Mitochondrial alternative oxidase pathway acts as an electron sink during photosynthetic induction in Rumex K-1 leaves
文献类型：期刊论文
| 作者 | Cheng, D. D.2; Zhang, L. T.1 |
| 刊名 | PHOTOSYNTHETICA
 |
| 出版日期 | 2021 |
| 卷号 | 59期号:4页码:615-624 |
| ISSN号 | 0300-3604 |
| 关键词 | alternative oxidase photodamage photosystem II photochemical efficiency photosynthetic induction Rumex K-1 |
| DOI | 10.32615/ps.2021.047 |
| 通讯作者 | Zhang, L. T.(zhanglitao666@163.com) |
| 英文摘要 | Chloroplast PSII photochemical efficiency is upregulated more rapidly than CO2 assimilation during photosynthesis induction, suggesting the existence of other electron sinks than that of CO2 assimilation. We hypothesized that the mitochondrial alternative oxidase (AOX) pathway could be such a sink. Inhibition of the AOX restricted light activation of the malate-oxaloacetate shuttle and caused an excessive reduction of PSI acceptor side and substantial accumulation of QA-, hindering the photosynthetic linear electron transport rate (ETR) and leading to an imbalance between light energy absorption and exploitation during photosynthetic induction. ETR limitation also restricted the formation of thylakoid pH gradient, evidenced by a decreased de-epoxidation of the xanthophyll cycle, thus preventing nonphotochemical quenching. Delayed CO2 assimilation due to thylakoid pH gradient restriction was partially reversed by exogenous ATP application. The AOX pathway acts as a photosynthetic electron sink, protecting the photosynthetic apparatus against photoinhibition and accelerating the induction of CO2 assimilation during photosynthetic induction in Rumex K-1 leaves. |
| 资助项目 | Scientific Research Foundation for Advanced Scholars, Qingdao Agricultural University[20210056] ; State Key Laboratory of Crop Biology[2017KF05] |
| WOS研究方向 | Plant Sciences |
| 语种 | 英语 |
| 出版者 | ACAD SCIENCES CZECH REPUBLIC, INST EXPERIMENTAL BOTANY |
| WOS记录号 | WOS:000733910700015 |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/177551]  |
| 专题 | 中国科学院海洋研究所 |
| 通讯作者 | Zhang, L. T. |
| 作者单位 | 1.Qingdao Agr Univ, Inst Oceanol, Qingdao, Shandong, Peoples R China 2.Qingdao Agr Univ, Coll Landscape Architecture & Forestry, Qingdao, Shandong, Peoples R China |
| 推荐引用方式 GB/T 7714 | Cheng, D. D.,Zhang, L. T.. Mitochondrial alternative oxidase pathway acts as an electron sink during photosynthetic induction in Rumex K-1 leaves[J]. PHOTOSYNTHETICA,2021,59(4):615-624. |
| APA | Cheng, D. D.,&Zhang, L. T..(2021).Mitochondrial alternative oxidase pathway acts as an electron sink during photosynthetic induction in Rumex K-1 leaves.PHOTOSYNTHETICA,59(4),615-624. |
| MLA | Cheng, D. D.,et al."Mitochondrial alternative oxidase pathway acts as an electron sink during photosynthetic induction in Rumex K-1 leaves".PHOTOSYNTHETICA 59.4(2021):615-624. |
入库方式： OAI收割
来源：海洋研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。