of its original area. After 50 days from planting, in treatment without AIB, leaf cuttings had the greatest rooting percentage (22.5%) when compared to stem cuttings (7.5%). At the concentration of 2000 mg.L-1, there was an increase in rooting percentages for both types of cuttings, with higher rates for leaf cuttings (40%). At the concentration of 4000 mg.L-1, stem cuttings had a better rooting performance, whilst rates of leaf cuttings decreased. On average, leaf cuttings had a greater number and length of roots than stem cuttings. Leaf cuttings demonstrated little developed and small-sized sprouts at all treatments. The use of this type of propagule should be restricted to conditions where there is a limitation in the availability of stem cuttings for the propagation of P. umbellatum. [ABSTRACT FROM AUTHOR]

Copyright of Ciência Florestal (01039954) is the property of Ciencia Florestal and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Este trabalho objetivou avaliar o efeito de fitorreguladores na calogênese e rizogênese em discos foliares de Eugenia involucrata. Foram testadas, em dois experimentos, combinações de ácido naftalenoacético (ANA) e 6-benzilaminopurina (BAP) e de 2,4-diclorofenoxiacético (2,4-D) e BAP. Aos 45 dias de cultivo todos os tratamentos formaram calos, principalmente naqueles em que foram empregados ANA isolado e, também, combinado com BAP, bem como 2,4-D e BAP (5:5 e 10:10 µM). Apenas ANA isolado (10 µM) induziu rizogênese. Aos 90 dias de cultivo pôde-se perceber melhor o efeito dos fitorreguladores, observando-se que 2,4-D e BAP (5:5 e 10:10 µM) favoreceram a calogênese, enquanto para rizogênese o melhor tratamento foi com 10 μM de ANA. É possível mediar processos de desdiferenciação e rediferenciação celular a partir de discos foliares de Eugenia involucrata. This study evaluated the effect of growth regulators on callogenesis and rhizogenesis in Eugenia involucrata. In two experiments, we tested the naphthaleneacetic acid (NAA) and 6-benzylaminopurine (BAP), and 2,4-dichlorophenoxyacetic acid (2,4-D) and BAP associations. After 45 days of culture, all treatments formed calli, however, those treatments with NAA (alone or combined with BAP) and 2,4-D combined with BAP (5:5 and 10:10 µM) presented the best results. Only the use of NAA at 10 µM induced rhizogenesis. At 90 days of culture, the effect of phytoregulators was most evident, where 2,4-D combined with BAP (5:5 and 10:10 µM) were more favorable for callogenesis while 10 μM NAA were more favorable for rhizogenesis. These results indicate that cell dedifferentiation and re-differentiation processes are achievable from leaf explants of Eugenia involucrata. [ABSTRACT FROM AUTHOR]

The objective of the present research was to evaluate the effect of different concentrations of indolebutyric acid (IBA) on the rooting of Luehea divaricata minicuttings under two different cultivation periods in a greenhouse environment. The minicuttings were immersed in a hydroethanolic solution containing IBA. All minicuttings survived after 30 and 60 days of cultivation. Root formation at 30 days of cultivation with 1000 mg L-1 of IBA was 91.7%, the same rate as that observed with 4000 mg L-1. At the 1000 mg L-1 concentration, the number of roots was the greatest among all treatments, with 8.42 roots per minicutting after 30 days of cultivation. After 30 days of cultivation, the formation and number of roots with the use of 1000 mg L-1 of IBA in the "pulse" treatment produced the best outcome results, allowing the plants to spend less time in a greenhouse at a reduced concentration of auxin when compared with other treatments. However, to obtain higher averages of secondary root formation, root length, and number of leaves, it is necessary to increase the cultivation period to 60 days. [ABSTRACT FROM AUTHOR]

