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Plant Physiology 68:823-826 (1981)
© 1981 American Society of Plant Biologists

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Cycloheximide Stimulation of Cyanide-Resistant Respiration in Suspension Cultures of Senescent Pear Fruit Cells

Roger J. Romani1, Timothy J. Bos2 and Jean-Claude Pech3

Department of Pomology, University of California, Davis, CA 95616

Pear fruit cells undergoing a period of senescence in auxin-deprived media develop a substantial cyanide resistant respiration in response to the addition of 0.7 to 3.5 micromolar cycloheximide. The inhibitor does not affect overall cellular repiratory activity and titrations with salicylhydroxamic acid reveal that only a minor portion, about 10%, of the alternate pathway is utilized by the cycloheximide-treated senescent cells. The alternate respiratory pathway appears to be of mitochondrial origin but is not induced by chloramphenicol.

1 To whom reprint requests should be addressed.

2 Present address: Department of Microbiology and Immunology, University of California, Los Angeles, California, 90024.

3 Present address: Laboratoire de Biologie Vegetale, ENSAT, 145 Ave de Muret, F31076, Toulouse, France.






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ASPB Publications PLANT PHYSIOLOGY THE PLANT CELL
Copyright © 1981 by the American Society of Plant Biologists