Photosystem II photochemistry and photosynthetic pigment composition in salt-adapted halophyte Artimisia anethifolia grown under outdoor conditions

Journal of Plant Physiology
Congming LuT Kuang

Abstract

The effects of high salinity (0-400 mmol/L NaCl) on photosystem II (PSII) photochemistry and photosynthetic pigment composition were investigated in the halophyte Artimisia anethifolia grown under outdoor conditions and exposed to full sunlight. High salinity resulted in an inhibition in plant growth and a significant accumulation of sodium and chloride in leaves. However, high salinity induced no effects on the actual PSII efficiency, the efficiency of excitation energy capture by open PSII reaction centres, photochemical quenching, and non-photochemical quenching at midday. High salinity also induced neither changes in the maximum efficiency of PSII photochemistry, the efficiency with which a trapped exciton can move an electron into the electron transport chain further than QA and the quantum yield of electron transport beyond QA, nor changes in absorption, trapping and electron transport fluxes per PSII reaction centre. No significant changes were observed in the levels of neoxanthin, lutein, beta-carotene, violaxanthin, antheraxanthin, and zeaxanthin expressed on a total chlorophyll basis in salt-adapted plants. Our results suggest that Artimisia anethifolia showed high resistance not only to high salinity, but also to pho...Continue Reading

References

Jun 1, 1996·Annual Review of Plant Physiology and Plant Molecular Biology·P. HortonR. G. Walters
Aug 1, 1989·Plant Physiology·G Bongi, F Loreto
Mar 1, 1990·Photosynthesis Research·S S Thayer, O Björkman
Sep 1, 1990·Photosynthesis Research·O van Kooten, J F Snel

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Citations

Feb 9, 2016·Plant Physiology and Biochemistry : PPB·Martin StefanovEmilia L Apostolova
Jun 26, 2020·Frontiers in Plant Science·Kamal KhadkaAlireza Navabi

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