Navigation Links
Stinging came before seeing
Date:3/5/2012

New research from the University of California shows how the ability to detect light could have evolved before anything like an eye.

As published today (March 5) in the journal BMC Biology, the research is based on the stinging mechanism in the tiny, brainless and eyeless freshwater polyp Hydra magnipapillata. Part of a group of animals called cnidarians that includes sea anemones, corals and jellyfish, a hydra is essentially a mouth surrounded by tentacles armed with stinging cells, or cnidocytes.

The researchers David Plachetzki, now a postdoctoral researcher at UC Davis, working with undergraduate Caitlin Fong and Professor Todd Oakley in the Department of Ecology, Evolution and Marine Biology at UC Santa Barbara discovered a simple nervous system linking the stinging cells and nerve cells that detect light using a process similar to the human eye's.

The nerve cells express a set of genes including opsin, a light-sensitive pigment; cyclic nucleotide gated ion channels; and arrestin. These components are basically the same as those in the light-detecting pathway in animals with eyes, including people.

The hydra fire their stingers less in bright than in dim light, the researchers found. When they blocked one of the pathway's components, the hydra acted as if they were in dim light and fired their stingers more.

Most of the hydra's cnidarian relatives lack eyes. But all cnidarians have cnidocyte stinging cells.

"This capacity for stinging cell regulation by light-sensitive neurons could have predated the evolution of eyes in cnidarians," Plachetzki said. Future work will be aimed at how these findings relate to the evolution of eyes in other groups of animals.


'/>"/>

Contact: Andy Fell
ahfell@ucdavis.edu
530-752-4533
University of California - Davis
Source:Eurekalert  

Page: 1

Related biology news :

1. European Neandertals were on the verge of extinction even before the arrival of modern humans
2. Malaria parasite goes bananas before sex: New study
3. 3-D laser map shows earthquake zone before and after
4. MU researchers photoacoustic device finds cancer cells before they become tumors
5. Before sounding an alarm, chimps consider their audience
6. Plasma treatment zaps viruses before they can attack cells
7. Exposure to chemical BPA before birth linked to behavioral, emotional difficulties in girls
8. Exercise before and during early pregnancy increases two beneficial proteins for mothers-to-be
9. Moms who eat high-fat diet before, during pregnancy program babies to be fat, at risk
10. Chronic pain: Watch out before accepting diagnosis and treatment
11. Alzheimers risk gene disrupts brains wiring 50 years before disease hits
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Stinging came before seeing
(Date:5/20/2016)... 2016  VoiceIt is excited to announce its ... By working together, VoiceIt and VoicePass will ... VoicePass take slightly different approaches to voice biometrics, ... and usability. ... partnership. "This marketing and technology partnership ...
(Date:5/3/2016)...  Neurotechnology, a provider of high-precision biometric identification ... Identification System (ABIS) , a complete system for ... can process multiple complex biometric transactions with high ... face or iris biometrics. It leverages the core ... MegaMatcher Accelerator , which have been used in ...
(Date:4/26/2016)... Research and Markets has announced ... 2016-2020"  report to their offering.  , ,     (Logo: ... analysts forecast the global multimodal biometrics market to ... period 2016-2020.  Multimodal biometrics is being ... the healthcare, BFSI, transportation, automotive, and government for ...
Breaking Biology News(10 mins):
(Date:5/25/2016)... ... May 25, 2016 , ... Founder ... double board-certified in surgery and surgery of the hand by the National Board ... stranger to going above and beyond in his pursuit of providing the most ...
(Date:5/25/2016)... LAKE CITY, UTAH. (PRWEB) , ... May 25, 2016 , ... ... efficiencies in healthcare information exchange, today announced that Charles W. Stellar has been named ... as WEDI’s interim CEO since January 2016. As an executive leader with more than ...
(Date:5/24/2016)... ... 24, 2016 , ... Cell therapies for a range of ... research at Worcester Polytechnic Institute (WPI) that yielded a newly patented method of ... The novel method, developed by WPI faculty members Raymond Page, PhD, professor of ...
(Date:5/24/2016)... ... May 24, 2016 , ... Media Cybernetics, ... new Media Cybernetics corporate branding reflects a results-driven revitalization for a company with ... The re-branding components include a crisp, refreshed logo and a new web presence. ...
Breaking Biology Technology: