冷冻胁迫对狭叶四照花苗丙二醛等生理特性的影响  

Effects of Freezing Stress on MDA Content and Some Physiological Characteristics in 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：《湖北民族学院学报（自然科学版）》2007年第2期192-194,共3页Journal of Hubei Minzu University(Natural Science Edition)

基　　金：湖北省教育厅重点项目资助(2002008008)

摘　　要：以-2℃为对照分别对二年生狭叶四照花苗在-8℃、-15℃进行24 h、48 h和72 h处理,测定其可溶性糖、丙二醛(MDA)含量和过氧化物酶(POD)活性.结果表明:在-8℃48 h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、MDA含量和POD活性在各处理下均有升高,MDA在-15℃48 h最高.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, POD activity were determined. Results showed that under the condition of -8℃ for the duration of 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, MDA and POD activity had rose after each treatments,MDA contents reached the tiptop at - 15℃ for the duration 48 hours. Dend robenthamia angustata had some cold -resistance ability.

关 键 词：狭叶四照花 冻害 可溶性糖 MDA POD 

分 类 号：S324[农业科学—作物遗传育种]