淹水胁迫对水稻植株抗氧化酶变化的影响  

Effects of waterlogging stress on antioxidant enzymes of rice plants

作　　者：黄万勇[1] 卢成[1] 郑世宗[1] 温进化[1] 

机构地区：[1]浙江省水利河口研究院,浙江杭州310020

出　　处：《排灌机械工程学报》2017年第11期1008-1012,共5页Journal of Drainage and Irrigation Machinery Engineering

基　　金：浙江省水利科技计划项目(RB1522);浙江省水利河口研究院院长基金资助项目(ZIHE2016007)

摘　　要：以秀水12号水稻为试验材料,采用盆栽移位受淹法,研究了水稻不同生育阶段淹水胁迫对植株抗氧化酶和过氧化物代谢产物的影响,明确水稻不同生育阶段的耐淹深度和历时.试验处理设置淹水阶段、淹水深度和淹水历时3个因素,每个因素设置3个水平.盆栽受淹时,将取田间原状土分层填充试验盆栽搬移到预先挖好的淹水槽内作受淹试验,水槽内水位保持预设高度;淹水结束后,恢复日常灌溉照薄露灌溉田间水分标准控制.结果表明,水稻植株体内抗氧化酶含量生育后期大于生育前期,适当的水分胁迫可以增加水稻植株体内抗氧化酶的含量.不同生育阶段水稻植株均表现出一定的抵抗淹水逆境能力,但耐淹能力和敏感程度有所差异,分蘖期最强、拔节期最敏感.分蘖期、拔节期和抽穗期水稻的耐淹深度和历时分别为株高的3/4,1/2,3/4和5,3,3 d.＂Xiushui 12＂rice species were used as experimental plant to investigate effects of waterlogging stress on antioxidant enzymes and peroxide metabolites and identify tolerable submergence depth and its duration in various growth stages of rice by means of pot-culture and plant transplant method.In the experiments,waterlogging stage,depth and its duration were selected to be controlled factors,which were subject to three levels each. During a flooding experiment,a pot with plants cultured in farmland original soil was moved to a trough with a water level prescribed in advance and stayed there for a certain long of time. After the experiment,the ordinary irrigation was restored. The results show that the content of antioxidant enzymes in the rice plants in the late growth stage was higher than that in the early growth stage,and an appropriate waterlogging stress could increase the content of antioxidant enzymes. The rice plants in different growth stages show some resistance to waterlogging stress,and the ability to tolerate submergence depth and the sensitivity to the stress differed from one stage to another,particularity they had a strongest ability to tolerate submergence depth in tillering growth stage and were most sensitive to the stress in jointing growth stage. The tolerable submergence depth and duration of waterlogging were 3/4,1/2,3/4 plant height,5,3,3 days in tillering,jointing and heading stagesfor the rice plants,respectively.

关 键 词：水稻 淹水胁迫 抗氧化酶 杭嘉湖平原 

分 类 号：S274[农业科学—农业水土工程] S279[农业科学—农业工程]