Ca2+-regulated cyclic electron flow supplies ATP for nitrogen starvation-induced lipid biosynthesis in green alga
文献类型：期刊论文
| 作者 | Chen, Hui1; Hu, Jinlu1,2; Qiao, Yaqin1,2; Chen, Weixian1,2; Rong, Junfeng3; Zhang, Yunming1,2; He, Chenliu1; Wang, Qiang1 |
| 刊名 | SCIENTIFIC REPORTS
 |
| 出版日期 | 2015-10-09 |
| 卷号 | 5 |
| ISSN号 | 2045-2322 |
| 英文摘要 | We previously showed that both the linear photosynthetic electron transportation rate and the respiration rate dropped significantly during N starvation-induced neutral lipid accumulation in an oil-producing microalga, Chlorella sorokiniana, and proposed a possible role for cyclic electron flow (CEF) in ATP supply. In this study, we further exploited this hypothesis in both Chlorella sorokiniana C3 and the model green alga Chlamydomonas. We found that both the rate of CEF around photosystem I and the activity of thylakoid membrane-located ATP synthetase increased significantly during N starvation to drive ATP production. Furthermore, we demonstrated that the Chlamydomonas mutant pgrl1, which is deficient in PGRL1-mediated CEF, accumulated less neutral lipids and had reduced rates of CEF under N starvation. Further analysis revealed that Ca2+ signaling regulates N starvation-induced neutral lipid biosynthesis in Chlamydomonas by increasing calmodulin activity and boosting the expression of the calcium sensor protein that regulates Pgrl1-mediated CEF. Thus, Ca2+-regulated CEF supplies ATP for N starvation-induced lipid biosynthesis in green alga. The increased CEF may re-equilibrate the ATP/NADPH balance and recycle excess light energy in photosystems to prevent photooxidative damage, suggesting Ca2+-regulated CEF also played a key role in protecting and sustaining photosystems. |
| WOS标题词 | Science & Technology |
| 类目[WOS] | Multidisciplinary Sciences |
| 研究领域[WOS] | Science & Technology - Other Topics |
| 关键词[WOS] | CHLORELLA SP C2 ; CHLAMYDOMONAS-REINHARDTII ; PHOTOSYSTEM-I ; TRIACYLGLYCEROL ACCUMULATION ; PLANTS ; PHOTOSYNTHESIS ; TRANSCRIPTOME ; SPECIFICITY ; ARABIDOPSIS ; METABOLISM |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000362483500001 |
| 源URL | [http://ir.ihb.ac.cn/handle/342005/27268]  |
| 专题 | 水生生物研究所_藻类生物学及应用研究中心_期刊论文 |
| 作者单位 | 1.Chinese Acad Sci, Inst Hydrobiol, Key Lab Algal Biol, Wuhan, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China 3.SINOPEC Res Inst Petr Proc, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, Hui,Hu, Jinlu,Qiao, Yaqin,et al. Ca2+-regulated cyclic electron flow supplies ATP for nitrogen starvation-induced lipid biosynthesis in green alga[J]. SCIENTIFIC REPORTS,2015,5. |
| APA | Chen, Hui.,Hu, Jinlu.,Qiao, Yaqin.,Chen, Weixian.,Rong, Junfeng.,...&Wang, Qiang.(2015).Ca2+-regulated cyclic electron flow supplies ATP for nitrogen starvation-induced lipid biosynthesis in green alga.SCIENTIFIC REPORTS,5. |
| MLA | Chen, Hui,et al."Ca2+-regulated cyclic electron flow supplies ATP for nitrogen starvation-induced lipid biosynthesis in green alga".SCIENTIFIC REPORTS 5(2015). |
入库方式： OAI收割
来源：水生生物研究所
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