花生种子活力与贮藏蛋白质降解的关系

DEGRADATION OF STORAGE PROTEINS IN GERMINATING PEANUT SEEDS IN RELATION TO SEED VIGOR

摘要:

花生种子吸胀2d后,子叶中肽链内切酶活性上升,贮藏蛋白质开始降解。高活力种子肽链内切酶活性在吸胀2d后迅速上升,至4d时达到高峰,而中等活力种子的肽链内切酶活性上升速度缓慢。高活力种子萌发时贮藏蛋白质降解速度高于中等活力种子。中等活力种子经PEG和PUT处理可提高种子活力,也促进了种子贮藏蛋白质降解能力的提高。

Abstract:

The endopeptidase activity in high-vigor peanut ( Arachis hypogaea L. )seeds increased rapidly from the 2nd day to 4th day after imbibition and reached its peak at the 4th day after imbibiton, while the endopeptidase activity in medium-vigor seeds increased slowly after imbibition. The contents of salt-soluble proteins and arachin in high-vigor seeds declined more rapidly .than those in medium-vigor seeds, pretreatment with PEG and PUT enhanced both the vigor and the degradation rate of storage proteins of ...