Navigation Links
Symbiotic bacteria program daily rhythms in squid using light and chemicals
Date:4/1/2013

are necessary for cycling, she says, since squid grown without their bacterial symbionts do not cycle their expression of escry1, and mimicking the bacterial light with a blue light did not induce the cycling.

And they showed that the light is also necessary, because squids grown with defective V. fischeri symbionts that lack the ability to luminesce didn't cycle their expression of escry1 either. With light-defective bacteria in their light organs, squids exposed to the blue light got back on track, cycling escry1 production as usual.

What is it about the bacteria that could be signaling to the squid? Long experience taught McFall-Ngai where to turn next: microbe-associated molecular patterns (MAMPs), molecules that signal the presence of microbes to other creatures. "In this system we have found again and again that bacterial surface molecules are active at inducing all kinds of cellular behavior in the host," says McFall-Ngai.

Her hunch was right. MAMPs plus light turned cycling on. In squid grown without symbionts, light, combined with MAMPs (either the lipid A component of lipopolysaccharide or the peptidoglycan monomer), could induce some degree of cycling. The squid did not respond fully, though, maybe because the MAMPs were only injected into their seawater habitat, not presented directly to the light organ.

The fact that a bacterium can control a daily rhythm in a squid is exciting for other areas of biology, says McFall-Ngai, because all animals, including humans, have clock genes like escry1.

"Recently, in two different studies, biologists have found that there is profound circadian rhythm in both the epithelium [of the human gut] and the mucosal immune system of the gut that is controlled by these clock genes. What are we missing? Are the bacteria affected by or inducing the cycling of the tissues with which they associate?" We don't know," says McFall-Ngai, but it's an area ripe for study.


