Analysis of temperature effect on the germination of New York lettuce seeds
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概要
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When New York lettuce seeds were imbibed below 20℃ in the dark, full germination was observed, whereas none occurred above 35℃ even under red-light irradiation. Partial treatment with high temperature during imbibition revealed the involvement of a thermo-labile process in the germination. This process was completely inhibited above 30℃ in the dark, but re-activated by the following incubation below 20℃. The longer the seeds were preincubated above 30℃, the longer the period below 20℃ required for re-activation. The results suggest that the thermo-labile process is con-trolled by a thermo-labile factor. The factor was inactivated slowly at 25℃ and rapidly above 30℃ to a form which could be re-activated below 20℃ but was irreversibly inactivated when the seeds were imbibed at temperatures above 45℃ for more than 40 hr. The escape reaction of the phytochrome system proceeded even at 35℃ whereas no germination was observed at that temperature. Thus, the germination of lettuce seeds is regulated not only by the phytochrome system but also by the thermo-labile factor.
- 日本植物生理学会の論文
著者
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Takeba Go
Laboralory Of Applied Biology Faculty Of Living Science Kyoto Prefectural University
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Takeba Go
Laboratory Ofapplied Biology Faculty Of Living Science Kyoto Prefectural University
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Matsubara Satoshi
Laboratory Of Applied Biology Faculty Of Living Science Kyoto Prefectural University
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Matsubara Satoshi
Laboratory Ofapplied Biology Faculty Of Living Science Kyoto Prefectural University
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