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6. POnTE Project Deliverable 9.1: Practical solution for management and containment of Xylella fastidiosa

Author

Crescenza Dongiovanni, Domenico Bosco, Francesco Porcelli, Vincenzo Cavalieri, Michele Di Carolo, Giulio Fumarola, Daniele Tauro, Giuseppe Altamura, Maria Saponari

Subjects
Xylella fastidiosa, spittlebugs, control
Abstract

This deliverable includes the description of the overall results gathered from the field experiments conducted in the Xylella-demarcated areas of Apulia region (southern Italy) and aiming at reducing the vector populations. The different experimental approaches explored for the control of the vectors can be summarized as follows: Evaluation of the host preference of the immature spittlebugs under the most common ecological conditions of the infected area of the Apulia (i.e. in olive groves under different management). Description of the adult population dynamics in olive groves to identify the best period for the application of control measures against the adults; Testing under field conditions different soil management techniques for the control of spittlebug nymphs in olive groves; Testing under field conditions different formulations for the control of the juveniles and adults; Assess vector-transmission efficiency using resistant and susceptibile olive trees; Development of a lattice model to manage the vector and the infection in olive trees. Combined with the field surveys aimed at addressing the host preference and the population dynamics, search for potential parasitoids (either in eggs or larvae) were also carried out but with poor or inconclusive results. The high density of the spittlebug populations recorded in the area also suggested that no effective “enemies” have been selected throughout the time under natural field conditions, given that this species is indigenous.

Published
2020
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7. Additional file 2: of Jasmonate promotes auxin-induced adventitious rooting in dark-grown Arabidopsis thaliana seedlings and stem thin cell layers by a cross-talk with ethylene signalling and a modulation of xylogenesis

Author

Fattorini, Laura, Hause, Bettina, Gutierrez, Laurent, Veloccia, Angela, Rovere, Federica Della, Piacentini, Diego, Falasca, Giuseppina, and Altamura, Maria

Abstract

Table S1. Primer sequences. List of sequences of the primers used for quantifying ARF6, ARF8, ARF17 expression in Ws (WT) and opr3 TCLs by RT-qPCR. (PDF 62 kb)

Published
2018
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8. Additional file 3: of Jasmonate promotes auxin-induced adventitious rooting in dark-grown Arabidopsis thaliana seedlings and stem thin cell layers by a cross-talk with ethylene signalling and a modulation of xylogenesis

Author

Fattorini, Laura, Hause, Bettina, Gutierrez, Laurent, Veloccia, Angela, Rovere, Federica Della, Piacentini, Diego, Falasca, Giuseppina, and Altamura, Maria

Abstract

Figure S2. Germination of different genotypes (HF-, IBA + Kin-media) and AR density in WT seedlings (HF-medium). (a-b) Percentage of germination of dde2–2, opr3 and coi1–16 mutant seeds, and of their WTs (Col, Ws and Col-gl1, respectively), on a medium without IBA and Kin (HF medium, a) or containing 10 μM IBA and 0.1 μM Kin (IBA + Kin medium, b), either in the absence of MeJA (0 μM MeJA) or in the presence of 0.01 μM or 0.1 μM MeJA. (c) Mean AR density, i.e. mean ARP/AR number per cm of hypocotyl (±SE), of seedlings of three WT genotypes grown under darkness on HF medium, at 22 DAS. a, P

Published
2018
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9. The auxin indole-3-butyric acid controls adventitious rooting in Arabidopsis thaliana thin cell layers by its conversion into indole-3-acetic acid and nitric oxide production

Author

Fattorini, Laura, Veloccia, Angela, DELLA ROVERE, Federica, D'Angeli, Simone, Falasca, Giuseppina, and Altamura, Maria Maddalena

Subjects
"adventitious rooting","Arabidopsis thaliana","indole-3-butyric acid","indole-3-acetic acid","nitric oxide","thin cell layer", "Arabidopsis thaliana", "indole-3-butyric acid", "indole-3-acetic acid", "nitric oxide", "adventitious rooting", "thin cell layer"
Published
2018

11. Dual morphogenic role of 1,3-di(benzo[d]oxazol-5-yl)urea: xylogenesis enhancer or adventitious rooting adjuvant in carob and pine microcuttings

Author

Ricci, Ada, Rolli, Enrico, Brunoni, Federica, Dramis, Lucia, Sacco, Ermanno, Fattorini, Laura, Ruffoni, Barbara, Diaz Sala, Carmen, and Altamura, Maria Maddalena

