Sopow and colleagues report in the February issue of Ecology Letters that a chemical stimulus from a galling insect changes the morphology and physiology of its host to benefit these specialized plant feeders.
Galls are atypical plant growths that provide nourishment and shelter for gall-inducing insects. Previous studies could not determine whether insect galls are induced by mechanical or chemical stimuli because gall formation occurred at the sites where the insects were active.
In this study, feeding by the spruce gall adelgid, which measures about one millimeter in length, caused large galls to form up to 800 millimetres away. The effects of chemical stimuli were therefore unambiguously separated from any mechanical influence due to feeding or egg-laying. Initiation and growth of galls was inversely correlated with distance of the insect from buds (potential gall sites), strongly suggesting that galls were induced by a chemical stimulus transported to buds via vascular tissue, and that its efficacy was dose-dependent.
Emily Davis | EurekAlert!
Despite government claims, orangutan populations have not increased. Call for better monitoring
06.11.2018 | Deutsches Zentrum für integrative Biodiversitätsforschung (iDiv) Halle-Jena-Leipzig
Increasing frequency of ocean storms could alter kelp forest ecosystems
30.10.2018 | University of Virginia
Biochips have been developed at TU Wien (Vienna), on which tissue can be produced and examined. This allows supplying the tissue with different substances in a very controlled way.
Cultivating human cells in the Petri dish is not a big challenge today. Producing artificial tissue, however, permeated by fine blood vessels, is a much more...
Faster and secure data communication: This is the goal of a new joint project involving physicists from the University of Würzburg. The German Federal Ministry of Education and Research funds the project with 14.8 million euro.
In our digital world data security and secure communication are becoming more and more important. Quantum communication is a promising approach to achieve...
On Saturday, 10 November 2018, the research icebreaker Polarstern will leave its homeport of Bremerhaven, bound for Cape Town, South Africa.
When choosing materials to make something, trade-offs need to be made between a host of properties, such as thickness, stiffness and weight. Depending on the application in question, finding just the right balance is the difference between success and failure
Now, a team of Penn Engineers has demonstrated a new material they call "nanocardboard," an ultrathin equivalent of corrugated paper cardboard. A square...
Physicists at ETH Zurich demonstrate how errors that occur during the manipulation of quantum system can be monitored and corrected on the fly
The field of quantum computation has seen tremendous progress in recent years. Bit by bit, quantum devices start to challenge conventional computers, at least...
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14.11.2018 | Life Sciences