Study on the nitrogen isotopic composition of wheat with different chromosome ploidy at tillering stage____ | 不同染色体倍性小麦分蘖期氮同位素组成的研究_
2011
Wang Zhoufeng, Chinese Academy of Sciences, Xi’an (China), Institute of Geochemistry | Liu Weiguo, Chinese Academy of Sciences, Xi’an (China), Institute of Geochemistry | Wang Zheng, Chinese Academy of Sciences, Xi’an (China), Institute of Geochemistry
chinois. ［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。_
Afficher plus [+] Moins [-]anglais. ［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._
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