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Biological Degradation of Polyethylene Terephthalate by Rhizobacteria
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Researchers isolated rhizobacteria — bacteria associated with plant roots — that can biodegrade polyethylene terephthalate (PET) plastic. This finding suggests that soil bacteria near plants may contribute to plastic breakdown in contaminated soils, though degradation rates remain slow.
Abstract In view of growing demand of plastic products, an enormous proportion of plastic waste causing the biological issue is produced. Plants in collaboration with their rhizobacteria partners are also exposed to these contaminants. The aim of the study is to determine the rhizobacterial ability to biodegrade polyethylene terephthalate (PET) plastic. We isolated the rhizobacteria capable of degrading the PET plastic in minimal salt media using it as a sole carbon source. The three rhizospheric isolates namely Priestia aryabhattai VT 3.12 (GenBank accession No. OK135732.1), Bacillus pseudomycoides VT 3.15 (GenBank accession No. OK135733.1), and Bacillus pumilus VT 3.16 (GenBank accession No. OK1357324.1) showed the highest degradation percentage for PET sheet and powder. The biodegradation end products post 28 days for PET sheet and 18 days of PET powder were studied by FTIR, HPLC, and SEM, respectively. Our results showed significant biodegradation of PET plastic and the rate of degradation could account to over 65%. The present study proves soil rhizobacteria's potential and capabilities for efficient degradation of PET plastic occurring at the waste sites. It also implies that rhizobacteria could be beneficial in the remediation of PET waste in future applications.
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Scientists found bacteria living in plastic-polluted soil in India that can actually break down PET plastic (the type used in water bottles and food packaging). This matters because PET plastic pollution is a major source of the microplastics now found in our food, water, and even our bodies — and these natural bacteria could eventually help clean up plastic waste before it breaks down into the tiny particles that pose health risks.
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When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.