众所周知,在植物界有一种会害羞的草,只要用手轻轻碰它一下,它的枝叶就会马上合拢,随后又会慢慢还原。这种神奇植物为什么会“害羞”呢?原来,含羞草叶柄下有一个叫做“叶枕”的鼓包,里面含有充足的水分,当你用手触摸它的叶子时,叶枕中的水马上流向两边,叶枕瘪了,叶子就垂了下来。 As we all know, in the plant kingdom there is a shy grass, just touch it gently by hand, its foliage will immediately close, and then slowly restored. Why did this magical plant “shy”? Originally, under the petiole of mimosa there was a drumbeat called “leaf pillow ”, which contained enough water that when you touched it with your hands, The water immediately flowed to both sides, and the leaves were flattened, leaving the leaves hanging down.