Forcing Characteristics of Easter Lily Bulbs Exposed to Elevated-ethylene and -carbon Dioxide and Low-oxygen Atmospheres

in Journal of the American Society for Horticultural Science
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  • 1 Department of Horticulture, Ohio Agricultural Research and Development Center, The Ohio State University, Columbus, OH 43210

Exposure of bulbs of Easter Lily (Lilium longiflorum Thunb.) to a maximum of 2 μl ethylene/liter during vernalization delayed flowering by 5 to 7 days and decreased the number of flower buds. Ethylene exposure for 5 days at 21C after vernalization accelerated shoot emergence and flowering by up to 3 days. No floral or plant abnormalities were observed after bulb exposure to ethylene. Exposure to atmospheres with 0%, 0.5%, or 1% O2 at 21C for up to 2 weeks before or 10 days after vernalization did not “significantly impair subsequent bulb forcing. Storage in 1% 02 at 21C for 1 week before vernalization resulted in nearly one additional secondary bud initiated per plant. Exposure to up to 15% CO2 at 21C for up to 2 weeks before or 10 days after vernalization did not significantly impair subsequent forcing.

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