Navigation Links
How the plant immune system can drive the formation of new species
Date:9/3/2007

Plant geneticists know that not all plants from the same species can be successfully bred. Apparently, there are reproductive barriers that not only prevent the exchange of genes between well-established species (which goes to the very definition of a species), but also between varieties of one and the same species. How these barriers arise is of central importance if one wants to understand the origin of biodiversity. A research team led by Detlef Weigel from the Max Planck Institute of Developmental Biology in Germany and Jeff Dangl from the University of North Carolina has now shown that a mis-regulated plant immune system can establish reproductive barriers and might be a first step toward speciation.

The international collaboration studied a genetic incompatibility known as hybrid necrosis, using thale cress, Arabidopsis thaliana. The new study, reported in the latest edition of the open-access journal PLoS Biology, was based on the observation that unfit hybrids arising in different plant species are very similar. Their growth is retarded, the leaves become yellow and necrotic, the tissue collapses, and they often do not survive to make flowers; the syndrome is generally known as hybrid necrosis. We suspected that hybrid necrosis is always caused by the same biochemical mechanism, explains Weigel, director at the Max Planck Institute.

To test this hypothesis, the scientists took 280 genetically different strains of Arabidopsis from all over the world, which they crossed in 861 different combinations. Most of the hybrid plants were strong and grew normally, but 20or two percentof the crosses produced only small necrotic and unhealthy plants. Genomics-based experiments showed that these hybrids all had a comparable profile of gene activity: A common group of some 1000 genes were either more strongly or more weakly active in the hybrids than in their healthy parents. Moreover, this pattern was very similar to what is seen with a stron
'/>"/>

