Animals often house substantial microbial populations within their bodies. While in some cases the microorganisms are necessary for host survival or reproduction, in the preponderance of cases they are not. It is of great interest to understand whether facultative associations with microorganisms ever benefit the host in lesser ways. Previously, a facultative symbiont was identified in pea aphid which was associated with host plant specialization - there was a dramatic increase in fecundity on clover, coupled with failure to survive on alfalfa.
In a study by Leonardo in the June issue of Ecology Letters, antibiotic treatment was used to selectively remove the specialization-associated symbiont, and found that the aphids remained specialized in its absence. In combination with genetic data presented in the paper, this implies that the aphid, rather than symbiont, genome is responsible for causing the observed specialization. Specialization is symbiont associated because closely related aphids tend to share the same symbionts. Interestingly, other recent work (Science 303: 1989) has found that this same symbiont increased aphid fecundity on clover when injected into a novel host lineage. Together, these experiments suggest the symbiont may have played an initial role in host plant specialization, but that it is no longer necessary for maintaining specialization in some parts of the aphids range.
Kate Stinchcombe | alfa
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University of Maryland researchers contribute to historic detection of gravitational waves and light created by event
On August 17, 2017, at 12:41:04 UTC, scientists made the first direct observation of a merger between two neutron stars--the dense, collapsed cores that remain...
Seven new papers describe the first-ever detection of light from a gravitational wave source. The event, caused by two neutron stars colliding and merging together, was dubbed GW170817 because it sent ripples through space-time that reached Earth on 2017 August 17. Around the world, hundreds of excited astronomers mobilized quickly and were able to observe the event using numerous telescopes, providing a wealth of new data.
Previous detections of gravitational waves have all involved the merger of two black holes, a feat that won the 2017 Nobel Prize in Physics earlier this month....
Material defects in end products can quickly result in failures in many areas of industry, and have a massive impact on the safe use of their products. This is why, in the field of quality assurance, intelligent, nondestructive sensor systems play a key role. They allow testing components and parts in a rapid and cost-efficient manner without destroying the actual product or changing its surface. Experts from the Fraunhofer IZFP in Saarbrücken will be presenting two exhibits at the Blechexpo in Stuttgart from 7–10 November 2017 that allow fast, reliable, and automated characterization of materials and detection of defects (Hall 5, Booth 5306).
When quality testing uses time-consuming destructive test methods, it can result in enormous costs due to damaging or destroying the products. And given that...
Using a new cooling technique MPQ scientists succeed at observing collisions in a dense beam of cold and slow dipolar molecules.
How do chemical reactions proceed at extremely low temperatures? The answer requires the investigation of molecular samples that are cold, dense, and slow at...
23.10.2017 | Event News
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10.10.2017 | Event News
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