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Effects of bulbs maturity, size and chilling duration on phyllotactic transition in Lilium oriental ‘Casa Blanca’

Kwang Jin Kim, Young Jin Kim , Hye Kyung Rhee, Dae Hoe Gu and Ki Sun Kim

Proceedings of 26th International Horticultural Congress. Volume of Abstract . Toronto, Canada, 11-17 August, 2002. p.307.

2002

บทคัดย่อ

Effects of Bulob Maturity, size and Chilling Duration on Phyllotactic Transition Lilium Oriental 'Casa Blanca'

This study was conducted to identify phyllotactic transition according to bulb maturiy , size and chiling duration in Lilium oriental ‘Casa blanca’. The bulbs were harvested at the intervals of 10 days after flowering, and then stored for 40, 50, 60 and 70 days at 4 oC +- 1. The bulbs with 6-8, 10-12, and 14-16 cm in circumference were used. The immature bulbs harvested at flowering, showed 100% alternate pattern regardless of bulb size, but in the mature bulbs of large size (14-16 cm) harvested 60 days after flowering, the rate of phyllotactic transition froom spiral (2/5) to alternate pattern decreased to 16.7%. As chilling duration became shorter and shorter, the rate of phyllotactic transition increased and the phyllotactic shifted to alternaate pattern at the lower nodes of plant shoot. The plant of phyllotactic transition usually showed spiral (2/5) pattern in low nodes, and the flowr differentiated in the shifted nodes to alternate pattern, and then began vegetative growhth again, and terminal flower buds differentiated in shoot apex. The rate of phyllotactic transition increased in immature or smaller bulb, and shorter chilling.