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Effect of Sodium Thiosulfate on the Depletion of Photosynthetic Apparatus in Cyanobacterium Synechocystis sp. PCC 6803 Cells Grown in the Presence of Glucose

2002; Institute of Experimental Botany of the Czech Academy of Sciences; Volume: 40; Issue: 3 Linguagem: Inglês

10.1023/a

1573-9058

Zeneng Wang, Yinong Xu, Zhenle Yang, Haitong Hou, Gui‐Zhen Jiang, Tingyun Kuang,

Plant Stress Responses and Tolerance

Fluorescence spectroscopy at 77 K showed that the application of glucose lead to the depletion of phycobilisomes (PBS) and photosystems (PS) 2 and 1, and that PS2 was more sensitive to glucose than PS1. The application of sodium thiosulfate, an effective scavenger of reactive oxygen intermediates, counteracted the effects of glucose. Sodium thiosulfate effectively protected photosynthetic apparatus, PS2, PS1, and PBS against glucose-induced depletion. Sodium thiosulfate showed strong capability to inhibit the disappearance of chlorophyll induced by glucose. At a relatively low concentration of glucose, the application of sodium thiosulfate can even be helpful for the assembly of photosynthetic apparatus. Hence the reactive oxygen species might be involved in the depletion of the photosynthetic apparatus in the cyanobacterium Synechocystis sp. PCC 6803 cells grown in the presence of glucose.