Energy transfer from phycobilisomes to photosystem I at room temperature

被引：4

作者：

Biswas, Avratanu ^{[1
,2
,3
,4
]}

Akhtar, Parveen ^{[3
]}

Lambrev, Petar H. ^{[3
]}

van Stokkum, Ivo H. M. ^{[1
,2
]}

机构：

[1] Vrije Univ Amsterdam, Dept Phys & Astron, Fac Sci, Amsterdam, Netherlands

[2] Vrije Univ Amsterdam, Fac Sci, LaserLaB, Amsterdam, Netherlands

[3] HUN REN Biol Res Ctr, Inst Plant Biol, Szeged, Hungary

[4] Univ Szeged, Doctoral Sch Biol, Szeged, Hungary

来源：

FRONTIERS IN PLANT SCIENCE | 2024年 / 14卷

关键词：

photosystem I (PSI); global analysis (GA); target analysis; phycobilisomes (PBs); energy transfer (ET); EXCITATION-ENERGY; MUTANT; APCD; CYANOBACTERIA; CHLOROPHYLL; ASSOCIATION; PHYCOCYANIN; COMPONENTS; KINETICS; MODEL;

D O I：

10.3389/fpls.2023.1300532

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

The phycobilisomes function as the primary light-harvesting antennae in cyanobacteria and red algae, effectively harvesting and transferring excitation energy to both photosystems. Here we investigate the direct energy transfer route from the phycobilisomes to photosystem I at room temperature in a mutant of the cyanobacterium Synechocystis sp. PCC 6803 that lacks photosystem II. The excitation dynamics are studied by picosecond time-resolved fluorescence measurements in combination with global and target analysis. Global analysis revealed several fast equilibration time scales and a decay of the equilibrated system with a time constant of approximate to 220 ps. From simultaneous target analysis of measurements with two different excitations of 400 nm (chlorophyll a) and 580 nm (phycobilisomes) a transfer rate of 42 ns-1 from the terminal emitter of the phycobilisome to photosystem I was estimated.

引用

页数：10

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