Ultrafast excitation quenching by the oxidized photosystem II reaction center

doi:10.1063/5.0086046

IB-CAS > 中科院光生物学重点实验室

	Ultrafast excitation quenching by the oxidized photosystem II reaction center
	Akhtar, Parveen 2; Sipka, Gabor ; Han, Wenhui ; Li, Xingyue ; Han, Guangye ; Shen, Jian-Ren; Garab, Gyozo ; Tan, Howe-Siang ; Lambrev, Petar H.
	2022
发表期刊	JOURNAL OF CHEMICAL PHYSICS
ISSN	0021-9606
卷号	156 期号:14
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.
学科领域	Chemistry, Physical ; Physics, Atomic, Molecular & Chemical
DOI	10.1063/5.0086046
收录类别	SCI
语种	英语
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)
WOS记录号	WOS:000789739500004
出版者	AIP Publishing
文献子类	Article
出版地	MELVILLE
EISSN	1089-7690
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]
作者邮箱	howesiang@ntu.edu.sg ; lambrev.petar@brc.hu
引用统计	被引频次：6[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	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.Nanyang Technol Univ, Sch Phys & Math Sci, Nanyang Link 21, Singapore 637371, Singapore 2.Akhtar, Parveen; Sipka, Gabor; Garab, Gyozo; Lambrev, Petar H.] Biol Res Ctr, Temesvari Krt 62, H-6726 Szeged, Hungary 3.ELI ALPS ELI HU Nonprofit Ltd, Wolfgang Sandner U 3, H-6728 Szeged, Hungary 4.Chinese Acad Sci, Inst Bot, Photosynth Res Ctr, Key Lab Photobiol, Beijing, Peoples R China 5.Okayama Univ, Res Inst Interdisciplinary Sci, Okayama, Japan 6.Okayama Univ, Grad Sch Nat Sci & Technol, 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).

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