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- Title
Effect of exogenous potassium on photosynthesis and antioxidant enzymes of rice under iron toxicity.
- Authors
Gao, P.; Zheng, G.; Wu, Y.; Liu, P.
- Abstract
A solution culture experiment was conducted to determine the effects of different potassium concentrations on the chlorophyll fluorescence and oxidation resistance of the Fe-tolerant rice ( Oryza sativa L.) genotype Xieyou 9308 and the Fe-sensitive genotype IIyou 838 exposed to 250 mg/L of Fe. 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 Fe stress decreased. Compared with the control group, chlorophyll content and peroxidase, superoxide dismutase, and catalase activities decreased, whereas MDA content increased under Fe stress. Exogenous K alleviated Fe toxicity in the test subjects compared with the control group. Overall, external K could alleviate the toxic effects of Fe toxicity.
- Subjects
POTASSIUM; PHOTOSYNTHESIS; ANTIOXIDANTS; RICE enzymes; TOXICOLOGY of iron; PLANT growing media; IRON content of plants
- Publication
Russian Journal of Plant Physiology, 2014, Vol 61, Issue 1, p47
- ISSN
1021-4437
- Publication type
Article
- DOI
10.1134/S1021443714010051