Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Plants Can Protect Themselves From Aphids And Locusts

15.12.2003


Moscow biologists have proved that people can use the capability of some plants to protect themselves from vermin insects with the help of biologically active substances.



It has been found that plants can protect themselves from vermin insects. One way is to use substances which the plants synthesise to suppress insects’ hormones activity and to disrupt their development cycle. Having studied the way these substances act, people can try to use these substances for their own purposes.

This rseearch became the objective of work by biologists from the Severtsov Institute for Ecology and Evolution Problems, Russian Academy of Sciences. They have investigated substances called precocenes that disrupt activity of the so-called juvenile hormone, which ensures normal larva development and insect propagation. The plants that synthesise precocenes intensely are as follows: Ageratum mexicanum, Phacelia, and possibly chrysanthemum.


The researchers have selected the insect species that are particularly sensitive to precocenes’ action: Asiatic locust (Locusta migratoria), green peach aphid (Myzus persicae), greenhouse whitefly (Trialeurodes vaporariorum), and insensitive insects including the honeybee (Apis mellifera) have been selected for the background group.

The researchers fed the insect larvae with the leaves of ageratum, and the result surpassed all expectations. The larvae either died or started to pupate rapidly, but the hatched out adult insects were incapable of reproduction. The larvae’s digestive system was disrupted: the intestines reduced in size, and intestinal epithelium cells altered.

This plant precocenes action is similar to that of some well-known insecticides. The alterations affect even the insect’s brain, for instance, neurosecretory cells, which send nerve impulses and along with that excrete special substances within the secretion. On top of that, the larvae’s wax glands activity was disrupted, these glands secreting wax to protect larvae from drying up. And finally, antennas – insects’ organs of sense - underwent alterations, which impeded finding fodder plants and sexual partners. So, the locust, aphid and whitefly have failed to withstand precocenes.

The case is different with the honey bee. This useful and rather domestic insect suffers from parasitical mites, which provoke the disease varroathosis. The mites can be fought with the help of precocenes as they make them sterile. Precocenes do not affect the bees due to some biochemical peculiarities. Therefore, the researchers advise that beekeepers should apply these substances.

Sergey Komarov | Informnauka
Further information:
http://www.informnauka.ru

More articles from Life Sciences:

nachricht Scientists uncover the role of a protein in production & survival of myelin-forming cells
19.07.2018 | Advanced Science Research Center, GC/CUNY

nachricht NYSCF researchers develop novel bioengineering technique for personalized bone grafts
18.07.2018 | New York Stem Cell Foundation

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: Future electronic components to be printed like newspapers

A new manufacturing technique uses a process similar to newspaper printing to form smoother and more flexible metals for making ultrafast electronic devices.

The low-cost process, developed by Purdue University researchers, combines tools already used in industry for manufacturing metals on a large scale, but uses...

Im Focus: First evidence on the source of extragalactic particles

For the first time ever, scientists have determined the cosmic origin of highest-energy neutrinos. A research group led by IceCube scientist Elisa Resconi, spokesperson of the Collaborative Research Center SFB1258 at the Technical University of Munich (TUM), provides an important piece of evidence that the particles detected by the IceCube neutrino telescope at the South Pole originate from a galaxy four billion light-years away from Earth.

To rule out other origins with certainty, the team led by neutrino physicist Elisa Resconi from the Technical University of Munich and multi-wavelength...

Im Focus: Magnetic vortices: Two independent magnetic skyrmion phases discovered in a single material

For the first time a team of researchers have discovered two different phases of magnetic skyrmions in a single material. Physicists of the Technical Universities of Munich and Dresden and the University of Cologne can now better study and understand the properties of these magnetic structures, which are important for both basic research and applications.

Whirlpools are an everyday experience in a bath tub: When the water is drained a circular vortex is formed. Typically, such whirls are rather stable. Similar...

Im Focus: Breaking the bond: To take part or not?

Physicists working with Roland Wester at the University of Innsbruck have investigated if and how chemical reactions can be influenced by targeted vibrational excitation of the reactants. They were able to demonstrate that excitation with a laser beam does not affect the efficiency of a chemical exchange reaction and that the excited molecular group acts only as a spectator in the reaction.

A frequently used reaction in organic chemistry is nucleophilic substitution. It plays, for example, an important role in in the synthesis of new chemical...

Im Focus: New 2D Spectroscopy Methods

Optical spectroscopy allows investigating the energy structure and dynamic properties of complex quantum systems. Researchers from the University of Würzburg present two new approaches of coherent two-dimensional spectroscopy.

"Put an excitation into the system and observe how it evolves." According to physicist Professor Tobias Brixner, this is the credo of optical spectroscopy....

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Leading experts in Diabetes, Metabolism and Biomedical Engineering discuss Precision Medicine

13.07.2018 | Event News

Conference on Laser Polishing – LaP: Fine Tuning for Surfaces

12.07.2018 | Event News

11th European Wood-based Panel Symposium 2018: Meeting point for the wood-based materials industry

03.07.2018 | Event News

 
Latest News

A smart safe rechargeable zinc ion battery based on sol-gel transition electrolytes

20.07.2018 | Power and Electrical Engineering

Reversing cause and effect is no trouble for quantum computers

20.07.2018 | Information Technology

Princeton-UPenn research team finds physics treasure hidden in a wallpaper pattern

20.07.2018 | Materials Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>