Abstract
High levels of regeneration were obtained from young leaves excised from axillary shoots in proliferating nodal cultures of several Vitis x Muscadinia hybrids. Best results were obtained when the explants were cultured on solidified half-strength Murashige and Skoog medium supplemented with 8.9 μM 6-benzyladenine and 0.05 μM 1-naphthaleneacetic acid. Though variation was observed among the hybrids, the procedure used does not seem to be genotype-specific as all the hybrids and cultivars tested could regenerate. Scanning electron microscopy observations and histological studies carried out during the development of adventitious shoot organogenesis revealed that the promeristem initiation occurred in the outer cell layers near the wounded area of the petiolar stub.
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