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The CDK activity controls differentiation fate of cells in a restricted period during organogenesis. (A) Leaf sections of the transgenic line R1-1 were cultured for the indicated days on a medium containing 2.0 μg/ml NAA without DEX, and then transferred to a medium containing 2.0 μg/ml NAA and 1 μM DEX until 28 days after starting the culture. (Bar, 1 cm.) (B) Schematic representation of requirement of CDK activity in the process of organogenesis on leaf explants.
