for Chemical Ecology in Jena, Germany, have now taken a closer look at the olfactory system of wingless insects, which − in evolutionary terms − are older than winged insects: the jumping bristletail Lepismachilis y-signata
and the firebrat Thermobia domestica
, which are both wingless, as well as the leaf insect Phyllium siccifolium
, which is winged and was used as a control. As all three studied insect species emerged at different times in insect evolution, the scientists wanted to track the historical development of olfactory receptors.
Christine Mibach, first author of the study, analyzed the active genes in the insect antennae where the olfactory receptors are located and describes her discovery this way: "Astonishingly, the firebrat, which is more closely related to flying insects, employs several co-receptors, while the odorant receptors themselves are absent."
However, the researchers did not find any evidence for an olfactory system which is based on odorant receptors in the most basal insect, the jumping bristletail.
"According to these findings, the receptor family which is important for olfaction in recent insects evolved long after the migration of insects from water to land," Ewald Groe-Wilde summarizes. The researchers are convinced that the main olfactory receptors evolved independently of the co-receptor long after insects had adapted to terrestrial life. They hope that further analyses will reveal why some insect species have only co-receptors, no main receptors, and also clarify the function these co-receptors have on their own. [AO]
Page: 1 2 Related biology news :1
. First look at breast microbiota raises tantalizing questions2
. Worlds first light-activated antimicrobial surface that also works in the dark3
. First International Agroforestry Congress in the Philippines4
. First evidence of plants evolving weaponry to compete in the struggle for selection5
. UChicago and MBL announce first recipients of Lillie Awards for Collaborative Research6
. First animals oxygenated the ocean, study suggests7
. First look at how Staphylococcus cells adhere to nanostructures could help fight infections8
. Research reveals first glimpse of brain circuit that helps experience to shape perception9
. First-of-its-kind web portal to bolster research and treatment for rare diseases10
. First biological marker for major depression could enable better diagnosis and treatment11
. First-ever book on Mekong rattan species aims to promote sustainable practices