A) growth regulators
B) growth promoters
C) growth inhibitors
D) all of these
Correct Answer: D
Solution :
Plant hormones or phytohormones can be defined as A plant hormone is a chemical substance produced naturally in plants which is translocated to another region for regulating (by inhibitory or enhencing effect) one or more physiological reaction when present in low concentration. Growth Promoters -Auxins, Gibberellins and Cytokinins Growth inhibitor-Ethylene, A BA etc.
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