Navigation Links
U of M scientists solve major piece in the origin of biological complexity
Date:11/6/2013

Scientists have puzzled for centuries over how and why multicellular organisms evolved the almost universal trait of using single cells, such as eggs and sperm, to reproduce. Now researchers led by University of Minnesota College of Biological Sciences postdoctoral fellow William Ratcliff and associate professor Michael Travisano have set a big piece of that puzzle into place by applying experimental evolution to transform a single-celled algae into a multicellular one that reproduces by dispersing single cells.

"Until now, biologists have assumed that this single-cell bottleneck evolved well after multicellularity, as a mechanism to reduce conflicts of interest among the cells making up the organism," says Ratcliff. "Instead, we found that it arose at the same time as multicellularity. This has big implications for how multicellular complexity might arise in nature, because it shows that this key trait, which opens the door to evolving greater multicellular complexity, can evolve rapidly."

In an article published today in the journal Nature Communications, the researchers described how they produced the multi-celled strain by repeatedly selecting and culturing algae that settled quickly to the bottom of a liquid-filled test tube. After 73 rounds, they discovered that the algae in one of the tubes had gone multicellular.

Observing the new form, Ratcliff and Travisano discovered that it reproduced by actively breaking up, shedding motile single cells that go on to grow into new multicellular clusters. They developed a mathematical model that explained the reproductive benefit of this single-celled strategy over hypothetical alternatives in which the cluster would produce larger propagules. The model predicted that reproduction from single cells would be more successful in the long run. Even though single cells are less likely to survive than larger propagules, this disadvantage is more than made up for by their sheer number.


'/>"/>
Contact: Stephanie Xenos
sxenos@umn.edu
612-624-8723
University of Minnesota
Source:Eurekalert

Page: 1 2

Related biology news :