Ficus enormis is a native species with great ecological potential, especially for ecosystems restoration. The present study aimed to evaluate the rooting, root and vegetative vigor of Ficus enormis mini-cuttings and to determine its best length for the formation of seedlings. Mini-cuttings were collected from clonal mini-garden, prepared with 2 ± 0.2 cm, 4 ± 0.2 cm, 6 ± 0.2 cm, 8 ± 0.2 cm and 10 ± 0.2 cm of length and diameter of 0.5 ± 0.2 cm. The planting was carried out in plastic boxes filled with commercial substrate based on carbonized rice hulls and coconut fiber, conditioned in a greenhouse. After 45 days, were avaluated the rooting percentage, original leaf maintenance, mini-cuttings with roots and callus percentage, length of the three largest roots/minicutting, shoot emission percentage, number of root/mini-cutting and mortality percentage. The results showed that the mini-cuting length did not influenced the rooting percentage, callus and root formation, and root length mean. However, shoot emission, number of root and mortality were influenced by the mini-cutting length. [ABSTRACT FROM AUTHOR]

Copyright of Revista Caatinga is the property of Revista Caatinga and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Pyrostegia venusta Miers is a brazilian native climbing plant. It is a well-known specie for its medicinal proprieties and its usage as an ornamental plant as well. Although, there's a lack of information about its vegetative propagation. Thus, the main objective of this project was to evaluate the effects of different lengths of stem cuttings and different concentrations of indol-butyric acid (IBA) on root formation of P. venusta stem cuttings. The experiment was conducted at Setor de Ciências Biológicas da Universidade Federal do Paraná, em Curitiba - PR in a green house for 90 days. The basis of semi-hardwood cuttings with 6 and 12 cm length were treated in a water-alcohol solution containing 3 different concentrations of indol-butyric acid (0, 1000 and 2000 mg L-1). The variables analyzed were the percentage of rooted cuttings, alive and dead cuttings, cuttings with callus and sprouted cuttings; average number and length of roots per cutting. In this experiment we can conclude that the rooting percentage, root number per cutting and root length is not influenced by the length of the stake Pyrostegia venusta; and the application of IBA positively affects only the root length of cuttings. [ABSTRACT FROM AUTHOR]

The aim of this study was to evaluate the survival rate, the vegetative development and vertical pullout resistance of Phyllanthus sellowianus, Salix humboldtiana, Gymnanthes schottiana, Cephallanthus glabratus and Ludwigia elegans propagated by live cuttings. The experiment was conducted at the Federal University of Santa Maria, RS. The experiment was installed in October 2015 and evaluated in June 2016. Experiment was conducted in randomized blocks design with use of 5 plant species and 3 replications. In each block were planted 3 live cuttings of each species, with the total of 45 cuttings for the 3 blocks. The space between plants was of 1 x 1 m. Live cuttings average diameter was 1.7 cm and 60 cm long. Were evaluated the survival rate, morphological variables from shoots, as well as the vertical pullout resistance for each species. The observed survival rates were: P. sellowianus (100%), S. humboldtiana (100%), G. schottiana (83%), %), C. glabratus (67%) e L. elegans (50%), which are statistically different among themselves by Chi-square test (χ ²) at 5% level of significance. The variables, length and diameter of shoots, as well as the vertical pullout resistance are statistically different between species by Tukey’s test at 5% level of significance, and the best results were observed for P. sellowianus and less favorable to L. elegans. The results showed that the evaluated species, excluding L. elegans, had from great to good survival rates. The species P. sellowianus and L. elegans had the major and minor soil mechanical reinforcement capacity, respectively. [ABSTRACT FROM AUTHOR]

The general objective of this paper is to evaluate the effect of different IBA concentrations on greenhouse, shade and full sun survival, root vigor and seedling quality in Tectona grandis. To do so, mini-cuttings were prepared containing two pairs of leaves reduced to 25% of their original size (7.0 ± 1.0 cm) in length and bevel cut at the base. They were submitted to five treatments with different concentrations of indolebutyric acid (0, 500, 1000, 1500 e 2000 mg L-1), remaining in greenhouse, house of shade and in full sun for 30, 20 and 15 days, respectively. Survival was evaluated in greenhouse, house of shade and full sun; radicial vigor, height, diameter of the neck, ratio between shoot height and diameter, root dry mass, aerial, and total mass. The experimental design was in randomized blocks, with five replications of 15 plants and five treatments. Data were submitted to the normality test, Bartlett test and polynomial regression of the second degree. As a result, it was verified that the use of IBA did not influence root vigor and survival, however, it provided seedlings with a higher dry mass, being the best the 2000 mg L-1 treatment. [ABSTRACT FROM AUTHOR]

