春小麦不同穗位和粒位籽粒蛋白质积累方式的初步研究

Apreliminary study on protein accumulation of grains in different spikelet and grain locations of spring wheat

利用多小穗大粒型春小麦品种东农7742，研究了不同穗位和粒位籽粒蛋白质积累方式，结果表明：随着灌浆成熟，各部位籽粒蛋白质含量逐渐增加；穗内成熟籽粒蛋白质含量相差9％；不同穗位籽粒蛋白质积累相对含量的顺序为中部粒＞下部粒＞上部粒；不同粒位蛋白积累相对含量的顺序则是第2小花粒≥第1小花粒＞第3小花粒。不同位置籽粒蛋白质的积累能力与其相应的粒重有一定关系，但并非完全一致，表明着生部位和发育时间的早晚及生理机制的差异，影响着蛋白质的积累过程和最终合成。

The protein accumulation of grains in different spikelt and grains locations of spring wheat was investigated using multi-spikelets and higher grain weight cultivar. The results show that the protein contents of all grains increase as grain development, and the difference of grain protein content within the spike can be as high as 9%; the order of protein content in spikelet locations is middle grain>basal grain>upper grain, and the order of protein content within the spikelet is 2nd floret grain≥1st floret...