Navigation Links
Scientists find microRNAs regulate plant development

s on the hypocotyl (stem just above the root) when treated with auxin but the ago1 mutants do not. Dr. Bellini and her colleagues found that the mutant plants over-accumulate ARF17 mRNA within the hypocotyl, pointing to ARF17 as a major regulator of adventitious rooting and microRNA-mediated regulation as a major regulator of ARF17.

In a third report, Dr. Nam-Hai Chua of Rockefeller University in New York and scientists at the Temasek Life Science Laboratories, Singapore, and the Chinese Academy of Sciences in Beijing show that microRNA is important in the regulation of a transcription factor that is induced by auxin, called NAC1. NAC1 functions in other aspects of the auxin response, such as the formation of lateral roots (roots that grow off the main tap root below ground, as opposed to the adventitious roots that grow off of the stem or other above-ground plant parts). Like ARF17, NAC1 mRNA contains a stretch of sequence that is complementary to microRNAs, and thus shows potential for microRNA-mediated regulation. In experiments analogous to those of Bartel's group, Chua and colleagues created transgenic Arabidopsis plants that produce a version of NAC1 that is resistant to microRNA-mediated cleavage. Compared to wild-type plants, the transgenic plants overaccumulated NAC1 mRNA and produced more lateral roots. It was also found that accumulation of the microRNA that targets NAC1 mRNA is induced by auxin. The pattern of induction suggested a model wherein auxin induction of NAC1 mRNA is later followed by induction of the microRNA responsible for NAC1 mRNA cleavage. MicroRNA-mediated regulation of gene expression therefore appears to be an important mechanism for fine-tuning auxin signaling during plant development.

These reports provide significant new information on microRNA-mediated regulation of plant development and show that microRNAs play important roles in regulating the auxin response pathway.

You can read the full report News and R
'"/>

Source:American Society of Plant Biologists


Page: 1 2 3 4

Related biology news :

