| Differential responses of photosystems I and II to seasonal drought in two Ficus species | |
Zhang, Shubin1,2; Huang, Wei3 ; Zhang, Jiaolin1; Cao, Kunfang4,5
| |
| 2016-05-01 | |
| 发表期刊 | ACTA OECOLOGICA-INTERNATIONAL JOURNAL OF ECOLOGY
 |
| 卷号 | 73页码:53-60 |
| 摘要 | Hemiepiphytic Ficus species exhibit more conservative water use strategy and are more drought-tolerant compared with their non-hemiepiphytic congeners, but a difference in the response of photosystem I (PSI) and photosystem II (PSII) to drought stress has not been documented to date. The enhancement of non-photochemical quenching (NPQ) and cyclic electron flow (CEF) have been identified as important mechanisms that protect the photosystems under drought conditions. Using the hemiepiphytic Ficus tinctoria and the non-hemiepiphytic Ficus racemosa, we studied the water status and the electron fluxes through PSI and PSII under seasonal water stress. Our results clearly indicated that the decline in the leaf predawn water potential (psi(pd)), the maximum photosynthetic rate (A(max)) and the predawn maximum quantum yield of PSII (F-v/F-m) were more pronounced in F. racemosa than in F. tinctoria at peak drought. The F-v/F-m of F. racemosa was reduced to 0.69, indicating net photoinhibition of PSII. Concomitantly, the maximal photo-oxidizable P700 (P-m) decreased significantly in F. racemosa but remained stable in F. tinctoria. The fraction of non-photochemical quenching [Y(NPQ)] and the ratio of effective quantum yield of PSI to PSII [Y(I)/Y(II)] increased for both Ficus species at peak drought, with a stronger increase in F. racemosa. These results indicated that the enhancement of NPQ and the activation of CEF contributed to the photoprotection of PSI and PSII for both Ficus species under seasonal drought, particularly for F. racemosa. (C) 2016 Elsevier Masson SAS. All rights reserved. |
| 关键词 | Non-photochemical Quenching Cyclic Electron Flow Osmotic Potential At Turgor Loss Point Predawn Leaf Water Potential Seasonal Drought |
| DOI | 10.1016/j.actao.2016.03.001 |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000376707000007 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.kib.ac.cn/handle/151853/26256 |
| 专题 | 资源植物与生物技术所级重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Xishuangbanna Trop Bot Garden, Key Lab Trop Forest Ecol, Mengla 666303, Yunnan, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Kunming Inst Bot, Kunming 650201, Yunnan, Peoples R China 4.Guangxi Univ, State Key Lab Conservat & Utilizat Subtrop Agrobi, Nanning 530004, Guangxi, Peoples R China 5.Guangxi Univ, Coll Forestry, Nanning 530004, Guangxi, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Shubin,Huang, Wei,Zhang, Jiaolin,et al. Differential responses of photosystems I and II to seasonal drought in two Ficus species[J]. ACTA OECOLOGICA-INTERNATIONAL JOURNAL OF ECOLOGY,2016,73:53-60. |
| APA | Zhang, Shubin,Huang, Wei,Zhang, Jiaolin,&Cao, Kunfang.(2016).Differential responses of photosystems I and II to seasonal drought in two Ficus species.ACTA OECOLOGICA-INTERNATIONAL JOURNAL OF ECOLOGY,73,53-60. |
| MLA | Zhang, Shubin,et al."Differential responses of photosystems I and II to seasonal drought in two Ficus species".ACTA OECOLOGICA-INTERNATIONAL JOURNAL OF ECOLOGY 73(2016):53-60. |
| 条目包含的文件 | 下载所有文件 | |||||
| 文件名称/大小 | 文献类型 | 版本类型 | 开放类型 | 使用许可 | ||
| seasonal drought in （1034KB） | 开放获取 | CC BY-NC-SA | 浏览 下载 | |||
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。
修改评论