干旱胁迫对银杏衰老期叶片生理生化特性的影响  

Effect of Drought Stress on Physiologic and Biochemical Characteristic in Senescence Leaves of Gingko biloba L.

作　　者：刘丹[1] 唐加红[1] 杨玉兰[1] 李稳[1] 崔红云[1] 陈国祥[1] 苑中原[1] 

机构地区：[1]南京师范大学生命科学学院,江苏南京210046

出　　处：《北方园艺》2011年第9期70-73,共4页Northern Horticulture

基　　金：国家自然科学基金资助项目(30771299)

摘　　要：以银杏5 a生盆栽实生苗为材料,通过自然干旱处理,研究干旱对银杏衰老期叶片部分生理指标的影响。结果表明:与对照相比,处理组叶绿素含量下降;电导率和MDA含量上升;SOD和CAT的活力先上升后下降;脯氨酸逐渐积累,可溶性蛋白含量呈现先上升后下降的趋势。说明随着干旱胁迫的加剧,引起了膜脂氧化加剧,加快了银杏叶片的衰老。Gingko(5-year-old pot-cultured seedlings) was selected to measure the changes in some physiological indexes under natural drought stress during natural senescence of its leaves.The results showed that compared with the control,chlorophyll content of treatment group decreased during drought stress,while conductivity and MDA content increased.At the same time,proline content accumulated while soluble protein content first increased and then decreased.Activity of SOD and CAT increased first and then decreased too.The present conclusion was that leaves senescence of Gingko could be inhibited by enhancing lipid peroxidation under drought stress.

关 键 词：银杏 干旱胁迫 叶片衰老 生理指标 

分 类 号：S6[农业科学—园艺学]