Navigation Links
Dangerous liaisons
Date:9/22/2007

This release is available in German.

Plant geneticists and animal breeders alike know the problem: single individuals or entire broods will not thrive, some die early, or remain, even if they survive, the runts of the litter and thus not useful for continued breeding programs. What is annoying for the breeder, fascinates geneticists and molecular biologists. The unfit offspring are an example that genetic material cannot always be combined at will. Apparently there are reproductive barriers that not only prevent the exchange of genes between well established 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 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 work, reported in the latest edition of PLoS Biology, was based on the observation that unfit hybrids from 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 20 - or two
'/>"/>

Contact: Professor Dr. Detlef Weigel
weigel@tuebingen.mpg.de
49-707-160-11411
Max-Planck-Gesellschaft
Source:Eurekalert

Page: 1 2 3 4

Related biology news :

1. Too much water may be as dangerous as too little during long-distance athletic events
2. Colorful bacteria more dangerous
3. Dangerous tricksters: Some bacterie use immune cells to reproduce
4. The dangerous legacy of lead
5. Study identifies substances in grapefruit juice that interact dangerously with some drugs
6. Commercial fishing causes dangerous fluctuations in fish populations
7. Newly discovered behavior in cancer cells signals dangerous metastasis
8. Jefferson scientists find high glucose before surgery raises risk of dangerous complications
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/24/2015)... , March 24, 2015   Crossmatch ... solutions, today announced that its U.are.U ® ... retailer Goorin Bros . to achieve PCI ... solution secures access to the POS terminal, protecting ... risk of data breaches. With ...
(Date:3/20/2015)... --Research and Markets ( http://www.researchandmarkets.com/research/4stcg3/india_sensors ) ... Sensors Market Forecast and Opportunities 2020" report ... is projected to grow at a CAGR over ... industrial and healthcare sectors are the key application ... adoption of MEMS technology in sensors is growing ...
(Date:3/18/2015)... , March 18, 2015 As ... businesses, new revolutionary smart wallets and apps continue to be ... currently entrenched in the mobile payment industry in focus today ... Holding Ltd. (NYSE: BABA ), Apple Inc. (NASDAQ: ... ) and Facebook Inc. (NASDAQ: FB ) ...
Breaking Biology News(10 mins):Crossmatch Fingerprint Readers Help Retailer Prevent Data Breaches at Point-of-Sale 2India Sensors Market Forecast and Opportunities 2020 - STMicroelectronics held the largest share in 2014 2India Sensors Market Forecast and Opportunities 2020 - STMicroelectronics held the largest share in 2014 3Revolutionary 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 6
... become embedded in genomic DNA, which contains the complete ... for cells. It is known that ribonucleotides in DNA ... genomic instability and altered DNA metabolism, but not much ... A new study provides a mechanistic explanation of how ...
... MD -- The Biophysical Society has announced the ... to attend the Biophysical Society,s 56th Annual Meeting ... Diego, California, February 25-29, 2012. The purpose of ... interaction between American biophysicists and scientists working in ...
... can lead to climate change adaptation practices in ... "Climate-smart agriculture has the potential to increase sustainable ... climate impacts and mitigate climate change through greenhouse ... Neufeldt the lead expert on climate change at ...
Cached Biology News:Study identifies mechanisms cells use to remove bits of RNA from DNA strands 2Biophysical Society Announces winners of 2012 International Relations Committee travel awards 2Biophysical Society Announces winners of 2012 International Relations Committee travel awards 3Biophysical Society Announces winners of 2012 International Relations Committee travel awards 4Climate-smart agriculture should be livelihood-smart too 2Climate-smart agriculture should be livelihood-smart too 3
(Date:4/20/2015)... -- - Development of a Novel Taxane ... Platform - To be Presented on Tuesday, Apr 21, ... of Antibody-drug Conjugates Using an anti-HER2 Monoclonal Antibody and ... 19, 1:00 PM EST Invictus Oncology Private ... that the company,s novel computational platform technology (VOLVOX) for ...
