Globba winitii seeds at 20 days after pollination were collected and cleaned with liquid detergent, washed under running tap water for 15 min, soaked in 70% alcohol for 1 min and sterilized in 20% Clorox for 20 min, followed by 10% Clorox for 10 min and finally soaked with sterilized distilled water 3 times, 1 min each time. The seeds were randomly divided into 6 treatment groups that were trimmed at different parts of the seed: trimmed down to a naked embryo, trimmed at the end of the micropyle, trimmed on one side of the micropyle, trimmed at the base across the micropyle, trimmed on one side at the base and across the micropyle and not trimmed (control) (6 treatments as shown in Figure 1). All seeds were cultured on MS medium supplemented with 10 mg/l BA, 1 mg/l NAA, 10 mg/l GA3 and 30 g/l sucrose. The medium was solidified with 0.8% agar after adjusting the pH to 5.6 and sterilized by autoclaving at 121° C (1.06 Kg-1 m-2) for 20 min. The cultures were maintained at 25 ± 2° C under a 16-h photoperiod with illumination provided by cool fluorescent lamps at an intensity of 60 μmolm-2 sec-1 (TLD 36 w/853350 lm Phillips Thailand). Cultured seeds were subcultured into the same medium every 2 weeks to induce growth. After all seeds germinated, the embryos were transferred to MS medium supplemented with 2 mg/l BA