Archives: Questions and Answers

What would be expected to happen if: (a) GA3 is applied to rice seedlings (b) dividing cells stop differentiating (c) a rotten fruit gets mixed with unripe fruits (d) you forget to add cytokinin to the culture medium.

Would a defoliated plant respond to photoperiodic cycle? Why?

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.

‘Both growth and differentiation in higher plants are open’. Comment.

Why is abscisic acid also known as stress hormone?

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?

Define growth, differentiation, development, dedifferentiation, redifferentiation, determinate growth, meristem and growth rate.