The histological changes of adventitious buds and the development of adventitious roots had been observed termly by olefin slice of leaf and stem of gynura divaricata DC. during induced process. The results showed that the dedifferentiation started from the ceils at the edge of leaf cut; the major way of morphogenesis was adventitious buds differentiated from the ealli; there were no latent root primodium in the stem of regenerated plant; the adventitious roots developed from induced root primordia, which 12 days late...
