A plastid terminal oxidase comes to light: implications for carotenoid biosynthesis and chlororespiration

Inactivation of a plastid located quinone–oxygen oxidoreductase gene in the immutans Arabidopsis mutant leads to a photobleached phenotype because of a lack of photoprotective carotenoids. Inactivation of the corresponding gene in the ghost tomato mutant leads to a similar phenotype in leaves and to...

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Veröffentlicht in:Trends in Plant Science 2001, Vol.6 (1), p.31-36
Hauptverfasser: Carol, Pierre, Kuntz, Marcel
Format: Artikel
Sprache:eng
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Zusammenfassung:Inactivation of a plastid located quinone–oxygen oxidoreductase gene in the immutans Arabidopsis mutant leads to a photobleached phenotype because of a lack of photoprotective carotenoids. Inactivation of the corresponding gene in the ghost tomato mutant leads to a similar phenotype in leaves and to carotenoid deficiency in petals and ripe fruits. This plastid terminal oxidase (the first to be cloned and biochemically characterized) resembles the mitochondrial cyanide-insensitive alternative oxidase. Here, we propose a model integrating this novel oxidase as a component of an electron transport chain associated to carotenoid desaturation, as well as to a respiratory activity within plastids.
ISSN:1360-1385
1878-4372
DOI:10.1016/S1360-1385(00)01811-2