广西林业科学2018，Vol.47Issue(2)：150-154,5.
2种牛角瓜离体叶片对低温胁迫的生理反应
Physiological Responses to Cold Stress in Detached Leaves of Two Kinds of Calotropis gigantea
摘要
Abstract
The detached leaves of mature plants of Calotropis gigantea and Calotropis procera were treated under different conditions of low temperatures (15℃,10℃,5℃,0℃,-5℃and-10℃) and 20℃(control) . The changes of physiological indexes including chlorophyll content, soluble protein content, malondialdehyde (MDA) content, the activities of superoxide dismutase (SOD) and peroxide dismutase (POD) were studied. Results showed that the chlorophyll content declined gradually with the decrease of stress temperature, and the soluble protein content showed a wave-shaped change of increasing at first and then decreasing and then increasing and then decreasing,and the peak came at-5℃;the content of MDA in-creased at first and then decreased, and the accumulation amount was the largest at the range of 15 ℃ to 5℃;the SOD showed a curve of decreasing at first,then increasing,and then decreasing again,and the change of POD was more complicated,but the activity of two enzymes raised to the highest point at 5℃. It was preliminarily considered that Calotropis gigantea had certain tolerance to low temperature stress,but its toler-ance was relatively poor,and the damage was generally serious at around 5℃.关键词
牛角瓜/低温胁迫/生理特性/抗寒性Key words
Calotropis gigantean/cold stress/physiological characteristics/cold-resistant ability分类
农业科技引用本文复制引用
曾祥艳,李泳成,陈金艳,廖健明,乔梦吉..2种牛角瓜离体叶片对低温胁迫的生理反应[J].广西林业科学,2018,47(2):150-154,5.基金项目
广西科学研究与技术开发计划项目(桂科攻15248003-16) （桂科攻15248003-16）
广西壮族自治区林业厅部门预算项目(牛角瓜生长适应性试验研究) （牛角瓜生长适应性试验研究）
