First slide

Plant Growth Regulators

Question

Just prior to the reproductive phase, internodes elongate enormously causing a marked increase in stem height. This phenomenon is known as

Easy

A

Photoperiodism
B

Vernalization
C

Bolting
D

Phototropism

Solution

Gibberellins promotes bolting (internode elongation just prior to flowering) in beet, cabbages and many plants with rosette habit.

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