Subjects
3-di(benzo[d]oxazol-5-yl)urea", "xylogenesis", "carob", "1,3-di(benzo[d]oxazol-5-yl)urea","xylogenesis","adventitious rooting","carob","pine", "1, "pine", "adventitious rooting"
Published
2017

14. IBA induces adventitious rooting in Arabidopsis thaliana thin cell layers by conversion into IAA, involving nitric oxide formation, IAA transport, and IAA biosynthesis

Author

Fattorini, Laura, Veloccia, Angela, DELLA ROVERE, Federica, D'Angeli, Simone, Falasca, Giuseppina, and Altamura, Maria Maddalena

Subjects
"Arabidopsis thaliana", "IBA", "nitric oxide", "Adventitious rooting", "IAA", "Adventitious rooting","thin cell layer","IBA","IAA","nitric oxide","Arabidopsis thaliana", "thin cell layer"
Published
2017

15. Arabidopsis root formation is altered by cadmium and arsenic

Author

Fattorini, Laura, Ronzan, Marilena, Piacentini, Diego, DELLA ROVERE, Federica, Ilaria, Buran, Adriano, Sofo, Altamura, Maria Maddalena, and Falasca, Giuseppina

Subjects
cadmium, arsenic, root, arabidopsis thaliana
Published
2017

17. The rolD oncogene promotes axillary bud and adventitious root meristems in Arabidopsis

Author

Falasca, Giuseppina, Altamura, Maria Maddalena, D'Angeli, Simone, Daniela, Zaghi, Costantino, Paolo, Mauro, Maria Luisa, and Mauro, Ml

Subjects
Physiology, Meristem, Arabidopsis, Flowers, Plant Science, adventitious roots, Plant Roots, chemistry.chemical_compound, Bacterial Proteins, Cytochrome P-450 Enzyme System, Gene Expression Regulation, Plant, Auxin, Axillary bud, axillary buds, Botany, Genetics, Arabidopsis thaliana, chemistry.chemical_classification, Plant Stems, biology, Auxin homeostasis, Reverse Transcriptase Polymerase Chain Reaction, fungi, Lateral root, Gene Expression Regulation, Developmental, food and beverages, post-embryonic meristems, Plants, Genetically Modified, biology.organism_classification, rold, Plant Leaves, Phenotype, chemistry, Cytokinin, Plant Shoots, Rhizobium
Abstract

The expression of the Agrobacterium rhizogenes rolD oncogene induces precocious floral transition and strong flowering potential in tobacco and tomato. Here, we describe specific developmental effects induced by expression of rolD in Arabidopsis. We show that floral transition, as histologically monitored, occurred in rolD- plants earlier than in wild type, and this was coupled with a premature and enhanced formation of vegetative and reproductive axillary bud meristems. Furthermore, CYP79F1/SUPERSHOOT/BUSHY (SPS), a gene that negatively controls shoot branching in Arabidopsis and involved in glucosinolate metabolism and in cytokinin and auxin homeostasis, was down-regulated in rolD plants. The multiplication of post-embryonic meristems was also observed in the root system, with enhanced adventitious root formation. This result was confirmed by thin cell layer response in vitro, both under hormone-free and standard rooting conditions. However, the formation of lateral root meristems was not affected by rolD expression. Our results show that rolD accelerates and enhances specific post-embryonic meristems in Arabidopsis.

Published
2010
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18. Adventitious rooting is enhanced by methyl jasmonate in tobacco thin cell layers

Author

Fattorini, Laura, Falasca, Giuseppina, Claire, Kevers, Rocca, L. M., MAINERO ROCCA, Lucia, Claudia, Zadra, and Altamura, Maria Maddalena

Subjects
Indoles, Agrobacterium, Meristem, Mitosis, indole-3-butyric acid, Cyclopentanes, Plant Science, Acetates, adventitious roots, Plant Roots, chemistry.chemical_compound, Plant Growth Regulators, Gene Expression Regulation, Plant, Xylem, Auxin, Tobacco, Genetics, Oxylipins, Jasmonate, tobacco thin cell layers, Interphase, Cells, Cultured, Plant Proteins, chemistry.chemical_classification, xylogenesis, Methyl jasmonate, biology, Jasmonic acid, biology.organism_classification, Indole-3-butyric acid, Molecular biology, jasmonate, chemistry, Biochemistry, Kinetin, Explant culture
Abstract

