question_answer 9)

Which one of the plant growth regulators would you use if you are asked to (a) induce rooting in a twig (b) quickly ripen a fruit (c) delay leaf senescence (d) induce growth in axillary buds (e) 'bolt’ a rosette plant (f) induce immediate stomatal closure in leaves.  

Answer:

(a) Cytokinin (b) Ethylene (c) Cytokinins (d) Auxin (e) Gibberellins (f) Abscisic acid.