Ye. Choi et al., REGENERATIVE ABILITY OF SOMATIC SINGLE AND MULTIPLE EMBRYOS FROM COTYLEDONS OF KOREAN GINSENG ON HORMONE-FREE MEDIUM, Plant cell reports, 17(6-7), 1998, pp. 544-551
Cotyledon explants of Korean ginseng (Panax ginseng C. A. Meyer) produ
ced somatic embryos directly on growth regulator-free medium. Somatic
embryos developed as either multiple or single-state forms, depending
on the degree of maturity of the cotyledons. Cotyledon explants from m
idmature zygotic embryos formed multiple embryos, while cotyledons fro
m fully mature zygotic embryos formed single embryos. Somatic single e
mbryos regenerated into normal plantlets with both roots and shoots, w
hile multiple embryos did not produce roots but regenerated only into
multiple shoots. In full-strength MS basal medium, the root growth of
plantlets derived from single embryos was weak compared to that of sho
ots. Deletion of ammonium nitrate from the MS medium promoted the root
growth of the plantlets. The ginseng plants with well-developed shoot
s and roots regenerated from single embryos were successfully acclimat
ized in a greenhouse when they were planted in soil.