Adventitious roots (ARs) are induced by auxins. Jasmonic acid (JA) and methyl jasmonate (MeJA) are also plant growth regulators with many effects on development, but their role on ARs needs investigation. To this aim, we analyzed AR formation in tobacco thin cell layers (TCLs) cultured with 0.01-10 microM MeJA, either under root-inductive conditions, i.e., on medium containing 10 microM indole-3-butyric acid (IBA) and 0.1 microM kinetin, or without hormones. The explants were excised from the cultivars Samsun, Xanthii and Petite Havana, and from genotypes with altered AR-forming ability in response to auxin, namely the non-rooting rac mutant and the over-rooting Agrobacterium rhizogenes rolB transgenic line. Results show that NtRNR1 (G1/S) and Ntcyc29 (G2/M) gene activity, cell proliferation and meristemoid formation were stimulated in hormone-cultured TCLs by submicromolar MeJA concentrations. The meristemoids developed either into ARs and xylogenic nodules, or into xylogenic nodules only (rac TCLs). MeJA-induced meristemoid over-production characterized rolB TCLs. No rooting or xylogenesis occurred under hormone-free conditions, independently of MeJA and genotype. Endogenous JA progressively (days 1-4) increased in hormone-cultured TCLs in the absence of MeJA. JA levels were enhanced by 0.1 microM MeJA, on both days 1 and 4. Endogenous IBA was the only auxin detected, both in the free form and as IBA-glucose. Free IBA increased up to day 2, remaining constant thereafter (day 4). Its level was enhanced by 0.1 microM MeJA only on day 1, while IBA conjugation was not affected by MeJA. Taken together, these results show that an interplay between jasmonates and auxins regulates AR formation and xylogenesis in tobacco TCLs.

Published
2009
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21. Cadmium and arsenic affect adventitious root formation and the definition of the quiescent centre in Arabidopsis thaliana (L.) Heynh plantlets

Author

Fattorini, Laura, Piacentini, Diego, Buran, Ilaria, Zanella, Letizia, DELLA ROVERE, Federica, Ronzan, Marilena, Sanità di Toppi Luigi, Altamura, Maria Maddalena, and Falasca, Giuseppina

Subjects
"adventitious root", "cadmium", "arsenic", "Arabidopsis thaliana", "Arabidopsis thaliana","adventitious root", "cadmium","arsenic", "quiescent centre", "quiescent centre"
Published
2015

24. FAD8, lip and osmotin are cold-acclimation genes in Olea europaea L

Author

D'Angeli, Simone, Matteucci, Maya, Fattorini, Laura, Gismondi, Angelo, Ludovici, Matteo, Canini, Antonella, and Altamura, Maria Maddalena

Subjects
"Olea europaea", "FAD8", "osmotin", "lip" "cold acclimation", "Olea europaea", "lip" "cold acclimation", "osmotin", "FAD8"
Published
2015

36. Potato virus X movement in Nicotiana benthamiana: new details revealed by chimeric coat protein variants

Author

Betti, Camilla, Chiara, Lico, Dario, Maffi, D'Angeli, Simone, Altamura, Maria Maddalena, Eugenio, Benvenuto, Franco, Faoro, and Selene, Baschieri

Subjects
viruses, Movement, fungi, Molecular Sequence Data, food and beverages, Original Articles, Recombinant Proteins, Plant Leaves, Potexvirus, Tobacco, Capsid Proteins, Mutant Proteins, Amino Acid Sequence, Evans Blue
Abstract

Potato virus X coat protein is necessary for both cell‐to‐cell and phloem transfer, but it has not been clarified definitively whether it is needed in both movement phases solely as a component of the assembled particles or also of differently structured ribonucleoprotein complexes. To clarify this issue, we studied the infection progression of a mutant carrying an N‐terminal deletion of the coat protein, which was used to construct chimeric virus particles displaying peptides selectively affecting phloem transfer or cell‐to‐cell movement. Nicotiana benthamiana plants inoculated with expression vectors encoding the wild‐type, mutant and chimeric viral genomes were examined by microscopy techniques. These experiments showed that coat protein–peptide fusions promoting cell‐to‐cell transfer only were not competent for virion assembly, whereas long‐distance movement was possible only for coat proteins compatible with virus particle formation. Moreover, the ability of the assembled PVX to enter and persist into developing xylem elements was revealed here for the first time.

Published
2011

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