The objective of the present work was to evaluate the rooting potential of blackberry shoots, influenced by indolylbutyric acid. For the test, blackberry shoots of approximately 10 cm in length with different diameters, obtained in the second fortnigh to February 2018 wereused. The experimental design was a randomized block design, with the blackberry saplings were treated with AIB (indolylbutyricacid) atfive concentrations, which correspondto 0, 10, 20, 50 and 100 mg L-1. Each treatment contained four replicates, and each replicate was composed of 20 sprouts of blackberry. At theend of 87 day sof cultivation, shoots were evaluated for percentage of live and rooted shoots, dead and not rooted live, root volume (mm³), specific surface area (mm²), total root length (mm), weighted diameter of roots (mm) and, fresh and dry root pasta (g). It was concluded that there was no effect of indolylbutyric acid concentrations on percentage of viable, non -- viableanddead blackberry shoots for total root lengthand for fresh mass and drymass, and with the increase of IBA concentrations the decrease for the variables of volume, specific surface area and weighted root diameter. [ABSTRACT FROM AUTHOR]

The objective of this study was to evaluate the multiplication of elderberry (Sambucus australis) according to the cutting type and indolbutyric acid concentration (IBA) by cutting technique. The work was carried out at the Horta Teaching and Research Unit of Medicinal Plants, Universidade Tecnológica Federal do Paraná - Câmpus Dois Vizinhos (PR). The experimental design was completely randomized, in a 2 x 5 factorial scheme (stake type x IBA concentration), with 4 replicates of 10 cuttings per experimental unit. The branches were prepared on 8 cm cuttings, keeping a pair of leaves reduced to 25% of the original size. The cuttings were prepared from two types of branches (Herbaceous and Semi-woody). Subsequently the base of the cuttings were treated with IBA solution at the concentrations 0, 500, 1000, 1500 and 2000 mg L-1, for 10 seconds and placed in round tubes containing commercial substrate. Sixty days after the implantation of the experiment were evaluated the rooting of the cuttings, average number of roots per cutting, average length of root, average number of shoots per shoot, average shoot length, fresh shoot and root mass and dry matter of shoot and root. From the rooted cuttings, 5 were chosen randomly from each treatment and were replanted in tubes to evaluate the survival 30 days after the evaluation. For the multiplication of the elderberry (Sambucus australis) by the cutting technique, the exogenous application of IBA is not recommended, so that the cuttings can be made of herbaceous and semi-woody material. [ABSTRACT FROM AUTHOR]

Vegetative propagation is an alternative for the production of mate plantlets; however, there is a lack of information in the literature that addresses the viability of the cultivar Cambona 4 in a mini-hedge system, which stands out in the consumer market due to high productivity and smooth taste of the leaves. Like this, the objective of this work was to evaluate the survival of mini-stumps and production of mini-cuttings of mate (Ilex paraguariensis A. St.-Hil) cultivar Cambona 4 in different collections carried out in seminal mini-hedge system in fiberglass structure. After 60 days of establishment of the mini-hedge, four collection of mini-stumps sprouts were carried out in march, april, june and july 2015, totaling 137 days between the first and last collection. In each collection, the percentage of mini-stumps survival, number and length of shoots (cm) and the productivity of the mini-stumps (number of mini-cuttings with one bud produced by mini-stump) was evaluated. The experiment was conducted in a completely randomized design, containing four treatments (collection times), with 40 replications each. The mini-stumps presented 100% survival during the experimental period. For the variable length of sprouts, it was verified that the collections march, april and july 2015 were statistically higher, as well as presented the highest averages of mini-cuttings production by mini-stumps. The "canaletão" mini hedge system in fiberglass structure is technically feasible, as it allows to obtain high rates of survival of the mini-stumps and productivity of mini-cuttings of mate, cultivar Cambona 4, in collections made in the months of march, april and july. [ABSTRACT FROM AUTHOR]

