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Effects of Drought on Cell Membrane Phospholipids and Total Fatty Acid in Hawthorn

Qin Ling; Li Shuren and Huang Wanrong(Beijing Agricultural College,Beijng 102206)  
The contents of cell membrane phospholipids and fatty acids were changed by drought.Under slightdrought,pho8phatidyl glycerin (PG)of leaf membrane increased,while under severe water stress,the con-tents of PG and phosphatidyl inositol(PI)decreased,and the phosphatidyl choline(PC)decreased significant-ly in both leaf and stem.The linolenlic acid increased and total saturated fatty acids decreased when slightdrought occurred.Unsaturated fatty acids of leaf changed insignificantly.When hawthorn was subjected tosevere drought,the linoleic acid and total unsaturated fatty acids in stem cell membrane decreased remark-ably.The index of unsaturated fatty acid in cell membranes either in leaves or in the stem increased underslight drought,and decreased under severe drought.
【CateGory Index】: S661.501
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