低氮胁迫对超高产玉米叶片保护酶活性的影响  

Effects of Low Nitrogen Stress on Activities of Protective Enzymes of Ultrahigh-Yield Maize

作　　者：刘宇[1] 韩林[1] 王思远[1] 吴春胜[1] 

机构地区：[1]吉林农业大学农学院,长春130118

出　　处：《吉林农业大学学报》2011年第1期5-8,13,共5页Journal of Jilin Agricultural University

基　　金：国家粮食丰产工程项目(2004BA520A09);吉林玉米丰产高效集成研究与示范项目

摘　　要：试验研究了低氮胁迫对玉米叶片保护酶活性的影响。结果表明:低氮胁迫下,各品种植株的MDA含量变化较大;CAT、POD活性变化较大,都呈单峰曲线变化,以正常施氮处理水平下CAT活性最高,且随着施氮量的降低逐渐降低,以无氮处理水平下POD活性最高,且随着施氮量的增加而逐渐降低;而SOD活性虽呈现单峰曲线变化,但却随着施氮量的增加而升高。在低氮胁迫条件下,"郑单958"、"先玉335"保护酶活性较高,丙二醛含量较低,抗衰老能力强,适应环境能力较强,叶片衰老慢。Effects of low nitrogen stress on activities of protective enzymes of maize leaf were studied. The results showed that： Under low nitrogen stress, MDA content in plant species changed greatly; CAT and POD activities changed greatly, showing a single peak curve, and in the normal nitrogen treatment level, CAT activities were the highest, and decreased with the decrease of nitrogen; In the no nitrogen treatment level, POD activities were the highest, but decreased with the increase of nitrogen. The SOD activity was the opposite, and although the changes showed a single peak, it increased with the increase of nitrogen. Under the low N stress conditions, activities of protective enzymes of ＂zhengdan 958＂ and ＂xianyu 335＂ were higher, MDA was lower, anti-aging ability and the ability to adapt to the environment were higher, and leaf senescence was slower.

关 键 词：玉米 低氮胁迫 保护酶 氮肥 

分 类 号：S513.01[农业科学—作物学]