Orchids are well known for being major trade
plants in developed countries (Sagawa & Kunisaki,
1984). In vitro culture has proved particularly
useful with groups of plants, which are difficult to
propagate using conventional techniques (Fay 1994).
When mass propagation of a new hybrid or a varity
is needed within a short time, tissue culture is the
only method (Goh et al.1992)