Germination of Jacaranda mimosifolia (D. Don - Bignoniaceae) seeds: effects of light, temperature and water stress
Carregando...
Data
2004-09-01
Autores
Socolowski, Fábio [UNESP]
Takaki, Massanori [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Brazilian Archives of Biology and Technology
Resumo
Sementes de Jacaranda mimosifolia apresentaram temperaturas mínima e máxima de germinação a 15 e a 40º C, respectivamente. A temperatura ótima foi de 25º C com alta porcentagem e velocidade de germinação. Uma pequena estimulação da germinação pela luz foi observada. Sob condições de estresse de água o efeito promotor da luz foi maior, mas na temperatura ótima este efeito da luz não foi observado. No potencial de água de -0,9MPa praticamente nenhuma semente germinou.
Investigations were carried out to study the effect of light, temperature and water stress on the germination of seeds of Jacaranda mimosifolia which showed the minimum and maximum germination temperature at 15 and 40º C, respectively. The optimum temperature was 25º C with high percentage and germination rate. Slight promotive effect of white light was observed. Under water stress conditions the effect of light was high but at optimum temperature no effect of light was observed. At -0.9MPa few seeds germinated.
Investigations were carried out to study the effect of light, temperature and water stress on the germination of seeds of Jacaranda mimosifolia which showed the minimum and maximum germination temperature at 15 and 40º C, respectively. The optimum temperature was 25º C with high percentage and germination rate. Slight promotive effect of white light was observed. Under water stress conditions the effect of light was high but at optimum temperature no effect of light was observed. At -0.9MPa few seeds germinated.
Descrição
Palavras-chave
Jacaranda mimosifolia, seed germination, phytochrome, water stress, light sensitivity
Como citar
Brazilian Archives of Biology and Technology. Brazilian Archives of Biology and Technology, v. 47, n. 5, p. 785-792, 2004.