Plant regeneration from excised hypocotyl explants ofPlatanus acerifoliawilld

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SummaryA method of plant regeneration from hypocotyl segments of Platanus acerifolia Willd, has been developed. Hypocotyl slices were cultured on Murashige and Skoog (MS) basal medium supplemented with a range of combinations of cytokinins [6-benzyladenine (BA) or kinetin] and auxins [indole-3-butyric acid (IBA), indole-3-acetic acid, α-naphthaleneacetic acid or 2,4-dichlorophenoxyacetic acid] for adventitious shoot induetion. The highest regeneration frequency was obtained with MS medium containing 2.0 mg l−1 (8.88 μM) BA and 0.5 mg l−1 (2.46 μM) IBA. Adventitious buds and shoots were differentiated from hypocotyl-derived cellus or directly from the wounded sites within 4-8 wk. The regenerated shoots were elongated and proliferated efficiently on multiplication medium. Complete plantlets were transplanted to the soil and grew normally in the greenhouse after root formation on rooting medium for 4-6 wk.

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