Germination of Jacaranda mimosifolia (D. Don - Bignoniaceae) seeds: effects of light, temperature and water stress

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 germi...

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Bibliographic Details
Published inBrazilian archives of biology and technology Vol. 47; no. 5; pp. 785 - 792
Main Authors Socolowski, Fábio, Takaki, Massanori
Format Journal Article
LanguageEnglish
Published Instituto de Tecnologia do Paraná (Tecpar) 01.09.2004
Subjects
Jacaranda mimosifolia
light sensitivity
phytochrome
seed germination
water stress
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Summary: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. 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.
ISSN:1516-8913
1516-8913
1678-4324
DOI:10.1590/S1516-89132004000500014