Oxidative stress and ABA dynamics modulate dormancy and longevity of stored Caryocar brasiliense (Caryocaraceae) seeds

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dc.creatorValéria de Oliveira Pinto
dc.creatorLeonardo Monteiro Ribeiro
dc.creatorCristina de Paula Santos Martins
dc.creatorMauro Franco Castro Mota
dc.creatorDaiane Souza Dias
dc.creatorFabio Henrique Patez
dc.creatorPaulo Sérgio Nascimento Lopes
dc.date.accessioned2025-08-04T16:44:12Z
dc.date.accessioned2025-09-08T23:18:23Z
dc.date.available2025-08-04T16:44:12Z
dc.date.issued2024-12-24
dc.description.sponsorshipCNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológico
dc.description.sponsorshipCAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
dc.identifier.doihttps://doi.org/10.1007/s00344-024-11592-5
dc.identifier.issn1435-8107
dc.identifier.urihttps://hdl.handle.net/1843/83969
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.rightsAcesso Restrito
dc.subjectPequi
dc.subjectEstresse oxidativo
dc.subjectSementes - Dormência
dc.subjectGerminação
dc.subjectFenologia
dc.titleOxidative stress and ABA dynamics modulate dormancy and longevity of stored Caryocar brasiliense (Caryocaraceae) seeds
dc.typeArtigo de periódico
local.citation.epage3024
local.citation.spage3012
local.citation.volume44
local.description.resumoThe interactions between oxidative stress and ABA dynamics constitute the main mechanisms controlling seed longevity and germination. However, little is known, about this subject in terms of tropical species. We evaluated the relationships between oxidative stress and ABA dynamics, and the dormancy and longevity of Caryocar brasiliense seeds, a fruit tree endemic to the Brazilian Cerrado. Freshly dispersed pyrenes (endocarp-enveloped seeds) were stored at room temperature and monitored for one year for germination, mortality, oxidative stress (H2O2 and MDA concentrations, and SOD, APX, and CAT activities), and ABA dynamics (ABA1, NCED4, NCED9 expression and hormone quantification). Newly dispersed seeds have high water contents, pronounced dormancy (related to the synthesis and accumulation of ABA), and tolerance to deterioration (low levels of oxidative stress). Seed water content becomes reduced and oxidative stress increases after between 40 and 60 days of storage, which lead to reductions in ABA synthesis and accumulation and the relief of dormancy. After this period, limitations of the control of oxidative stress lead to gradual reductions of the synthesis and accumulation of ABA, resulting in seed mortality. Interactions between oxidative stress control and ABA dynamics in C. brasiliense seeds during the second and third months of storage result in optimal seed quality, characterized by high germination rates.
local.publisher.countryBrasil
local.publisher.departmentICA - INSTITUTO DE CIÊNCIAS AGRÁRIAS
local.publisher.initialsUFMG
local.url.externahttps://link.springer.com/article/10.1007/s00344-024-11592-5

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