(Date:4/20/2015)... Global Stem Cells Group today announced ... gathering of aesthetic medicine experts and innovators. GSCG Advisory ... the company’s brand new training course that combines facial ... , The course is designed to address the ... including facial aging caused by volume loss. , ...
(Date:4/17/2015)... PA (PRWEB) April 17, 2015 ... a leader in regulatory data management, preparation, and submission ... today the availability of a new Lot Distribution Report ... are required to remain compliant with the FDA’s new ... by the FDA to monitor the volume and timing ...
(Date:4/17/2015)... , April 17, 2015  US-Australian drug discovery company, ... Memorandum of Understanding with the Feinstein Institute for ... York to collaborate with the objective ... The collaboration brings together the drug discovery ... expertise of the Feinstein Institute in neurosciences and ...
Breaking Biology Technology:Invictus Oncology Announces Two Posters to be Presented Describing its Platform Technology on Supramolecular Therapeutics at the American Association for Cancer Research Annual Meeting, 2015 2Global Stem Cells Group to Host Featured Speaker at The Aesthetic Meeting 2015 in Montreal 2Global Stem Cells Group to Host Featured Speaker at The Aesthetic Meeting 2015 in Montreal 3Reed Tech Announces FDA Lot Distribution Report (LDR) Service for Manufacturers of Biologic Products 2Reed Tech Announces FDA Lot Distribution Report (LDR) Service for Manufacturers of Biologic Products 3Novogen and Feinstein Institute Join Forces to Find Effective Treatments for Brain Cancer 2Novogen and Feinstein Institute Join Forces to Find Effective Treatments for Brain Cancer 3Novogen and Feinstein Institute Join Forces to Find Effective Treatments for Brain Cancer 4Novogen and Feinstein Institute Join Forces to Find Effective Treatments for Brain Cancer 5Novogen and Feinstein Institute Join Forces to Find Effective Treatments for Brain Cancer 6
... 3 Catalyst,Pharmaceutical Partners, Inc. (Nasdaq: CPRX ... and commercializes prescription,drugs for the treatment of drug ... J. McEnany, Chief Executive,Officer, will be presenting an ... 10th Annual Global Investment Conference on Tuesday, November ...
... - Oncolytics Biotech Inc. (TSX:,ONC, NASDAQ: ONCY) announced ... its U.K. combination REOLYSIN(R) and docetaxel clinical trial,for ... of the Royal Surrey Hospital, U.K., presented the,results ... Cancer,(iSBTC) annual meeting on November 1, 2008. The ...
... AEterna Zentaris Inc.,(NASDAQ: AEZS ; TSX: AEZ), ... oncology, today reported that it has entered the,second ... trial in endometrial,cancer with AEZS-108, a luteinizing hormone-releasing ... enter the second stage of,patient recruitment was taken ...
Cached Biology Technology:Catalyst Pharmaceutical Partners to Present at the Rodman & Renshaw 10th Annual Global Investment Conference 2Oncolytics Biotech Inc. Collaborators Present Positive Combination REOLYSIN(R) and Docetaxel Results at iSBTc Annual Meeting 2Oncolytics Biotech Inc. Collaborators Present Positive Combination REOLYSIN(R) and Docetaxel Results at iSBTc Annual Meeting 3Oncolytics Biotech Inc. Collaborators Present Positive Combination REOLYSIN(R) and Docetaxel Results at iSBTc Annual Meeting 4AEterna Zentaris Reaches 2nd Stage of Patient Recruitment for Phase 2 Trial in Endometrial Cancer with the Innovative LHRH Receptor Targeted Conjugate, AEZS-108 2AEterna Zentaris Reaches 2nd Stage of Patient Recruitment for Phase 2 Trial in Endometrial Cancer with the Innovative LHRH Receptor Targeted Conjugate, AEZS-108 3AEterna Zentaris Reaches 2nd Stage of Patient Recruitment for Phase 2 Trial in Endometrial Cancer with the Innovative LHRH Receptor Targeted Conjugate, AEZS-108 4AEterna Zentaris Reaches 2nd Stage of Patient Recruitment for Phase 2 Trial in Endometrial Cancer with the Innovative LHRH Receptor Targeted Conjugate, AEZS-108 5
... are designed for sequencing inserts cloned into ... or T3 RNA polymerase promoters, or lambda ... at a concentration of 0.1 µg/µl in ... DNA sequencing reactions using SequiTherm™ EXCEL™ II ...
BD BioCoat Matrigel Matrix 35 mm Culture Dishes Coating : BD MatrigelTM Basement Membrane Matrix ,Surface : ECM/attachment factors ,Surface area : 9.6 cm2 ,Dim nominal : 35 mm x 10 mm ,Vo...
BD BioCoat Collagen I 35 mm Culture Dishes, tissue-culture treated polystyrene with a uniform application of rat tail collagen type I....
... with AutoGen AutoGenesys, BioRobotics BioPick, BioGrid, TAS ... picking systems This CLS number is a ... Cornings product number. If showing no availability ... number (D9314) or contact customer service for ...
Biology Products: