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Biosurfactant-assisted phytoremediation of potentially toxic elements in soil:Green technology for meeting the United Nations Sustainable Development Goals

引用

Pedosphere 2022年第1期32卷 198-210页

作者： Songita SONOWAL amy r.nava Sanket J.JOSHI Siddhartha Narayan BOrAH Nazim F.ISLAM Soumya PANDIT ram PrASAD Hemen SArMA Department of Botany School of Life SciencesMahatma Gandhi Central UniversityMotihari 845401India Department of Molecular&Cellular Physiology Stanford UniversityStanfordCA 94305SA Oil&Gas research Center Central Analytical and Applied Research UnitSultan Qaboos UniversityMuscat 123Oman Centre for the Environment Indian Institute of Technology GuwahatiGuwahati 781039India Institutional Biotech Hub(IBT Hub) Department of BotanyNanda Nath Saikia CollegeTitabar 785630India Department of Life Sciences School of Basic Sciences and ResearchSharda UniversityGreater Noida 201306India

Biosurfactants are biomolecules produced by microorganisms, low in toxicity, biodegradable, and relatively easy to synthesize using renewable waste substrates. Biosurfactants are of great importance with a wide and versatile range of applications, including the bioremediation of contaminated sites. Plants may accumulate soil potentially toxic elements(PTEs), and the accumulation efficacy may be further enhanced by the biosurfactants produced by rhizospheric microorganisms. Occasionally, the growth of bacteria slows down in adverse conditions, such as highly contaminated soils with PTEs. In this context,the plant's phytoextraction capacity could be improved by the addition of metal-tolerant bacteria that produce biosurfactants. Several sources, categories,and bioavailability of PTEs in soil are reported in this article, with the focus on the cost-effective and sustainable soil remediation technologies, where biosurfactants are used as a remediation method. How rhizobacterial biosurfactants can improve PTE recovery capabilities of plants is discussed, and the molecular mechanisms in bacterial genomes that support the production of important biosurfactants are listed. The status and cost of commercial biosurfactant production in the international market are also presented.

关键词： bacterial genome metal-tolerant bacteria phytoextraction technology plant growth-promoting rhizobacteria rhizospheric microorganism

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