Navigation Links
Making the ultimate family sacrifice
Date:11/25/2008

HOUSTON -- (Nov. 25, 2008) -- There is no greater sacrifice than giving one's life for others, and a new study by Rice University biologists and Baylor College of Medicine (BCM) geneticists is helping narrow the search for genes that drive single-celled amoebae to stick close to their kin before altruistically giving their all.

The study, which appears this week in PLoS Biology, focuses on the soil-dwelling amoeba Dictyostelium discoideum. These single-celled creatures eat bacteria, and as long as food is plentiful, they're content to live alone. But when food is scarce, D. discoideum band together by the thousands. About 20 percent of colony members sacrifice themselves to form a stiff stalk that the rest can climb to migrate and form a new colony elsewhere.

This altruistic behavior is a challenge for evolutionary biologists. Why, for example, haven't cheaters -- amoebae who avoid the stalk and focus all their energies on getting into the new colony -- squeezed out their altruistic brethren? What are the genetic checks and balances that guard against cheating?

"They seem to care how genetically similar their partners are," study co-author David Queller said of the new findings. "That's something that you see in other social organisms, and you'd expect to see it from theory, but it's still kind of surprising to see that behavior in an amoeba."

Queller, Rice's Harry C. and Olga K. Wiess Professor of Ecology and Evolutionary Biology, and colleagues examined how much mixing occurred between 16 strains of D. discoideum. The genetic similarities between strains varied, and the tests revealed that the more genetically akin two strains were, the more they mixed and worked together during colony formation.

Rice postdoctoral researcher Elizabeth Ostrowski, the study's lead author, said a number of studies have previously shown that genetically dissimilar strains of D. discoideum sometimes li
'/>"/>

