EFFECT OF WATER POTENTIAL ON GERMINATION OF SEEDS OF STYLOSANTHES-GUIANENSIS (AUBL) SW

Citation
Mea. Delachiave et al., EFFECT OF WATER POTENTIAL ON GERMINATION OF SEEDS OF STYLOSANTHES-GUIANENSIS (AUBL) SW, Phyton, 56, 1994, pp. 127-132
Citations number
27
Categorie Soggetti
Plant Sciences
Journal title
PhytonACNP
ISSN journal
00319457
Volume
56
Year of publication
1994
Pages
127 - 132
Database
ISI
SICI code
0031-9457(1994)56:<127:EOWPOG>2.0.ZU;2-X
Abstract
Effect of water potential on germination of seeds of Slylosanthes guia nensis (Aubl.) Sw. To evaluate the water potential effect on germinati on of S. guianensis two experiments were performed. The first one used osmotic pre-treatment in the imbibition phase and after this period ( 14 h) the seeds were germinated on filter paper moistened with distill ed water. In the second experiment, besides the imbibition phase, seed s were kept in a range of water potentials during all the process. The potentials ranged from 0 to -18 bars, with 3 bars increments, induced by mannitol or by polyethylene glycol. Each treatment was replicated 3 times with 100 seeds per replication. The seeds pre-treated during i mbibition had high germination percentage, the highest being the ones in polhyetylene glycol. In the second experiment the polyethylene glyc ol solutions reduced dramatically the germination percentage in relati on to mannitol. From -12 bars on germination ceased in the polyethylen e glycol treatments, while in mannitol solution there was 52,67% of ge rmination, in the same water potential.