干旱胁迫对野生及栽培大豆幼苗生理特性及抗氧化酶活性的影响

采用盆栽试验，研究了干旱胁迫对野生及栽培大豆生理特性及抗氧化酶活性的影响。即用相对含水量分别为80%、70%、60%、50%、40%、30%的土壤分别栽种野生大豆和栽培大豆，测定其根系活力、细胞膜透性、超氧化物歧化酶（SOD）活性、过氧化氢酶(CAT)活性、过氧化物酶(POD)活性及丙二醛（MDA）含量。结果表明：在同样的土壤相对含水量以及干旱胁迫程度下，相对于栽培大豆，野生大豆表现出高根系活力和抗氧化酶活性以及低细胞膜透性和丙二醛含量。由此可以说明野生大豆的抗干旱能力高于栽培大豆。

Effect of drought on physiological traits and antioxidase activities of soybean (Glycine max) and its wild progenitor (Glycine soja)

This paper reports the effect of drought on physiological traits and antioxidant enzymes activity of wild and cultivated soybean. Root vigor, cell membrane permeability, superoxide dismutase (SOD) activity, catalase (CAT) activity, peroxide (POD) activity, and malondialdehyde (MDA) content were measured for soybeans planted in soil with relative water contents of 80%, 70%, 60%,50%, 40%, and 30%. The results indicated that wild soybean had advantages of physiological changes over the cultivated soybean, in particular in terms of the root vigor, antioxidant enzymes activity, and cell membrane permeability and MDA content, suggesting that wild soybean is more tolerant to drought stres s than the cultivated soybean.