河南农业大学学报2024，Vol.58Issue(2)：187-194,8.DOI:10.16445/j.cnki.1000-2340.20240301.001
不同胁迫下郑麦0943的耐低氮高温特性研究
Study on physiological characters of a wheat variety named Zhengmai 0943 to low nitrogen and high temperature stresses
摘要
Abstract
[Objective]To illuminate the physiological mechanism of Zhengmai 0943 to low nitrogen and high temperature tolerance,and provide theoretical basis for breeding high yield and high efficiency wheat variety.[Method]We took Zhoumai 18(a check variety in national regional trial)and Aikang 58(a wide spread variety)as control materials.The gas exchange parameters,chlorophyll fluorescence parameters,nitrogen metabolism and antioxidant enzyme activity,content of reactive oxygen species and malonaldehyde were measured and analyzed under normal treatment,low nitrogen stress treatment,high temperature stress treatment,low nitrogen and high temperature stress treatment.[Result]The effect of low nitrogen on photosynthetic physiology of wheat was significantly greater than high temperature,and the tolerance of different wheat varieties to low nitrogen and high temperature was significantly different.Under the three stress treatments,the net photosynthetic rate(Pn),transpiration rate(Tr),stomatal conductance(Gs),PSHmaximum photochemical efficiency(Fv/Fm),photochemical quenching(qP)and PS Ⅰactivity of Zhengmai 0943 were significantly higher than those of Zhoumai 18 and Aikang 58.On the other hand,the superoxide anion formation rate,hydrogen peroxide(H2O2)and malondialdehyde(MDA)content of Zhengmai 0943 were significantly lower than those of Zhoumai 18 and Aikang 58,showing better resistance to low nitrogen and high temperature.The activities of nitrate reductase(NR),glutamine synthetase(GS),glutamate synthase(GOGAT),superoxide dismutase(SOD),peroxidase(POD)and catalase(CAT)of Zhengmai 0943 were significantly higher than those of Zhoumai 18 and Aikang 58.[Result]The effect of low nitrogen on the photosynthetic physiology of wheat was significantly greater than that of high temperature.Zhengmai 0943 had better resistance to low nitrogen and high temperature than the two control varieties,showed higher activity of nitrogen metabolism related and antioxidant enzyme under adversity,and maintained higher photochemical and carbon assimilation efficiency.关键词
小麦品种/郑麦0943/低氮高温/光合作用/氮代谢/抗氧化酶Key words
wheat variety/Zhengmai 0943/low nitrogen and high temperature stress/photosynthesis/nitrogen metabolism/antioxidant enzyme分类
农业科技引用本文复制引用
齐学礼,王永霞,陈鹏,杜习军,王信,赵明忠,张煜,董海滨..不同胁迫下郑麦0943的耐低氮高温特性研究[J].河南农业大学学报,2024,58(2):187-194,8.基金项目
国家小麦产业技术体系项目(CARS-03-7) （CARS-03-7）
国家重点研发计划项目(2022YFD1200205) （2022YFD1200205）
