種子萌芽期間貯藏物質分解的控制機構

Certain Aspects of Control Mechanism of stored foods Degradation during Seed Germination

The control mechanism of stored foods degradation during seed germination was studied. When one excised cotyledon was incubated with three embryonic axes, it was found that the embryonic axis may stimulate the proteinase activity, RNA synthesis, and reserve protein breakdown in the excised cotyledons. Cytokinins may replace the embryonic axis function and stimulate the proteinase activity and RNA synthesis in the oxcised cotyledous. It is evident that the soybean cotyledon contains more than one proteolytic enzyme. The experimental results show that the embryonic axis may affect de novo synthesis of the peak b component of the proteolytic enzyme. A possible explanation for these results is that the synthesis of proteolytic enzyme in the cotyledons of soybean seed lings is controlled by the embryonic axis and the hormone involed appears to be a cytokinin.