Ultrafast spectral studies of the primary processes of photosynthesis in spinach and water hyacinth leaves
文献类型：期刊论文
| 作者 | Xu, SC; Sun, ZY; Ai, XC; Feng, J; Zhang, QY; Zhang, XK; Yu, F; Tang, CQ; Kuang, TY |
| 刊名 | ACTA BOTANICA SINICA
 |
| 出版日期 | 2000-12-01 |
| 卷号 | 42期号:12页码:1235-1242 |
| 关键词 | Water Hyacinth Spinach Chloroplast Single Photon Counting Fluorescence Lifetime Excitation Energy Conversion Efficiency |
| ISSN号 | 0577-7496 |
| 英文摘要 | The authors have studied the spectroscopic characteristics and the fluorescence lifetime for the chloroplasts from spinach (Spinacia oleracea L.) and water hyacinth ( Eichhornia crassipes (Mart) Solms.) plant leaves by absorption spectra, low temperature steady-state fluorescence spectroscopy and single photon counting measurement under the same conditions. The absorption spectra at room temperature for the spinach and water hyacinth chloroplasts are similar, which show that different plants can efficiently absorb light of same wavelength. The low temperature steady-state fluorescence spectroscopy for the water hyacinth chloroplast reveals a poor balance of photon quantum between two photosystems. The fluorescence decays in PS II measured at the natural QA state for the chloroplasts have been fitted by a three-exponential kinetic model, The slow Lifetime fluorescence component is assigned to a collection of associated light harvesting CW. a/b proteins, the fast Lifetime component to the reaction center of PSII 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 87% and 91% respectively for the water hyacinth and spinach chloroplasts calculated on the 20 ps model. This interesting result is not consistent with what is assumed that the efficiency is 100% in PSII RC. The results in this paper also present a support for the 20 ps electron transfer time constant in PS II RC. On the viewpoint of excitation energy conversion efficiency, the growing rate for the water hyacinth plan is smaller than that for the spinach plant. But, authors' results show those plants can perform highly efficient transfer of photo-excitation energy from the light-harvesting pigment system to the reaction center (approximately 100%). |
| 语种 | 英语 |
| WOS记录号 | WOS:000166156800006 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/76161]  |
| 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, Lab Photosynth Basic Res, Beijing 100093, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xu, SC,Sun, ZY,Ai, XC,et al. Ultrafast spectral studies of the primary processes of photosynthesis in spinach and water hyacinth leaves[J]. ACTA BOTANICA SINICA,2000,42(12):1235-1242. |
| APA | Xu, SC.,Sun, ZY.,Ai, XC.,Feng, J.,Zhang, QY.,...&Kuang, TY.(2000).Ultrafast spectral studies of the primary processes of photosynthesis in spinach and water hyacinth leaves.ACTA BOTANICA SINICA,42(12),1235-1242. |
| MLA | Xu, SC,et al."Ultrafast spectral studies of the primary processes of photosynthesis in spinach and water hyacinth leaves".ACTA BOTANICA SINICA 42.12(2000):1235-1242. |
入库方式： OAI收割
来源：化学研究所
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