Singh S K, Husain T, Suhel M, Prasad S M, Singh V P
Ranjan Plant Physiology and Biochemistry Laboratory, Department of Botany, University of Allahabad, Prayagraj, India.
Plant Physiology Laboratory, Department of Botany, C.M.P. Degree College, University of Allahabad, Prayagraj, India.
Plant Biol (Stuttg). 2022 Jun;24(4):636-641. doi: 10.1111/plb.13413. Epub 2022 Apr 6.
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 H S 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), H O and lipid peroxidation (as MDA equivalent). Supplementation with H S alleviated Cr(VI) toxicity in both cereal crops. Application of H S 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.
土壤中的铬污染是一个重大威胁，因为它会降低作物产量。因此，研究人员寻求能够减少此类损失的方法/策略。我们通过评估各种生理特性，报告了硫化氢在减轻两种谷类作物（即小麦和水稻幼苗）中六价铬[Cr(VI)]胁迫方面的作用。Cr(VI)通过增加根尖中Cr(VI)的积累以及氧化应激标志物（即超氧自由基（SOR）、H₂O₂和脂质过氧化（以丙二醛当量计））的增加，降低了两种谷类作物的地上部和根部长度。补充硫化氢减轻了两种谷类作物中的Cr(VI)毒性。施用硫化氢通过保护光合作用和增强抗氧化酶（特别是谷胱甘肽-S-转移酶）的活性以及脯氨酸含量，提高了对Cr(VI)胁迫的耐受性。水稻比小麦幼苗对Cr(VI)更具抗性。
