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.
‘Both a short day plant and a long day plant can produce can flower simultaneously in a given place’. Explain.
List five main groups of natural plant growth regulators. Write a note on discovery, physiological functions and agricultural/horticultural applications of any one of them.
Describe briefly:
(a) Arithmetic growth
(b) Geometric growth
(c) Sigmoid growth curve
(d) Absolute and relative growth rates
Why is not any one parameter good enough to demonstrate growth throughout the life of a flowering plant?
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