'/>"/>
Contact: Jim Sliwa
jsliwa@asmusa.org
202-942-9297
American Society for Microbiology
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Genetically modified corn affects its symbiotic relationship with non-target soil organisms
2. Unique adaptations to a symbiotic lifestyle reveal novel targets for aphid insecticides
3. Carnivorous plants rely on the services and wastes of a symbiotic ant for nutrition
4. Bugs need symbiotic bacteria to exploit plant seeds
5. Leading evolutionary scientist to discuss how genome of bacteria has evolved
6. Study by UC Santa Barbara researchers suggests that bacteria communicate by touch
7. Team discovers how bacteria resist a Trojan horse antibiotic
8. From scourge to saint: E. coli bacteria becomes a factory - to make cheaper, faster pharmaceuticals
9. Bacterial shock to recapture essential phosphate
10. Disarming disease-causing bacteria
11. Study shows unified process of evolution in bacteria and sexual eukaryotes
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:8/21/2014)... darkness use a previously unknown process for harvesting energy ... by a Penn State University scientist has discovered. The ... improving plant growth, harvesting energy from the Sun, and ... Erie and other lakes worldwide. A paper describing the ... Express edition of the journal Science on ...
(Date:8/21/2014)... researchers from Beth Israel Deaconess Medical Center (BIDMC ) ... Most Influential Scientific Minds 2014," a comprehensive list ... web resource for science metrics and research performance analysis. ... most influential "are performing and publishing work that their ... science," according to a Thomson Reuters statement. Researchers were ...
(Date:8/21/2014)... the journal Carcinogenesis by researchers at the ... protein adenomatous polyposis coli (APC) in suppressing colorectal cancer ... U.S. , Lead author Kristi Neufeld, associate professor in ... Cancer Biology program at the KU Cancer Center, has ... understand the various activities of APC, a protein whose ...
Breaking Biology News(10 mins):Hot-spring bacteria reveal ability to use far-red light for photosynthesis 2Hot-spring bacteria reveal ability to use far-red light for photosynthesis 3BIDMC researchers named among 'the most influential scientific minds' 2BIDMC researchers named among 'the most influential scientific minds' 3Research offers insight into cellular biology of colorectal cancer 2Research offers insight into cellular biology of colorectal cancer 3
... seen the story in the news before. Whether it,s the death ... in August, or of an elderly woman gardening in the middle ... condition for which there is no treatment beyond submersion in ice ... to a normal temperature. But, in a new ...
... and behavioral issues associated with excess MeCP2 protein result from overexpression ... MOR 1]), which may point the way to treating these problems ... College of Medicine scientists in a report that appears online ... Much of the work was done at the Jan and ...
... local fishermen would rather keep them out of their ... limits yet frequently surface in tows when fishermen are ... "bycatch" can get a fishery shut down by regulators ... caught. The University of Delaware,s Matthew Oliver, assistant ...
Cached Biology News:'Couch potato pill' might stop heat stroke too 2'Couch potato pill' might stop heat stroke too 32 genes affect anxiety, behavior in mice with too much MeCP2 2University scientists aiding fishermen in butterfish conundrum 2University scientists aiding fishermen in butterfish conundrum 3
(Date:8/22/2014)... Researchers at the University of Surrey have discovered how ... the body,s clock genes. , The new study, published ... that this clock activity in turn regulates the cycle ... researchers also discovered that the local biological clock and ... importance of the clock in bladder physiology and ageing. ...
(Date:8/22/2014)... investigated for application as catalysts, sensors, drug ... in photonics and molecular electronics. Gaining knowledge ... physical and chemical properties, has been challenging. ... demonstrated that high-resolution electron microscopy can be ... which all gold atoms are observed. The ...
(Date:8/22/2014)... 2014 Research and Markets has ... Gel Permeation Chromatography (GPC) Industry Report 2014" report ... China Gel Permeation Chromatography (GPC) Industry Report is a ... the global gel permeation chromatography industry with a focus ... basic overview of the industry including definitions, classifications, applications ...
(Date:8/22/2014)... Nerium International, the go-to, buzzworthy ... spotlight again. Nerium will showcase its signature NeriumAD® ... Contouring Cream to Hollywood’s elite at the official ... 66th Primetime Emmy® Awards. , Developed from cutting-edge ... trials show that NeriumAD night cream dramatically reduces ...
Breaking Biology Technology:Treatment for overactive bladder and irritable bowel syndrome advanced through pioneering research 2A breakthrough in imaging gold nanoparticles to atomic resolution by electron microscopy 2Global and China Gel Permeation Chromatography (GPC) Industry Report 2014 2Nerium International Joins Television’s Biggest Stars at Backstage Creations Giving Suite at the 66th Primetime Emmy Awards 2Nerium International Joins Television’s Biggest Stars at Backstage Creations Giving Suite at the 66th Primetime Emmy Awards 3
...  Mars, Incorporated, as an official partner of TEDMED ... its Petcare, Chocolate, Wrigley, Food and Symbioscience businesses ... food companies, it is seeking to improve physical, ... and collaboration. TEDMED ( www.tedmed.com ) ...
... (NASDAQ: SPEX ) – an innovator ... and atherosclerosis, and providers of technical and regulatory ... companies – would like to remind investors and ... call to provide a business update and answer ...
...  Psyche Systems Corporation has recently signed a strategic ... WindoPath®, Psyche,s award winning Anatomic Pathology solution, will ... NOVIUS® Lab, Siemens laboratory information system. ... that is built on a contemporary architecture that ...
Cached Biology Technology:Mars, Incorporated Answers Question: 'How Does Feeding People and Pets Nurture Science and Discovery?' At TEDMED 2012 2Mars, Incorporated Answers Question: 'How Does Feeding People and Pets Nurture Science and Discovery?' At TEDMED 2012 3Mars, Incorporated Answers Question: 'How Does Feeding People and Pets Nurture Science and Discovery?' At TEDMED 2012 4Reminder: Spherix to Hold Business Update Conference Call April 11 at 1:00 p.m. Eastern Time 2Reminder: Spherix to Hold Business Update Conference Call April 11 at 1:00 p.m. Eastern Time 3Psyche Systems Corporation Signs Strategic Alliance with Siemens Healthcare to Provide Anatomic Pathology Solutions 2
... to reward the animal for foraging behavior.The Spatial ... built around a video camera, frame grabber, and ... fields at once and up to 6 moving ... records them, but also allows video replay of ...
tracking dye in electrophoresis; free acid, C 19 H 10 BrO 5 S; MW: 669.96...
... The Rice Oligo Microarray, 22K ... of rice genes associated with biological ... abiotic stress response. Each microarray contains ... of the rice (japonica) genome focuses ...
... Last innovation from Magnetofection technology, SilenceMag ... system available. Simple, rapid and easy ... and non toxic. Specifically designed for ... silencing at very low doses of ...
Biology Products: