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Plant and Cell Physiology, 1984, Vol. 25, No. 6 1033-1037
© 1984

Article

Photostimulation of Hydroxypyruvate Reductase Activity in Peroxisomes of Pharbitis nil Seedlings: I. Action Spectrum

Francoise Tchang1, Alain Lecharny2 and Paul Mazliak1

1Laboratoire de Physiologie Cellulaire, Université P. & M. Curie 4 Place Jussieu, 75005 Paris, France
2Laboratoire du Phytotron, Centre National de la Recherche Scientifique 91190 Gif-sur-Yvette, France

Hydroxypyruvate reductase activity in etiolated cotyledons of Pharbitis nil is highly stimulated by white light. The action spectrum shows three effective regions: blue, red and far red. The main characteristics of this high irradiance reaction response is a high blue efficiency and a low red efficiency. Experiments with herbicide-treated plants demonstrated that chlorophyll is not involved in the regulation but suggest that a specific blue-absorbing pigment is involved, in addition to phytochrome.

(Received November 22, 1983; Accepted June 20, 1984)
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