Contact: Jade Boyd
jadeboyd@rice.edu
713-348-6778
Rice University
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Scientists present moving theory behind bacterial decision-making
2. Making flies sick reveals new role for growth factors in immunity
3. Making metabolism more inefficient can reduce obesity
4. The making of Dig It! the Secrets of Soil exhibit
5. Making snack food choices
6. NIST trumps the clumps: Making biologic drugs safer
7. Small protein may have big role in making more bone and less fat
8. Research suggests parts of UK could be too hot for wine making by 2080
9. Research suggests parts of UK could be too hot for wine-making by 2080
10. Findings a step toward making new optical materials
11. Making sure the wonder materials dont become the wonder pollutant
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/20/2015)... and Markets ( http://www.researchandmarkets.com/research/vkzvcs/iris_biometrics ) has announced the ... Report" report to their offering. This report ... The report provides separate comprehensive analytics for the US, ... Europe , Asia-Pacific , ... . Annual estimates and forecasts are provided ...
(Date:3/18/2015)... SPRINGS, Florida , March 18, 2015 ... well as businesses, new revolutionary smart wallets and apps continue ... pace.  Companies currently entrenched in the mobile payment industry in ... Alibaba Group Holding Ltd. (NYSE: BABA ), Apple ... GOOG ) and Facebook Inc. (NASDAQ: FB ...
(Date:3/17/2015)... , March 17, 2015 Emotient, ... analytics software, today announced general availability of ... service for the analysis of facial expressions. The ... advertising, media content, products and services. It delivers ... engagement and sentiment - as derived from facial ...
Breaking Biology News(10 mins):Iris Biometrics - Global Strategic Business Report 2015: System & Network Access Control - A Robust Market Opportunity in the Offing 2Iris Biometrics - Global Strategic Business Report 2015: System & Network Access Control - A Robust Market Opportunity in the Offing 3Iris Biometrics - Global Strategic Business Report 2015: System & Network Access Control - A Robust Market Opportunity in the Offing 4Iris Biometrics - Global Strategic Business Report 2015: System & Network Access Control - A Robust Market Opportunity in the Offing 5Revolutionary Smart Wallet & Mobile Payment Choices Change the Game for Consumers - Company Begins Shipping Newest Digital Wallet to Customers 2Revolutionary Smart Wallet & Mobile Payment Choices Change the Game for Consumers - Company Begins Shipping Newest Digital Wallet to Customers 3Revolutionary Smart Wallet & Mobile Payment Choices Change the Game for Consumers - Company Begins Shipping Newest Digital Wallet to Customers 4Revolutionary Smart Wallet & Mobile Payment Choices Change the Game for Consumers - Company Begins Shipping Newest Digital Wallet to Customers 5Revolutionary Smart Wallet & Mobile Payment Choices Change the Game for Consumers - Company Begins Shipping Newest Digital Wallet to Customers 6New Emotient Web Service Measures Audience Response Using On-Demand Facial Expression Analysis 2New Emotient Web Service Measures Audience Response Using On-Demand Facial Expression Analysis 3New Emotient Web Service Measures Audience Response Using On-Demand Facial Expression Analysis 4
... your average persons idea of a good time, but for ... I think worms are totally cool, like humans only simpler ... working with the invertebrates is what will bring Dr. Fraser ... he will present some of his research findings in a ...
... ALBUQUERQUE, N.M. As Americans demand new and cleaner ... turning to algae as a promising new fuel source. ... nation,s reliance on imported oil while contributing to rural ... that algae-based biofuels could displace large volumes of diesel ...
... The American Association for Dental Research (AADR) has announced ... Chilton Fellowship in Clinical Research recipient. He will be ... Washington, DC, March 3, 2010. Currently, Dawson is ... the Delta Dental of Kentucky Clinical Research Center, in ...
Cached Biology News:The impact of genomics 2Fueling the future with fish tank residue: Sandia scientist discusses use of algae as a biofuel 2Fueling the future with fish tank residue: Sandia scientist discusses use of algae as a biofuel 3Fueling the future with fish tank residue: Sandia scientist discusses use of algae as a biofuel 4
(Date:4/21/2015)... 21, 2015 Staying true to their ... a digital product that makes the world a better ... Biological Standards Institute (GBSI) to redesign their website ( ... most importantly, strategy-based. , "Biomedical research is not always ... less to promote it in a narrative way on ...
(Date:4/21/2015)... 21, 2015 Invetech , a ... automation, and contract manufacturing, and  NanoCellect Biomedical, ... and cell sorting technology for life science researchers, ... flow cytometry platform. Headquartered in ... developed a microchip-based cell sorting technology. NanoCellect,s flow ...
(Date:4/21/2015)... , April 21, 2015  Tute Genomics, a leading provider ... Josh Forsythe as VP of Marketing. Mr. Forsythe ... a significant expansion in its commercial operations over the last ... " Josh Forsythe is a tremendous addition to ... MBA, CEO of Tute Genomics. "Josh,s vast experience commercializing software ...
(Date:4/21/2015)... RESEARCH TRIANGLE PARK, N.C. , April 21, 2015 ... announced today that it will release its first quarter ... 28, 2015. United Therapeutics will host a ... a.m. Eastern Time.  The teleconference is accessible by dialing ... the teleconference will be available for one week and ...
Breaking Biology Technology:Visceral Tells GBSI’s Story Within 30 Seconds of Attention 2Visceral Tells GBSI’s Story Within 30 Seconds of Attention 3NanoCellect And Invetech Announce Collaboration To Develop Novel Flow Cytometry Platform For Cell Sorting And Analysis 2NanoCellect And Invetech Announce Collaboration To Develop Novel Flow Cytometry Platform For Cell Sorting And Analysis 3Tute Genomics Continues Expansion of Genomic Medicine Commercial Operations; Appoints Josh Forsythe as New VP of Marketing 2Tute Genomics Continues Expansion of Genomic Medicine Commercial Operations; Appoints Josh Forsythe as New VP of Marketing 3Tute Genomics Continues Expansion of Genomic Medicine Commercial Operations; Appoints Josh Forsythe as New VP of Marketing 4
... processing revenues in the third, quarter of 2007 increased 25 percent ... ... Oct. 11 CryoLife, Inc. (NYSE: CRY ),a biomaterials, medical ... revenues for the third quarter,of 2007 were approximately $21.9 million compared ...
... Challenges and Opportunities to Realize ... Critical Path Initiative Goals, ... PHST), a leading provider of software,strategic consulting, and regulatory services ... senior vice,president and chief technology officer, has been invited to ...
... Solstice Neurosciences, Inc.,("Solstice") announced the appointment of ... Smith will serve as Executive Chairman replacing James,Thomas, ... Chairman since Solstice,was founded in July 2004. ... expertise to Solstice that will be invaluable in ...
Cached Biology Technology:CryoLife Announces Preliminary Third Quarter 2007 Revenues of Approximately $21.9 Million 2CryoLife Announces Preliminary Third Quarter 2007 Revenues of Approximately $21.9 Million 3CryoLife Announces Preliminary Third Quarter 2007 Revenues of Approximately $21.9 Million 4CryoLife Announces Preliminary Third Quarter 2007 Revenues of Approximately $21.9 Million 5Pharsight Invited to Present on Winning Strategies for R&D Productivity at New York Pharma Forum on October 15, 2007 2Pharsight Invited to Present on Winning Strategies for R&D Productivity at New York Pharma Forum on October 15, 2007 3Dennis L. Smith Appointed Executive Chairman to Board of Directors of Solstice Neurosciences, Inc. 2
...
Practical tool for easy, effective sealing of 0.2ml PCR tubes and plates using cap strips....
Kit for testing the ability of a compound to simulate lipolysis in cultured human adipocytes. Kit contains controls, buffers and reagents for detecting glycerol and non-esterified free fatty acids. A...
... The TRAPeze RT Telomerase Detection ... in vitro assay for the ... quantification of telomerase activity. It ... TRAPeze assay and adds the ...
Biology Products: