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《植物学报(英文版)》 2003-05
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Effects of Sodium Thiosulfate on the Occurrence of a Novel Glycolipid in Cyanobacterium Synechocystis sp. PCC 6803 Cells Grown in the Presence of Glucose

WANG Ze_Neng, XU Yi_Nong *, YANG Zhen_Le, HOU Hai_Tong, JIANG Gui_Zhen, KUANG Ting_Yun (Key Laboratory of Photosynthesis and Environmental Molecular Physiology, Institute of Botany, The Chinese Academy of Sciences, Beijing 100093, China)  
A novel lipid occurred when cyanobacterium Synechocystis sp. PCC 6803 cells were grown in BG_11 medium with glucose applied. This lipid was determined to be a glycolipid, designated glycolipid_x (Glyco_x), by staining with α_naphthol and concentrated sulfuric acid. The occurrence of Glyco_x accompanies the disappearance of other lipids, especially DGDG. Glyco_x can also be observed in cells grown in BG_11 medium with the application of other carbon sources: fructose, maltose and lactose. Sodium thiosulfate, an effective scavenger of reactive oxygen intermediates, showed strong capability to inhibit glucose_induced occurrence of Glyco_x. In the presence of 0.3% sodium thiosulfate, Glyco_x could only be detected in cells grown in BG_11 medium with 100 mmol/L glucose applied in late_exponential phase. These results suggest that reactive oxygen species might be involved in the occurrence of Glyco_x in cyanobacterium Synechocystis sp. PCC 6803 cells grown in the presence of glucose.
【Fund】: 中国博士后科学基金 ;; 国家重点基础研究发展规划项目 (G19980 10 10 0 ) ;; 中国科学院百人计划;; 中国科学院植物研究所光合作用基础研究实验室创新项目。~~
【CateGory Index】: Q935
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