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Induction of cell division activity and ...

Induction of cell division activity and delay in senescence is caused by

A

gibberellin

B

auxin

C

cytokinin

D

ethylene

Text Solution

Verified by Experts

The correct Answer is:
C
The most important function of cytokinins is the promotion of cell division. The varying amounts of cytokinins, alongwith sufficient auxins is required for the growth of callus in tissue culture experiments. Cytokinins delay the senescence of leaves and other organs by mobilisation of nutrients. it is known as Richmond-Lang effect.
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[A] : Cytokinins help in the retention of chloro- phyll and delay senescence in leaves. [R]: Cytokinins only stimulate root initiation

Identify the correct statement regarding cytokinins. I. Cytokinins induce cell division . II. Cytokinins delay the onset of senescence. III. Cytokinins initiate chloroplast formation in the presence of light . IV. Application of Cytokinins reduces the apical dominance and stimulates the growth of lateral buds.

NCERT FINGERTIPS-PLANT GROWTH AND DEVELOPMENT-Plant Growth And Development
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  2. Auxin and cytokinin are antagonistic in which of the following funtion...

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  3. Induction of cell division activity and delay in senescence is caused ...

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  4. Cytokinins help to produce all except

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  5. Which among the following is not a function of cytokinis?

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  6. Match column I with column II and select the correct option from the c...

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  7. Read the given statements and select the correct option. Statement 1...

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  8. Arifical ripening of fruits is caused by the treatment of

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  9. If a rotten fruit gets mixed with unripe fruits, the unripe fruits wil...

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  10. The most widely used compound as a source of C(2)H(4) is

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  11. Read the given statements to identify the phytohormone that performs t...

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  12. Gibberellins promote the formation of ul(A)flowers on genetically ul(B...

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  13. A farmer grows cucumber plants in his field. He wants to increase the ...

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  14. Seed dormancy is caused by

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  15. Select the mismatched pair.

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  16. Read the given statements and identify the plant hormones X,Y and Z. ...

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  17. The hormone 'X' does the following functions. (i) Induces seed dorma...

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  18. The hormone which reduces transpiration rate by inducing stomatal clos...

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  19. Bud dormancy is induced by

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  20. Hormone responsible for ageing is

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