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Cytokinin

The role of c...

Question

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

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Solution

Cytokinins promote nutrient mobilization which help in the delay of leaf senescence is, this effect is called Richmond-Lang effect

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Q. Cytokinin helps in delay of leaf senescence by:

Q. Identify the correct pair of statements.
(I) Lutein is an oxygenated hydrocarbon.
(II) Inhibition of bacteroid respiration by oxygen is referred to as 'Warburg effect'.
(III) Triplet code 'UAA' is called 'Amber'.
(IV) Delay of senescence by cytokinins is known as 'Richmond-Lang 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. 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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