Journal
PLANT BIOLOGY
Volume 24, Issue 4, Pages 636-641Publisher
WILEY
DOI: 10.1111/plb.13413
Keywords
Antioxidant system; hydrogen sulphide; oxidative stress; proline metabolism
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Funding
- University Grants Commission, New Delhi, India
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This study investigates the alleviating effect of H2S on hexavalent chromium stress in two cereal crops (wheat and rice). The results show that supplementation with H2S can enhance the tolerance of crops to hexavalent chromium stress.
Chromium pollution in soils is a major threat as it reduces crop yields. Hence, researchers seek methods/strategies which could curtail such losses. We report the role of H2S in alleviating hexavalent chromium [Cr(VI)] stress in two cereals crops, i.e. wheat and rice seedlings, by estimating various physiological attributes. Cr(VI) reduced shoot and root length in both cereals through increased accumulation of Cr(VI) in root tips and increased in oxidative stress markers, i.e. superoxide radicals (SOR), H2O2 and lipid peroxidation (as MDA equivalent). Supplementation with H2S alleviated Cr(VI) toxicity in both cereal crops. Application of H2S increased tolerance to Cr(VI) stress by protecting photosynthesis and enhancing activity of antioxidant enzymes, particularly glutathione-S-transferase and content of proline. Rice was more resistant to Cr(VI) than wheat seedlings.
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