氮肥对扬麦13籽粒GMP和蛋白质含量调节效应

摘要

以“2＋12”亚基组合小麦品种扬麦13为供试材料，研究了氮素营养对小麦籽粒高分子量谷蛋白亚基（HMW-GS）的积累量、谷蛋白大聚合体（GMP）含量及蛋白质含量的调节效应。结果表明：1）氮肥用量和运筹比例不改变小麦品种HMW-GS组成，但可以提高HMW-GS各位点的亚基积累量，提高亚基的总积累量，氮肥用量对小麦籽粒蛋白质的调控可能是通过亚基来发挥效应的；2）随着氮肥用量的增加，小麦籽粒蛋白质HMW-GS积累量、GMP含量、蛋白质及干湿面筋含量增加；3）不同氮肥运筹比例改变籽粒蛋白质HMW-GS积累量，随氮肥后移籽粒GMP含量、蛋白质含量增加。%The effects of nitrogen on HMW-GS accumulation, GMP and protein contents of Yangmai 13 are studied with the subunits ＂2-1-12＂ as test materials. The results show that nitrogen amount and ratio do not change HMW-GS components but raise its accumulation, and the effect of nitrogen on grain protein and GMP contents of Yangmai 13 is through the accumu- lation of HMW-GS. With the increase of nitrogen amount, HMW-GS accumulation, GMP and protein contents, and dry-glutenin content increase correspondingly, but the increase amounts differ among varieties with different HMW-GS subunits.