Hydration cycles and overcoming dormancy in Butia capitata (Arecaceae) diaspores

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dc.creatorJéssica Ribeiro Soares
dc.creatorLeonardo Monteiro Ribeiro
dc.creatorMaria Olívia Mercadante Simões
dc.creatorPaulo Sérgio Nascimento Lopes
dc.date.accessioned2023-03-29T14:35:41Z
dc.date.accessioned2025-09-09T00:17:32Z
dc.date.available2023-03-29T14:35:41Z
dc.date.issued2021-05-22
dc.description.sponsorshipCNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológico
dc.description.sponsorshipFAPEMIG - Fundação de Amparo à Pesquisa do Estado de Minas Gerais
dc.description.sponsorshipOutra Agência
dc.identifier.doihttps://doi.org/10.1007/s00468-021-02132-9
dc.identifier.issn1432-2285
dc.identifier.urihttps://hdl.handle.net/1843/51320
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofTrees
dc.rightsAcesso Restrito
dc.subjectSementes - Dormência
dc.subjectButiá
dc.subjectBancos de sementes
dc.subjectGerminação
dc.titleHydration cycles and overcoming dormancy in Butia capitata (Arecaceae) diaspores
dc.typeArtigo de periódico
local.citation.epage1524
local.citation.spage1511
local.citation.volume35
local.description.resumoDormant seeds can spend many years in soil seed banks while subject to successive hydration and dehydration cycles (HC). Our knowledge concerning the effects of HC on seed survival and on overcoming dormancy is still limited, especially among tropical species. We sought to evaluate structural and physiological aspects of the diaspores (pyrenes: seeds enclosed by the endocarp) of the neotropical palm Butia capitata submitted to HC (in association with thermal regimes) under laboratory conditions and in a simulated soil seed bank. Biometric, anatomical, histochemical, biomechanical (the resistance of restrictive structures to embryo growth), and physiological (viability, the potential for in vitro embryo elongation, germination, and endo-β-mannanase activity) evaluations were performed. HC, in association with thermal regime variations, positively affect the growth potential of the embryos, which is related to an increase in their water absorption capacity, increased cell division, embryo expansion, and endosperm reserve mobilization. Those changes result in a gradual decrease in dormancy intensity, allowing a gradual exit from the soil seed bank through germination. Diaspores of B. capitata present morphophysiological dormancy of a particular type that is characterized by restricted embryo growth inside the seed before germination, low levels of endosperm reserve mobilization, and the gradual overcoming of dormancy over several years. The ability to form soil seed banks is an important adaptive strategy when faced with a seasonal environment with irregular rainfall in which the species occurs.
local.publisher.countryBrasil
local.publisher.departmentICA - INSTITUTO DE CIÊNCIAS AGRÁRIAS
local.publisher.initialsUFMG
local.url.externahttps://link.springer.com/article/10.1007/s00468-021-02132-9

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