IB-CAS  > 中科院光生物学重点实验室
Excitation dynamics and relaxation in the major antenna of a marine green alga Bryopsis corticulans
Li, Dan-Hong; Wang, Wenda; Zhou, Cuicui; Zhang, Yan; Wang, Peng; Shen, Jian-Ren; Kuang, Tingyun7; Zhang, Jian-Ping
2020
Source PublicationBIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS
ISSN0005-2728
Volume1861Issue:5-6
AbstractThe light-harvesting complexes II (LHCIIs) of spinach and Bryopsis corticulans as a green alga are similar in structure, but differ in carotenoid (Car) and chlorophyll (Chl) compositions. Carbonyl Cars siphonein (Spn) and siphonaxanthin (Spx) bind to B. corticulans LHCII likely in the sites as a pair of lutein (Lut) molecules bind to spinach LHCII in the central domain. To understand the light-harvesting and photoprotective properties of the algal LHCII, we compared its excitation dynamics and relaxation to those of spinach LHCII been well documented. It was found that B. corticulans LHCII exhibited a substantially longer chlorophyll (Chl) fluorescence lifetime (4.9 ns vs 4.1 ns) and a 60% increase of the fluorescence quantum yield. Photoexcitation populated (3)Car* equally between Spn and Spx in B. corticulans LHCII, whereas predominantly at Lut620 in spinach LHCII. These results prove the functional differences of the LHCIIs with different Car pairs and Chl a/b ratios: B. corticulans LHCII shows the enhanced blue-green light absorption, the alleviated quenching of 1 Chl*, and the dual sites of quenching (3)Chl*, which may facilitate its light-harvesting and photoprotection functions. Moreover, for both types of LHCIIs, the triplet excitation profiles revealed the involvement of extra (3)Car* formation mechanisms besides the conventional Chl-to-Car triplet transfer, which are discussed in relation to the ultrafast processes of (1)Chl* quenching. Our experimental findings will be helpful in deepening the understanding of the light harvesting and photoprotection functions of B. corticulans living in the intertidal zone with dramatically changing light condition.
KeywordCarotenoids Marine algae Light harvesting Photoprotection Photosynthesis
Subject AreaBiochemistry & Molecular Biology ; Biophysics
DOI10.1016/j.bbabio.2020.148186
Indexed BySCI
Language英语
WOS KeywordLIGHT-HARVESTING-COMPLEX ; ENERGY-TRANSFER ; PHOTOSYSTEM-II ; PERIDININ-CHLOROPHYLL ; TRIPLET FORMATION ; CATION FORMATION ; STRUCTURAL BASIS ; SINGLET FISSION ; EXCITED-STATES ; HIGHER-PLANTS
WOS Research AreaBiochemistry & Molecular Biology ; Biophysics
WOS IDWOS:000523619700004
PublisherELSEVIER
SubtypeArticle
Publication PlaceAMSTERDAM
EISSN1879-2650
Funding OrganizationNatural Science Foundation of China (NSFC)National Natural Science Foundation of China (NSFC) [21673288, 31600191] ; National Key Research and Development Program of China [2017YFA0503700] ; CAS Key Research program for Frontier Science [QYZDY-SSW-SMC003]
Corresponding Author Emaillidh01@ruc.edu.cn ; wdwang@ibcas.ac.cn ; zhoucc@ibcas.ac.cn ; yerzhang@ruc.edu.cn ; wpeng_chem@ruc.edu.cn ; shen@cc.okayama-u.ac.jp ; kuangty@ibcas.ac.cn ; jpzhang@ruc.edu.cn
OABronze
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ibcas.ac.cn/handle/2S10CLM1/21829
Collection中科院光生物学重点实验室
Affiliation1.[Li, Dan-Hong
2.Zhang, Yan
3.Wang, Peng
4.Renmin Univ China, Dept Chem, Beijing 100872, Peoples R China
5.[Wang, Wenda
6.Zhou, Cuicui
7.Shen, Jian-Ren
8.Chinese Acad Sci, Inst Bot, Key Lab Photobiol, Beijing 100093, Peoples R China
Recommended Citation
GB/T 7714
Li, Dan-Hong,Wang, Wenda,Zhou, Cuicui,et al. Excitation dynamics and relaxation in the major antenna of a marine green alga Bryopsis corticulans[J]. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS,2020,1861(5-6).
APA Li, Dan-Hong.,Wang, Wenda.,Zhou, Cuicui.,Zhang, Yan.,Wang, Peng.,...&Zhang, Jian-Ping.(2020).Excitation dynamics and relaxation in the major antenna of a marine green alga Bryopsis corticulans.BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS,1861(5-6).
MLA Li, Dan-Hong,et al."Excitation dynamics and relaxation in the major antenna of a marine green alga Bryopsis corticulans".BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 1861.5-6(2020).
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