Spring Ephemerals Adapt to Extremely High Light Conditions via an Unusual Stabilization of Photosystem II

Frontiers in Plant Science
Wenfeng TuChunhong Yang

Abstract

Ephemerals, widely distributed in the Gobi desert, have developed significant characteristics to sustain high photosynthetic efficiency under high light (HL) conditions. Since the light reaction is the basis for photosynthetic conversion of solar energy to chemical energy, the photosynthetic performances in thylakoid membrane of the spring ephemerals in response to HL were studied. Three plant species, namely two C3 spring ephemeral species of Cruciferae: Arabidopsis pumila (A. pumila) and Sisymbrium altissimum (S. altissimum), and the model plant Arabidopsis thaliana (A. thaliana) were chosen for the study. The ephemeral A. pumila, which is genetically close to A. thaliana and ecologically in the same habitat as S. altissimum, was used to avoid complications arising from the superficial differences resulted from comparing plants from two extremely contrasting ecological groups. The findings manifested that the ephemerals showed significantly enhanced activities of photosystem (PS) II under HL conditions, while the activities of PSII in A. thaliana were markedly decreased under the same conditions. Detailed analyses of the electron transport processes revealed that the increased plastoquinone pool oxidization, together with the...Continue Reading

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Citations

Jan 19, 2020·The Plant Journal : for Cell and Molecular Biology·Beatriz Fernández-MarínJorge Gago
Mar 19, 2019·Biochimica Et Biophysica Acta. Bioenergetics·Sam Wilson, Alexander V Ruban

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Methods Mentioned

BETA
Infrared Imaging
Fluorescence

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