干旱胁迫对不同玉米品种幼苗可溶性糖和过氧化酶活性的影响  

Effect of Droughts Stress on the Activity of Peroxidase and Soluble Sugar in Leaves of Different Varieties of Zea mays Seedling

作　　者：谢美华[1,2] 罗中泽 吕琴[1] 杨海艳[1,2] 

机构地区：[1]楚雄师范学院化学与生命科学学院,云南楚雄675000 [2]云南省高校应用生物学重点实验室,云南楚雄675000 [3]楚雄州农科所,云南楚雄675000

出　　处：《楚雄师范学院学报》2015年第3期37-42,共6页Journal of Chuxiong Normal University

基　　金：云南省重点建设学科;楚雄师范学院重点建设学科基金项目;项目编号:05YJJSXK03;云南省高校科技创新团队支持计划项目;项目编号:IRTSTYN;楚雄师范学院基金项目;项目编号:10YJYB02;楚雄师范学院大学生创新创业训练计划项目;项目编号:2013cxcy04

摘　　要：本研究以玉米品种天紫23号、黄甜脆1号、白甜糯1号、早鲜黄甜脆幼苗为试验材料,研究了干旱胁迫(停止浇水)、干旱胁迫时间(1d、2d、3d、4d、5d)和解除干旱胁迫恢复7d生长后叶片内可溶性糖含量、过氧化物酶活性这两项生理指标的变化。结果表明:(1)在干旱胁迫条件下,与对照相比,天紫23号幼苗叶片中可溶性糖含量随着干旱胁迫天数的增加而增加,而早鲜黄甜脆、白甜糯1号和黄甜脆1号叶片中可溶性糖含量在干旱胁迫的前4天均增加,而第5天则都下降低于对照值。4种品种玉米幼苗叶片中的过氧化物酶(POD)活性与对照相比都明显上升;(2)解除干旱胁迫恢复生长后4种品种玉米幼苗叶片中的可溶性糖含量和过氧化物酶活性恢复趋于对照值。推测在受到干旱胁迫后,玉米植物体内增加可溶性糖的含量和过氧化物酶的活性以适应干旱胁迫环境。而短期的胁迫解除后,这两项生理指标又趋于恢复到正常水平。Four Zea mays varieties,Tianzi 23,Huangtiancui 1,Baitiannuo 1,Zaoxianhuangtiancui,were selected as the materials. Changes in leaf soluble sugar content and peroxidase activity were respectively measured after the following treatments： 1. no watering,2. drought stress time from 1 to 5 days,3.7d after relieving drought stress. The results showed that：（ 1） Under the drought soluble sugar content and peroxidase activity in leaves of 4 varieties of Zea mays were closen to that of control after relieving drought stress. Here,we inferred maize plants increased the content of soluble sugar and peroxidase activity in order to adapt to the drought stress environment under drought stress. However,the two physiological indices returned to normal level when short term stress was relieved.

关 键 词：干旱胁迫 可溶性糖 过氧化物酶(POD) 玉米 

分 类 号：S513.01[农业科学—作物学]