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Totipotency

Cytokinin hel...

Question

Cytokinin helps in delay of leaf senescence by:

A

Increasing more water absorption by root

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B

Increasing rate of translocation of organic solutes

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C

Promoting nutrients mobilization

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D

Formation of adventitious buds

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Solution

The correct option is C Promoting nutrients mobilization
Cytokinins delay the senescence of leaves and other organs by controlling protein synthesis and mobilization of resources. Leaf senescence can be delayed by plant hormones such as cytokinin.

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Q. The role of cytokinins in delay of leaf senescence is called __ effect

Q. Assertion :Senescence is delayed by the application of cytokinin in plants. Reason: Cytokinin prevents the breakdown of chlorophyll, proteins and nucleic acid.

Q. Delay in leaf senescence is caused by ________________

Q. Which of the following statements is /are correct about cytokinin?.
Statement 1: Cytokinin is a hormone whose main function is the induction of cell division and delay in senescence
Statement 2: Cytokinin is the process of cell division
Statement 3: Cytokinin helps in breaking seed dormancy.
Statement 4: Cytokinin helps to overcome apical dominance.

Q. Pick out the correct statements.
(A) Cytokinins specially help in delaying senescence.
(B) Auxins are involved in regulating apical dominance.
(C) Ethylene is especially useful in enhancing seed germination.
(D) Gibberellins are responsible for immature falling of leaves.

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