title: [The influence of temperature on the orientation of pigments in PS II].
abstract: The effect of temperature on the orientation of pigment in PSII was studied by the fluorescence excitation spectra and polarization fluorescence spectra of spinach thylakoid solution. The experimental results showed that in the temperature range of 15-45 degrees C the absorption band of chl a at 436 nm at room temperature red-shifted with increasing temperature. The excitation spectra intensity reached the maximum at the temperature of 35 degrees C, but greatly reduced with temperature at 65 and 78 degrees C. In the polarization fluorescence spectra the fluorescence peak of PSII didn't change with temperature from 15 to 45 degrees C. It was also found that the calculated fluorescence polarization degree increased with the temperature in the entire temperature range. The analysis indicated that temperature would affect the orientation of the pigments in PSII and the coupling strength between pigments so to change photosynthetic efficiency. The results will give a certain reference for the study of the energy absorption and transmission, regulation mechanism and also on solar cell materials.
authors.forename: Li-Ping
authors.initials: LP
authors.lastname: Lu
authors.forename: Liang-Shu
authors.initials: LS
authors.lastname: Wei
authors.forename: Xiao-Sen
authors.initials: XS
authors.lastname: Luo
authors.forename: Xiao-Wu
authors.initials: XW
authors.lastname: Ni
authors.forename: Jian
authors.initials: J
authors.lastname: Lu
mesh_terms: D002734:Chlorophyll / Q000737:chemistry*; D005453:Fluorescence; D010788:Photosynthesis; D045332:Photosystem II Protein Complex / Q000737:chemistry*; D013050:Spectrometry, Fluorescence; D018724:Spinacia oleracea / Q000737:chemistry; D013696:Temperature
chemical_list: D045332:Photosystem II Protein Complex; D002734:Chlorophyll