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Phyto-Toxicity of Chromium in Maize: Oxidative Damage, Osmolyte Accumulation, Anti-Oxidative Defense and Chromium Uptake

文献类型： 外文期刊

作者： Anjum, Shakeel Ahmad 1 ; Ashraf, Umair 3 ; Khan, Imran 2 ; Tanveer, Mohsin 5 ; Shahid, Muhammad 2 ; Shakoor, Abdul; 1 ;

作者机构： 1.Southwest Univ, Coll Agron & Biotechnol, Minist Educ, Engn Res Ctr South Upland Agr, Chongqing 400716, Peoples R China

2.Univ Agr Faisalabad, Dept Agron, Faisalabad 38040, Pakistan

3.South China Agr Univ, Dept Crop Sci & Technol, Coll Agr, Guangzhou 510642, Guangdong, Peoples R China

4.Minist Agr, Sci Observing & Expt Stn Crop Cultivat South Chin, Guangzhou 510642, Guangdong, Peoples R China

5.Univ Tasmania, Sch Land & Food, Hobart, Tas 7005, Australia

关键词： agronomic characteristics;anti-oxidative enzyme activity;Cr accumulation;Cr translocation;heavy metal stress;reactive oxygen species

期刊名称：PEDOSPHERE （ 影响因子：3.911； 五年影响因子：4.814 ）

ISSN： 1002-0160

年卷期： 2017 年 27 卷 2 期

页码：

收录情况： SCI

摘要： Agricultural production systems are immensely exposed to different environmental stresses in which heavy metal stress receives serious concerns. This study was conducted to explore the deleterious effects of different chromium (Cr) stress levels, i.e., 0, 30, 60, 90, 120, and 150 mu mol L-1, on two maize genotypes, Wandan 13 and Runnong 35. Both genotypes were evaluated by measuring their growth and yield characteristics, Cr accumulation in different plant tissues, alterations in osmolyte accumulation, generation of reactive oxygen species (ROS), and anti-oxidative enzyme activity to scavenge ROS. The results showed that Cr stress decreased the leaf area, cob formation, 100-grain weight, shoot fresh biomass, and yield formation, while Cr accumulation in different maize tissues was found in the order of roots > leaves > stem > seeds in both genotypes. The increased Cr toxicity resulted in higher free proline, soluble sugars and total phenolic contents, and lower soluble protein contents. However, enhanced lipid peroxidation was noticed in the forms of malondialdehyde, hydrogen peroxide (H(2)0(2)) and thiobarbituric acid reactive substance accumulation, and electrolyte leakage. The hyperactivity of superoxide dismutase, peroxidase, catalase, ascorbate peroxidase, especially glutathione peroxidase and glutathione reductase indicated that these anti-oxidative enzymes had a central role in protecting maize from Cr toxicity, especially for Wandan 13. Moreover, higher uptake and less translocation of Cr contents into the grains of Wandan 13 implied its importance as a potential candidate against soil Cr pollution.

  • 相关文献

[1]Aluminum and Chromium Toxicity in Maize: Implications for Agronomic Attributes, Net Photosynthesis, Physio-Biochemical Oscillations, and Metal Accumulation in Different Plant Parts. Anjum, Shakeel Ahmad,Wang, Longchang,Anjum, Shakeel Ahmad,Wang, Longchang,Anjum, Shakeel Ahmad,Wang, Longchang,Anjum, Shakeel Ahmad,Khan, Imran,Saleem, Muhammad Farrukh,Ashraf, Umair,Ashraf, Umair,Tanveer, Mohsin.

[2]High concentrations of genistein exhibit pro-oxidant effects in primary muscle cells through mechanisms involving 5-lipoxygenase-mediated production of reactive oxygen species. Lin, Ying Cai.

[3]Knockout of SOD1 alters murine hepatic glycolysis, gluconeogenesis, and lipogenesis. Wang, Li,Lei, Xin Gen,Wang, Li,Jiang, Zongyong.

[4]Kinetic Modeling of the Electro-Fenton Process: Quantification of Reactive Oxygen Species Generation. Qiu, Shan,He, Di,Waite, T. David,Ma, Jinxing,Liu, Tongxu.

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