Overview
Scientists at VIB and Vrije Universiteit Brussel identified an uncharacterized mechanism that contributes to the enhanced efficacy of a widely employed biological pesticide. The discovery, detailed in Nature Communications, describes how specific bacteria generate ultra-strong protein fibers. These fibers coalesce to form a molecular net, effectively immobilizing infectious spores and toxins within a cohesive film, which subsequently amplifies their capacity to exterminate insect pests.
Research Context
The study specifically investigated mechanisms underlying the effectiveness of a natural biopesticide. This biopesticide's action involves bacteria producing protein fibers that form a molecular net. The function of this net is to ensnare infectious spores and toxins. This process results in the formation of a sticky film, which is implicated in boosting the biopesticide's ability to kill insect pests.
Findings
The research uncovered that bacteria involved in the biopesticide mechanism produce robust protein fibers. These fibers are responsible for the formation of a molecular net. The primary role of this molecular net is to trap infectious spores and toxins. The aggregated spores and toxins, once trapped, form a sticky film. This sticky film was observed to enhance the biopesticide's ability to kill insect pests.
The mechanism described represents a previously unknown aspect of how this natural biopesticide functions. The protein fibers themselves are characterized as 'ultra-strong'. The aggregation of these components into a 'molecular net' and subsequently a 'sticky film' appears central to the observed increase in insecticidal power.