锗对水稻萌芽期的生理效应

The Physiological Effects of Germanium Dioxide on the Germinating Rice Seeds

将水稻（ＯｒｙｚａｓａｔｉｖａＬ．）种子浸于从０到３ｍｇ·Ｌ－１不同浓度梯度的ＧｅＯ２溶液中，测量其生理指标：呼吸强度，可溶性糖含量，淀粉酶活性等。发现在浸种的前期，ＧｅＯ２对以上各项生理指标均有促进作用，而随着浸种时间的延长，促进逐渐减弱并转为抑制，淀粉酶同功酶电泳则表明。

Rice seeds were soaked in solutions with diffrent concentrations of GeO 2 ranged from 0 to 3.0 mg·L -1 . Respiratory intensity,quantity of soluble sugar and activity of amylase were tested during germination.It was shown that GeO 2 promoted all the indexes in the first stage of germination, but the promotive effect was decreasing late and at last GeO 2 became inhibitive.Isoenzyme of amylase was analyzed by PAGE.The results showed that the newly appeared isoenzyme of amylase in the germinating rice seed can releave the toxicity of GeO 2.