PSI-driven cyclic electron flow partially alleviates the peroxidation of red alga Gelidium amansii (Gelidiaceae) caused by temporary high temperature
文献类型：CNKI期刊论文
| 作者 | Yongfu LI; Jianguo LIU; Litao ZHANG |
| 发表日期 | 2022-01-15 |
| 出处 | Journal of Oceanology and Limnology
 |
| 关键词 | cyclic electron flow Gelidium amansii heat stress chlorophyll fluorescence quantum yield natural distribution |
| 英文摘要 | PSI-driven cyclic electron fl ow(CEF-I) helps higher plants avoid severe heat damage.Gelidium amansii, a red seaweed used in the production of agar, inhabits subtidal rocks but can be found in the intertidal zone. The biological role of CEF-I is still unclear in this organism. Wild G. amansii was exposed to 30 ℃ heat stress for 12 h with continuous lighting. The results showed that treatment at 30 ℃ gradually decreased maximal PSⅡ photochemical e fficiency( F_v/F_m), linear electron transfer rate, and activity of photosynthetic reaction center. Both the maximal photochemical e fficiency under light( F_v'/F_m')and maximum quantum yield of light-adapted PSⅡ( Φ_(PSⅡ)) were maintained at a relatively stable level during the initial 6 h and then significantly decreased at 12 h. The up-regulated CEF-I helps to enhance proton gradient transfer across thylakoid membrane to protect oxygen-evolving complex against heat damage.Following the addition of a CEF-I inhibitor to plants, the F_v/F_m greatly decreased, suggesting that the CEF-I alleviates degree of photoinhibition caused by strong light. The results of measurement of antioxidant enzymes, including superoxide dismutase(SOD), ascorbate peroxidase(APX) and catalase(CAT), and the contents of H_2O_2 and malonaldehyde(MDA) provided additional evidence that CEF-I plays a protective role to a certain extent for G. amansii to manage stress at 30 ℃. Therefore, it can be concluded that CEF-I enables G. amansii to survive in intertidal zones by protecting it from the heat damage caused by high temperature stress. |
| 文献子类 | CNKI期刊论文 |
| 资助机构 | Supported by the National Key R&D Program of China (No. 2019YFD0900700) |
| 卷 | v.40期:01页:209-218 |
| 语种 | 英文; |
| 分类号 | Q945 |
| ISSN号 | 2096-5508 |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/187537]  |
| 专题 | 中国科学院海洋研究所 |
| 作者单位 | 1.MarineBiologyandBiotechnologyLaboratory,PilotNationalLaboratoryforMarineScienceandTechnology(Qingdao) 2.CASandShandongProvinceKeyLaboratoryofExperimentalMarineBiology,CenterforOceanMega-Science,InstituteofOceanology,ChineseAcademyofSciences |
| 推荐引用方式 GB/T 7714 | Yongfu LI,Jianguo LIU,Litao ZHANG. PSI-driven cyclic electron flow partially alleviates the peroxidation of red alga Gelidium amansii (Gelidiaceae) caused by temporary high temperature. 2022. |
入库方式： OAI收割
来源：海洋研究所
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