אסיף מאגר המחקר החקלאי

Photocontrol of hypocotyl elongation in light-grown Cucumis sativus L. - A synergism between the blue-light photoreceptor and phytochrome

Year:

1984

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Volume :

162

Co-Authors:

Attridge, T.H., Department of Biology, North East London Polytechnic, Romford Road, Stratford, London, E15 4LZ, United Kingdom
Black, M., Department of Biology, Queen Elizabeth College, University of London, Campden Hill Road, London, W8 7AH, United Kingdom
Gaba, V., Department of Biology, Queen Elizabeth College, University of London, Campden Hill Road, London, W8 7AH, United Kingdom

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Abstract:

An interaction is demonstrated between the effects of phytochrome and cryptochrome (the specific blue-light photoreceptor) in the inhibition of hypocotyl elongation of light-grown cucumber (Cucumis sativus L.) cv. Ridge Greenline seedlings. At certain fluence rates of blue light the total inhibition response is greater than the sum of the separate responses to each photoreceptor. The threshold for response to blue light is reduced at least 30-fold by additional red-light irradiation. The synergistic effect is demonstrated for two different fluence rates of red light. Synergism is mediated by phytochrome in both the cotyledons and the hypocotyl. © 1984 Springer-Verlag.

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