Navigation Links
Bacterial 'ropes' tie down shifting Southwest
Date:11/16/2009

Researchers from Arizona State University have discovered that several species of microbes (cyanobacteria), at least one found prominently in the deserts of the Southwest, have evolved the trait of rope-building to lasso shifting soil substrates.

These tiny filamentous cyanobacteria are typically found in the environment as multicellular single strands or threads. Though known as pioneers in the biostabilization of soils, scientists have long puzzled over the factors that control and promote the twisting of some species' individual threads into thick cords sometimes inches in length.

Ferran Garcia-Pichel and Martin Wojciechowski, researchers in ASU's School of Life Sciences in the College of Liberal Arts and Sciences, examined genetic markers of rope-makers, relating them to shear stress, soil particle size and friction velocity (linked to erosion) to develop an understanding about the relationship between bacterial behavior, evolutionary fitness and environmental effectors.

The results of their study, published Nov. 17 in the journal Public Library of Science (PLoS) ONE, revealed that rope-building cyanobacteria, typically found in fine, sandy desert soils, marine subtidal stromatolites and coastal sand flats, are able, because of their larger size, to hog-tie sand grains and resist eroding wind and fluid at velocities that would typically wash away their thread-like relatives.

"While forming thick ropes seems to have apparent disadvantages, such as limiting access to light or nutrients, bundling-up actually turns out to be, literally, like throwing your neighbor a life-line," Garcia-Pichel says.

Wojciechowski adds: "These microbes rope-building attributes have added to their success as the true Western pioneers."

Garcia-Pichel believes that it was environmental effectors that led to the selection of genetic traits to promote rope-building. Phylogenetic analyses performed by the researchers have further shown that the evolution of the trait occurred separately in three different genera; an example of convergent evolution, rather than a tie to a single common rope-building ancestor.

In the desert, the initial stabilization of topsoil by rope-builders promotes colonization by a multitude of other microbes. From their interwoven relationships arise complex communities known as "biological soil crusts," important ecological components in the fertility and sustainability of arid ecosystems.


'/>"/>

Contact: Margaret Coulombe
margaret.coulombe@asu.edu
Arizona State University
Source:Eurekalert  

Related biology news :

1. Boston University scientists first to see RNA network in live bacterial cells
2. Caltech scientists get detailed glimpse of chemoreceptor architecture in bacterial cells
3. Genomes reveal bacterial lifestyles: Research
4. Novel bacterial strains clear algal toxins from drinking water
5. Stress signals link pre-existing sickness with susceptibility to bacterial infection
6. Researchers capture bacterial infection on film
7. Forsyth scientists suggest linkages between obesity and oral bacterial infection
8. Finding the constant in bacterial communication
9. Tummy troubles -- gastrin key in bacterial-induced stomach cancer
10. Vitamin D insufficiency linked to bacterial vaginosis in pregnant women
11. Breakthrough in the treatment of bacterial meningitis
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Bacterial 'ropes' tie down shifting Southwest
(Date:6/3/2016)... , June 3, 2016 ... von Nepal hat ... Lieferung hochsicherer geprägter Kennzeichen, einschließlich Personalisierung, Registrierung ... in der Produktion und Implementierung von Identitätsmanagementlösungen. ... Ausschreibung im Januar teilgenommen, aber Decatur wurde ...
(Date:5/24/2016)... superior patient care by providing unparalleled technology to leaders of the medical imaging industry. ... recently added to the range of products distributed by Ampronix. Photo - ... ... ... ...
(Date:5/3/2016)... 2016  Neurotechnology, a provider of high-precision biometric ... Biometric Identification System (ABIS) , a complete system ... ABIS can process multiple complex biometric transactions with ... fingerprint, face or iris biometrics. It leverages the ... MegaMatcher Accelerator , which have been used ...
Breaking Biology News(10 mins):
(Date:6/23/2016)... (PRWEB) , ... June 23, 2016 , ... ... is pleased to announce the launch of their brand, UP4™ Probiotics, into Target ... over 35 years, is proud to add Target to its list of well-respected ...
(Date:6/23/2016)... , June 23, 2016 Houston ... with the Cy-Fair Sports Association to serve as ... the agreement, Houston Methodist Willowbrook will provide sponsorship ... and connectivity with association coaches, volunteers, athletes and ... with the Cy-Fair Sports Association and to bring ...
(Date:6/23/2016)... , June 23, 2016   EpiBiome , ... secured $1 million in debt financing from Silicon Valley ... up automation and to advance its drug development efforts, ... new facility. "SVB has been an incredible ... the services a traditional bank would provide," said Dr. ...
(Date:6/23/2016)... , June 23, 2016 Apellis Pharmaceuticals, ... 1 clinical trials of its complement C3 inhibitor, ... and multiple ascending dose studies designed to assess ... of subcutaneous injection in healthy adult volunteers. ... either as a single dose (ranging from 45 ...
Breaking Biology Technology: