不同染色体倍性小麦分蘖期氮同位素组成的研究  

Study on the Nitrogen Isotopic Composition of Wheat with Different Chromosome Ploidy at Tillering Stage

作　　者：王周锋[1,2] 刘卫国[2] 王政[2] 邓西平[3] 

机构地区：[1]长安大学环境科学与工程学院,陕西西安710054 [2]中国科学院地球环境研究所黄土与第四纪地质国家重点实验室,陕西西安710075 [3]中国科学院水土保持研究所,陕西杨陵712100

出　　处：《安徽农业科学》2011年第6期3200-3203,共4页Journal of Anhui Agricultural Sciences

基　　金：国家自然科学基金(40673012;40523002和40121303);中国科学院方向性项目(KZCX3-SW-139);黄土与第四纪地质国家重点实验室开放基金(SKLLQG0613)

摘　　要：[目的]研究不同染色体倍性小麦分蘖期氮同位素组成(δ15N)的变化。[方法]以不同染色体倍性小麦及不同抗旱性小麦为试验材料,采用EA-Delta pluse质谱仪测定并研究了小麦叶片、根系和整株氮含量、δ15N的变化。[结果]随着染色体倍性的增加(2n→6n),小麦整株δ15N呈增加趋势,整株δ15N更能代表小麦生长过程中氮的分馏情况;现代小麦整株δ15N与其收获性状有关,即高产小麦的δ15N较低。[结论]该研究可为选择高氮利用效率小麦提供理论依据。[Objective] The variation of nitrogen isotopic composition（δ15N） of wheat with different chromosome ploidy at tillering stage was studied in our paper.[Method] Using wheat with different chromosome ploidy and drought resistance as test material,the nitrogen content and δ15N of wheat leaf,root and whole plant were determined and studied by means of EA-Delta pluse mass spectrometer.[Result] With the increase of chromosome ploidy（2n→6n）,the δ15N of whole plant showed increase trend and could more reflect the fractionation of nitrogen in the growth of wheat;the δ15N of whole plant in modern wheat was related to yield character,namely high-yield wheat had lower δ15N.[Conclusion] Our study could provide theoretical basis for choosing wheat with high nitrogen use efficiency.

关 键 词：小麦 分蘖期 氮同位素 染色体倍性 

分 类 号：S512.1[农业科学—作物学]