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以吉农15号和吉农24号大豆(Glycine max)品种为材料,根据植株高度平均分为下部、中下部、中部、中上部和上部5个冠层,分析不同冠层种子百粒重、种子活力及萌发7天子叶中抗氧化酶活性和丙二醛含量的变化。结果表明,随着植株冠层的升高,大豆百粒重呈先略上升后逐渐下降的趋势,上部冠层种子的百粒重最小。大豆植株下部与中下部冠层种子的发芽率和发芽势较高;并且该两层的种子活力指数显著高于中上部与上部冠层,种子萌发后幼苗的茎粗也显著大于中上部及上部冠层幼苗。下部与中下部冠层种子萌发时子叶中的抗氧化酶活性高于上部,而丙二醛含量低于上部,说明该两层的大豆种子活力高,萌发后幼苗健壮且子叶新陈代谢旺盛,是优选良种的最佳冠层。
Five varieties of canopy (Glycine max) were used as the material, and the canopy was divided into five parts, ie, lower, middle, middle, upper and upper canopy according to plant height, Changes of Antioxidant Enzyme Activities and Malondialdehyde Contents in Seed Vigor and 7 - day - old Cotyledon. The results showed that with the increase of plant canopy, the weight of 100 grains of soybean began to slightly increase and then decreased gradually. The weight of the upper canopy seeds was the smallest. The seed germination rate and germination energy of the lower and middle canopy seeds of soybean plants were higher than those of the upper canopy. The seed vigor index of the two layers was significantly higher than that of middle and upper canopy. Canopy seedlings. The activities of antioxidant enzymes in cotyledons of lower and middle canopy seeds were higher than those in upper cotyledon, while the content of malondialdehyde was lower than the upper ones, indicating that the two-layer soybean seeds had high viability, strong seedling after germination and strong cotyledon metabolism, which was the optimal The best canola seed.