Cytochrome Oxidase and Mitochondrial Protein in Extracts of Leaves ofNicotiana glutinosaL. Infected with Tobacco Mosaic Virus

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Abstract
Leaves of N. glutinosa were inoculated with tobacco mosaic virus, and infection allowed to develop in situ or in discs cut from the leaves and floated on water or culture solution. Extracts, made from the leaves and discs when their respiration was greater than that of comparable uninfected tissue, contained amounts of protein N, chlorophyll, glycollic oxidase, and mitochondrial protein N, similar to those in extracts from uninfected tissue, but slightly less cytochrome oxidase and considerably more polyphenoloxidase. No evidence was obtained for the view that the virus-induced respiration reflects an increase in the amount of mitochondrial material.