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Tenebrio Molitor: Possible Source of Polystyrene-Degrading Bacteria
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Researchers isolated bacteria from the gut of mealworm beetles (Tenebrio molitor) capable of degrading polystyrene, a persistent plastic waste product. The study identified and characterized these bacteria as a potential biological approach to managing polystyrene pollution.
Abstract Background : The excessive use of polystyrene as a packaging material has resulted in a rise in environmental pollution. Polystyrene waste has continually increased water pollution, soil pollution and the closing of landfill sites since it is durable and resistant to biodegradation. Therefore, the challenge in polystyrene disposal has caused researchers to look for urgent innovative and eco-friendly solutions for plastic degradation. The current study focuses on the isolation and identification of bacteria produced by the larvae of beetle Tenebrio molitor (yellow mealworms), that enable them to survive when fed with polystyrene foam as their sole carbon diet. Materials and methods: The biodegradation of polystyrene by Tenebrio molitor was investigated by breeding and rearing the mealworms in the presence and absence of polystyrene. A comparison was made between those fed with a normal diet and those fed on polystyrene. The mealworms which were fed with polystyrene were then dissected and the guts were collected to isolate and identify the bacteria in their guts. The viability and metabolic activity of the isolates were investigated. The polymerase chain reaction (PCR) followed by sequencing was used for molecular identification of the isolates. The PCR products were directly sequenced using the Sanger’s method and the phylogenetic tree and molecular evolutionary analyses were constructed using MEGAX software with the Neighbour Joining algorithm. The evolutionary distances were computed using the Maximum Composite Likelihood method. Results: The decrease in mass of the polystyrene as feedstock confirmed that the mealworms were depending on polystyrene as their sole carbon diet. The frass egested by mealworms also confirmed the biodegradation of polystyrene as it contained very tiny residues of polystyrene. Three isolates were obtained from the mealworms guts, and all were found to be gram-negative. The sequencing results showed that the isolates were Klebsiella oxytoca ATCC 13182, Klebsiella oxytoca NBRC 102593 and Klebsiella oxytoca JCM 1665. Conclusion: Klebsiella oxytoca ATCC 13182, Klebsiella oxytoca NBRC 102593 and Klebsiella oxytoca JCM 1665 maybe some of the bacteria responsible for polystyrene biodegradation.
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Tenebrio molitor: possible source of polystyrene-degrading bacteria
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Researchers identified that Klebsiella oxytoca bacteria, found in the gut of mealworm beetles (Tenebrio molitor), may be key players in breaking down polystyrene plastic, pointing to insects as a potential source of microbe-based plastic biodegradation solutions.
Isolation of Plastic Digesting Microbes from the Gastrointestinal Tract of Tenebrio Molitor
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Researchers isolated bacteria from the gut of Tenebrio molitor mealworm larvae that are capable of degrading polystyrene and polyethylene microplastics. The identified gut microbes showed plastic-degrading enzymatic activity, suggesting potential for bioremediation applications.
Biodegradation of polystyrene by intestinal symbiotic bacteria isolated from mealworms, the larvae of Tenebrio molitor
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This study found that the gut microbiome of mealworm larvae (Tenebrio molitor) harbors a diverse community of polystyrene-degrading bacteria, suggesting that intestinal symbionts of these insects could be harnessed as a biological strategy for breaking down one of the world's most persistent plastic pollutants.
Biodegradation of Polystyrene by Plastic-Eating Tenebrionidae Larvae
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Researchers examined the biodegradation of polystyrene by Tenebrionidae beetle larvae, testing the ability of plastic-eating mealworm larvae to break down the highly stable, hydrophobic polymer. The study characterized polymer molecular weight changes, gut microbiome contributions, and metabolic byproducts, demonstrating that larval gut bacteria play a key role in PS depolymerization.
Ubiquity of polystyrene digestion and biodegradation within yellow mealworms, larvae of Tenebrio molitor Linnaeus (Coleoptera: Tenebrionidae)
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Scientists worldwide found that mealworms (the larvae of a common beetle) can actually eat and break down polystyrene foam, the plastic used in disposable cups and packaging, thanks to bacteria living in their gut. This happens consistently no matter where the mealworms come from, suggesting this plastic-eating ability is a built-in trait of the species, not a fluke. While this doesn't directly reduce your personal microplastic exposure today, it points toward promising future tools for tackling plastic waste, which could help curb the amount of plastic pollution that eventually breaks down into the microplastics found in our food, water, and even
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