种子一旦达到生理成熟后,便开始经历老化的过程,其活力逐渐降低。种子在活力下降的初期,虽然还未能从发芽率的变化中被觉察,但是,往往首先在生化反应上迅速表现出来。这些生化变化,在种子吸水后几天,甚至几小时内就可以被测出。我们在测定芝麻、绿豆、大豆种子的发芽力和活力的同时,探讨了这些种子在萌发中的生化变化,试图了解种子的年产度与生理生化变化的关系。 Once the seeds reach physiological maturity, they begin to experience the process of aging, and their vitality gradually decreases. In the early stage of seed vigor decline, although it has not yet been able to detect changes in the germination rate, but often the first rapid biochemical reaction manifested. These biochemical changes can be detected within days or even hours after the seeds have been absorbed. We measured the germination and vigor of sesame, mung bean and soybean seeds, and discussed the biochemical changes of these seeds in germination. We tried to understand the relationship between the annual yield and the physiological and biochemical changes.