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Copyright of Sabuco Revista de Estudios Albacetenses is the property of Instituto de Estudios Albacetenses 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 Caldasia is the property of Universidad Nacional de Colombia 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.)

Floristic characterization of La Tortuga Island was made using a standard collection and herborization methodology. A total of 67 species of Angiosperms were determined and grouped into 58 genera and 35 families, of which, 16 species represent new records for the flora of this island, while 6 are included in the Red List of the Venezuelan Flora. The families with the highest number of species were Boraginaceae and Malvaceae (6 spp. each), Euphorbiaceae, Fabaceae and Poaceae (5 spp. each) and Cactaceae (4 spp.). Four plant formations were identified: Halophilous Grasslands, Mangroves, Psamophilous Grasslands and Xerophilous Shrubs, as well as a transition zone (ecotone) between the latter two. The Xerophilous Shrubs occupied a greater area and richness (52 species) than the other plant formations. The Flora of the La Tortuga island is analogue to that of other Venezuelan, Caribbean and tropical coastal and insular areas of the world, where species with morphological and/or physiological characteristics that allow them to adapt to saline soils, arid climate and tides action are common. [ABSTRACT FROM AUTHOR]

Copyright of Terra Latinoamericana is the property of Sociedad Mexicana de la Ciencia del Suelo A.C. 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 article offers information on the International Day for the Defense of Mangroves due to the substantial loss of these coastal ecosystems that are highly productive. Topics discussed include shrubs or small trees that grow in saline coastal or brackish waters; salt-tolerant trees, also called halophytes, adapted to life in adverse coastal conditions; great environmental and socioeconomic value of mangroves; and Laguncularia racemosa provide shelter and food for marine fauna.

Tolerance in vitro to different levels of sodium chloride of the strain IMI SD 187 of the nematophagous fungus Pochonia chlamydosporia var. catenulata (Kamyschko ex Barron and Onions) Zare and W. Gams was determined in a trial carried out at the National Center for Agricultural Health (CENSA), Cuba. Levels of sodium chloride (2dS.m-1, 4dS.m-1, 6dS.m-1, 8dS.m-1, 10dS.m-1, 12dS.m-1, 14dS.m-1 and 16dS.m-1) and deionized water (0.3dS.m-1) as the control were used in a completely randomized desing with 5 replications. The relationship between inhibition of germination of chlamydospores and conidia and the different levels of salinity stress were analyzed by linear regression. The chlamydospores were more tolerant to salinity than the conidia, with 50% inhibition of germination at 13dS.m-1 and 12dS.m-1respectively. From the results obtained, further studies must be conducted to determine the effectiveness of P. chlamydosporia var. catenulata as a biological control agent of Meloidogyne spp., in saline soil with the purpose of recommending the integrated use of this fungus in technological packages of agricultural production in agroecosystems with salinity problems. [ABSTRACT FROM AUTHOR]

The present study aimed to perform biochemical studies to search possible indicators for differentiation in the early development stages of rice varieties, in relation to their degree of tolerance to saline stress. Leaf samples of two varieties with different degrees of tolerance to salinity (Pokkali and Amistad-82) and grew up in greenhouses growing in nutrient solutions simulating the salt stress (8 and 12 dS.m-1), were analyzed. At 35 days after planting, it was assessed the activity of the enzyme peroxidase, total protein content, proline and lipid peroxidation. The results showed a differential behavior of the varieties in their degree of tolerance when using the EC 12 dS.m-1 which allows using the activity of the enzyme peroxidase, proline concentration and lipid peroxidation in the discrimination of rice genotypes tolerant to salinity. [ABSTRACT FROM AUTHOR]

Salinization of soils is one of the most alarming facts worldwide, it remarks the necessity of find natural products which omdice the saline stress tolerance on plants. On this paper, the effect of 24 epibrassinolide (EBL), a natural brassinosteroid, on growth, proline level and lipid peroxidation on rice seedlings var. J-104 (susceptible) under stress caused NaCl during seven days, was evaluated. Rice seeds were sowing on distilled water during 24 hours, then were germinated on Petri dishes and 48 hours later, were planted on flasks containing a Gley nodular ferritic hydromorphic soil, whichs were placed on a plastic basket containing Hoagland nutritive solution, to allow the normal growth of plants. At the moment of the appearance of the 3th true live (five to six weeks after planting), the treatment of salinity was imposed with NaCI (100 mmol.L-1) on Hoagland solution during seven days and in this moment leaves were sprinkled with 24 epibrassinolide (0,5; 1 and 2 µmol.L-1). Plants were maintained on Hoagland solution during 14 days to their recovering. At the moment of the salinity treatment application, at the end of the stress period, seven days after beginning of recovering period and at the end of this period, the length and biomass of radical and aereal parts of plants were measured. Proline and malondialdehyde levels were also evaluated, as well as lipid peroxidation at the end of the recovering period. The results showed that the effects of NaCI and EBL on the growth and malondialdehyde level on leaves of seedlings, depends on the temperature during the growing period. The increase of proline levels, caused by the stress due to NaCl after 14 days of recovering, diminished significatively with the application of 1 to 2 µmol.L-1 de EBL on both repetitions. [ABSTRACT FROM AUTHOR]

The objective of this paper is to show an alternative for the coexistence with the salinity problem of irrigation water caused by underground dams. The quality of irrigation water is analyzed by comparing the vegetative growth of Capim Vetiver, Sempre Verde, Cana-de-Açúcar, Capim Elefante cv. Napier and Capim Elefante cv. Mercker, upstream and downstream of the underground dam located in Ibicuitinga, Ceará state in Brazil. The analysis of groundwater samples upstream and downstream of the dam have shown that both have high salinity for irrigation, recommending the use of halophytes crops. The study includes an analysis of variance for height growth variable and the Tukey test was applied. From this test it was verified that among the gramineous plants tested, only the Capim Elefante cv. Mercker was found statistically different. [ABSTRACT FROM AUTHOR]

A vegetal species on great scale appears as an alternative for the essential fatty acid production in human nutrition, for that reason the fatty acid composition receives special importance. Salicornia bigelovii is an halophyte that developed in arid and coastal zones like Sonora state and the peninsula of South Baja California, Mexico. It could be an alternative species in the eatable oil production. The similar fixation of N2 by bacteria associated with roots of Salicornia bigelovii and halophyte are an important nitrogen source available in coastal ecosystems. The inoculation of Klebsiella pneumoniae and Azospirillum halopraeferens was evaluated during the vegetative development of Salicornia bigelovii under field conditions in two genotypes (wild genotype and cultivar SOS-10), having affected positively variable as weight, length of plants, yields of production and biochemical characteristics and contained total of ashes, protein and total lipids in seed produced. Our results suggest that both genotypes of S. bigelovii, under the conditions field used, can be improved with the application of K. pneumoniae and A. halopraeferens, showing a potential utility for agricultural producers of coastal semi-arid zones. [ABSTRACT FROM AUTHOR]