低温胁迫程度对茄子幼苗生理特性的影响

Effects of cold stress on physiological characteristics of eggplant seedlings

通过5℃和8℃的低温处理,研究了低温对茄子幼苗的生理效应。结果表明,随着温度的下降,茄子叶片内SOD活性增大,在5℃低温下,SOD活性增加得最多;在低温条件下,茄子幼苗叶片内POD活性被激活,经5℃和8℃低温处理后,其体内POD活性分别比对照增加292%和113%,且差异均达到极显著水平;CAT活性随温度下降而呈现先降后升的变化趋势;MDA含量随温度的下降而增加,经5℃和8℃处理后,茄子幼苗体内MDA含量比对照分别增加24.94%和30.22%;脯氨酸和可溶性蛋白质含量也随温度的下降而增加。

Physiological characteristics of eggplant seedlings were researched at 5℃ and 8℃ in order to understand eggplant physiological mechanism under low temperature condition in the present study. The results showed that superoxide dismutase（SOD） activity increased with temperature dropping, which was highest when at 5℃. Peroxidase（POD） activity was greatly boosted. It increased 292% and 113% comparing to control at 5℃ and 8℃ , respectively. The differences were extremely significant; catalase （CAT）activity dropped, then decrease with temperature falling; malondialdehyde （MDA） content increased 24.94% and 30.22% compared to that of control at 5℃ and 8℃, respectively; with temperature falling, contents of proline and soluble protein increased.