Sophora toromiro (Phil.) Skottsb. is a woody species in imminent danger of extinction. Since natural regeneration by seeds is poor and plant growth is very slow, asexual propagation is necessary. In vitro regeneration from 3-to 4-month-old seedlings was achieved. A range of naphthaleneacetic acid and benzyladenine concentrations induced root formation in nodal segment explants, developing plantlets, and also promoted axillary bud development. In subculture, nodal sections derived from axillary growth initiated multiple shoot formation and roots in a liquid medium leading to plantlet formation.
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