The relation between light and temperature effects in the induction and release of dormancy in the aerial tuber of Begonia evansiana

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概要

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• The effect of light quality on the induction and release of bud dormancy in aerial tubers of Begonia evansiana ANDR. and the relation in controlling the mechanism of dormancy between light and temperature were investigated using aerial tubers in different dormant states; immature tubers which were sprouted by irradiation and mature ones which were sprouted only after chilling. Blue or far-red light induced photo-sprouting in immature tubers at hi~her temperatures and also promoted release of dormancy in mature tubers caused by chilling (2-5℃). Blue or far-red light, however, failed to break mature tuber dormancy at room temperature. The induction of dormancy in immature tubers was advanced at low temperatures ( 15-17℃) which were inoperative for photo-sprouting. Lower temperatures showed conflicting dual effects of inducing and breaking dormancy. Red light inhibited not only photo-sprouting in immature tubers but also dormancy release in mature tubers at low temperatures. These light- and temperature-dependent reactions are independently involved in dormancy regulation, the former is overcome by the latter with dormancy development.

• 日本植物生理学会の論文

著者

• Esashi Yoji

  Department Of Biological Science Tohoku University

関連論文

• Control of self-incompatibility by CO_2 gas in Brassica
• Different actions of red and blue or far-red lights in the photoperiodic tuberization of Begonia evansiana
• The relation between light and temperature effects in the induction and release of dormancy in the aerial tuber of Begonia evansiana

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