中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Ultrafast spectroscopic studies on the isolated PSII particles from pseudo ginseng, water hyacinth and spinach leaves

文献类型:期刊论文

作者Xu, SC; Ai, XC; Sun, ZY; Feng, J; Zhang, QY; Zhang, XK
刊名ACTA CHIMICA SINICA
出版日期2001
卷号59期号:6页码:937-944
关键词Water Hyacinth Pseudo Ginseng Psii Particle Single Photon Counting Fluorescence Lifetime Excited Energy Convertion Efficiency
ISSN号0567-7351
英文摘要We have studied the spectroscopic characteristics and the fluorescence lifetime for the PS II particles from pseudo ginseng, water hyacinth and spinach plant leaves by absorption spectra, low temperature steady- state fluorescence spectroscopy and single photon counting measurement under the same conditions. The absorption spectra for the PS II particles at room temperature are similar, which suggests that different plants can efficiently absorb light of the same wavelength. The fluorescence decays in PS II measured at the natural QA state for the PS II particles have been fitted by a three - exponential kinetic model. The three fluorescence lifetimes are 14 ps, 272 ps and 1840 ps for the pseudo ginseng PS II particles; 157 ps, 415 ps and 1661 ps for the water hyacinth PS II particles; 198 ps, 677 ps and 1244 ps for the spinach PS II particles, respectively. The slow lifetime fluorescence component is assigned to a collection of associated light harvesting Chi a/b proteins, the fast lifetime component to the reaction center of PS II and the middle lifetime component to the delay fluorescence of recombination of P-680(+) and Pheo(-). The excited energy conversion efficiency (eta) in PS II RC is 41%, 89%, 91% calculated on the 20 ps model for the pseudo ginseng, water hyacinth and spinach PS II particles, respectively. This interesting result is not consistent with what is assumed that the efficiency is 100% in PS II RC. Our result in this paper also presents a support for the 20 ps electron transfer time constant in PS II being more reasonable. However, our results show those plants can perform highly efficient transfer of photo - excitation energy from the light - harvesting pigment system to the reaction center (near 100%). The results in this paper further demonstrate that the characteristics with slow growth for pseudo ginseng plant is discernible in the primary processes of photosynthesis, plant growth is related with its spectroscopic characteristics and the fluorescence lifetime, and the slower a plant grows the less excited energy efficiency used should be anticipated.
语种英语
WOS记录号WOS:000169511700023
出版者SCIENCE PRESS
源URL[http://ir.iccas.ac.cn/handle/121111/77611]  
专题中国科学院化学研究所
通讯作者Xu, SC
作者单位1.Chinese Acad Sci, Inst Chem, Ctr Mol Sci, State Key Lab struct Chem Unstable & Stable Speci, Beijing 100080, Peoples R China
2.Chinese Acad Sci, Inst Bot, Photosynth Res Ctr, Beijing 100093, Peoples R China
推荐引用方式
GB/T 7714
Xu, SC,Ai, XC,Sun, ZY,et al. Ultrafast spectroscopic studies on the isolated PSII particles from pseudo ginseng, water hyacinth and spinach leaves[J]. ACTA CHIMICA SINICA,2001,59(6):937-944.
APA Xu, SC,Ai, XC,Sun, ZY,Feng, J,Zhang, QY,&Zhang, XK.(2001).Ultrafast spectroscopic studies on the isolated PSII particles from pseudo ginseng, water hyacinth and spinach leaves.ACTA CHIMICA SINICA,59(6),937-944.
MLA Xu, SC,et al."Ultrafast spectroscopic studies on the isolated PSII particles from pseudo ginseng, water hyacinth and spinach leaves".ACTA CHIMICA SINICA 59.6(2001):937-944.

入库方式: OAI收割

来源:化学研究所

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