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phytochrome

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(fīt′ō krōm′)

noun

a bluish-green plant protein that, in response to variations in red light, regulates the growth of plants

Origin: phyto- + -chrome

See phytochrome in American Heritage Dictionary 4

noun

A cytoplasmic pigment of green plants that absorbs light and regulates dormancy, seed germination, and flowering.

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phytochrome science

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