Institutional Repository of Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences
| Desiccation Induces Accumulations of Antheraxanthin and Zeaxanthin in Intertidal Macro-Alga Ulva pertusa (Chlorophyta) | |
| Xie, Xiujun1; Gao, Shan2,3; Gu, Wenhui2,3; Pan, Guanghua1; Wang, Guangce2; Wang, GC | |
| 2013-09-05 | |
| 发表期刊 | PLOS ONE
 |
| ISSN | 1932-6203 |
| 卷号 | 8期号:9页码:e72929 |
| 文章类型 | Article |
| 摘要 | For plants and algae, exposure to high light levels is deleterious to their photosynthetic machineries. It also can accelerate water evaporation and thus potentially lead to drought stress. Most photosynthetic organisms protect themselves against high light caused photodamages by xanthophyll cycle-dependent thermal energy dissipation. It is generally accepted that high light activates xanthophyll cycle. However, the relationship between xanthophyll cycle and drought stress remains ambiguous. Herein, Ulva pertusa (Chlorophyta), a representative perennial intertidal macro-algae species with high drought-tolerant capabilities and simple structures, was used to investigate the operation of xanthophyll cycle during desiccation in air. The results indicate that desiccation under dim light induced accumulation of antheraxanthin (Ax) and zeaxanthin (Zx) at the expense of violaxanthin (Vx). This accumulation could be arrested by dithiothreitol completely and by uncoupler (carbonyl cyanide p-trifluoromethoxyphenylhydrazone) partially, implying the participation of Vx de-epoxidase in conversion of Vx to Ax and Zx. Treatment with inhibitors of electron transport along thylakoid membrane, e. g. DCMU, PG and DBMIB, did not significantly arrest desiccation-induced accumulation of Ax and Zx. We propose that for U. pertusa, besides excess light, desiccation itself could also induce accumulation of Ax and Zx. This accumulation could proceed without electron transport along thylakoid membrane, and is possibly resulting from the reduction of thylakoid lumen volume during desiccation. Considering the pleiotropic effects of Ax and Zx, accumulated Ax and Zx may function in protecting thylakoid membrane and enhancing thermal quenching during emersion in air.; For plants and algae, exposure to high light levels is deleterious to their photosynthetic machineries. It also can accelerate water evaporation and thus potentially lead to drought stress. Most photosynthetic organisms protect themselves against high light caused photodamages by xanthophyll cycle-dependent thermal energy dissipation. It is generally accepted that high light activates xanthophyll cycle. However, the relationship between xanthophyll cycle and drought stress remains ambiguous. Herein, Ulva pertusa (Chlorophyta), a representative perennial intertidal macro-algae species with high drought-tolerant capabilities and simple structures, was used to investigate the operation of xanthophyll cycle during desiccation in air. The results indicate that desiccation under dim light induced accumulation of antheraxanthin (Ax) and zeaxanthin (Zx) at the expense of violaxanthin (Vx). This accumulation could be arrested by dithiothreitol completely and by uncoupler (carbonyl cyanide p-trifluoromethoxyphenylhydrazone) partially, implying the participation of Vx de-epoxidase in conversion of Vx to Ax and Zx. Treatment with inhibitors of electron transport along thylakoid membrane, e. g. DCMU, PG and DBMIB, did not significantly arrest desiccation-induced accumulation of Ax and Zx. We propose that for U. pertusa, besides excess light, desiccation itself could also induce accumulation of Ax and Zx. This accumulation could proceed without electron transport along thylakoid membrane, and is possibly resulting from the reduction of thylakoid lumen volume during desiccation. Considering the pleiotropic effects of Ax and Zx, accumulated Ax and Zx may function in protecting thylakoid membrane and enhancing thermal quenching during emersion in air. |
| 学科领域 | Science & Technology - Other Topics |
| DOI | 10.1371/journal.pone.0072929 |
| URL | 查看原文 |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS研究方向 | Science & Technology - Other Topics |
| WOS类目 | Multidisciplinary Sciences |
| WOS记录号 | WOS:000324481600044 |
| WOS关键词 | DIATOM PHAEODACTYLUM-TRICORNUTUM ; CYCLIC ELECTRON FLOW ; PHOTOSYSTEM-II ; VIOLAXANTHIN DEEPOXIDATION ; XANTHOPHYLL CYCLE ; PHOTOPROTECTION ; STRESS ; LIGHT ; CHLOROPLASTS ; FLUORESCENCE |
| WOS标题词 | Science & Technology |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.qdio.ac.cn/handle/337002/16557 |
| 专题 | 实验海洋生物学重点实验室 |
| 通讯作者 | Wang, GC |
| 作者单位 | 1.Tianjin Univ Sci & Technol, Coll Marine Sci & Engn, Tianjin Key Lab Marine Resources & Chem, Tianjin, Peoples R China 2.Chinese Acad Sci, Inst Oceanol, Qingdao, Peoples R China 3.Chinese Acad Sci, Grad Sch, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xie, Xiujun,Gao, Shan,Gu, Wenhui,et al. Desiccation Induces Accumulations of Antheraxanthin and Zeaxanthin in Intertidal Macro-Alga Ulva pertusa (Chlorophyta)[J]. PLOS ONE,2013,8(9):e72929. |
| APA | Xie, Xiujun,Gao, Shan,Gu, Wenhui,Pan, Guanghua,Wang, Guangce,&Wang, GC.(2013).Desiccation Induces Accumulations of Antheraxanthin and Zeaxanthin in Intertidal Macro-Alga Ulva pertusa (Chlorophyta).PLOS ONE,8(9),e72929. |
| MLA | Xie, Xiujun,et al."Desiccation Induces Accumulations of Antheraxanthin and Zeaxanthin in Intertidal Macro-Alga Ulva pertusa (Chlorophyta)".PLOS ONE 8.9(2013):e72929. |
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