Application of Cerium Dioxide Nanoparticles and Chromium-Resistant Bacteria Reduced Chromium Toxicity in Sunflower Plants

Frontiers in Plant Science

卷:13

Yasmeen A. Alwasel¹  Mohammad K. Okla¹  Huda Alshaya²  Muhammad Adrees³  Afzal Hussain⁴  Salma Hameed⁵  Munazzam Jawad Shahid⁵  Fu Chen⁶  Jing Ma⁷ 

[1] Botany and Microbiology Department, College of Science, King Saud University, Riyadh, Saudi Arabia;

[2] Cell and Molecular Biology Program, University of Arkansas, Fayetteville, NC, United States;

[3] Department of Environmental Science and Engineering, Government College University Faisalabad, Faisalabad, Pakistan;

[4] Department of Environmental Sciences, The University of Lahore, Lahore, Pakistan;

[5] Department of Environmental Sciences, University of Jhang, Jhang, Pakistan;

[6] Engineering Research Center of Ministry of Education for Mine Ecological Restoration, China University of Mining and Technology, Xuzhou, China;

[7] School of Public Administration, Hohai University, Nanjing, China;

关键词: bacteria;    chromium;    nanoparticles;    phytoremediation;    sunflower;   

DOI  :  10.3389/fpls.2022.876119

来源: DOAJ

【 摘 要 】

The continuous increase in the heavy metals concentration in the soil due to anthropogenic activities has become a global issue. The chromium, especially hexavalent chromium, is highly toxic for living organisms due to high mobility, solubility, and carcinogenic properties. Considering the beneficial role of nanoparticles and bacteria in alleviating the metal stress in plants, a study was carried out to evaluate the role of cerium dioxide (CeO2) nanoparticles (NPs) and Staphylococcus aureus in alleviating the chromium toxicity in sunflower plants. Sunflower plants grown in chromium (Cr) contaminated soil (0, 25, and 50 mg kg−1) were treated with CeO2 nanoparticles (0, 25, and 50 mg L−1) and S. aureus. The application of Cerium Dioxide Nanoparticles (CeO2 NPs) significantly improved plant growth and biomass production, reduced oxidative stress, and enhanced the enzymatic activities in the sunflower plant grown under chromium stress. The application of S. aureus further enhanced the beneficial role of nanoparticles in alleviating metal-induced toxicity. The maximum improvement was noted in plants treated with both nanoparticles and S. aureus. The augmented application of CeO2 NPs (50 mg l−1) at Cr 50 mg kg−1 increased the chl a contents from 1.2 to 2.0, chl b contents 0.5 to 0.8 and mg g−1 FW, and decreased the leakage of the electrolyte from 121 to 104%. The findings proved that the application of CeO2 nanoparticles and S. aureus could significantly ameliorate the metal-induced stress in sunflower plants. The findings from this study can provide new horizons for research in the application of nanoparticles in phytoremediation and bioremediation.

【 授权许可】

Unknown