Featured Research

from universities, journals, and other organizations

Cheating slime mold gets the upper hand

Date:
January 9, 2013
Source:
BioMed Central Limited
Summary:
A ‘cheater’ mutation (chtB) in Dictyostelium discoideum, a free living slime mould able to co-operate as social organism when food is scarce, allows the cheater strain to exploit its social partner, finds a new study. The mutation ensures that when mixed with ‘normal’ Dictyostelium more than the fair share of cheaters become spores, dispersing to a new environment, and avoiding dying as stalk cells.

A ‘cheater’ mutation (chtB) in Dictyostelium discoideum, a free living slime mould able to co-operate as social organism when food is scarce, allows the cheater strain to exploit its social partner, finds a new study.
Credit: Lorenzo A Santorelli, Adam Kuspa, Gad Shaulsky, David C Queller and Joan E Strassmann

A ‘cheater’ mutation (chtB) in Dictyostelium discoideum, a free living slime mould able to co-operate as social organism when food is scarce, allows the cheater strain to exploit its social partner, finds a new study published in BioMed Central’s open access journal BMC Evolutionary Biology. The mutation ensures that when mixed with ‘normal’ Dictyostelium more than the fair share of cheaters become spores, dispersing to a new environment, and avoiding dying as stalk cells.

Dictyostelium have an unusual life style. They generally live as individual amoeboid cells, eating bacteria in leaf litter and soil. However when they run out of food they form a multi-cellular ‘slug’ capable of travelling to a new environment. However if conditions are right they behave more like a fungus, producing a stalk and a fruiting body which releases spores. During this co-operative behaviour approximately 20% become stalk cells which are doomed to starvation but, after dispersal, the spores germinate into new amoeba.

The chtB strain is able to reduce the ability of normal Dictyostelium to form spores so that when mixed in equal numbers with wild type Dictyostelium 60% of the spores will be chtB. The chtB mutation appeared to be normal in all other respects and the mutation had no ‘fitness cost’ which might impede its behaviour or lifespan. In fact the mutation allowed chtB to divide faster in liquid medium.

Dr Lorenzo Santorelli from the University of Oxford who led this study, conducted at Baylor College of Medicine in the Shaulsky lab explained, “chtB cells inhibit the pre-spore gene cotB in their wild type partner. This appears to force the wild type Dictyostelium to become cells at the base of the stalk rather than stalk cells or spores. Cheaters are essentially parasites, but we could not find the expected fitness cost which usually prevents such cheaters from taking over.”

Related Articles



Story Source:

The above story is based on materials provided by BioMed Central Limited. Note: Materials may be edited for content and length.


Journal Reference:

  1. Lorenzo A Santorelli, Adam Kuspa, Gad Shaulsky, David C Queller and Joan E Strassmann. A new social gene in Dictyostelium discoideum, chtB. BMC Evolutionary Biology, 2013 (in press) [link]

Cite This Page:

BioMed Central Limited. "Cheating slime mold gets the upper hand." ScienceDaily. ScienceDaily, 9 January 2013. <www.sciencedaily.com/releases/2013/01/130108201515.htm>.
BioMed Central Limited. (2013, January 9). Cheating slime mold gets the upper hand. ScienceDaily. Retrieved March 3, 2015 from www.sciencedaily.com/releases/2013/01/130108201515.htm
BioMed Central Limited. "Cheating slime mold gets the upper hand." ScienceDaily. www.sciencedaily.com/releases/2013/01/130108201515.htm (accessed March 3, 2015).

Share This


More From ScienceDaily



More Plants & Animals News

Tuesday, March 3, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Rare Goblin Shark Found in Australia

Rare Goblin Shark Found in Australia

AFP (Mar. 3, 2015) A goblin shark, a rare sea creature described as an &apos;alien of the deep&apos; is found off Australia and delivered to the Australian Museum in Sydney. Duration: 01:25 Video provided by AFP
Powered by NewsLook.com
500 Snakes Surprise Construction Workers In Canada

500 Snakes Surprise Construction Workers In Canada

Newsy (Mar. 2, 2015) Hundreds of snakes, disturbed by a construction project, were relocated to a wildlife rescue association in Canada. Video provided by Newsy
Powered by NewsLook.com
Going Gluten-Free Could Get You A Tax Break

Going Gluten-Free Could Get You A Tax Break

Newsy (Mar. 2, 2015) If a doctor advises you to remove gluten from your diet, you could get a tax deduction on the amount you spend on gluten-free foods. Video provided by Newsy
Powered by NewsLook.com
Zookeepers Copy Animal Poses In Hilarious Viral Photos

Zookeepers Copy Animal Poses In Hilarious Viral Photos

Buzz60 (Mar. 2, 2015) Zookeepers at the Symbio Wildlife Park in Helensburgh, Australia decided to take some of their favorite animal photos and recreate them by posing just like the animals. Jen Markham (@jenmarkham) has the story. Video provided by Buzz60
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