A) growth regulators
B) growth promoters
C) growth inhibitors
D) All of the above
Correct Answer: D
Solution :
Growth hormones or phytohormones are defined as ?organic substances, which are synthesized in minute quantities in one part of the plant body and transported to another part where they influence specific physiological processes. ?Hormones are synthesized or started in region of transduction they travel within phloem or from cell to cell after reception of the appropriate stimulus. Hormones connected with control of growth are of two types. Growth promoters like auxin, gibberellins and cytokinins and Growth inhibitors like ethylene and ABA etc ethylene is the only gaseous hormone.
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