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 | Acesso ao texto completo restrito à biblioteca da Embrapa Semiárido. Para informações adicionais entre em contato com cpatsa.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Semiárido. |
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Data corrente: |
06/02/2025 |
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Data da última atualização: |
07/02/2025 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
CASTRO, E. A. de; DANTAS, B. F.; NACEDO, M. V. |
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Afiliação: |
RAPHAELA AGUIAR DE CASTRO, FEDERAL UNIVERSITY OF SERGIPE; BARBARA FRANCA DANTAS, CPATSA; MARCOS VINICIUS MEIADO, FEDERAL UNIVERSITY OF SERGIPE. |
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Título: |
Seed hydration memory in the invasive alien species Leucaena leucocephala (Lam.) de Wit (Fabaceae) in the Caatinga. |
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Ano de publicação: |
2024 |
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Fonte/Imprenta: |
Journal of Arid Environments, v. 224, 105238, Oct. 2024. |
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DOI: |
https://doi.org/10.1016/j.jaridenv.2024.105238 |
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Idioma: |
Inglês |
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Conteúdo: |
Seed hydration memory is an adaptive strategy for plants in semiarid environments where water availability is irregular and unpredictable. Species native to these environments that have memory benefit from discontinuous hydration during their germination process and acquire tolerance to environmental stresses. The guiding question of this study is "does an alien species that invades a semiarid ecosystem also have seed hydration memory and benefit from discontinuous hydration?" To answer this question, we collected seeds of Leucaena leucocephala (Lam.) de Wit, an alien species that invades a Brazilian Tropical Dry Forest. We subjected the seeds to 0, 1, 2 and 3 hydration/dehydration cycles (HD cycles) at three different time intervals and, subsequently, to water, saline and thermal stresses. In addition, we used modeling to define the osmotic and thermal limits for occurrence of L. leucocephala and evaluated whether these limits increase after discontinuous hydration of seeds. The cycles of HD positively influenced the germination of seeds submitted to all stresses evaluated, increasing seed tolerance to treatments of water, saline, and thermal stresses. Discontinuous hydration increased the osmotic limits of salinity and thermal tolerance, although not increasing the osmotic limit of water deficit. Our results show that HD cycles also change the patterns of germinative responses of an invasive species to the environmental stresses of the invaded ecosystem. |
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Palavras-Chave: |
Déficit hídrico; Espécie exótica; Espécie invasora; Estresse ambiental; Estresse hidrico; Hidratação descontínua; Leucena; Tolerância ao estresse. |
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Thesagro: |
Caatinga; Espécie Nativa; Leguminosa Forrageira; Leucaena Leucocephala; Planta Forrageira; Semente. |
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Thesaurus Nal: |
Invasive species; Soil water deficit; Stress tolerance. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 02597naa a2200361 a 4500
001 2172451
005 2025-02-07
008 2024 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1016/j.jaridenv.2024.105238$2DOI
100 1 $aCASTRO, E. A. de
245 $aSeed hydration memory in the invasive alien species Leucaena leucocephala (Lam.) de Wit (Fabaceae) in the Caatinga.$h[electronic resource]
260 $c2024
520 $aSeed hydration memory is an adaptive strategy for plants in semiarid environments where water availability is irregular and unpredictable. Species native to these environments that have memory benefit from discontinuous hydration during their germination process and acquire tolerance to environmental stresses. The guiding question of this study is "does an alien species that invades a semiarid ecosystem also have seed hydration memory and benefit from discontinuous hydration?" To answer this question, we collected seeds of Leucaena leucocephala (Lam.) de Wit, an alien species that invades a Brazilian Tropical Dry Forest. We subjected the seeds to 0, 1, 2 and 3 hydration/dehydration cycles (HD cycles) at three different time intervals and, subsequently, to water, saline and thermal stresses. In addition, we used modeling to define the osmotic and thermal limits for occurrence of L. leucocephala and evaluated whether these limits increase after discontinuous hydration of seeds. The cycles of HD positively influenced the germination of seeds submitted to all stresses evaluated, increasing seed tolerance to treatments of water, saline, and thermal stresses. Discontinuous hydration increased the osmotic limits of salinity and thermal tolerance, although not increasing the osmotic limit of water deficit. Our results show that HD cycles also change the patterns of germinative responses of an invasive species to the environmental stresses of the invaded ecosystem.
650 $aInvasive species
650 $aSoil water deficit
650 $aStress tolerance
650 $aCaatinga
650 $aEspécie Nativa
650 $aLeguminosa Forrageira
650 $aLeucaena Leucocephala
650 $aPlanta Forrageira
650 $aSemente
653 $aDéficit hídrico
653 $aEspécie exótica
653 $aEspécie invasora
653 $aEstresse ambiental
653 $aEstresse hidrico
653 $aHidratação descontínua
653 $aLeucena
653 $aTolerância ao estresse
700 1 $aDANTAS, B. F.
700 1 $aNACEDO, M. V.
773 $tJournal of Arid Environments$gv. 224, 105238, Oct. 2024.
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| 1. |  | GRISKA, P. R.; MICHIMA, L. E. S.; OLIVEIRA, T. M.; FERNANDES, W. R. Influência da altitude sobre parâmetros eletrocardiográficos, obtidos por meio do uso do "Holter" em cavalos de enduro em diferentes níveis de condicionamento físico. Pesquisa Veterinária Brasileira, Brasília, DF, v. 35, supl. 1, p. 10-14, dez. 2015.| Biblioteca(s): Embrapa Unidades Centrais. |
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