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绿豆芽为什么会变紫

更新时间: 2020-10-20 00:00:00     

绿豆芽怕光,所以在浇水时如果见光,甚至是日光灯的光,就会变紫色,带苦味。

变化的原理:

种子发芽以后,叶绿体逐渐减少,这时因为叶绿体中的色素含有镁离子,在根吸收的营养中很大一部分是有机物,而有机物可以和叶绿素发生反应,即生成镁的沉淀,形成去镁叶绿素,从而显紫色。

关键词: 豆芽 为什么

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