Navigation Links
Core mechanism for root growth identified
Date:8/25/2014

During plant growth, dividing cells in meristems must coordinate transitions from division to expansion and differentiation. Three distinct developmental zones are generated: the meristem, where the cell division takes place, and elongation and differentiation zones. At the same time, plants can rapidly adjust their direction of growth to adapt to environmental conditions.

In Arabidopsis roots, many aspects of zonation are controlled by the plant hormone auxin and auxin-induced PLETHORA transcription factors. Both show a graded distribution with a maximum near the root tip. In addition, auxin is also pivotal for tropic responses of the roots.

Ari Pekka Mhnen with his group in the Institute of Biotechnology, University of Helsinki, Finland, and Dutch colleagues has now found out with the help of experimentation and mathematical modelling how the two factors together regulate root growth.

"Cell division in the meristem is maintained by PLETHORA transcription factors. These proteins are solely transcribed in the stem cells, in a narrow region within the meristematic cells located in the tip of the root. So PLETHORA proteins are most abundant in the stem cells," Ari Pekka Mhnen says.

Outside the stem cells the amount of PLETHORA protein in the cells halves each time the cells divide. In the end there is so little PLETHORA left in the cells that they cannot stay in the dividing mode. This is when the cells start to elongate and differentiate.

Auxin is the factor taking care of many aspects of root growth. If there is enough PLETHORA in the root cells, auxin affects the rate of root cell division. If there is little or no PLETHORA in the cells, auxin regulates cell differentiation and elongation. In addition to this direct, rapid regulation, auxin also regulates cell division, expansion and differentiation indirectly and slowly by promoting PLETHORA transcription. This dual action of auxin keeps the structure and g
'/>"/>

Contact: Ari Pekka Mähönen
aripekka.mahonen@helsinki.fi
University of Helsinki
Source:Eurekalert  

Page: 1 2

Related biology news :

