Water uptake, priming, drying and storage effects inCassia excelsa Schrad seeds
Braz. j. biol
; 63(1): 61-68, Feb. 2003. graf
Article
in English
| LILACS
| ID: lil-343395
Responsible library:
BR1.1
ABSTRACT
The aims of this study were to evaluate the effects of osmotic potential on the water uptake curvein 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 20C. 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 solutions at -0.2, -0.4, and -0.6 MPa for 48, 72, 96, and 168 hours at 20C, followed by air drying and storage for 15 days at 5C. The lower the osmotic potential, the higher the time required for priming. The osmoconditioning yields benefits with PEG solutions at 0.0 and -0.2 MPa; seed improvements were maintained during storage for 15 days at 5C, but were reverted by seed drying
Full text:
Available
Collection:
International databases
Database:
LILACS
Main subject:
Osmosis
/
Seeds
/
Water
/
Cassia
/
Germination
Language:
English
Journal:
Braz. j. biol
Journal subject:
Biology
Year:
2003
Document type:
Article
Affiliation country:
Brazil
Institution/Affiliation country:
Universidade Federal de São Carlos/BR
/
Universidade de Campinas/BR