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Plant and Cell Physiology, 1977, Vol. 18, No. 5 1167-1171
© 1977

Short Communication

Changes in ethylene production of vernalized plants

Hiroshi Suge

National Institute of Agricultural Sciences Nishigahara, Kita-ku Tokyo 114, Japan

The rate of ethylene production (seed/day) in sprouted seeds of radish and pea increased during the first 9 and 13 days, respectively, after the start of low temperature treatment, and decreased thereafter. Ethylene production of vernalized plants after transfer to high temperature was compared with that of nonvernalized plants at nearly the same developmental stage. In all three vernalizable plants, radish, pea and wheat, vernalized seedlings showed decreased rates of ethylene production. After vernalization, a new peak of an unidentified volatile, which was slightly slower than that of ethylene in its retention time on gas-chromatography, appeared in all three vernalizable plants. This new peak in radish appeared after about 6 days of chilling which corresponds to the minimum chilling period required for flower promotion.

(Received February 8, 1977; )
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