Navigation Links
Bacteria reveal secret of adaptation at Evolution Canyon
Date:7/27/2008

Bacteria living on opposite sides of a canyon have evolved to cope with different temperatures by altering the make-up of their 'skin', or cell membranes. Scientists have found that bacteria change these complex and important structures to adapt to different temperatures by looking at the appearance of the bacteria as well as their genes. The researchers hope their study, published in the August issue of Microbiology, will start a new trend in research.

'Evolution Canyons' I and II are in Israel. They are similar, each with a hot south-facing slope and a cooler north-facing slope. The sun-exposed 'African' south-facing slopes get eight times more solar radiation than the shady, green, lush 'European' north-facing slopes. Scientists studied 131 strains of Bacillus simplex and found that bacteria on different slopes have evolved differently, forming different 'ecotypes' of the same species.

"We expected that 'ecotype' formation was linked to temperature but we had no initial clue of which specific cell attributes could have led to the adaptation," said Dr Johannes Sikorski from DSMZ in Germany. "To find out, we definitely had to study the appearance of the bacteria, not only their genes."

The cell membrane is one of the most important and complex parts of a cell. Membranes contain different fatty acid molecules; the branching type can change depending on temperature to keep the cell alive. The researchers found significant differences in the fatty acids of several ecotypes that live on different slopes in Evolution Canyon.

"Bacteria respond to temperature by altering their fatty acid composition in a constitutive, long-term fashion," said Dr Sikorski. We found that 'African' ecotypes from the hot slopes had more heat-tolerant fatty acids and 'European' ecotypes from the cool slopes had more cold-tolerant fatty acids in their membranes."

In most modern evolutionary studies, scientists rely on genetic data alone. Dr Sikorski and his colleagues focussed on the result of the genetic changes instead: what the bacteria look like. "It is not a 'sexy' technique like genomics or proteomics but it gives a more comprehensive insight into the result of adaptation of the cell membrane," said Dr Sikorski.

"Right now it is not possible to deduce the composition of a cell membrane using genomics or proteomics alone. To understand evolution we need to explain the consequences of genetic differences for the organism in its natural environment."


'/>"/>

Contact: Lucy Goodchild
l.goodchild@sgm.ac.uk
44-118-988-1843
Society for General Microbiology
Source:Eurekalert

Related biology news :

1. Shuttle brings space-grown strep bacteria back for study
2. The worlds oldest bacteria
3. Bacteria from sponges make new pharmaceuticals
4. Boston University biomedical engineers find chink in bacterias armor
5. University of Leicester scientists discover technique to help friendly bacteria
6. Spaceflight shown to alter ability of bacteria to cause disease
7. A tiny pinch from a z-ring helps bacteria cells divide
8. Legionnaires bacterial proteins work together to survive
9. Scripps research team blocks bacterial communication system to prevent deadly staph infections
10. NSF awards Stevens team $1 million for research on smart, bacteria-repellent nanohydrogels
11. Chemical compound present in detergents produce bacteria alterations in agricultural soils
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/20/2017)... ALLENTOWN, Pa. , March 20, 2017 ... PD 2.0 personal spirometer and Wellness Management System (WMS), ... Founded in 2010, PMD Healthcare is a ... Company with a mission dedicated to creating innovative solutions ... of life. With that intent focus, PMD developed the ...
(Date:3/9/2017)... Australia , March 9, 2017 4Dx ... prestigious World Lung Imaging Workshop at the University of ... was invited to deliver the latest data to world ... recognised event brings together leaders at the forefront of ... in lung imaging. "The quality of ...
(Date:3/7/2017)... 2017   HireVue , the leading provider of ... the best talent, faster, today announced the additions of ... and Diana Kucer as Chief Marketing Officer ... team poised to drive continued growth in the company,s ... of record bookings in 2017. "Companies worldwide ...
Breaking Biology News(10 mins):
(Date:3/29/2017)... Research and Markets has announced the addition of the ... to their offering. ... The study scope includes key agricultural biotechnology ... biology tools and genome editing tools); synthetic biology-enabled chemicals and ... products are analyzed to determine present and future market sizes, ...
(Date:3/28/2017)... ... March 28, 2017 , ... NetDimensions announced today that ... enhance training plan management for consistent implementation of standards and regulatory requirements across ... Group to help improve and streamline their training and employee development programs, which ...
(Date:3/28/2017)... (PRWEB) , ... March 28, 2017 , ... ... at a Marketing Roundtable on March 22 in Philadelphia. The event was offered ... , The Marketing Roundtable featured breakout groups and interaction with speakers ...
(Date:3/28/2017)... Summary This report provides all the information ... interests and activities since 2010. Description The Partnering Deals ... the partnering activity of one of the world,s leading life ... upon purchase to ensure inclusion of the most up to ... be delivered in PDF format within 1 working day of ...
Breaking Biology Technology: