干旱胁迫下维生素C对玉米幼苗生长的影响  

Effect of Vitamin C on Maize Seedling Growth under Drought Stress

作　　者：李才生[1] 巫薇薇[1] 胡寿祥[1] 

机构地区：[1]淮阴师范学院,江苏淮安223300

出　　处：《安徽农业科学》2009年第20期9433-9435,共3页Journal of Anhui Agricultural Sciences

摘　　要：[目的]揭示维生素C对增强玉米植株抗旱性的作用,为玉米田间施用维生素C提供参考依据。[方法]用不同浓度的维生素C对干旱胁迫下的玉米幼苗进行处理,测定玉米幼苗的形态指标(叶片长度、植株高度、鲜重、干重和相对含水量)和生理指标[叶绿素含量和过氧化物酶(POD)、超氧化物歧化酶(SOD)活性]。[结果]一定浓度的维生素C对玉米幼苗各项指标都产生了明显的影响。在浓度为40 mg/L时,其效果较明显,形态指标叶片长度、植株高度、鲜重、干重和相对含水量分别比对照组上升了4.6%、12.9%、20.8%、20.0%和20.3%;生理指标叶绿素含量和POD、SOD活性也分别比对照组上升了75.6%、24.6%和23.4%。[结论]维生素C可以提高植物体内的水分含量,并在一定程度上调节酶的活性,对细胞膜起到一定的保护作用,提高了玉米的抗旱性。[ Objective] The reference for the application of vitamin C in maize growth was provided through the research on the resistance - strengthening of maize plant to drought under the treatment of vitamin C. [ Method] The maize seedling under drought stress was treated with different concentrations of vitamin C and the morphological indicator of maize seedling（leaf length, plant height, fresh weight, dry weight and content of relative water） and the physiological indicators [ content of chlorophyll and activity of peroxidase（POD） and superoxide dismutase（SOD） ] were tested. [ Results] All kinds of indicators of maize seedling could be significant impacted by the treatment of vitamin C. At the concentration of 40 mg/L, the effect was obvious and the morphological indicators such as leaf shape length, plant height, fresh weight, dry weight and content of relative water were 4.6%, 12.9%, 20.8%, 20.0% and 20.3% more than that of the control group, respectively; and the physiological indicators including the content of chlorophyll and the activity of POD and SOD were 75.6%, 24.6% and 23.4% higher than that of the control group, respectively. [ Conclusion ] The treatment of vitamin C could increase the moisture content in plants; to some extent, regulate,the enzyme activity; played a role in the protection of the cell membrane and improve the resistance of maize plant to drought.

关 键 词：维生素C 玉米 干旱胁迫 保护酶 幼苗 

分 类 号：S513[农业科学—作物学]