different between auxin vs phytotropin

English

From Ancient Greek ???????? (auxánein, “to grow”).

auxin (countable and uncountable, plural auxins)

(botany) A class of plant growth substance (often called phytohormones or plant hormones) which play an essential role in coordination of many growth and behavioral processes in the plant life cycle.

phyto- +? -trope +? -in

phytotropin (plural phytotropins)

(biochemistry) Any of a class of substances that inhibits auxin transport and therefore of root growth, gravitropism and phototropism.

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