P,Q,R and S are four major types of phyt...

P,Q,R and S are four major types of phytohormones. P is a phytohormone which functions mainly as a growth inhibitor. It promotes the wilting and fallin, of leaves. Q, R and S are phytohormones which all promote growth on plants in various ways. Q is responsible for the phenomenon of phototropism in plants. R is involved mainly in shoot extensions. The phytohormone S helps in breaking the dormancy of seeds and buds. what are P,Q,R and S? Give one reason each for your choice.

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The correct Answer is:

P is abscisic acid; Q is auxin; R is gibberellin; S is cytokinin

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Which phytohormone functions as a plant growth inhibitor?

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Knowledge Check

Phytohormones are

A

hormones regulating growth from seed to adulthood

B

growth regulators synthesised by plants and influencing physiological processes

C

hormones regulating flowering

D

hormones regulating secondary growth

Phytohormones are

A

Hormonesregulating growth from seed to adulthood

B

Growth regulators synthesised by plants and influencing physiological process

C

Harmones regulating flowering

D

Harmones regulating Secondary growth

The plant hormones , which promote growth are

A

gibberellins and ethylene

B

auxin gibberellins and cytokinin

C

abscisic acid , ethylene and gibberellins

D

auxins, cytokinins and abscisic acid

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