Abstract:
Pinus roxburghii seeds stratified for 0 and 15 days contained very little of growth promoting substances. Similarly unstratified seeds of P. wallichi and those stratified upto a period of 21 days contained very little growth promoting activity. However, seeds of both the species contained a relatively high concentration of the inhibitory substance under the above mentioned conditions. With further progress in the stratification period, there was a decrease in the level of the inhibitor and increase in that of promoting substances. Germinating seeds contained that highest level of the promoting and a negligible amount of the inhibiting substance. Four growth promoting, viz. P1-P4and one inhibitory, 11, substances were detected. Negligible changes in the level of endogenous growth regulatory substances were observed in warm stratified seeds of both the species as compared to the unstratified controls.
Page(s):
309-321
DOI:
DOI not available
Published:
Journal: Biologia, Volume: 31, Issue: 2, Year: 1985