Abstract
Soil Microbes Soil bacteria produce several earthy and unpleasant-smelling compounds, but for what reason? The filamentous bacterium Streptomyces venezuelae is known to both produce and respond to fishy trimethylamine as a volatile signaling molecule. Jones et al. found that airborne trimethylamine from S. venezuelae reduced growth and survival of other microbes growing nearby. This effect was reversed by iron supplementation, suggesting a role for trimethylamine in making iron less available to competing bacteria, likely by increasing the local pH. S. venezuelae may compensate for the unhospitable environment it has created by secreting iron-chelating compounds to recover recalcitrant iron. mBio 10 , e00171-19 (2019).
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