Copyright of Revista Caatinga is the property of Revista Caatinga and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Arquivos de Ciências Veterinárias e Zoologia da Unipar is the property of Associacao Paranaense de Ensino e Cultura and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Agricultural Research in the Tropics / Pesquisa Agropecuária Tropical is the property of Pesquisa Agropecuaria Tropical and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

RESUMO Para avaliar o efeito da micorriza e do fósforo (P) sobre o amendoim forrageiro (Arachis pintoi Krap. & Greg.), foram estabelecidos dois experimentos em casa de vegetação para comprovar a hipótese de haver benefício da micorrização no crescimento de mudas desta espécie, tanto com propagação por sementes como de forma vegetativa. No experimento I, as mudas foram cultivadas em bandejas com 72 células, preenchidas com solo, em delineamento inteiramente casualizado (DIC) com parcelas subdivididas. Os tratamentos foram constituídos pela inoculação de seis espécies de fungos micorrízicos arbusculares (FMA) nas parcelas e duas formas de propagação nas subparcelas. No experimento II, estolões foram cultivados em vasos contendo solo de baixa fertilidade tratado com cinco doses de P e inoculados com quatro espécies de FMA mais um controle, arranjados em fatorial 5 x 5, em DIC. Em ambos os experimentos, os substratos foram previamente esterilizados. As mudas cultivadas em bandejas de isopor e originadas de sementes produziram mais matéria seca do que aquelas obtidas de forma vegetativa e os FMA foram eficientes em promover o crescimento das mudas. Para as mudas originadas do enraizamento de estolões, o benefício micorrízico foi detectado apenas sobre a massa de raízes. Nas mudas cultivadas em vasos e fertilizadas com P, a magnitude das respostas foi maior mediante inoculação com FMA. A espécie G. clarum foi mais eficiente em condições de baixa disponibilidade de P, enquanto A. morrowiae se destacou nos níveis mais elevados de P. Há indícios de elevada dependência micorrízica do amendoim forrageiro.

RESUMO Experimentos foram conduzidos para avaliar o efeito do meio ácido e do alumínio, assim como para determinar a concentração mais apropriada de ácido indolbutírico (AIB) para o enraizamento de estacas de diferentes genótipos de Camellia sinensis L (planta de chá). Para tal, foram coletados ramos de plantas-matrizes em Pariquera-Açu-SP, Brasil, no inverno de 2012 e preparadas estacas semi-lenhosas, contendo uma gema e uma folha, que foram mantidas em viveiro com 70% de sombreamento. A irrigação do substrato foi feita com água e soluções contendo ácido fosfórico e sulfato de alumínio a pH 5,5, 4,5; 3,5. No primeiro experimento, o delineamento experimental foi o inteiramente casualizado em esquema fatorial 3 x 7, três genótipos (F 15, IAC 259 e Comum) e sete condições diferentes de enraizamento (vermiculita a pH 6,5, vermiculita acidificada com ácido fosfórico a pH 3,5; 4,5 e 5,5 ou vermiculita acidificada com sulfato de alumínio a pH 3,5; 4,5 e 5,5). No segundo experimento, o tratamento que promoveu o maior enraizamento no primeiro experimento (vermiculita acidificada com sulfato de alumínio a pH 3,5) foi combinado ao tratamento com AIB. O delineamento experimental utilizado foi o inteiramente casualizado em esquema fatorial 3 x 6, sendo três genótipos e seis concentrações de AIB (0, 2000, 4000, 6000, 8000 e 1000 mg L-1). A vermiculita acidificada com sulfato de alumínio a pH 3,5, combinada a aplicação de 10000 mg L-1 de AIB por 30 segundos, foi o tratamento mais adequado para o enraizamento de estacas semi-lenhosas dos genótipos F15, IAC 259 e Comum.