不同光温条件及水分胁迫对人参西洋参光合速率的影响

THE EFFECTS OF DIFFERENT TEMPERATURE AND WATER STRESS ON PHOTOSYNTH ETIC RATES OF GINSENG AND AMERICAN GINSENG

采用局部控制生态因素的方法,研究了光温对人参光合的短时交互效应,不同生育时期人参光合反应以及水分胁迫对人参、西洋参光合的影响。结果表明:人参对高光照的潜在适应性高于对高温及缺水的适应性,后二者限制了人参对高光能的利用潜力。气温和光强对人参光合有明显的交互作用。但在一定程度上,西洋参具有较人参耐土壤干旱的生理机制。

Through partially controlling the ecological factors, we have studied mutual effects of light and temperature in short time, the photosynthesis on different growth periods and effects of water stress on photosynthesis of Ginseng aud American Ginseng The results show that the adaptability of Ginseng under high light is stronger than that to high temperature and lack of water, two latters limit the potentiality of using high light of Ginseng, There are obvious mutual effects under certain air temparature and light strength but in some extent, that of American Ginseng is stronger than that of Ginseng.