期刊
RADIATION PHYSICS AND CHEMISTRY
卷 78, 期 1, 页码 25-32出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.radphyschem.2008.07.006
关键词
Chlorophyll; Thylakoids; UV-irradiation; Fluorescence; Bleaching; Kinetics
资金
- Project on Development of Technology and Products of Pharmaceutical and Cosmetic Industry [TR-6708B, 143020B, 143016B]
- Ministry of Science of Republic of Serbia
Chlorophyll bleaching by UV-irradiation has been studied by absorbance and fluorescence spectroscopy in extracts containing mixtures of photosynthetic pigments, in acetone and n-hexane solutions, and in aqueous thylakoid suspensions. Chlorophyll undergoes destruction (bleaching) accompanied by fluorescent transient formation obeying first-order kinetics. The bleaching is governed by UV-photon energy input, as well as by different chlorophyll molecular organizations in solvents of different polarities (in vitro), and in thylakoids (in situ). UV-C-induced bleaching of chlorophylls in thylakoids is probably caused by different mechanisms compared to UV-A- and UV-B-induced bleaching. (C) 2008 Elsevier Ltd. All rights reserved.
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