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Campo DCValorIdioma
dc.creatorVaz, Tatiana A. A.-
dc.creatorDavide, Antonio C.-
dc.creatorRodrigues-Junior, Ailton G.-
dc.creatorNakamura, Adriana T.-
dc.creatorTonetti, Olívia A. O.-
dc.creatorSilva, Edvaldo A. A. da-
dc.date.accessioned2018-08-08T19:24:16Z-
dc.date.available2018-08-08T19:24:16Z-
dc.date.issued2016-03-
dc.identifier.citationVAZ, T. A. A. et al. Swartzia langsdorffii Raddi: morphophysiological traits of a recalcitrant seed dispersed during the dry season. Seed Science Research, [S.l.], v. 26, n. 1, p. 47-56, Mar. 2016.pt_BR
dc.identifier.urihttps://www.cambridge.org/core/journals/seed-science-research/article/swartzia-langsdorffii-raddi-morphophysiological-traits-of-a-recalcitrant-seed-dispersed-during-the-dry-season/CB3F422BF0AF0E413166708C8A64567Ept_BR
dc.identifier.urihttp://repositorio.ufla.br/jspui/handle/1/29923-
dc.description.abstractSwartzia langsdorffii seeds have recalcitrant characteristics. Nonetheless, dispersal begins in the month with the lowest precipitation in the studied region, which could lead to seed death by desiccation. Therefore, the objectives of this study were: (1) to characterize the physiological behaviour of S. langsdorffii seeds related to their desiccation sensitivity/tolerance; and (2) to assess the morphophysiological characteristics that enable the seeds to remain viable after dispersal. Fruits and seeds were subjected to biometric evaluation and the anatomical and ultrastructural features of the seeds were determined. Field assessments were performed to determine the capacity of the seeds to maintain viability and to verify the relation between seed viability, diaspore water content and environmental variables. Seeds of this species were found to be recalcitrant and showed pores distributed throughout the seed coat, and contained a large number of stomata in the hypocotyl–radicle axis epidermis. Moreover, phenolic compounds were found throughout the radicle region. Seeds remained viable in the soil for up to 7 months after dispersal without a significant decrease in water content, despite the low precipitation and soil water content. Radicle protrusion began 5 months after dispersal and coincided with partial fruit decomposition at the beginning of the rainy season. Thus, the possible microclimate created by the pericarp, with the moisture content of the aril and the soil, the presence of the structures in the axis, such as the pores and stomata, the chemical composition and the morphology of S. langsdorffii seeds could favour maintenance of their viability until the beginning of the rainy season.pt_BR
dc.languageen_USpt_BR
dc.publisherCambridge Universitypt_BR
dc.rightsrestrictAccesspt_BR
dc.sourceSeed Science Researchpt_BR
dc.subjectDiasporept_BR
dc.subjectEmbryonic axispt_BR
dc.subjectJacaranda-bananapt_BR
dc.subjectSeed coatpt_BR
dc.subjectStomatapt_BR
dc.subjectSwartzia langsdorffiipt_BR
dc.titleSwartzia langsdorffii Raddi: morphophysiological traits of a recalcitrant seed dispersed during the dry seasonpt_BR
dc.typeArtigopt_BR
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