| Effects of cadmium on the activities of photosystems of Chlorella pyrenoidosa and the protective role of cyclic electron flow | |
| Shuzhi Wang; Daoyong Zhang; Xiangliang Pan | |
| Corresponding Author | Daoyong Zhang |
| 2013 | |
| Source Publication | Chemosphere (IF:4.208[JCR-2016],4.506[5-Year]) |
| Volume | 93Issue:2Pages:230–237 |
| Abstract | Cadmium (Cd) shows high toxicity to aquatic microalgae. Many studies showed that Cd inhibited activities of photosystem II (PSII) but the effects of heavy metals on photosystem I (PSI) and cyclic electron flow (CEF) were still controversial and unclear. The effects of CdCl2 on the activities of PSI, PSII and CEF in Chlorella pyrenoidosa was measured simultaneously in the present study. In presence of 200 mu M of Cd, ultrastructure of some cells was strongly modified. Cd exposure led to decrease of the activities of photosynthetic oxygen evolution and respiration. PSII was more sensitive to Cd treatment than PSI. Cd treatment showed significant inhibition on the photochemical quantum yield and electron transport rate of PSII. Cd increased the quantum yield of non-light-induced non-photochemical fluorescence quenching, indicating the damage of PSII. The activity of PSI showed tolerance to Cd treatment with concentration less than 100 mu M in the experiment. Linear electron flow (LEF) made significant contribution to the photochemical quantum yield of PSI of the untreated cells, but decreased with increasing Cd concentration. The contribution of CEF to the yield of PSI increased with increasing Cd concentration. The activation of CEF after exposure to Cd played an essential role for the protection of PSI. |
| Keyword | Cadmium Photosystem i Photosystem Ii Cyclic Electron Flow Chlorella Pyrenoidosa |
| Subject Area | 环境地球化学 |
| Indexed By | SCI |
| Language | 英语 |
| Document Type | 期刊论文 |
| Identifier | http://ir.gyig.ac.cn/handle/352002/5005 |
| Collection | 环境地球化学国家重点实验室_环境地球化学国家重点实验室_期刊论文 |
| Corresponding Author | Daoyong Zhang |
| Recommended Citation GB/T 7714 | Shuzhi Wang,Daoyong Zhang,Xiangliang Pan. Effects of cadmium on the activities of photosystems of Chlorella pyrenoidosa and the protective role of cyclic electron flow[J]. Chemosphere,2013,93(2):230–237. |
| APA | Shuzhi Wang,Daoyong Zhang,&Xiangliang Pan.(2013).Effects of cadmium on the activities of photosystems of Chlorella pyrenoidosa and the protective role of cyclic electron flow.Chemosphere,93(2),230–237. |
| MLA | Shuzhi Wang,et al."Effects of cadmium on the activities of photosystems of Chlorella pyrenoidosa and the protective role of cyclic electron flow".Chemosphere 93.2(2013):230–237. |
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