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Cytokinins

Cytokinins ar...

Question

Cytokinins are known to

A

Help in retention of chlorophyll

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B

Promote formation of abscission layer

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C

Inhibit cytoplasmic movement

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D

Influence water transport

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Solution

The correct option is A
Help in retention of chlorophyll

Cytokinins are known to help in retention of chlorophyll and delay senescence. In senescent leaves, disintegration of chlorophyll takes place. Leaves turn yellow, proteins are degraded and ultimately leaves are shed from the plant. Cytokinin delays all these processes related to senescence.

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Similar questions

Q. Select the correct statements.
A) Inhibitor-B, abscission II & dormin are chemically different.
B)

G A_{3}

speeds up malting process in brewing industry.
C) Auxins promote flowering in pineapple but promote abscission of only older mature leaves & fruits.
D) Natural cytokinins are secreted by cells in zone of elongation.

Q. Choose the right from the following.
i. In light, hormone auxin, helps the cells to grow longer in plants .
ii. Plant hormone gibberellins helps in growth of a stem.
iii. Cytokinins inhibits cell division.
iv. Abscisic acid promote growth in plants.

Q. Which statements are correct?

a

- Cytokinins suppress the synthesis of chlorophyll

b

- Auxins control apical dominance

c

- Gibberellins promote shoot elongation

d

- Abscisic acid enables seeds to with-stand desication.

Q. Ethylene causes apical hook formation in dicot seedlings, promotes senescence and abscission of plant leaves and flowers.

Q. Pick up the correct statements.
(A) Cytokinins promote cell division.
(B) Auxins promote growth.
(C) Abscisic acid promotes growth.
(D) Gibberellins inhibit growth.

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