Effect of exogenous potassium on photosynthesis and antioxidant enzymes of rice under iron toxicity

Effect of exogenous potassium on photosynthesis and antioxidant enzymes of rice under iron toxicity A solution culture experiment was conducted to determine the effects of different potassium concentrations on the chlorophyll fluorescence and oxidation resistance of the Fe2+-tolerant rice (Oryza sativa L.) genotype Xieyou 9308 and the Fe2+-sensitive genotype IIyou 838 exposed to 250 mg/L of Fe2+. The minimal fluorescence, maximum fluorescence efficiency, maximum fluorescence, and non-photochemical quenching coefficient showed no significant changes. However, the photochemical quenching coefficient increased. Under 200 mg/L K+ concentration, the effects of Fe2+ stress decreased. Compared with the control group, chlorophyll content and peroxidase, superoxide dismutase, and catalase activities decreased, whereas MDA content increased under Fe2+ stress. Exogenous K+ alleviated Fe2+ toxicity in the test subjects compared with the control group. Overall, external K+ could alleviate the toxic effects of Fe2+ toxicity. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Plant Physiology Springer Journals

Effect of exogenous potassium on photosynthesis and antioxidant enzymes of rice under iron toxicity

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Publisher
Springer US
Copyright
Copyright © 2014 by Pleiades Publishing, Ltd.
Subject
Life Sciences; Plant Physiology; Plant Sciences
ISSN
1021-4437
eISSN
1608-3407
D.O.I.
10.1134/S1021443714010051
Publisher site
See Article on Publisher Site

Abstract

A solution culture experiment was conducted to determine the effects of different potassium concentrations on the chlorophyll fluorescence and oxidation resistance of the Fe2+-tolerant rice (Oryza sativa L.) genotype Xieyou 9308 and the Fe2+-sensitive genotype IIyou 838 exposed to 250 mg/L of Fe2+. The minimal fluorescence, maximum fluorescence efficiency, maximum fluorescence, and non-photochemical quenching coefficient showed no significant changes. However, the photochemical quenching coefficient increased. Under 200 mg/L K+ concentration, the effects of Fe2+ stress decreased. Compared with the control group, chlorophyll content and peroxidase, superoxide dismutase, and catalase activities decreased, whereas MDA content increased under Fe2+ stress. Exogenous K+ alleviated Fe2+ toxicity in the test subjects compared with the control group. Overall, external K+ could alleviate the toxic effects of Fe2+ toxicity.

Journal

Russian Journal of Plant PhysiologySpringer Journals

Published: Dec 28, 2013

References

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