Studies on the Germination of Seeds of Bupleurum falcatum L. : V. Physiological properties of dormant Bupleurum falcatum seeds(2)

[摘要] This investigation was conducted to make clear the physiological properties of dormant Bupleurum falcatum seeds in respiration, physiological changes of seeds during after-ripening period and after low temperature treatment. The results obtained are as follows; 1. Difference of respiratory quality was studied between undeveloped dormant seeds and five months old nondormant seeds to tests by checking the effect of an un-coupler (2, 4-dinitrophenol) in oxidative phosphorylation scheme. It was clarified that there was no relation between the high oxygen absorption of the dormant seed and energy production. This fact suggested that the high oxygen absorption by dormant seed was not related with respiration. 2. Changes of the RNA content and amylase activity were continuously measured for six months during the storage period. The both values were gradually increased.The highest values were observed at the fifth month. Therefore, the endosperm of Bupleurum falcatum seeds might be physiologically immature at the time shedding, and it might be gradually matured as the after-ripening is progressed during the storage period. 3. Low temperature treatment was applied to find the effect on RNA content and amylase activity. It was observed that after low temperature treatment, the seeds showed no changes as for RNA content but showed higher amylase activity.

[学科分类] 农业科学（综合）