Navigation Links
Asexual worm quickly adapts to soil contamination

Soil contaminants lead to rapid genetic adaptations in the nematode Acrobeloides nanus. The worms from contaminated soil live longer and lay more eggs under polluted conditions than the worms from unpolluted soil. Dutch-sponsored researcher Agnieszka Doroszuk demonstrated this in her study into the long-term effects of environmental pollution on soil organisms.

Environmental pollution is an important cause of stress in natural populations. This not only has consequences for the size, dynamics and structure of the population but it can also lead to genetic changes and adaptations. Doroszuk investigated the long-term effects of pollution on the bacteria-eating nematode Acrobeloides nanus. This asexually reproducing nematode is easy to culture and study. The research is innovative due to a multidisciplinary approach, in which methods from various disciplines such as ecology, toxicology, molecular biology and evolutionary biology provide insights into the effect of soil pollution at different levels of biological organisation.

Genetic adaptation

The nematode was exposed to a combination of different pH and copper values. As well as their individual effects, the pH and the copper levels in the soil can exert a synergistic effect on the nematode population. Unexpectedly fast adaptation was observed and considerable genetic changes took place. As a result of this the nematodes in the polluted soil became resistant to the contamination. In the contaminated culturing medium they laid more eggs and lived for longer than the nematodes from the clean soil.

Asexual

The rapid adaptation to the environment in an asexual species is an interesting finding. It contradicts the general opinion that asexual species have low adaptive potential and that they adapt to stress less easily than sexual species. At present these asexual species are used as test organisms in ecotoxicological risk evaluations. The question now arises as to whether they are suitable for this purpose.

The results of this study are important for the development of protection strategies for natural populations. This can be realised by focusing environmental management more on functions such as biomass turnover rate and less on the structure and biomasss of populations per se. In her thesis Doroszuk shows that contributions from various research disciplines are crucial for insight into underlying mechanisms of the response to stress and for the consequences for the natural system.
'"/>

Source:Netherlands Organization for Scientific Research


Related biology news :

1. To translate touch, the brain can quickly rearrange its sense of the body
2. Gene patterns in white blood cells quickly diagnose disease
3. Animals can change genes quickly to keep up with viral ingenuity
4. New MRI technique quickly builds 3-D images of knees
5. Mussels evolve quickly to defend against invasive crabs
6. Biodegradable napkin -- featuring sensitive nanofibers -- may quickly detect biohazards
7. Drug can quickly mobilize an army of cells to repair injury
8. A new portable biosensor detects traces of contaminants in food more quickly and cheaply
9. Resistant HIV quickly hides in infants cells
10. Arctic ice retreating more quickly than computer models project
11. Retina adapts to seek the unexpected, ignore the commonplace

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:6/3/2016)... 3, 2016 Das ... Nepal hat ein 44 ... geprägter Kennzeichen, einschließlich Personalisierung, Registrierung und IT-Infrastruktur, ... Produktion und Implementierung von Identitätsmanagementlösungen. Zahlreiche renommierte ... Januar teilgenommen, aber Decatur wurde als konformste ...
(Date:6/2/2016)... -- Perimeter Surveillance & Detection Systems, Biometrics ... Support & Other Service  The latest report ... analysis of the global Border Security market . ... $17.98 billion in 2016. Now: In November ... software and hardware technologies for advanced video surveillance. ...
(Date:5/20/2016)... , May 20, 2016  VoiceIt is excited ... with VoicePass. By working together, VoiceIt ...  Because VoiceIt and VoicePass take slightly different approaches ... increases both security and usability. ... about this new partnership. "This marketing ...
Breaking Biology News(10 mins):
(Date:6/23/2016)... 2016  Blueprint Bio, a company dedicated to identifying, ... community, has closed its Series A funding round, according ... "We have received a commitment from Forentis Fund ... to meet our current goals," stated Matthew Nunez ... to complete validation on the current projects in our ...
(Date:6/23/2016)... ... June 23, 2016 , ... ClinCapture, the only free validated ... will showcase its product’s latest features from June 26 to June 30, 2016 ... on Disrupting Clinical Trials in The Cloud during the conference. DIA (Drug ...
(Date:6/23/2016)... June 22, 2016  Amgen (NASDAQ: AMGN ... QB3@953 life sciences incubator to accelerate the ... shared laboratory space at QB3@953 was created to help ... obstacle for many early stage organizations - access to ... sponsorship, Amgen launched two "Amgen Golden Ticket" awards, providing ...
(Date:6/22/2016)... Research and Markets has announced the addition of the ... The global biomarkers market ... 2013. The market is expected to grow at a five-year compound ... from $50.6 billion in 2015 to $96.6 billion in 2020. ... (2015 to 2020) are discussed. As well, new products approved in ...
Breaking Biology Technology: