Featured Research

from universities, journals, and other organizations

Bacteria Reveal Secret Of Adaptation At Evolution Canyon

Date:
July 30, 2008
Source:
Society for General Microbiology
Summary:
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.

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.

Related Articles


'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."


Story Source:

The above story is based on materials provided by Society for General Microbiology. Note: Materials may be edited for content and length.


Journal Reference:

  1. J. Sikorski, E. Brambilla, R. M. Kroppenstedt and B. J. Tindall. The temperature-adaptive fatty acid content in Bacillus simplex strains from 'Evolution Canyon', Israel. Microbiology, 2008; 154: 2416 - 2426 [link]

Cite This Page:

Society for General Microbiology. "Bacteria Reveal Secret Of Adaptation At Evolution Canyon." ScienceDaily. ScienceDaily, 30 July 2008. <www.sciencedaily.com/releases/2008/07/080727224059.htm>.
Society for General Microbiology. (2008, July 30). Bacteria Reveal Secret Of Adaptation At Evolution Canyon. ScienceDaily. Retrieved November 27, 2014 from www.sciencedaily.com/releases/2008/07/080727224059.htm
Society for General Microbiology. "Bacteria Reveal Secret Of Adaptation At Evolution Canyon." ScienceDaily. www.sciencedaily.com/releases/2008/07/080727224059.htm (accessed November 27, 2014).

Share This


More From ScienceDaily



More Plants & Animals News

Thursday, November 27, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Classic Hollywood Memorabilia Goes Under the Hammer

Classic Hollywood Memorabilia Goes Under the Hammer

Reuters - Entertainment Video Online (Nov. 26, 2014) The iconic piano from "Casablanca" and the Cowardly Lion suit from "The Wizard of Oz" fetch millions at auction. Sara Hemrajani reports. Video provided by Reuters
Powered by NewsLook.com
Pet Dogs to Be Used in Anti-Ageing Trial

Pet Dogs to Be Used in Anti-Ageing Trial

Reuters - Innovations Video Online (Nov. 26, 2014) Researchers in the United States are preparing to discover whether a drug commonly used in human organ transplants can extend the lifespan and health quality of pet dogs. Video provided by Reuters
Powered by NewsLook.com
From Popcorn To Vending Snacks: FDA Ups Calorie Count Rules

From Popcorn To Vending Snacks: FDA Ups Calorie Count Rules

Newsy (Nov. 25, 2014) The US FDA is announcing new calorie rules on Tuesday that will require everywhere from theaters to vending machines to include calorie counts. Video provided by Newsy
Powered by NewsLook.com
Feast Your Eyes: Lamb Chop Sent Into Space from UK

Feast Your Eyes: Lamb Chop Sent Into Space from UK

Reuters - Light News Video Online (Nov. 25, 2014) Take a stab at this -- stunt video shows a lamb chop's journey from an east London restaurant over 30 kilometers into space. Rough Cut (no reporter narration). Video provided by Reuters
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins