Data/hora: 12/06/2024 05:29:32

Biblioteca(s): | Embrapa Semiárido.
Data corrente: | 13/07/2023
Data da última atualização: | 13/07/2023
Autoria: | GOMES, S. E. V.; GOMES, R. A.; DANTAS, B. F.
Afiliação: | SAMARA ELIZABETH VIEIRA GOMES, Universidade do Estado da Bahia, Departamento de Tecnologia e Ciências Sociais, Juazeiro, BA; RAQUEL ARAUJO GOMES, Universidade Estadual de Feira de Santana, Feira de Santana, BA; BARBARA FRANCA DANTAS, CPATSA.
Título: | Climate and seed size of a dry forest species: influence on seed production, physiological quality, and tolerance to abiotic stresses.
Ano de publicação: | 2023
Fonte/Imprenta: | Journal of Seed Science, v. 45, e202345013, 2023.
ISSN: | 2317-1545
DOI: | https://doi.org/10.1590/2317-1545v45264166
Idioma: | Inglês
Conteúdo: | Seed production, quality and germination are likely to be affected by a drastic climate change in semi-arid areas predicted for the end of the century. We evaluated Anadenanthera colubrina var. cebil (Griseb.) Altschu (Fabaceae) seeds of different sizes, populations and harvest years for germination and tolerance to environmental stresses aiming to predict impacts of future climate. Seeds were accessed for germination temperature, salinity and osmotic limits and requirements. Germination of large and small seeds harvested in different populations was evaluated in optimum and stressful temperature, salinity and water deficit. A glasshouse pot assay tested weekly irrigation regimes and seedlings emergence and growth. Optimal temperature for seeds germination was 34.8 oC and limits were 5.6 oC and 50.9 oC. Large and small-sized seeds do not differ in germination, however small seeds are more efficient in stressful conditions. Seedlings can emerge and grow under small weekly irrigation for four months. The predicted increase in temperature will not impair germination, however, the time available for seedling establishment will decrease due to lacking rainfall. The increase in the amount of small-sized seeds produced in drought years is a strategy for coping with harsh environments, rather than a decrease in seed quality.
Palavras-Chave: | Estresse abiotico; Estresse ambiental; Sementes de angico; Soma térmica.
Thesagro: | Germinação; Irrigação; Mudança Climática; Semente.
Thesaurus Nal: | Climate change; Germination; Seeds.
Categoria do assunto: | X Pesquisa, Tecnologia e Engenharia
URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1154933/1/Climate-and-seed-size-of-a-dry-forest-species-influence.2023.pdf
Registro original: | Embrapa Semiárido (CPATSA)
Exemplares: | CPATSA - (60504-1) - UPC - AP - DD -  -  -  - DIS