低温胁迫对狭叶四照花苗木的生理影响  

The Effects of Low Temperature Stress on Physiological Characteristics of Dendrobenthamia angustata

作　　者：彭诚[1] 易咏梅[1] 

机构地区：[1]湖北民族学院生物科学与技术学院,湖北恩施445000

出　　处：《湖北农业科学》2007年第5期777-778,共2页Hubei Agricultural Sciences

基　　金：湖北省教育厅重点项目(2002008008)

摘　　要：以-2℃为对照分别对二年生狭叶四照花苗在-8℃、-15℃条件下进行24 h、48 h和72 h的低温处理,测定其可溶性糖、脯氨酸和丙二醛(MDA)的含量。结果表明,在-8℃48h处理下植株轻微冻害,在-8℃72 h、-15℃48 h、-15℃72 h处理下植株大部分或全部冻死。可溶性糖、脯氨酸和MDA含量在各处理下均有升高,MDA在-15℃48 h最高,脯氨酸在-8℃72 h最高;说明狭叶四照花具有一定的抗寒能力。The freezing effects on Dendrobenthamia angustata two-year-old seedling at different low temperature and different time were observed. At the same time, the contents of soluble sugar and MDA were determined. The results showed that under the condition of -8% for 48 hours, the Dendrobenthamia angustata two-year old seedling encountered slight freezing; the great majority of the seedlings withered owing to freezing at -8% for the duration 72 hours and at -15% for 48 or 72 hours. The contents of soluble sugar and MDA increased after treatment, MDA contents reached to the tiptop at -15% after for the duration of 48 hours. Dendrobenthamia angustata had some cold-resistance ability.

关 键 词：狭叶四照花 冻害 可溶性糖 脯氨酸 MDA 

分 类 号：S687[农业科学—观赏园艺] Q945.78[农业科学—园艺学]