Abstract
The shoots of Cymbidium goeringii (C. virescens) obtained by culturing for 8 weeks in the dark on the basal medium (KNUDSON C with NITSCH microelement) were transferred to the basal medium with both 10mg/l kinetin and 10-3M L-arginine. After 8 weeks′ culture in the dark, most of samples produced advetitious roots. The shoots cultured on the basal medium with 10mg/l kinetin alone did not produce root.
The shoots being transferred to various kinds of light (white, Vitalux, blue and red) from the dark, most of samples produced adventitious roots at appropriate intensities of light in both C. goeringii and C. insigne.
From these results it may be suggested that the effect of light on the adventitious root formation depends on the intensity rather than the wavelength and is chiefly concerned with photosynthesis and nitrogen assimilation.
