Bacteria of the genus Streptomyces produce chemical substances called arginoketides, to which many other microorganisms react: Bacteria form biofilms, algae join together to form aggregates, and fungi produce signalling substances that they would not otherwise produce triggering new responses from other organisms. Researchers at the Leibniz Institute for Natural Product Research and Infection Biology (Leibniz-HKI) show this in a study, in which they investigated various Streptomyces species, the arginoketides they produce and their influence on other soil microorganisms.