Navigation Links
The first insects were not yet able to smell well
Date:3/27/2014

This news release is available in German.

An insect's sense of smell is vital to its survival. Only if it can trace even tiny amounts of odor molecules is it is able to find food sources, communicate with conspecifics, or avoid enemies. According to scientists at the Max Planck Institute for Chemical Ecology in Jena, Germany, many proteins involved in the highly sensitive odor perception of insects emerged rather late in the evolutionary process. The very complex olfactory system of modern insects is therefore not an adaptation to a terrestrial environment when ancient insects migrated from water to land, but rather an adaptation that appeared when insects developed the ability to fly. The results were published in the Open Access Journal eLife (eLife, March 26, 2014, doi: 10.7554/elife.02115)

Many insect species employ three families of receptor proteins in order to perceive thousands of different environmental odors. Among them are the olfactory receptors. They form a functional complex with another protein, the so-called olfactory receptor co-receptor, which enables insects to smell the tiniest amounts of odor molecules in their environment very rapidly.

Crustaceans and insects share a common ancestor. Since crustaceans do not have olfactory receptors, previously scientists assumed that these receptors evolved as an adaptation of prehistoric insects to a terrestrial life. This hypothesis is also based on the assumption that for the ancestors of recent insects, the ability to detect odor molecules in the air rather than dissolved in water was of vital importance.

Early research on insect olfactory receptors focused entirely on insects with wings. Ewald Groe-Wilde and Bill S. Hansson and their colleagues from the Max Planck Institute 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]


'/>"/>
Contact: Ewald Große-Wilde
grosse-wilde@ice.mpg.de
49-364-157-1408
Max Planck Institute for Chemical Ecology
Source:Eurekalert  

Related biology news :

1. First look at breast microbiota raises tantalizing questions
2. Worlds first light-activated antimicrobial surface that also works in the dark
3. First International Agroforestry Congress in the Philippines
4. First evidence of plants evolving weaponry to compete in the struggle for selection
5. UChicago and MBL announce first recipients of Lillie Awards for Collaborative Research
6. First animals oxygenated the ocean, study suggests
7. First look at how Staphylococcus cells adhere to nanostructures could help fight infections
8. Research reveals first glimpse of brain circuit that helps experience to shape perception
9. First-of-its-kind web portal to bolster research and treatment for rare diseases
10. First biological marker for major depression could enable better diagnosis and treatment
11. First-ever book on Mekong rattan species aims to promote sustainable practices
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
The first insects were not yet able to smell well
(Date:4/5/2017)... 2017  The Allen Institute for Cell Science today ... one-of-a-kind portal and dynamic digital window into the human ... first application of deep learning to create predictive models ... and a growing suite of powerful tools. The Allen ... future publicly available resources created and shared by the ...
(Date:4/4/2017)... April 4, 2017   EyeLock LLC , a ... the United States Patent and Trademark Office (USPTO) has ... the linking of an iris image with a face ... represents the company,s 45 th issued patent. ... very timely given the multi-modal biometric capabilities that have ...
(Date:3/30/2017)... , March 30, 2017 The research ... system for three-dimensional (3D) fingerprint identification by adopting ground breaking 3D ... a new realm of speed and accuracy for use in identification, ... an affordable cost. ... ...
Breaking Biology News(10 mins):
(Date:8/16/2017)... Ca (PRWEB) , ... August 16, 2017 , ... ... by changing into a different cell type. Many treatments for specific cancers, such ... prominent example of targeted treatment is androgen deprivation therapy for advanced prostate cancer. ...
(Date:8/16/2017)... , Aug. 16, 2017  This year,s edition of the Inc. ... in life sciences workforce solutions, has made the list for the third ... recognizes the nation,s fastest-growing private companies based on a set of quantitative ... which includes the fastest-growing companies in the Bay State ... Inc. 5000 ...
(Date:8/15/2017)... ... August 15, 2017 , ... Nanomedical ... and biotherapeutics development, announces the launch of the new NHS Agile biosensor ... kinetic binding data for a wide range of molecules, including small and large ...
(Date:8/15/2017)... ... August 15, 2017 , ... The Conference Forum and The ... through a series of upcoming panels and events. The partnership culminates with the ... Hotel in New York City. , “With our experience in producing the Immuno-Oncology 360° ...
Breaking Biology Technology: