Plant Cell Culture
Subculturing is similar to propagation by cuttings because

All of these
it separates multiple microshoots and places them in a medium
they both use in vitro growing conditions
it uses scions to produce new microshoots

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Plant Cell Culture
In a callus culture

auxins and cytokinins are not required
increasing level of cytokinin to a callus induces shoot formation and increasing level of auxin promote root formation
increasing level of auxin to a callus induces shoot formation and increasing level of cytokinin promote root formation
only auxin is required for root and shoot formation

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