Ultrafast excitation quenching by the oxidized photosystem II reaction center
文献类型：期刊论文
| 作者 | Akhtar, Parveen4; Sipka, Gabor; Han, Wenhui; Li, Xingyue; Han, Guangye; Shen, Jian-Ren; Garab, Gyozo; Tan, Howe-Siang; Lambrev, Petar H. |
| 刊名 | JOURNAL OF CHEMICAL PHYSICS
 |
| 出版日期 | 2022 |
| 卷号 | 156期号:14 |
| ISSN号 | 0021-9606 |
| DOI | 10.1063/5.0086046 |
| 文献子类 | Article |
| 英文摘要 | Photosystem II (PSII) is the pigment-protein complex driving the photoinduced oxidation of water and reduction of plastoquinone in all oxygenic photosynthetic organisms. Excitations in the antenna chlorophylls are photochemically trapped in the reaction center (RC) producing the chlorophyll-pheophytin radical ion pair P+ Pheo(-). When electron donation from water is inhibited, the oxidized RC chlorophyll P+ acts as an excitation quencher, but knowledge on the kinetics of quenching is limited. Here, we used femtosecond transient absorption spectroscopy to compare the excitation dynamics of PSII with neutral and oxidized RC (P+). We find that equilibration in the core antenna has a major lifetime of about 300 fs, irrespective of the RC redox state. Two-dimensional electronic spectroscopy revealed additional slower energy equilibration occurring on timescales of 3-5 ps, concurrent with excitation trapping. The kinetics of PSII with open RC can be described well with previously proposed models according to which the radical pair P+ Pheo(-) is populated with a main lifetime of about 40 ps, which is primarily determined by energy transfer between the core antenna and the RC chlorophylls. Yet, in PSII with oxidized RC (P+), fast excitation quenching was observed with decay lifetimes as short as 3 ps and an average decay lifetime of about 90 ps, which is shorter than the excited-state lifetime of PSII with open RC. The underlying mechanism of this extremely fast quenching prompts further investigation. Published under an exclusive license by AIP Publishing. |
| 学科主题 | Chemistry, Physical ; Physics, Atomic, Molecular & Chemical |
| 电子版国际标准刊号 | 1089-7690 |
| 出版地 | MELVILLE |
| WOS关键词 | CHLOROPHYLL-A FLUORESCENCE ; HARVESTING COMPLEX II ; ENERGY-TRANSFER ; CHARGE-SEPARATION ; TRIPLET-STATES ; CORE COMPLEX ; ANTENNA COMPLEX ; QUANTUM YIELDS ; MECHANISM ; DYNAMICS |
| WOS研究方向 | Science Citation Index Expanded (SCI-EXPANDED) |
| 语种 | 英语 |
| 出版者 | AIP Publishing |
| WOS记录号 | WOS:000789739500004 |
| 资助机构 | National Research, Development and Innovation Office [FK-139067, PD-138498, 2018-1.2.1-NKP-2018-00009] ; Eotvos Lorand Research Network [KO-37/2021, SA-76/2021] ; Singapore Ministry of Education Academic Research Fund [Tier 1 RG2/19, Tier 1 RG14/20] ; National Key R&D Program of China [2017YFA0503700, 2020YFA0907600] ; CAS Project for Young Scientists in Basic Research [YSBR-004] ; Strategic Priority Research Program of the Chinese Academy of Sciences [XDA26050402] |
| 源URL | [http://ir.ibcas.ac.cn/handle/2S10CLM1/28748]  |
| 专题 | 中科院光生物学重点实验室 |
| 作者单位 | 1.Okayama Univ, Grad Sch Nat Sci & Technol, Okayama, Japan 2.Chinese Acad Sci, Inst Bot, Photosynth Res Ctr, Key Lab Photobiol, Beijing, Peoples R China 3.ELI ALPS ELI HU Nonprofit Ltd, Wolfgang Sandner U 3, H-6728 Szeged, Hungary 4.Akhtar, Parveen; Sipka, Gabor; Garab, Gyozo; Lambrev, Petar H.] Biol Res Ctr, Temesvari Krt 62, H-6726 Szeged, Hungary 5.Nanyang Technol Univ, Sch Phys & Math Sci, Nanyang Link 21, Singapore 637371, Singapore 6.Okayama Univ, Res Inst Interdisciplinary Sci, Okayama, Japan |
| 推荐引用方式 GB/T 7714 | Akhtar, Parveen,Sipka, Gabor,Han, Wenhui,et al. Ultrafast excitation quenching by the oxidized photosystem II reaction center[J]. JOURNAL OF CHEMICAL PHYSICS,2022,156(14). |
| APA | Akhtar, Parveen.,Sipka, Gabor.,Han, Wenhui.,Li, Xingyue.,Han, Guangye.,...&Lambrev, Petar H..(2022).Ultrafast excitation quenching by the oxidized photosystem II reaction center.JOURNAL OF CHEMICAL PHYSICS,156(14). |
| MLA | Akhtar, Parveen,et al."Ultrafast excitation quenching by the oxidized photosystem II reaction center".JOURNAL OF CHEMICAL PHYSICS 156.14(2022). |
入库方式： OAI收割
来源：植物研究所
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