DAMPNESS DETECTORS: Neurons expressing receptors responsive to humidity glow green in a structure of the D. melanogaster antenna. LUND UNIVERSITY, ANDERS ENJIN
The paper A. Enjin et al., “Humidity sensing in Drosophila,” Curr Biol, doi:10.1016/j.cub.2016.03.049, 2016. Muggy mystique Scientists have known for decades that insects can sense their environment’s humidity. Fruit flies, for instance, have distinct relative humidity (RH) preferences: a recent study led by Marco Gallio of Northwestern University and Marcus Stensmyr of Lund University showed that a species from the Sonoran desert seeks out drier conditions, whereas an afrotropical species likes it muggy. The next step was to find out how the flies detect RH. Sultry behavior Humidity sensing is thought to occur in the antennae, so the team looked for ionotropic receptors expressed there whose function was unknown. Using mutants and RNAi to disrupt the functioning of any of three such receptors—IR25a, IR93a, and ...
