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Light-Induced De-Epoxidation of Violaxanthin in Guard Cell Protoplasts of Vicia faba |
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| Authors: | Masamoto Kazumori; Kinoshita Toshinori; Shimazaki Ken-ichiro |
| Institution: | 1Biological Laboratory, Faculty of Education, Kumamoto University Kumamoto, 860 Japan 2Department of Biology, Faculty of Science, Kyushu University Hakozaki, Fukuoka, 812 Japan 3Biological Laboratory, College of General Education, Kyushu University Fukuoka, 810 Japan |
| Abstract: | Photosynthetic pigments of Vicia guard cell protoplasts (GCPs)from abaxial epidermis were analyzed by reverse-phase HPLC.Violaxanthin decreased and zeaxanthin increased in GCPs afterlight illumination. The epoxidation state of GCPs decreasedfrom 0.82 (dark) to 0.37 (light), suggesting operation of thexanthophyll cycle in GCPs of Vicia faba. (Received March 15, 1993; Accepted May 10, 1993) |
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