2003
DOI: 10.1590/s1519-69842003000100008
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Water uptake, priming, drying and storage effects inCassia excelsa Schrad seeds

Abstract: The aims of this study were to evaluate the effects of osmotic potential on the water uptake curve in Cassia excelsa seeds and use the results to analyze the effects of dehydration and storage on primed seed germination. Seeds were imbibed in distillad water and polyethylene glicol (PEG 6000) osmotic solutions at -0.2, -0.4, and -0.6 MPa, at 20ºC. The radicle emergence and seed moisture content were evaluated at 6-hour intervals during 240 hours. Afterwards, seeds were primed in distillad water and PEG 6000 so… Show more

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Cited by 9 publications
(16 citation statements)
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“…In C. excelsa, there was tolerance until -0.8 MPa, with significant reduction from -0.6 MPa on at 27 ºC (Jeller et al, 2003). For F. vulgare seeds, there was a linear reduction of germination and speed, reaching zero at -0.3 MPa (Stefanello et al, 2006).…”
Section: Resultsmentioning
confidence: 96%
See 1 more Smart Citation
“…In C. excelsa, there was tolerance until -0.8 MPa, with significant reduction from -0.6 MPa on at 27 ºC (Jeller et al, 2003). For F. vulgare seeds, there was a linear reduction of germination and speed, reaching zero at -0.3 MPa (Stefanello et al, 2006).…”
Section: Resultsmentioning
confidence: 96%
“…In this context, some studies have been conducted using solutions with different osmotic potentials to moisten the substrate, such as Jeller et al (2003), with Cassia excelsa Schrad. ; Ferraz-Grande & Takaki (2006), with seeds of Caesalpinia peltophoroides Benth.…”
Section: Introductionmentioning
confidence: 99%
“…Em Cassia excelsa, outra espécie com tegumento impermeável, uma pré-embebição durante 48 h após quebra de dormência com ácido sulfúrico não afetou a porcentagem de germinação, porém diminuiu significativamente a velocidade desse processo. Em todos os tratamentos, o dessecamento seguido da embebição reduziu significativamente a germinação e a velocidade do processo, indicando, também, alta sensibilidade da espécie à hidratação e desidratação das sementes (JELLER et al, 2003). Sementes com impermeabilidade de tegumento possuem um mecanismo tipo válvula, que permite a desidratação, porém evita a rehidratação; conforme a umidade relativa do ambiente, essas sementes podem tornar-se cada vez mais secas e, somente quando a dormência for quebrada, reidratar-se (COPELAND e MCDONALD, 1995 …”
Section: Considerações Geraisunclassified
“…(JELLER et al, 2003), Cecropia schreberiana Miq. (SÁNCHEZ et al, 2003), Eucalyptus citriodora Hook., Dalbergia nigra (Vell.)…”
Section: Introductionunclassified
“…Tratamentos pré-germinativos ou pós-colheita têm sido realizados com o objetivo de reduzir e evitar a exposição prolongada das sementes às condições de estresse que podem ocorrer durante a semeadura em áreas degradadas, ocasionando a deterioração prematura em campo (Khan, 1992).…”
Section: Introductionunclassified