Question

62. In tissue culture of parenchyma, mitosis is accelerated in the presence of
A) Auxin
B)
Cytokynin
C) Auxin and Cytokinin
D) Auxin and Gibberellin
c 11.
11​

Answer 1

Answer:

A) Auxin is present in parenchyma

Answer 2

C) Auxin and Cytokinin. In the tissue culture of parenchyma, mitosis is accelerated in the presence of auxin and cytokinin.

Explanation:

In the tissue culture of parenchyma, mitosis is accelerated in the presence of auxin and cytokinin.

Auxins cause cell enlargement, which is brought on by respiration, increased membrane permeability, increased wall material synthesis, solubilization of carbohydrates, and loosening of wall microfibrils.

Chromosome doubling could still occur without cytokinins, although they are necessary for cytokinesis. Even in permanent cells, the presence of auxins causes cytokinins to create division.

To combat dwarfism and encourage stem and leaf growth, gibberellins boost intemodal growth. Auxin-cytokinin balance controls the regeneration of roots and shoots in calluses.

Typically, too much auxin or cytokinin will encourage root regeneration or shoot regeneration.

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