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俗话说“人怕伤心,树怕伤根”,一句话道出了根在植物生活中的重要意义。那末根的作用究竟是什么呢?长期以来,人们往往只是认为,它有吸收、运输、支持和贮藏几种作用。殊不知根还是一位“多才多艺”的合成“能手”,好比是植物的地下“工厂”。一些无机物在这里被转化成有机物……烟硷的“来历”科学家们很早就注意到这样一个奇怪的现象:烟草植株中的烟硷,几乎百分之九十以上集中在叶片中,但是切下烟叶,进行离体培养,却始终没有发现烟叶本身有合成烟硷的本领。这是怎么一回事呢?外
As the saying goes, “people are afraid of being sad and trees are afraid of hurting the roots.” In a word, the important meaning of roots in plant life is revealed. What is the role of the roots? For a long time, people often just think that it has the functions of absorbing, transporting, supporting and storing. It does not know that root is still a “multi-talented” synthetic “competitor”, it is like a plant underground “factory.” Some of the inorganics are converted here to organic matter... The “origins” of the soot scientists have long noticed this strange phenomenon: the haze in tobacco plants is almost 90% concentrated in the leaves, but The tobacco leaves were cut off and cultured in vitro. However, the tobacco leaf itself had no ability to synthesize smoke. What’s going on here?