What is synergetic action of auxin and cytokinins ?
Auxins and cytokinins together cause cell division in callus tissue culture. More auxin and less cytokinin causes root initiation whereas less auxin and more cytokinin cause bud differentiation. This is an example of synergetic action.
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Name the intrinsic and extrinsic factors that control growth ?
Explain the reason : if a plant is grown in dark, its stem is soft, weak, slender and yellow and its leaves turn yellow.
