大豆抗旱性和抗光氧化特性相互关系的研究

The relationship between tolerance drought and tolerance photooxidation in soybean [ Glycine max (L.) merrill ]

采用地理来源不同的５０份大豆种质资源，利用人工控水法研究了它们的抗旱性。将上述材料的离体叶片在夏季放入水中，在晴天日照形成的光氧化逆境下处理４ｄ后，根据供试材料光合色素的衰退情况，决定各品种的抗光氧化级别。将大豆的抗旱性和抗光氧化特性进行相关分析，两者的相关系数为ｒ＝０．８３６６＊＊。初步结果说明大豆的抗光氧化性和抗旱性有着较高的相关性。

soybean germplasm were studied for identification the ability of tolerance drought and tolerance photooxidation, for former, soybean was plantted under the environment of water manpower controlled through the pot cultured technique, and for later, excised soybean leaves were submerged in the water, in which CO 2 being low (5μmol/l),O 2 being low (350μmol/l) and irradiated overhead with strong light at 30～35℃. The grade was determined according to the declining rate of chlorophyll. The correlation coefficient between tolerance drought and tolerance photooxidation was calculated r=0.8366 ** . This results showed that there was a significant positive correlation between the tolerance drought and tolerance photooxidation. So we suggested that, the detecting technique for photooxidation may be used as a reference method for identification the ability of tolerance drought in soybean.