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Plant Growth and Development

Multiple Choice Questions

61.

In callus culture, roots can be induced by the supply of

auxin
cytokinin
gibberelin
ethylene

62.

The bioassay of auxin is

avena curvature test
callus formation
culture of fungus
seed dormancy

63.
Induction of flowering by low temperature treatment is

vernalization

cryobiology

photoperiodism

prunning

vernalization

Vernalization is chilling or cold treatment of the young plants in order to induce flowering. It is a process for shortening the juvenile or vegetative phase of the plants in order to fasten the flowering process. Common examples includes winter rye, winter wheat, winter barley, pea etc.

Cryobiology is the study of life at low temperature, ie, at liquid nitrogen and preservation of organisms by chemical methods.

Photoperiodism is the effect of photoperiods or daily duration of light hours on the growth and development of flowering in plants.