Contact: Natalie Bouaravong
press@plos.org
415-568-3445
Public Library of Science
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Quantum Dots Research Leads to New Knowledge about Protein Binding in Plants
2. Key molecule in plant photo-protection identified
3. Plants, animals share molecular growth mechanisms
4. Plants respond similarly to signals from friends, enemies
5. Affymetrix Unveils Plans to Double Plant and Animal Genome Microarray Offering
6. Transplantation Of Monkey Embryonic Stem Cells Reverses Parkinson Disease In Primates
7. Emory Eye Center Implants Its First Retinal Chips In Patients With Retinitis Pigmentosa
8. Plant hemoglobins: Oxygen handlers critical for nitrogen fixation
9. Circles Of DNA Might Help Predict Success Of Stem Cell Transplantation
10. Plants defy Mendels inheritance laws, may prompt textbook changes
11. Antibodies from plants protect against anthrax
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:8/21/2014)... 2014 Nxt-ID, Inc. (OTCQB: NXTD), a biometric ... announced today that its shares of common stock and ... in its proposed underwritten public offering of common stock ... Nasdaq Capital Market, subject to closing of its proposed ... and will trade under the symbol "NXTD" and "NXTDW," ...
(Date:8/21/2014)... a previously unknown process for harvesting energy and producing ... Penn State University scientist has discovered. The discovery lays ... growth, harvesting energy from the Sun, and understanding dense ... other lakes worldwide. A paper describing the discovery will ... of the journal Science on 21 August ...
(Date:8/21/2014)... easy to ignore, but they are the ultimate source ... Humans are increasingly dependent on algae, too, to suck ... it to the bottom of the ocean. Now, by ... researchers have evidence showing that viruses infecting those algae ... even when all else stays essentially the same, and ...
Breaking Biology News(10 mins):Nxt-ID Approved for NASDAQ Capital Market Listing 2Nxt-ID Approved for NASDAQ Capital Market Listing 3Hot-spring bacteria reveal ability to use far-red light for photosynthesis 2Hot-spring bacteria reveal ability to use far-red light for photosynthesis 3Viruses take down massive algal blooms, with big implications for climate 2
... (hNoV), also known as the winter vomiting bug, is one ... virus is highly contagious, causing vomiting and diarrhea, and the ... cure; sufferers have to let the virus run its course ... is frequently associated with outbreaks of hNoV but it remains ...
... The human skin is home to countless microorganisms that we ... Our invisible passengers known as the skin microbiome - ... immune system, protecting us from pathogens, and mediating skin disorders. ... is transmitted between players in a contact sport, using roller ...
... in French . Researchers at the University ... discovered a new mechanism that allows some cells in our body ... by Roman soldiers depicted in the Asterix series. Collective cell migration ... but it is also used by cancerous cells to disseminate efficiently ...
Cached Biology News:What impact does a day of roller derby have on our skin microbiome? 2Asterix's Roman foes -- Researchers have a better idea of how cancer cells move and grow 2
(Date:8/21/2014)... Wednesday of last week RENU 28, the world's first and ... for purchase in Australia and New Zealand, and the response ... is, if you think about the definition of aging, it's ... within your body. If you think about the definition of ... What RENU 28 does is it works with these tiny ...
(Date:8/20/2014)... Neurotrope, Inc. (OTCQB: NTRP) today announced ... provide an update on Company activities. Access information:Date:Tuesday, ... 505-4369 (U.S. and Canada) or (719) 325-2315 Conference ... under "Investor Relations"The teleconference replay will be available ... 2014 at (888) 203-1112 (U.S. and ...
(Date:8/20/2014)... Toronto, Canada (PRWEB) August 20, 2014 ... wisdom that E&L studies should be performed late in ... system is known. But current regulatory trends suggest that, ... are on the rise. In recent years, multiple drug ... E&L packages or address specific questions during phase I/II. ...
(Date:8/19/2014)... August 20, 2014 One of ... medicine is an inadequate vascular supply. Nutrient and ... decellularized tissues is critical for successful regeneration and ... to mitigate deficiencies in vascularization and promote angiogenesis ... bioactivity, optimizing scaffold design and architecture, and enhancing ...
Breaking Biology Technology:RENU 28 Skin Care Now Available in Australia and New Zealand 2Neurotrope To Host Conference Call 2Are Extractable and Leachables going Phase-Appropriate? New Webinar Hosted by Xtalks 2Vascularization in Tissue Engineering Highlighted at 12th New Jersey Symposium on Biomaterials Science 2
... Helix BioPharma Corp. (TSX, FSE: "HBP") announced ... in Germany to initiate its planned Phase II ... with low-grade cervical lesions.The clinical study was designed, ... on the absorption and elimination profile of Topical ...
... Percent of Outstanding Indevus Shares Have Been Accepted ... Pharmaceuticals (Nasdaq: ENDP ) announced today ... time, on March 13, 2009, approximately 71,008,964 shares ... were validly tendered and accepted for purchase in ...
... PortfolioNEW YORK, March 16 Samtheo Biopharma LLC ... subsidiary, Lyndor Biosciences LLC, with Moffitt Cancer Center, ... that selectively inhibits the activation of all three ... pathway has been found to play an important ...
Cached Biology Technology:Helix BioPharma Receives Approval to Initiate Phase II Pharmacokinetic Clinical Study of Topical Interferon Alpha-2b in Patients with Low-Grade Cervical Lesions 2Helix BioPharma Receives Approval to Initiate Phase II Pharmacokinetic Clinical Study of Topical Interferon Alpha-2b in Patients with Low-Grade Cervical Lesions 3Helix BioPharma Receives Approval to Initiate Phase II Pharmacokinetic Clinical Study of Topical Interferon Alpha-2b in Patients with Low-Grade Cervical Lesions 4Helix BioPharma Receives Approval to Initiate Phase II Pharmacokinetic Clinical Study of Topical Interferon Alpha-2b in Patients with Low-Grade Cervical Lesions 5Endo Pharmaceuticals Extends Subsequent Offering Period for Indevus Shares Until 5:00 pm EDT on Wednesday, March 18, 2009 2Endo Pharmaceuticals Extends Subsequent Offering Period for Indevus Shares Until 5:00 pm EDT on Wednesday, March 18, 2009 3Samtheo Announces License Agreement with Moffitt Cancer Center for Exclusive Rights to Novel Akt Inhibitor 2Samtheo Announces License Agreement with Moffitt Cancer Center for Exclusive Rights to Novel Akt Inhibitor 3
Mouse monoclonal [1C6/2] to Rad17 ( Abpromise for all tested applications). entrezGeneID: 5884 SwissProtID: Q9UPF5...
... Spin Columns contain a proprietary high-performance desalting ... desalting and protein-recovery characteristics compared to other ... as 25 g/ml of protein can be ... 95% retention of salts and other small ...
Rabbit polyclonal to VPAC2 ( Abpromise for all tested applications). entrezGeneID: 7434 SwissProtID: P41587...
... Immunogen: ... acids 22-37 SGHKSEEKREKMKRTL Antigen ... G-protein signalling; Antigen Subfamily: ... G-protein signalling Recommended Storage: ...
Biology Products: