微胚乳玉米子粒中蛋白质积累规律的分析

Analysis on Laws of Accumulation of Protein in Micro-endosperm Maize Kernel

以高油115玉米作为对照,对微胚乳玉米胚和非胚部位中蛋白质的积累规律进行了分析。结果表明,这两类玉米胚部位中的单粒蛋白质重均呈直线增长趋势;在非胚部位,高油115玉米非胚单粒蛋白质重没有消减现象,微胚乳玉米非胚单粒蛋白质重在授粉后28 d达到峰值,之后下降,但其非胚蛋白质质量分数则有明显增长。收获时微胚乳玉米整粒子粒的蛋白质质量分数可达20%,为高油115的2倍左右。

With the Gaoyou115 maize as contrast, the regularity of accumulation of protein in maize embryo and OSK （the other section of a kernel except embryo） of MEM （micro-endosperm maize） were studied in this paper. The results showed that the embryo protein weight per kernel of both corns increased straightly, the OSK protein weight per kernel of Gao you115 maize had not abated during the kernel developing, while that of MEM peaked on around 28 DAP （days after pollination） and there after declined. However, the OSK protein content of MEM increased obviously. The protein content of the whole kernel of MEM during harvesting was 20%, and it was about 2 times as high as that of Gaoyou115.