Evaluation of the Bioremediation Potential of Staphlococcus lentus Inoculations of Plants as a Promising Strategy Used to Attenuate Chromium Toxicity

Nuzhat Jamil, Sajjad Hyder, Mohammad Valipour (), Muhammad Yasir (), Rashid Iqbal, Rana Roy, Muhammad Umar Zafar and Ambreen Ahmed
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Nuzhat Jamil: Department of Botany, Quaid-e Azam Campus, University of the Punjab, Lahore 54590, Pakistan
Sajjad Hyder: Department of Botany, Government College Women University Sialkot, Sialkot 51310, Pakistan
Mohammad Valipour: Department of Engineering and Engineering Technology, Metropolitan State University of Denver, Denver, CO 80217, USA
Muhammad Yasir: Department of Chemistry, The University of Lahore, Lahore 54000, Pakistan
Rashid Iqbal: Department of Agronomy, Faculty of Agriculture and Environment, The Islamia University of Bahawalpur, Bahawalpur 63100, Pakistan
Rana Roy: Department of Agroforestry and Environmental Science, Sylhet Agricultural University, Sylhet 3100, Bangladesh
Muhammad Umar Zafar: Department of Agronomy, Faculty of Agriculture and Environment, The Islamia University of Bahawalpur, Bahawalpur 63100, Pakistan
Ambreen Ahmed: Department of Botany, Quaid-e Azam Campus, University of the Punjab, Lahore 54590, Pakistan

Sustainability, 2022, vol. 14, issue 20, 1-12

Abstract: Current industrial developments, advanced farming techniques, and further anthropogenic activities are adding substantial amounts of heavy metals into the ecosystem and having dangerous effects on lifeforms, including plants and animals, and changing their biological activities. Decontamination following the heavy metal contamination is an important point deserving attention in the current scenario. Among all the other approaches used for this purpose, bioremediation is ecofriendly and green approach that can be used to remediate heavy metal toxicity. In plant cells, the regulation of ionic homeostasis is a primary physiological prerequisite for upholding plant development, growth, and production. To avoid the dreadful effects of toxic heavy metal exposure, plants manifest physiological, biochemical, and structural responses. In the present research, we reported on the isolation and molecular identification of an effective heavy-metal-tolerant bacterial strain, Staphylococcus lentus (E3), having a minimum inhibitory concentration of 300 µg/mL for chromium, Cr, taken from soil polluted with industrial effluents at Kasur, Pakistan. Bacterial inoculations enhanced all the growth parameters of Triticum aestivum and Helianthus annus . To observe the physiological strain, the proline content and peroxidase (POD) activities were estimated under Cr stress in the bacterial-inoculated plants. The chlorophyll content and Cr uptake in the aerial parts the of plants were also studied, along with the overexpression of proteins. The bacterial inoculations produced encouraging results. Bioremediation using PGPR is an efficient, convincing, and reliable approach to attenuating heavy metal toxicity.

Keywords: bacterial inoculants; bioremediation; heavy metal stress; chromium toxicity; Triticum aestivum; Helianthus annus; Staphylococcus lentus (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
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