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| Photosystem I shows a higher tolerance to sorbitol-induced osmotic stress than photosystem II in the intertidal macro-algae Ulva prolifera (Chlorophyta) | |
Gao, Shan1,2; Zheng, Zhenbing1,2; Gu, Wenhui1,2; Xie, Xiujun3; Huan, Li1,2 ; Pan, Guanghua3; Wang, Guangce1; Wang, GC (reprint author), Chinese Acad Sci, Inst Oceanol, Key Lab Expt Marine Biol, Qingdao 266071, Peoples R China.
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| 2014-10-01 | |
| 发表期刊 | PHYSIOLOGIA PLANTARUM
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| 卷号 | 152期号:2页码:380-388 |
| 文章类型 | Article |
| 摘要 | The photosynthetic performance of the desiccation-tolerant, intertidal macro-algae Ulva prolifera was significantly affected by sorbitol-induced osmotic stress. Our results showed that photosynthetic activity decreased significantly with increases in sorbitol concentration. Although the partial activity of both photosystem I (PS I) and photosystem II (PS II) was able to recover after 30min of rehydration, the activity of PS II decreased more rapidly than PS I. At 4M sorbitol concentration, the activity of PS II was almost 0 while that of PS I was still at about one third of normal levels. Following prolonged treatment with 1 and 2M sorbitol, the activity of PS I and PS II decreased slowly, suggesting that the effects of moderate concentrations of sorbitol on PS I and PS II were gradual. Interestingly, an increase in non-photochemical quenching occurred under these conditions in response to moderate osmotic stress, whereas it declined significantly under severe osmotic stress. These results suggest that photoprotection in U. prolifera could also be induced by moderate osmotic stress. In addition, the oxidation of PS I was significantly affected by osmotic stress. P700(+) in the thalli treated with high concentrations of sorbitol could still be reduced, as PS II was inhibited by 3-(3,4-dichlorophenyl)-1,1-dimethylurea (DCMU), but it could not be fully oxidized. This observation may be caused by the higher quantum yield of non-photochemical energy dissipation in PS I due to acceptor-side limitation (Y(NA)) during rehydration in seawater containing DCMU. |
| 学科领域 | Plant Sciences |
| DOI | 10.1111/ppl.12188 |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000342318600014 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.qdio.ac.cn/handle/337002/24144 |
| 专题 | 实验海洋生物学重点实验室 |
| 通讯作者 | Wang, GC (reprint author), Chinese Acad Sci, Inst Oceanol, Key Lab Expt Marine Biol, Qingdao 266071, Peoples R China. |
| 作者单位 | 1.Chinese Acad Sci, Inst Oceanol, Key Lab Expt Marine Biol, Qingdao 266071, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Tianjin Univ Sci & Technol, Coll Marine Sci & Engn, Tianjin 300457, Peoples R China |
| 第一作者单位 | 实验海洋生物学重点实验室 |
| 推荐引用方式 GB/T 7714 | Gao, Shan,Zheng, Zhenbing,Gu, Wenhui,et al. Photosystem I shows a higher tolerance to sorbitol-induced osmotic stress than photosystem II in the intertidal macro-algae Ulva prolifera (Chlorophyta)[J]. PHYSIOLOGIA PLANTARUM,2014,152(2):380-388. |
| APA | Gao, Shan.,Zheng, Zhenbing.,Gu, Wenhui.,Xie, Xiujun.,Huan, Li.,...&Wang, GC .(2014).Photosystem I shows a higher tolerance to sorbitol-induced osmotic stress than photosystem II in the intertidal macro-algae Ulva prolifera (Chlorophyta).PHYSIOLOGIA PLANTARUM,152(2),380-388. |
| MLA | Gao, Shan,et al."Photosystem I shows a higher tolerance to sorbitol-induced osmotic stress than photosystem II in the intertidal macro-algae Ulva prolifera (Chlorophyta)".PHYSIOLOGIA PLANTARUM 152.2(2014):380-388. |
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