Plant regeneration from protoplasts of Japanese lawngrass.

Embryogenic callus of Japanese lawngrass (Zoysia japonica Steud.) was induced from sterile mature seeds on LS medium with 5 mg / l of 2,4-D. Embryogenic callus selected visually under microscope was proliferated in liquid N6 medium with amino acids (N6-AA medium). Protoplasts were isolated from suspension cells by the treatment of enzyme mixture containing pectolyase Y-23 and cultured in K8p medium with 2 mg / l of 2,4-D at the density of 10(6) / ml. Plants were regenerated by transferring the protoplasts derived callus to MS medium and incubating at 28 °C under light for two months. Plantlets were successfully transplanted in the soil.