这到底是怎么一回事呢?我查了下《十万个为什么》这本书,原来含羞草对外界的刺激十分敏感,它的叶子里含有一种叫叶褥的细胞组织,里面充满水分。只要一受振动,叶褥里的水马上向上和两边流动。这样一来,叶褥下面的水没了,就会瘪下去,上面因充满水而鼓起,整个叶子于是就合拢折叠起来了。含羞草的老家在巴西,那里经常有狂风暴雨,有了这种本领,它就可以避免风雨的无情摧残了。哦,我明白了,含羞草会害羞,其实是在保护自己呀。
What's the matter? I checked the book "100000 why". It turns out that Mimosa is very sensitive to external stimulation. Its leaves contain a kind of cell tissue called leaf plate, which is full of water. As soon as it vibrates, the water in the mattress flows up and on both sides. In this way, the water under the leaf mattress is gone, and it will shrivel down, and the upper part will be filled with water, so the whole leaf will be folded up. Mimosa's home in Brazil, where there are often storms, with this ability, it can avoid the relentless destruction of the wind and rain. Oh, I see. Mimosa is shy. It's actually protecting itself.
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