西洋参胚后熟期间生理生化变化及激素的影响

Physiological and Biochemical Changes During Embryo After-Ripening of American Ginseng(Panax quinquefolius)and Effect of Hormones on Such Changes

自然条件下，西洋参种胚第一年增长很缓慢，α、β-淀粉酶，过氧化物酶活性很低。第二年胚迅速增长，这3种酶活性逐渐上升。激素处理后，显著地提高了这3种酶的活性，加速了胚乳养分的分解，还原糖含量逐渐增高，从而其种子能提早萌发。

In natural condition, two years were needed for Panax quinquefolius seeds to break dormancy. In the first year, the embryo developed slowly, and the activities of amylase and peroxidase were low. In the second year the embryo developed rapidly, and the activities of both enzymes also increased gradually. But with the treatment of hormones enzymatic activ ities accelarated remarkably and speeded up the decomposition of stored nutrients in endos perm, so that starch and non-reducing sugar decreased while reducing sugar incrcased rapidly, resulting in earlier germination.