1. Stanford scientists develop gene therapy approach to grow blood vessels in ischemic limbs
2. Queens scientists seek vaccine for Pseudomonas infection
3. Scientists produce eye structures from human blood-derived stem cells
4. American Society of Plant Biologists honors early career women scientists
5. Brandeis scientists win prestigious prize for circadian rhythms research
6. Scientists discover new method of proton transfer
7. Salk scientists open new window into how cancers override cellular growth controls
8. WileyChina.com - Now Featuring Bespoke Pages for China’s Life Scientists
9. Scientists win $2 million to study new pathway in development and maintenance of lymphoma
10. UGA scientists reveal genetic mutation depicted in van Goghs sunflower paintings
11. Genetic mutation depicted in van Goghs sunflower paintings revealed by scientists
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/27/2015)... 2015  Synaptics Inc. (NASDAQ: SYNA ), ... announced that Huawei has selected the Synaptics ® ... stylish smartwatch. Huawei chose the state-of-the-art ClearPad capacitive ... and highly responsive human interface qualities such as ... required a classic round watch face and Synaptics ...
(Date:7/21/2015)... Today, ZTE announced its Android smartphone Axon, ... expected revenues in 2015 that relate to sales of FPC1025 for ... approximately 2,200 MSEK for 2015. Jörgen Lantto, CEO of ... in China and we are proud that ... for Axon , its first ...
(Date:7/13/2015)... JOSE, Calif. , July 13, 2015 /PRNewswire/ ... leading developer of human interface solutions, today announced ... generation touch and display driver integration (TDDI) product ... is the first to combine Synaptics , ... with proven display driver technology developed in the ...
Breaking Biology News(10 mins):Synaptics Touchscreen Solution Powers New Huawei Watch 2Synaptics Touchscreen Solution Powers New Huawei Watch 3FPC's Touch Fingerprint Sensor FPC1025 in ZTE's Smartphone Axon 2Synaptics Announces Sampling of Second Generation TDDI Solutions 2Synaptics Announces Sampling of Second Generation TDDI Solutions 3
... virtual reality forest, will anyone hear an environmental message? They ... the make-believe redwood. New findings from Stanford researchers show that ... to saw through a towering sequoia until it crashed in front ... people who only imagined what it,s like to cut down a ...
... will present techniques and discuss surgical approaches and applications ... Association of Neurological Surgeons (AANS), held April 9-13, 2011 ... The Department of Neurosurgery at NYU Langone Medical Center ... hospitals in the country for neurology and neurosurgery by ...
... Mohammad Golabi, a soil science professor at the University of ... to practical use in shielding the reefs in Pago Bay ... of the major health hazards facing Guam,s reefs is soil ... that make up a reef system. "Vetiver,s ability to tolerate ...
Cached Biology News:Stanford's virtual reality lab focuses on conservation 2Stanford's virtual reality lab focuses on conservation 3NYU Langone experts present advances at American Association of Neurological Surgeons Meeting 2Bioengineering with vetiver grass on Guam 2
(Date:7/29/2015)... , July 29, 2015 /PRNewswire/ - BioAmber Inc. (NYSE: ... the Company,s Chief Financial Officer has resigned.  The Company ... Financial Officer who retired in December 2014, as full ... a permanent successor.     Andy Ashworth ... and ensure a smooth transition.  Andy was the Company,s ...
(Date:7/29/2015)... ... July 29, 2015 , ... ... supplier, announces the launch of their 2nd generation cell therapy POD® design. The ... CT, but it also represents a new POD® design. , “G-CON first ...
(Date:7/29/2015)... CHICAGO , July 29, 2015  AmnioChor Inc., ... cell technology, is very pleased to announce that the ... has agreed to invest in their seed round ... OmniBank placental tissue storage capabilities. AmnioChor,s ... placenta, and the human stem cells living within those ...
(Date:7/29/2015)... July 29, 2015  Indivior PLC (LON: INDV) today ... nasal spray was accepted and received Priority Review by ... treatment of opioid overdose. This naloxone nasal spray comes ... for optimal absorption into the nasal mucosa. 1 ... so individuals may be better equipped to help an ...
Breaking Biology Technology:BioAmber Announces Change in Chief Financial Officer 2BioAmber Announces Change in Chief Financial Officer 3G-CON Manufacturing Launches Their 2nd Generation Cell Therapy Cleanroom POD® 2G-CON Manufacturing Launches Their 2nd Generation Cell Therapy Cleanroom POD® 3The Musculoskeletal Transplant Foundation Agrees to Invest in AmnioChor 2Indivior PLC Announces FDA Acceptance of Naloxone Nasal Spray New Drug Application With Priority Review 2Indivior PLC Announces FDA Acceptance of Naloxone Nasal Spray New Drug Application With Priority Review 3Indivior PLC Announces FDA Acceptance of Naloxone Nasal Spray New Drug Application With Priority Review 4Indivior PLC Announces FDA Acceptance of Naloxone Nasal Spray New Drug Application With Priority Review 5
... Jan. 26 Today,s DuPont (NYSE: ... extra comma which could lead to misinterpretation.  The Outlook section ... the company now expects pension expense to be about ... statement should have read: "Due to strong pension fund performance, ...
... New Method Bypasses Need to Obtain Stem Cells From Embryos ... -- The scientist who reprogrammed adult cells into embryonic-like stem cells ... Developmental Biology. , Shinya Yamanaka , MD, PhD, of the ... University , Japan , will be honored with the 2010 March ...
... , ... country, you may be asking how the billions poured into science R&D has helped stimulate ... CA. 2009 just ended as their first branded year with new hires, new instruments and ... ...
Cached Biology Technology:March of Dimes Awards $250,000 Prize to Scientist Who Discovered How to Reprogram Human Cells 2US Nanotechnology Instrument Manufacturer Proves the Success of R&D Stimulus 2
... Acetate: CoA ligase (AMP forming), Acetate ... on protein content. Physical form: ... sucrose and reduced glutathione Preparation ... mol of S-acetyl coenzyme A from acetate, ...
...
... 15(S)-15-methyl PGF2α is a ... It is a potent uterine ... be administered intramuscularly to induce ... reduces serum progesterone concentrations when ...
... Biochem/physiol Actions: Glutathione-S-transferases (GSTs) are a group ... many xenobiotics in mammals. The enzymes ... thiol group of the glutathione to electrophilic ... mutagenic, carcinogenic, and toxic effects of the ...
Biology Products: