Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Salivating aphids and dynamic proteins

13.07.2005


Aphids salivate at the thought of beans! In fact, if it weren’t for their saliva they would starve to death. Professor Aart van Bel (Justus-Liebig-Universität, Germany) will be speaking at the Society for Experimental Biology Annual Main Meeting in Barcelona, on Thursday 14th July [session P2.1] about how special dynamic proteins are involved in ‘plant rescue systems’ and how aphid’s saliva can overcome their defence mechanism.



Bean plants contain contractile protein bodies (forisomes) which change their shape in response to calcium (released during stress). In reaction to wounding, forisomes block the sieve plates (structures in the stems which regulate fluid transport) by changing their shape and acting as a ‘plug’. The dispersion of the forisome protein prevents fluids from leaking out of the plant (otherwise your plants would ‘bleed’ to death when you mow your lawn!).

Aphids overcome this blockage by injecting their saliva into the plant. The forisome’s shape sensitivity to concentrations of calcium is being investigated further as these proteins could potentially be applied in nanomotor systems and also in the provision of nutrients in microfluidity systems for medical research. Currently, attempts are being made to sequence the forisome proteins involved in this reversible dispersion/contraction by Dr. Michael Knoblauch’s group.


Vetch aphids feed off the sieve tubes and are a common infestation to plants, transferring harmful viruses. The reaction of the aphids to the change in fluid flow was investigated with the use of an electrical circuit. When plugging occurred at the sieve plates feeding aphids reacted by producing more saliva. The saliva must contain substances that cause contraction of the forisome protein back to its original state and thus restoring food supplies by clearing the sieve plates.

Diana van Gent | alfa
Further information:
http://www.sebiology.org/vcsearch.asp

More articles from Life Sciences:

nachricht Repairing damaged hearts with self-healing heart cells
22.08.2017 | National University Health System

nachricht Biochemical 'fingerprints' reveal diabetes progression
22.08.2017 | Umea University

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Fizzy soda water could be key to clean manufacture of flat wonder material: Graphene

Whether you call it effervescent, fizzy, or sparkling, carbonated water is making a comeback as a beverage. Aside from quenching thirst, researchers at the University of Illinois at Urbana-Champaign have discovered a new use for these "bubbly" concoctions that will have major impact on the manufacturer of the world's thinnest, flattest, and one most useful materials -- graphene.

As graphene's popularity grows as an advanced "wonder" material, the speed and quality at which it can be manufactured will be paramount. With that in mind,...

Im Focus: Exotic quantum states made from light: Physicists create optical “wells” for a super-photon

Physicists at the University of Bonn have managed to create optical hollows and more complex patterns into which the light of a Bose-Einstein condensate flows. The creation of such highly low-loss structures for light is a prerequisite for complex light circuits, such as for quantum information processing for a new generation of computers. The researchers are now presenting their results in the journal Nature Photonics.

Light particles (photons) occur as tiny, indivisible portions. Many thousands of these light portions can be merged to form a single super-photon if they are...

Im Focus: Circular RNA linked to brain function

For the first time, scientists have shown that circular RNA is linked to brain function. When a RNA molecule called Cdr1as was deleted from the genome of mice, the animals had problems filtering out unnecessary information – like patients suffering from neuropsychiatric disorders.

While hundreds of circular RNAs (circRNAs) are abundant in mammalian brains, one big question has remained unanswered: What are they actually good for? In the...

Im Focus: RAVAN CubeSat measures Earth's outgoing energy

An experimental small satellite has successfully collected and delivered data on a key measurement for predicting changes in Earth's climate.

The Radiometer Assessment using Vertically Aligned Nanotubes (RAVAN) CubeSat was launched into low-Earth orbit on Nov. 11, 2016, in order to test new...

Im Focus: Scientists shine new light on the “other high temperature superconductor”

A study led by scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg presents evidence of the coexistence of superconductivity and “charge-density-waves” in compounds of the poorly-studied family of bismuthates. This observation opens up new perspectives for a deeper understanding of the phenomenon of high-temperature superconductivity, a topic which is at the core of condensed matter research since more than 30 years. The paper by Nicoletti et al has been published in the PNAS.

Since the beginning of the 20th century, superconductivity had been observed in some metals at temperatures only a few degrees above the absolute zero (minus...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Call for Papers – ICNFT 2018, 5th International Conference on New Forming Technology

16.08.2017 | Event News

Sustainability is the business model of tomorrow

04.08.2017 | Event News

Clash of Realities 2017: Registration now open. International Conference at TH Köln

26.07.2017 | Event News

 
Latest News

Cholesterol-lowering drugs may fight infectious disease

22.08.2017 | Health and Medicine

Meter-sized single-crystal graphene growth becomes possible

22.08.2017 | Materials Sciences

Repairing damaged hearts with self-healing heart cells

22.08.2017 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>