An efficient and rapid in vitro method was developed for regeneration of Phalaenopsis using leaf segments derived in vitro
from flower stalk nodes. Leaf segments of four cultivars Tinny Sunshine ‘Annie’, ‘Taisuco Hatarot’, Teipei Gold ‘Golden
Star’, Tinny Galaxy ‘Annie’ cultured on Murashige and Skoog medium supplemented with N 6-benzyladenine (BA;
88.8mM) and a-naphthaleneacetic acid (NAA; 5.4 mM) produced an average of 10–13 protocorm-like bodies (PLBs) after
12 wk. PLB proliferation was achieved on a modified Hyponex medium (1 g l21 6.5N24.5P219K 20N220P2
20K 2 g l21 peptone 3% (w/v) potato homogenate 0.05% activated 1 g l21 charcoal) and an optimal number of 13–
18 PLBs developed from single PLB sections of different cultivars. Plantlet development was also achieved on a modified
Hyponex medium. By repeated subculture of PLBs on a proliferation medium, and culturing them in the plantlet
regeneration medium, plantlets could be produced continuously. Approximately 6 mo. were required from the initiation of
culture to the production of plantlets for transplant to community pots.