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:8/19/2015)... , Aug. 19, 2015  VOXX International Corporation ... has entered into a Definitive Agreement to purchase ... iris authentication market leader EyeLock through an acquiring ... have a controlling interest in the acquiring entity. ... completion of due diligence.  Expanding on its existing ...
(Date:8/12/2015)... 12, 2015   MedNet Solutions , an innovative ... of clinical research, is proud to announce that ... SaaS-based eClinical technology platform, has led the way to ... quarters of 2015.   Q2 2015 and Q1 2015 ... by contract value sold in the company,s 15 year ...
(Date:8/11/2015)... Today, ZUK announced its Android smartphone Z1, featuring FPC,s touch ... 2015 that relate to sales of FPC1155 for this smartphone model ... for 2015. Jörgen Lantto, CEO of FPC, comments: " ... manufacturer in China and we are proud ... for Z1 , its first ...
Breaking Biology News(10 mins):VOXX International Corporation Signs Definitive Agreement To Acquire The Assets And A Controlling Interest Of Biometric Leader EyeLock 2VOXX International Corporation Signs Definitive Agreement To Acquire The Assets And A Controlling Interest Of Biometric Leader EyeLock 3VOXX International Corporation Signs Definitive Agreement To Acquire The Assets And A Controlling Interest Of Biometric Leader EyeLock 4VOXX International Corporation Signs Definitive Agreement To Acquire The Assets And A Controlling Interest Of Biometric Leader EyeLock 5MedNet Solutions Experiences Explosive Corporate Growth 2FPC's Touch Fingerprint Sensor FPC1155 in ZUK's Smartphone Z1 2
... Rochelle, NY, September 1, 2010Biopharmaceutical firms and ... steps toward creating greener working environments and ... Engineering & Biotechnology News (GEN). This ... series of presentations and panel discussions that ...
... Biophysicists in Bochum have discovered a diode for protons: ... flow of electric current, the "proton diode" ensures that ... one direction. Water molecules play an important role here ... by Prof. Dr. Klaus Gerwert (Chair of Biophysics at ...
... reintroduction of wolves to Yellowstone National Park in 1995 is helping ... elk hungry for winter food had a different idea. They did ... of fear." According to a study set ... of the Ecological Society of America, the fear of wolf predation ...
Cached Biology News:GEN reports on the greening of the life sciences 2Bochum's researchers discover proton diode 2Are wolves saving Yellowstone's aspen trees from elk? 2Are wolves saving Yellowstone's aspen trees from elk? 3
(Date:8/27/2015)... Aug. 27, 2015 The National Necrotizing ... eyes—and life—were saved by doctors at Vanderbilt University Hospital ... NNFF, NovaBay Pharmaceuticals and Dr. John Crew , ... at Seton Medical Center in Daly City, ... a breakthrough approach, pioneered by Dr. Crew, that had ...
(Date:8/27/2015)... Inc. (TSXV: BRM) ("Biorem" or "the Company") today announced its results ... complete second quarter financial statements and MD&A have been filed on ... per shareThree-months ended , Six -months endedJune 30 , June 30 ... 2014 Revenue , 4,709 , 2,459 ... 1,656 , 56 , 3,188 , ...
(Date:8/27/2015)... YORK , August 27, 2015 ... enhancing image processing functions in the human vision system, announced ... point guard Chris Paul to develop ... players who want to improve their real-life on-court performance. ... the court, whether it is shooting a ball or blocking ...
(Date:8/27/2015)... ... 2015 , ... METTLER TOLEDO's web-based EasyFinder™ tool ... to a manageable shortlist of bench and floor scales and terminals. Specifying a ... with the customer’s industry and application. , Side-by-side product comparisons and an ...
Breaking Biology Technology:Patient's Life and Eyes Saved from Gruesome Flesh-Eating Infection Consuming Her Face 2Patient's Life and Eyes Saved from Gruesome Flesh-Eating Infection Consuming Her Face 3BIOREM Reports $718,000 Net Earnings for the Second Quarter 2BIOREM Reports $718,000 Net Earnings for the Second Quarter 3Eight-Time All-Star Chris Paul and GlassesOff Partner to Develop Innovative Mobile App Designed to Improve On-Court Performance 2Eight-Time All-Star Chris Paul and GlassesOff Partner to Develop Innovative Mobile App Designed to Improve On-Court Performance 3METTLER TOLEDO Updates Online Scale Selection Tool 2
... ... about fast, new treatment program for FIV and FELV , ... New York, N.Y. (PRWEB) November 4, 2009 -- IMULAN BioTherapeutics, LLC ... fast way to get LTCI for feline immunodeficiency virus (FIV) and feline leukemia virus (FeLV). ...
... ... To Target Tissues Affected by Osteoarthritis. Physics and Biology are Natural Partners in the ... ... medical device, the MyPhield Arthritis Therapy Cushion that naturally relieves osteoarthritis without causing unwanted ...
... Nov. 3 VIVUS, Inc. (Nasdaq: VVUS ... of novel therapeutic products, today reported its highlights and financial ... , Third Quarter Highlights , In ... two final, phase 3 pivotal 56-week studies, EQUIP (OB-302) and ...
Cached Biology Technology:New Program Developed in the Fight Against Feline Aids 2New Technology Now Available In Canada For Osteoarthritis 2VIVUS Reports Third Quarter 2009 Highlights and Financial Results 2VIVUS Reports Third Quarter 2009 Highlights and Financial Results 3VIVUS Reports Third Quarter 2009 Highlights and Financial Results 4VIVUS Reports Third Quarter 2009 Highlights and Financial Results 5VIVUS Reports Third Quarter 2009 Highlights and Financial Results 6VIVUS Reports Third Quarter 2009 Highlights and Financial Results 7VIVUS Reports Third Quarter 2009 Highlights and Financial Results 8
... This product is expected to react ... species but has not been specifically ... precipitin line against partially purified rabbit ... react with all forms of Pyruvate ...
Rabbit polyclonal to Somatostatin 28 ( Abpromise for all tested applications). entrezGeneID: 6750 SwissProtID: P61278...
... Convenient platform for tube handling and reagent ... 0.2ml V-bottom tubes - 96 x ... - Thermo-Fast® 96 Non-Skirted Plate ... - 48 x 0.5ml Thermo-Tubes Multiple workstations can be ...
... Pro upgrade for Shimadzu Phoretix 2D, Expression ... statistical tools for comparative gel analysis studies ... Data base add on component ... version 9i release 2 client software). ...
Biology Products: