Research Keyword: chemotaxis

Biodegradation of BTEX by Bacteria Isolated From Soil Contaminated With Petroleum Sludge and Liquid and Solid Petrochemical Effluents

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Scientists isolated bacteria from oil-contaminated soil that can effectively break down BTEX chemicals, which are toxic pollutants from petroleum products. Two bacterial strains, Arthrobacter pascens and Bacillus sp., proved most effective at degrading these harmful compounds, removing over 80% within 12 days. These findings suggest these bacteria could be used to clean up contaminated sites naturally and cost-effectively.

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Movement of bacteria in the soil and the rhizosphere

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Bacteria in soil move in many different ways to find food and avoid danger. Some swim using tiny whip-like flagella, others slide across surfaces, and many hitch rides on fungi or get transported by tiny predatory organisms. The ways bacteria move depend heavily on soil moisture, pore structure, and interactions with other microorganisms. This movement affects nutrient cycling and soil productivity, making it important for agriculture and ecosystem health.

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Legume-specific recruitment of rhizobia by hyphae of arbuscular mycorrhizal fungi

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Underground fungal networks connect different legume plants and act like sophisticated GPS systems for helpful bacteria. These fungi transport chemical signals (flavonoids) from plant roots along their hyphae, guiding specific types of nitrogen-fixing bacteria to their correct host plants. This discovery shows how fungi help bacteria find the right plants to form symbiotic partnerships, improving natural nitrogen fixation and potentially reducing the need for chemical fertilizers in agriculture.

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Movement of bacteria in the soil and the rhizosphere

mycolabadmin

Bacteria in soil move around using several different strategies to find nutrients and colonize new areas. They can swim using whip-like flagella, hitchhike on fungal networks or other microbes, or get transported by predatory organisms like nematodes. These different movement mechanisms help bacteria spread through soil at varying speeds and distances, which affects how soil communities are structured and function.

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