Elimination of the Far-Red-Induced Lag Phase of Chlorophyll a Accumulation by a Brief Light in Pharbitis nil Cotyledons

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概要

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• In dark-grown Pharbitis nil seedlings, far-red light (FR) irradiation of 48 h or less promotes Chl a accumulation in the first 2-h of a subsequent white light (WL) period, without a lag phase of Chl a accumulation. However, continuous FR irradiation of 72 h or more, causes the so-called FR-induced lag phase. A 5-min WL given 4 h before the onset of the continuous WL promotes Chl a accumulation irrespective of the length of the preceding FR irradiation period, if a 4-h dark period is inserted between the 5-min WL and continuous WL. This suggests that the effect of the brief WL is independent of and additive to the effect of the preceding FR irradiation, although the effect of the FR irradiation changes from promotive to inhibitory with an increase in the irradiation period. Red light (R) is more active than blue light (B) in this brief light effect. The R effect is reversed by subsequent exposure to FR when the period of the preceding FR irradiation is 24 h, but not when it is 72 h. The relative effectiveness of B to R increases after prolonged FR irradiation.

• 日本植物生理学会の論文

著者

• Yoshida Kazuichi

  Laboratory Of Applied Botany Faculty Of Agriculture Kyoto University

関連論文

• Correlation between Biosynthesis of Chlorogenic Acid and Flowering in Asparagus Seedlings Induced by Carbamate Compounds
• Effect of High-intensity Light Given Prior to Low-temperature Treatment on the Long-day Flowering of Pharbitis nil
• Kinetic Study on the Development of the Capacity to Accumulate Chlorophyll A without a Lag Phase during Continuous Far-Red Irradiation in Pharbitis nil Seedlings
• Elimination of the Far-Red-Induced Lag Phase of Chlorophyll a Accumulation by a Brief Light in Pharbitis nil Cotyledons

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