The effects of exogenous cerium on photosystem II as probed by in vivo chlorophyll fluorescence and lipid production of Scenedesmus obliquus XJ002

2020 ◽  
Author(s):  
Jie Cheng ◽  
Xiongyan Du ◽  
Huayang Long ◽  
Han Zhang ◽  
Xiang Ji
Keyword(s):  
Chlorophyll Fluorescence ◽  
Photosystem Ii ◽  
Lipid Production ◽  
Scenedesmus Obliquus ◽  
In Vivo Chlorophyll Fluorescence

Effects of Artemisinin on Photosystem II Performance of Microcystis aeruginosa by In Vivo Chlorophyll Fluorescence

2012 ◽  
Vol 89 (6) ◽  
pp. 1165-1169 ◽  
Author(s):  
Lixiao Ni ◽  
Kumud Acharya ◽  
Xiangyang Hao ◽  
Shiyin Li ◽  
Yong Li ◽  
...  
Keyword(s):  
Chlorophyll Fluorescence ◽  
Photosystem Ii ◽  
Microcystis Aeruginosa ◽  
In Vivo Chlorophyll Fluorescence

Changes of Excitation Spectra of in vivo Chlorophyll Fluorescence during Induction of Photosynthesis

1993 ◽  
Vol 48 (1-2) ◽  
pp. 46-51 ◽  
Author(s):  
Wieslaw I. Gruszecki ◽  
Zbigniew Krupa
Keyword(s):  
Energy Transfer ◽  
Chlorophyll Fluorescence ◽  
Quantum Yield ◽  
Dark Adaptation ◽  
Fluorescence Quantum Yield ◽  
Excitation Energy Transfer ◽  
Reaction Centers ◽  
Excitation Spectra ◽  
In Vivo Chlorophyll Fluorescence

Excitation spectra of chlorophyll fluorescence from intact rye leaves were registered at different steps of the induction of photosynthesis after dark adaptation. Analysis of these spectra indicates that at least two processes related to spectroscopic features are responsible for a fluorescence quenching. The first one, active during the first 100 s of illumination, was interpreted to consists in an overall decrease of the fluorescence quantum yield of antenna pigments and chlorophylls, in particular close to the reaction centers. The second type of a fluorescence decrease (between 100 s and 300 s of illumination) was found to be in large extent related to decrease of the rate of an excitation energy transfer between accessory xanthophyll pigments and chlorophylls emitting fluorescence. This latter molecular mechanism is discussed as being related to violaxanthin availability to de-epoxidation in the xanthophyll cycle.

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