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Plant Physiology 52:309-311 (1973)
© 1973 American Society of Plant Biologists

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Articles

Phytochrome Destruction

An Apparent Requirement for Protein Synthesis in the Induction of the Destruction Mechanism 1

George H. Kidd2 and Lee H. Pratt

a Department of Biology, Vanderbilt University, Nashville, Tennessee 37235

Examination of the phytochrome destruction reaction as a function of age in etiolated oat (Avena sativa L. cv. Garry) seedlings demonstrates that following illumination of 3-day-old shoots there is a lag, not observed in 4- or 5-day-old oats, prior to the onset of destruction. This light-mediated induction of the phytochrome destruction mechanism in 3-day-old shoots is inhibited by chloramphenicol, actinomycin D, and puromycin suggesting that protein synthesis is required. In 4-day-old shoots, actinomycin D and puromycin do not alter the kinetics of destruction while chloramphenicol partially inhibits the process. Thus, the inhibitors have a specific effect on the induction of the destruction mechanism but not its subsequent operation.

2 Present address: The Biological Laboratories, 16 Divinity Avenue, Harvard University, Cambridge, Mass. 02138.

1 This research was supported by National Science Foundation Grant GB 17057.






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Copyright © 1973 by the American Society of Plant Biologists