草业学报2011，Vol.20Issue(6)：93-100,8.
氮素对不同氮效率小黑麦基因型叶片保护酶活性和膜脂过氧化的影响
Effect of nitrogen on protective enzyme activities and lipid peroxidation in triticale genotypes with different N use efficiency
摘要
Abstract
To elucidate the effect of nitrogen on biomass of shoot, protective enzyme activities and lipid peroxi-dation in triticale leaves at different growing stages (seeding, tillering, jointing and heading) , a pot experiment was carried out using four N levels (0, 0. 25, 0. 50 and 1. 00 g N/pot) with two triticale genotypes, one of high N use efficiency (P1429186) and one of low N use efficiency (Clxt74). 1) At the same N levels, shoot biomass of P1429186 was significantly greater than that of Clxt74 at different growth stages. At the same growth stages, shoot biomass was greater when more N was supplied, and the increasing capacity of P1429186 was much greater than that of Clxt74. 2) During seeding, the activities of superxoide dismutase (SOD), peroxidase (POD) , and catalase (CAT) in leaves of P1429186 were greater than in Clxt74 at the same N levels. Contrari-ly, malondialdehyde (MDA) content was significantly lower in P1429186 than in Clxt74. 3) Correlation analysis showed that shoot biomass had various correlations with the activities of SOD, POD, and CAT in leaves of triticale at different growth stages, and had a negative correlation with MDA content. This indicated that, the protective enzymes of P1429186 can cooperate with each other to eliminate reactive oxygen species, thereby inhibiting membrane lipid peroxidation to increase photosynthesis and yield.关键词
小黑麦/氮效率/叶片保护酶/膜脂过氧化Key words
triticale(Triticosecale)/ N use efficiency/ protective enzyme activity/ lipid peroxidation分类
农业科技引用本文复制引用
匡艺,李廷轩,余海英..氮素对不同氮效率小黑麦基因型叶片保护酶活性和膜脂过氧化的影响[J].草业学报,2011,20(6):93-100,8.基金项目
国家自然科学基金(40901138),国家科技支撑计划子课题(2008BAD98B03)和四川省教育厅基金项目(07ZB063)资助. （40901138）
