Statement P: Callus culture medium contains a | vedclass

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(A) In plant tissue culture,callus is an undifferentiated mass of cells grown on a nutrient medium.To induce growth and differentiation,specific plant

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Both statement $P$ and statement $Q$ are correct.

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(A) In plant tissue culture,callus is an undifferentiated mass of cells grown on a nutrient medium.To induce growth and differentiation,specific plant growth regulators are added to the medium.Auxins and cytokinins are the most important plant hormones used in tissue culture.Auxins promote cell elongation and root initiation,while cytokinins promote cell division (cytokinesis) and shoot initiation.Therefore,both statements are scientifically accurate as they act as growth promoters and initiate cell division in the culture.

Statement $P$: Callus culture medium contains auxin and cytokinin.
Statement $Q$: They are growth promoters and initiate cell division.

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$S$ - Statement: An undifferentiated mass of cells in a culture is called callus.
$R$ - Reason: Auxin and cytokinin are added as growth regulators in the culture medium for callus induction.

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Statement $P$: Callus culture medium contains auxin and cytokinin.Statement $Q$: They are growth promoters and initiate cell division.