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Interactions of green or red light with blue light on the dark closure of Albizzia pinnules
Author(s) -
Tanada Takuma
Publication year - 1984
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1984.tb06096.x
Subject(s) - phytochrome , blue light , red light , far red , botany , phototropism , green light , fluence , sunlight , photon flux , biology , biophysics , horticulture , optics , physics , photon , laser
The interactions of green or red light with blue light on the dark closing of Albizzia julibrissin Durazz. pinnules have been investigated. Irradiations at 430, 450 and 470 nm progressively delay dark closing with increasing photon fluence rates. Red or green light alone has no effect. However, when the blue fluence rate is low, both red and green light interact with it and increase the delaying effect of the blue light. When the blue fluence rate is high, green light interacts with it to negate some of the effectiveness of the blue light, while red light has no effect. This is similar to results obtained previously with far‐red light. It is suggested that the same unidentified photoreceptor is operating in both the far‐red and blue regions. The results also indicate the presence of a blue‐only absorbing photoreceptor whose action is increased by phytochrome.