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研究发现当两种不同的玉米幼苗在 2 8℃干旱下处理 4d后 ,干旱处理的幼苗的存活率比未干旱处理的幼苗低 ,这说明此干旱条件使玉米幼苗受到伤害而降低其存活率 .而且 ,在干旱胁迫过程中 ,干旱处理过的幼苗的谷胱甘肽还原酶活性发生了变化 ,在胁迫初期谷胱甘肽还原酶活性上升 ,而在胁迫后期活性下降 .测定酶液中的蛋白质发现 ,干旱胁迫使蛋白质含量降低 .这些结果表明 ,在干旱初期谷胱甘肽还原酶参与抗旱性的构建 ,后期由于蛋白质的降解而使谷胱甘肽还原酶活性降低
The results showed that when two different maize seedlings were treated for 4 days under the drought at 28 ℃, the survival rate of the treated seedlings was lower than that of the untreated seedlings, which indicated that this drought condition could damage the corn seedlings and reduce their survival rate. Moreover, the glutathione reductase activity of the arid-treated seedlings changed during the drought stress, and the activity of glutathione reductase increased during the early stage of stress, but decreased during the later stage of stress. It was found that drought stress reduced the protein content.These results indicated that glutathione reductase participates in the construction of drought resistance in the early drought period and decreases glutathione reductase activity in the late stage due to the degradation of protein