1. UMN and NYBC research finds potential MERS transmission mechanism between bats and humans
2. Scientists discover biochemical mechanisms contributing to fibromuscular dysplasia
3. Scientists discover new, noncommittal mechanism of drug resistance
4. Molecular mechanisms underlying the prevention of autoim-munity by Roquin revealed
5. Novel type of bird pollination mechanism discovered in South America
6. New technology reveals insights into mechanisms underlying amyloid diseases
7. Mechanism that prevents lethal bacteria from causing invasive disease is revealed
8. New from Garland Science -- now available: Cell Signaling: Principles and Mechanisms
9. The colon has a safety mechanism that restricts tumor formation
10. Researchers develop genetic control mechanism for major livestock pest
11. LSTM researchers identify the complex mechanisms controlling changes in snake venom
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Core mechanism for root growth identified
(Date:10/14/2014)... led by researchers at the University of Massachusetts ... Miller School of Medicine (UMMSM) have identified what ... (manic depressive) disorder, a breakthrough that could lead ... as well as depression and other related mood ... week in Nature Molecular Psychiatry , show ...
(Date:10/14/2014)... takes between 10 and 20 years to develop, ... of intervention if detected early, which may be ... Australian clinical researchers. , Dr Jeremy Humphris ... of Medical Research, analysed medical histories and tumour ... cancer patients, operated on between 1994 and 20122. ...
(Date:10/14/2014)... Stanford University School of Medicine have discovered a link ... activation of muscle stem cells. Cells use autophagy to ... of nutrient deprivation. The scientists report in The ... operational it also seems to assist in the activation ... cells emerge from a quiescent state there is a ...
Breaking Biology News(10 mins):Rare genetic disease protects against bipolar disorder 2Rare genetic disease protects against bipolar disorder 3Early detection window when pancreatic cancer is in the family 2Autophagy helps fast track stem cell activation 2
... Weiblen and colleagues have found a faster way to ... Using a technique called DNA barcoding, which involves the ... and an international team of researchers studied populations of ... DNA barcodes showed that migratory patterns and caterpillar diets ...
... The humble papaya is gaining credibility in Western ... for generations. University of Florida researcher Nam Dang, ... dramatic anticancer effect against a broad range of lab-grown ... and pancreas. The researchers used an extract made from ...
... Subhash Khot, an associate professor at the Courant Institute ... 2010 Alan T. Waterman Award, which is given annually ... science and engineering supported by NSF. The honor includes ... research or advanced study in any field of science. ...
Cached Biology News:Papaya extract thwarts growth of cancer cells in lab tests 2NYU Courant professor wins NSF's Waterman Award 2
(Date:10/18/2014)... October 18, 2014 The Biomass ... in the five years to 2014. The industry's expansion ... energy tax credits that encouraged the use of biomass ... portfolio standards (RPSs), which require local utilities to generate ... total energy portfolio. Increased campaigning for green technology also ...
(Date:10/18/2014)... The report " Cloud Analytics Market ... Speech; Machine; Video; Predictive Analytics: Global Advancements, Delivery ... Analysis (2013 - 2018) ", defines and segments ... segments with an in-depth analysis and forecasting of ... driving this market, various restraints, and opportunities impacting ...
(Date:10/17/2014)... have received a $451,781 Air Force Office of Scientific ... micro- and nano-scale level that will provide clues for ... Mechanical and Aerospace Engineering, said the new technology and ... X-rays of an aircraft,s wing., "We,ll be able to ... look at it on this scale," Huang said. "Certain ...
(Date:10/17/2014)... and HILDEN, Germany ...   , Translational research in cancer ... being presented at the American Society of Human ... 250,000-plus DNA samples linked to Ingenuity ®  Knowledge ... for genomic analysis  Ingenuity ®  Variant ...
Breaking Biology Technology:Biomass Power in the US Industry Market Research Report from IBISWorld Has Been Updated 2Biomass Power in the US Industry Market Research Report from IBISWorld Has Been Updated 3Cloud Analytics Market (by Cloud Business Intelligence & Predictive Analytics) Expected to Cross $16.52 Billion by 2018 - New Report by MarketsandMarkets 2Cloud Analytics Market (by Cloud Business Intelligence & Predictive Analytics) Expected to Cross $16.52 Billion by 2018 - New Report by MarketsandMarkets 3Cloud Analytics Market (by Cloud Business Intelligence & Predictive Analytics) Expected to Cross $16.52 Billion by 2018 - New Report by MarketsandMarkets 4Cloud Analytics Market (by Cloud Business Intelligence & Predictive Analytics) Expected to Cross $16.52 Billion by 2018 - New Report by MarketsandMarkets 5UT Arlington project to detect possible damages in aircraft parts early in process 2QIAGEN Demonstrates Expanded Bioinformatics Workflows at ASHG; Strong Market Adoption as Researchers Analyze Genomic Data on More Than a Quarter-Million Samples in Secure Private Cloud 2QIAGEN Demonstrates Expanded Bioinformatics Workflows at ASHG; Strong Market Adoption as Researchers Analyze Genomic Data on More Than a Quarter-Million Samples in Secure Private Cloud 3QIAGEN Demonstrates Expanded Bioinformatics Workflows at ASHG; Strong Market Adoption as Researchers Analyze Genomic Data on More Than a Quarter-Million Samples in Secure Private Cloud 4QIAGEN Demonstrates Expanded Bioinformatics Workflows at ASHG; Strong Market Adoption as Researchers Analyze Genomic Data on More Than a Quarter-Million Samples in Secure Private Cloud 5QIAGEN Demonstrates Expanded Bioinformatics Workflows at ASHG; Strong Market Adoption as Researchers Analyze Genomic Data on More Than a Quarter-Million Samples in Secure Private Cloud 6
... 18 ,Amsterdam Molecular Therapeutics (Euronext: AMT), a leader in ... will release its financial,results for the full year 2008 ... Time (CET). To discuss these results, the Company will,conduct ... , The dial-in number for ...
... NEWTOWN, Pa., Feb. 18 Jennifer Brownstein, ... been named a 2009 Rising Star by ... Stars are up-and-coming professionals in various sectors ... advertising, public relations, medical education, and market ...
... Feb. 18 A new clinical study published this month ... reports that high-quality patient outcomes for breast-conserving surgery can be ... the few and the most recent studies of its kind ... breast cancer patients in the United States are treated at ...
Cached Biology Technology:AMT to Release Full Year 2008 Results on February 24, 2009 2Jennifer Brownstein, of CONNEXION Healthcare, Honored as 'Rising Star' by Healthcare Businesswomen's Association 2New Study Reports Improved Patient Outcomes for Breast Cancer Patients 2New Study Reports Improved Patient Outcomes for Breast Cancer Patients 3
Request Info...
... CultureWell cell culture systems provide ... cultured cells for staining and ... silicone gaskets preassembled with standard ... plates. The entire system is ...
... Captivate magnetic separator for ... used in conjunction with the ... C-21476) or other magnetic particles ... 96-well microplates. Cell Biology Cell ...
ANTI L-DOPA...
Biology Products: