首页>
中文期刊>
《中国林业科技：英文版》
>Changes in Germination and Physiological Characteristics of Seeds of Robinia pesudoacacia and Pinus tabulaeformis during Artificial Ageing
Changes in Germination and Physiological Characteristics of Seeds of Robinia pesudoacacia and Pinus tabulaeformis during Artificial Ageing
In order to study seed quality changes of main afforestation species under high temperature and high relative humidity, the deterioration mechanism of seeds of Robinia pesudoacacia and Pinus tabulaeformis from arid and semiarid areas of Northern China was elucidated in this study. The seeds were artificially aged for 2 and 6 d at the temperature of 45 oC and the relative humidity (RH) of 50%, 75% and 100% , respectively. The results showed that the germinability decreased and the cell membrane deteriorated with the artificial ageing. The decrease in germinability was well correlated with the decreased activities of dehydrogenase and α-amylase. After 6-day accelerated ageing, the seed germination and the activities of dehydrogenase and α-amylase decreased to a great extent for both species of seeds. The results suggest that seed deterioration during accelerated ageing is closely related to the increase of relative conductivity and the decrease of dehydrogenase and α-amylase activities.
展开▼
