Question

what are called phytohormones

Answer 1

Plant hormones (also known as phytohormones) are chemicals that regulate plant growth. In the United Kingdom, these are termed 'plant growth substances'. Plant hormonesare signal molecules produced within the plant, and occur in extremely low concentrations. ... The term 'Phytohormone' was coined by Thimann in 1948.

Answer 2

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Phytohormone are the organic compounds produced by the plants which promote, inhibit or control the growth or influence other physiological functions.