土壤水分胁迫对大豆体内酶活性和膜透性的影响

以年降水量差异较大的３个地区的３个在豆品种为试材，比较研究了旱境条件下其体内硝酸还原酶、固氮酶、超氧化物歧化酶、过氧化氢酶、过氧化物酶的活性，以及丙二醛含量和相对电导。结果表明，长期在多雨条件下种植的丹豆８号的抗旱性较弱，而来自降水量中等或少雨地区的辽豆１０号和建平黄豆则相对比较抗旱。大豆品种的抗旱性不能根据某单一生理指标加以评判。

EFFECTS OF DROUGHT TREATMENTS AT DIFFERENT STAGES ON THE ENZYME ACTIVITES AND MEMBRANE PERMEABILITIES IN SOYBEANS

The activities of enzymes such as nitrate reductase (NR ),nitrogenase,superoxide dismutase (SOD), catalase (CAT ) and peroxidase (POD), and the malonadehyde (MDA )contents and the relative conductivities were studied under drought stress treatments at different development stages with three soybean varieties from three different districts with large difference in annual rainfall. The results showed that Dandou No. 8, planted in plentiful rainfall district for a long time had weak resistance to drought,however,Liaodou No. 10and Jianpinghuangdou, from regions with moderate or deficient rainfall, had relatively strong resistance to drought. Soybean drought resistance couldn't be estimated only by one physiological parametet.