菜用大豆种子活力与DNA,RNA及蛋白质合成的关系

菜用大豆种子随着其活力的下降,对DNA,RNA和蛋白质前体的吸收,以及合成这些大分子的能力都明显下降,已丧失合成DNA和蛋白质能力的失活种子,仍能进行微弱的RNA合成。高活力种子在吸胀初期DNA合成速率较低,然后增加,至16h达高峰;RNA的合成速率在吸胀一开始就很高,在整个吸胀过程中均保持较高水平;蛋白质的合成速率则在开始较高,并随着吸胀过程呈增强趋势。

The Relation Between Vegetable Soybean Seed Vigor and DNA, RNA and Protein Synthesis

Vegetable soybean is a type ofsoybean (Glycine max L. Merr.) usedas vegetable in green seed stage. The vigor of the seed could be easily reduced during storage under natural conditions in Central and South China because of the wet and hot summer climate. The purpose of this study was to investigate DNA, RNA and protein synthesis of different vigor seeds and to find the relation to seed deterioration. It was found that plumular axes could not synthesize DNA and protein during imbibition when the seeds had lost their viability. But non-viable plumular axes could carry out very weak RNA synthesis. As to plumulan axes of high vigor, DNA synthesis rate was low at the beginning of imbibition and increased as imbibition went on, reaching a maxium at 16 3h of imbibition. High vigor seed started to synthesize RNA at a high rate from the beginning of imbibition which was kept throughout the imbibition process. Plumular axes of high vigor seed began protein synthesis after imbibition was started. DNA, RNA and protein synthesis rate was significantly reduced when the seed vigor became low. From the above results it can be seen that DNA, KNA and protein synthesis abilities are clearly related to seed vigor.