Nature, intracellular distribution and formation of terpenoid quinones in maize and barley shoots.
1. Maize and barley shoots have been shown to contain phylloquinone, plastoquinone, alpha-tocopherol (and gamma-tocopherol in maize), alpha-tocopherolquinone and ubiquinone-9. 2. No solanesol was detected in any tissue examined. 3. In maize shoots plastoquinone and alpha-tocopherolquinone were localized in the chloroplast; ubiquinone was in the mitochondria. 4. Etiolated (dark-grown) shoots contained smaller amounts of phylloquinone and plastoquinone; alpha-tocopherolquinone was entirely absent; ubiquinone and alpha-tocopherol concentrations were unaffected. 5. On illumination of etiolated shoots the chloroplastidic quinones phylloquinone, plastoquinone and alpha-tocopherolquinone were synthesized in step with chloroplast development. alpha-Tocopherolquinone was not formed at the immediate expense of alpha-tocopherol.
D002338:Carotenoids / Q000378:metabolism; D002734:Chlorophyll / Q000378:metabolism; D002736:Chloroplasts / Q000378:metabolism; D002845:Chromatography; D002854:Chromatography, Paper; D003624:Darkness; D002523:Edible Grain / Q000378:metabolism*; D008027:Light; D008055:Lipids / Q000032:analysis; D008928:Mitochondria / Q000378:metabolism; D063245:Plant Development; D011809:Quinones / Q000378:metabolism*; D013057:Spectrum Analysis; D013729:Terpenes; D014451:Ubiquinone / Q000378:metabolism*; D014810:Vitamin E / Q000378:metabolism*; D010837:Vitamin K 1 / Q000378:metabolism*; D003313:Zea mays / Q000378:metabolism*
D008055:Lipids; D011809:Quinones; D013729:Terpenes; D014451:Ubiquinone; D014810:Vitamin E; D002734:Chlorophyll; D002338:Carotenoids; D010837:Vitamin K 1