不同生育时期干旱胁迫对马铃薯生理生化指标的影响  

Physiological and Biochemical Response of Potato under the Drought Stress in Different Growth Period

作　　者：抗艳红[1] 龚学臣[1] 赵海超[1] 张丽萍 张文聘[1] 田再民[1] 乔海明 

机构地区：[1]河北北方学院农林科技学院,河北张家口075000 [2]张家口市农业局,河北张家口075000 [3]张家口市农业科学院,河北张家口075000

出　　处：《中国农学通报》2011年第15期97-101,共5页Chinese Agricultural Science Bulletin

基　　金：公益性行业(农业)科研项目(3-6);河北省科技项目(07220216);张家口市科技项目(060189;0711036C)

摘　　要：研究不同生育时期干旱胁迫下马铃薯相关生理生化指标的变化,以期探讨干旱胁迫下马铃薯抗旱的生理机制。选取生产上推广的‘冀张薯8号’和‘夏波蒂’2个马铃薯品种,在旱棚内分区栽培。不同生育时期进行干旱处理,测定马铃薯超氧化物歧化酶(SOD)、丙二醛(MDA)、脯氨酸(Pro)的含量变化。结果表明,各生育时期干旱胁迫下,马铃薯MDA、Pro含量均增加,而SOD活性下降。花期干旱胁迫对马铃薯的生理生化指标影响最大;抗性强的品种MDA、脯氨酸含量增加的幅度较小,SOD的活力较高,而抗旱性弱的品种则相反。抗旱性强的品种在生理生化指标上具有抗旱的调节机制。The changes of the physiological and biochemical indices in different growth period under drought stress were researched in this paper to explore the drought-resistant physiological mechanisms of potato.The super oxide dismutase （SOD）,malon dialdehyde （MDA） and Pro of the potato variety ＇Jizhangshu8＇ and ＇Shepody＇,which were extensively planted in production and planted inside different shed-houses under the condition of drought stress,were measured.The results showed that the content of malon dialdehyde （MDA） and Pro increased,but SOD activity declined under drought stress.The effect of drought stress in flower stage to the physiological and biochemical indices was the largest.The increase rate of MDA was smaller,SOD activity also higher in stronger drought-resistant varieties,while the weak drought-resistant varieties were contrary.The strong drought resistance varieties have regulatory mechanism in physiological and biochemical indices.

关 键 词：马铃薯 干旱胁迫 生理生化指标 

分 类 号：S532[农业科学—作物学]