Which phytohormone is generally used in tissue culture for establishing roots in callus?

Cytokinins

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Auxins

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Gibberellins

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abscissic acid

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Solution

The correct option is D Auxins
Callus is a growing mass of unorganized parenchyma cells used in plant tissue culture. It is formed due to intermediate level of auxins and cytokinins. A high ratio of cytokinin to auxin favors shoot formation and a high auxin to cytokinin ratio favors root formation in callus. Thus the correct answer is option B.

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