1. Scientists ID molecular switch in liver that triggers harmful effects of saturated and trans fats
2. Scientists Replicate Hepatitis C Virus in Laboratory
3. Scientists detect probable genetic cause of some Parkinsons disease cases
4. Scientists find missing enzyme for tuberculosis iron scavenging pathway
5. Scientists seek answers on what activates deadly anthrax spores
6. Yale Scientists Find MicroRNA Regulates Ras Cancer Gene
7. Scientists collaborate to assess health of global environment
8. Scientists decipher genome of fungus that can cause life-threatening infections
9. Scientists discover the cellular roots of graying hair
10. Scientists rid stem cell culture of key animal cells
11. Scientists develop new color-coded test for protein folding
Post Your Comments:
(Date:8/20/2008)...ust 20, 2008) Today, the U.S. Environmental Protec...ion grant to the University of Kentucky (UK) to in...s affect their ability to enter the brain. This i...) grant ever awarded to the University of Kentucky...by EPA STAR for nanotechnology research. , "Nan...
(Date:8/20/2008)... tumor suppressor gene controls numerous biologica...wth and death. But PTEN is frequently lost or muta...among various types of human cancer that PTEN has ...umor suppressors. , Now, a study led by research...) and Harvard Medical School provides important n...
(Date:8/20/2008)... Genome Research Institute (NHGRI), part of the Na...ore than $20 million in grants to develop innovati...nt enough to sequence a person,s DNA as a routine ..."The ability to comprehensively sequence any perso...sher in an age of personalized medicine where heal...
(Date:8/19/2008)...iversity of Oklahoma researchers began studying th... that has plagued the energy industry for decades,...nity of microorganisms capable of converting hydro...nd that the groundbreaking processknown as anaerob...methane gas production from older, more mature oil...
Breaking Biology News(10 mins):$2M grant awarded to University of Kentucky for research on nanoparticles and human health 2New insights into the regulation of PTEN tumor suppression function 2NHGRI seeks DNA sequencing technologies fit for routine laboratory and medical use 2NHGRI seeks DNA sequencing technologies fit for routine laboratory and medical use 3NHGRI seeks DNA sequencing technologies fit for routine laboratory and medical use 4NHGRI seeks DNA sequencing technologies fit for routine laboratory and medical use 5OU researchers isolate microorganisms that convert hydrocarbons to natural gas 2OU researchers isolate microorganisms that convert hydrocarbons to natural gas 3New X ray technique targets terrorists and tumors 1398 1New X ray technique targets terrorists and tumors 1398 2More Young Americans Are Contracting HIV 7278 1More Young Americans Are Contracting HIV 7278 2More Young Americans Are Contracting HIV 7278 3More Young Americans Are Contracting HIV 7278 4More Young Americans Are Contracting HIV 7278 5AHF Marks World AIDS Day with US Global Events 3B Focus on Wider HIV Testing and Treatment Access 7274 1AHF Marks World AIDS Day with US Global Events 3B Focus on Wider HIV Testing and Treatment Access 7274 2AHF Marks World AIDS Day with US Global Events 3B Focus on Wider HIV Testing and Treatment Access 7274 3Vical Presentation at Military Pandemic Influenza Workshop 2019 1Vical Presentation at Military Pandemic Influenza Workshop 2019 2
...liding reptile Mecistrotrachelos apeoros. Curved f...ones of a previously unknown, 220 million-year-old...mbedded in stone, but thanks to an industrial-size...e Imaging, the bone structure and behavior of thes...ng reptile is named Mecistrotrachelos apeoros mean...
...h to keep an avian marriage together for the Nazca...s Islands off the coast of Ecuador. , Many Nazca b...ng a chick, according to a Wake Forest University ...ceedings of the Royal Society B: Biological Scienc...is an advantage to staying together, said Terri Ma...
...anzees’ cognitive abilities, according to new rese...hio State University. The study (1) is the first ... cultural environment enhances their cognitive abi... how tools work. The findings have just been publ...ion. , The scientists compared three groups of chi...
...t common bacteria can deliver a valuable cargo of ...ition sensors, drugs or DNA for the early diagnosi...ach represents a potential way to overcome hurdles...ere they could be used as an alterative technology...r at Purdue,s Birck Nanotechnology Center. , Th...
Other Biology News:CT scan reveals ancient long-necked gliding reptile 2Study investigates 'divorce' among Galapagos seabirds 2Nurtured chimps rake it in 2Bacteria ferry nanoparticles into cells for early diagnosis, treatment 2Bacteria ferry nanoparticles into cells for early diagnosis, treatment 3
(Date:8/21/2008)... NEW YORK, MUNICH, Germany and AMSTERDAM, Neth...thcare and SpePharm Holding, B.V., the,pan-Europea...d that they,have entered into a euro 10 million re...fund SpePharm,s acquisition of Dantrium(R) for Eur...le Pharmaceuticals. At the same,time, TVM Capital,...
(Date:8/20/2008)... VIENNA, Va., Aug. 20 /PRNewswire-USNewswire/ ...0 ranking of the fastest-growing private companies...T) services provider,MicroTech, ranks No. 285 on ... 2008 Inc. 500 list measures revenue growth from 2...U.S.-based, privately held, independent -,no subsi...
(Date:8/20/2008)... INDIANAPOLIS, Ind., Aug. 20 /PRNewswire-First... announced that it has completed the acquisition,o...n Diego-based,biotechnology company focused on dru...y. The completion of the deal followed today,s Spe...SGX stockholders voted in,favor of the merger agre...
(Date:8/20/2008)... Growth Fueled by Popularity with Seniors and ... Marketing, CAMBRIDGE, Mass., Aug. 20 /PRNewswi...hole Health (SWH), a voluntary health care plan fo...ng private company in the,United States., Part of...rowing,companies, SWH had revenue growth of 31,000...
Breaking Biology Technology:TVM Capital, Signet Healthcare Partners and Paul Capital Healthcare Enter into euro 26 Million Financing of SpePharm 2TVM Capital, Signet Healthcare Partners and Paul Capital Healthcare Enter into euro 26 Million Financing of SpePharm 3TVM Capital, Signet Healthcare Partners and Paul Capital Healthcare Enter into euro 26 Million Financing of SpePharm 4TVM Capital, Signet Healthcare Partners and Paul Capital Healthcare Enter into euro 26 Million Financing of SpePharm 5MicroTech Ranks No. 285 on Inc. Magazine's 2008 List of the 500 Fastest Growing Private Companies in America 2Lilly Announces Completion of SGX Acquisition 2Inc. Magazine Names Senior Whole Health the Number One Fastest-Growing Private Company in US 2Inc. Magazine Names Senior Whole Health the Number One Fastest-Growing Private Company in US 3
...gs do count. Lucigen Corporation, which specialize...ed $300,000 in initial investor funding. The Middl... of $1 million through equity financing and a Nat...ue to develop cloning technology that has been dee...re developing the next generation of cloning, with...
...ider of X-ray solutions for the life and materials...ected to participate in the $22.2 million Cyttron ...roject is half-funded by the Dutch government, and... expects to receive approximately $950,000 in matc...e development of a "super microscope," dubbed the ...
...y has yet to hit its growth spurt so whats taking ... Madison has what it takes to support a high-tech ...n as successful as other regions? , , Accelerate M...Madisons business climate through information tech...its monthly meeting at the University of Wisconsin...
... cant help thinking of the second verse from "Blo...ility to confront what is really happening all aro...he media starts hyping yet another new business im...g was all the rage. Anyone hesitating to reenginee...t to the dustbin of history. Or so it was believed...
Other Biology Technology:Lucigen Receives Funding, Breaks New Ground with Enzyme Research 2Tech Business Leaders Compare Madison to Other Regions 2Tech Business Leaders Compare Madison to Other Regions 3Tech Business Leaders Compare Madison to Other Regions 4Offshore Outsourcing: On Target or Off Base? 2Offshore Outsourcing: On Target or Off Base? 3
... antibiotic-based selection system for recombinant...ely on colony survival, eliminating the need for c...process provides close to 100% accuracy in recombi...orm for robot colony picking. This cloning kit can...
...ts revolutionizes imaging software for the microsc...microscopes, cameras, components and peripherals w...d achiving tools. Its intuitive interface simplifi...while providing powerful features such as image st...
BD BioCoat Vented Caps for 175 cm2 Flasks
BD BioCoat Laminin 60 mm Culture Dishes, tissue-culture treated polystyrene with a uniform application of mouse laminin.
Biology Products: