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...
Gespeichert in:
Veröffentlicht in: | Trends in Plant Science 2001, Vol.6 (1), p.31-36 |
---|---|
Hauptverfasser: | , |
Format: | Artikel |
Sprache: | eng |
Schlagworte: | |
Online-Zugang: | Volltext |
Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
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 |