Título:	Climate and seed size of a dry forest species: influence on seed production, physiological quality, and tolerance to abiotic stresses.
Autor:	GOMES, S. E. V. GOMES, R. A. DANTAS, B. F.
Afiliación:	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.
Año:	2023
Referencia:	Journal of Seed Science, v. 45, e202345013, 2023.
Descripción:	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.
Thesagro:	Mudança Climática Semente Germinação Irrigação
NAL Thesaurus:	Climate change Seeds Germination
Palabras clave:	Estresse ambiental Estresse abiotico Sementes de angico Soma térmica
ISSN:	2317-1545
DOI:	https://doi.org/10.1590/2317-1545v45264166
Tipo de Material:	Artigo de periódico
Acceso:	openAccess
Aparece en las colecciones:	Artigo em periódico indexado (CPATSA)