How does control and coordination takes place in plants?

1.	How does control and coordination takes place in plants?
Answer» Control and coordination in plants is performed by chemical substances known as plant hormones or phytohormones. The synthesis and action of phytohormones are greatly influenced by external stimuli. Plants respond to photoperiodic stimulus by specialized pigment present in very small quantity called phytochrome. Thus, phytochromes and phytohormones together are involved in control and coordination between environment and plant responses.

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