这是通过一个复杂的化学信使系统来完成的，在植物中包括激素和其他调节分子。
This is accomplished by a complex system of chemical messengers that in plants include hormones and other regulatory molecules.
有迹象表明，多效性植物激素实际上可能通过激活酶来发挥作用，这些酶从细胞壁释放出这些更为特殊的化学信使。
There are indications that pleiotropic plant hormones may actually function by activating the enzymes that release these other, more specific chemical messengers from the cell wall.
被称为神经递质的分子是化学信使。
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