Optimal days after pollination for a good germination of seeds which were crossed by self or reciprocal pollination between white and/or purple colored flower was examined and effect of plant growth regulators, fruit juice or homogenate, light intensity and day length were also studied for growth and propagation of seedlings of Bletilla striata which was native in southern part of Korea.
1. Length of ovary was increased for up to 4 weeks and width of ovary, for up to 12 weeks after pollination, but growth of ovary was entirely stopped at 14 weeks after pollination.
2. Percentage of germination from seed of 150 days after pollination was highest, on the other hand, seed germination from 100 days after pollination was the lowest. Protocorm like bodies were frequently formed from the seeds, but those bodies were little formed from seeds of 150 days after pollination.
3. NAA was effective to growth of pseudobulb, and IAA was good for growth of seedlings, but growth of shoot and root were worse in NAA containing medium than in IAA added one.
4. Growth of seedlings was inhibited in apple, tomato juice, banana homogenate and coconui water containing medium, compared with no fruit juice added medium.
5. Optimal light intensity and day length for growth of seedlings were identified as 16-hour photoperied and 1,000lux light intensity.
Shoot length was shorter in high light intensity than in low light intensity.
6. More numerous shoots were emerged from longitudinally divided pseudobulb into 2 parts in 1.0㎎/ℓ NAA and 3.0㎎/ℓ BA containing medium.
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