Role of the Quality of Light in the Photoperiodic Flowering Response in Four Latitudinal Ecotypes of Chenopodium rubrum L.
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概要
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The effect of the quality of light on the photoperiodic flowering response in four latitudinal ecotypes of Chenopodium rubrum was examined. Two southern ecotypes, Sel-184 (50°10' N) and Sel-194 (34°20' N), displayed an obligate short-day plant under white (W), red (R) and blue (B) light. Sel-372 (62°46' N), the most northern ecotype, was day-neutral in B and W light and had an ambiphotoperiodic response in R light. Sel-374 (60°47' N) was an ambiphotoperiodic in B light and had a short-day response in W and R light. In the B light regimens, the flowering of Sel-374 was modified from a typical ambiphotoperiodic to day-neutral response by changing the temperature from 20℃ to 12℃. The photopriodic flowering response in the 8-16 hr photoperiod was suppressed severely by the reducing light intensity from 3,000 to 1,500 ergs・cm^<-2>.sec^<-1>, but that in continuous illumination was lowered only slightly by decreasing the lightintensity. The ambiphotoperiodic flowering response differed in its reaction to light; flowering in the 8-18 hr photoperiod required a high intensity light independent of the quality of light, and flowering in the 24 hr photoperiod was promoted by B light. We considered the ambiphotoperiodic flowering response to be a combination of the obligate short-day flowering response and the flowering response for an extreme long-day condition, which is favored by B light. Therefore, this photoperiodic response probably is an intermediate step in the short-day and day-neutral responses in day-neutralization.
- 日本植物生理学会の論文
著者
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Ishiguri Yoshio
Institutefor Agricultural Research Tohoku University
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Ishiguri Yoshio
Institute For Agricultural Research Tohoku University
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Tsuchiya Takeshi
Institutefor Agricultural Research Tohoku University
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Tsuchiya Takeshi
Institute for Materials Research, Tohoku University
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