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:7/2/2015)... , June 25, 2015 ... the addition of the "Natural Language Processing ... (Recognition, IVR, OCR, Pattern & Image Recognition) - ... offering. The key vendors occupying the ... IBM Corporation, Microsoft Corporation, NetBase Solutions, SAS Institute ...
(Date:6/30/2015)... , June 30, 2015 Genisphere ... company as CEO to help further develop Genisphere,s therapeutics ... of partnering experience, having spent much of the last ... Therakine, Amgen, Baxter Bioscience, and Johnson & Johnson. Tom ... on Technology and Biotech Corporate Finance. He graduated from ...
(Date:6/25/2015)... CITY , June 25, 2015  Imagine a ... steps toward a healthier, happier life. That,s exactly what ... designed to do. The cutting-edge, portable health program provides ... real-life solutions to help improve your lifestyle and nutrition. ... awards dinner and gala Wednesday night, USANA,s THA was ...
Breaking Biology News(10 mins):Natural Language Processing Market by Type (Rule-Based, Statistical, and Hybrid), Technologies (Recognition, IVR, OCR, Pattern & Image Recognition) - Worldwide Forecast to 2020 2Genisphere Appoints New CEO, Thomas Bliss 2Genisphere Appoints New CEO, Thomas Bliss 3@USANAinc's Personalized Nutrition Program Wins Industry Innovation Award 2
... cells communicate with each other and how to enhance ... promising work by a Kansas State University researcher. ... of diagnostic medicine and pathobiology at K-State,s College of ... National Institutes of Health to continue her cancer research. ...
... postmenopausal hormone therapy for more than 15 years increases ... leaner women according to research at the Keck School ... An analysis of the California Teachers Study focused ... women for nearly 10 years. The research was conducted ...
... Georgia Institute of Technology have attained very promising results on ... Using a new technique involving mass spectrometry of a single ... ovarian cancer in 100 percent of the patients tested. The ... Epidemiology, Biomarkers, & Prevention Research . "Because ovarian ...
Cached Biology News:K-State professor's cancer research gets boost from National Institutes of Health 2K-State professor's cancer research gets boost from National Institutes of Health 3Cancer risk found for long-term hormone therapy 2Initial trials on new ovarian cancer tests exhibit extremely high accuracy 2
(Date:7/29/2015)... ... 2015 , ... Rainbow Scientific, Inc. (RSI), a North American ... BI’s line of human mesenchymal stem cell (hMSC) differentiation media, MSC go ... complete system for multipotency evaluation of hMSCs and reliable induction of hMSCs into ...
(Date:7/28/2015)... July 29, 2015 A ... acquiring, rapidly developing and commercialising innovative medicines to ... Highly experienced management team; blue chip ...   Mereo BioPharma Group Ltd ("Mereo"), a recently-formed ... ( c. £76.5m), gross, from blue chip institutional investors ...
(Date:7/28/2015)... , July 28, 2015  PDL BioPharma, Inc. ... announced that the Company will release its second quarter ... 2015, on Wednesday, August 5, 2015, after market close. ... that day at 4:30 p.m. Eastern Time to discuss ... call will be available via the webcast link on ...
(Date:7/28/2015)... , ... July 28, 2015 , ... ... than EUR 1.022 billion in 2013; while production volume reached close to 1.84 ... producing country with a share of 75.5% of the region’s total aluminium hydroxide ...
Breaking Biology Technology:Rainbow Scientific, Inc. Announces Availability of Human Mesenchymal Stem Cell Differentiation Media 2Rainbow Scientific, Inc. Announces Availability of Human Mesenchymal Stem Cell Differentiation Media 3Mereo BioPharma Announces Formal Launch of Company; Raises $119m (c.£76.5m) and Acquires Innovative Mid-Stage Clinical Product Portfolio From Leading Pharmaceutical Company 2Mereo BioPharma Announces Formal Launch of Company; Raises $119m (c.£76.5m) and Acquires Innovative Mid-Stage Clinical Product Portfolio From Leading Pharmaceutical Company 3Mereo BioPharma Announces Formal Launch of Company; Raises $119m (c.£76.5m) and Acquires Innovative Mid-Stage Clinical Product Portfolio From Leading Pharmaceutical Company 4Mereo BioPharma Announces Formal Launch of Company; Raises $119m (c.£76.5m) and Acquires Innovative Mid-Stage Clinical Product Portfolio From Leading Pharmaceutical Company 5Mereo BioPharma Announces Formal Launch of Company; Raises $119m (c.£76.5m) and Acquires Innovative Mid-Stage Clinical Product Portfolio From Leading Pharmaceutical Company 6Mereo BioPharma Announces Formal Launch of Company; Raises $119m (c.£76.5m) and Acquires Innovative Mid-Stage Clinical Product Portfolio From Leading Pharmaceutical Company 7Mereo BioPharma Announces Formal Launch of Company; Raises $119m (c.£76.5m) and Acquires Innovative Mid-Stage Clinical Product Portfolio From Leading Pharmaceutical Company 8Mereo BioPharma Announces Formal Launch of Company; Raises $119m (c.£76.5m) and Acquires Innovative Mid-Stage Clinical Product Portfolio From Leading Pharmaceutical Company 9Mereo BioPharma Announces Formal Launch of Company; Raises $119m (c.£76.5m) and Acquires Innovative Mid-Stage Clinical Product Portfolio From Leading Pharmaceutical Company 10Mereo BioPharma Announces Formal Launch of Company; Raises $119m (c.£76.5m) and Acquires Innovative Mid-Stage Clinical Product Portfolio From Leading Pharmaceutical Company 11PDL BioPharma to Announce Second Quarter 2015 Financial Results on August 5, 2015 2EU27 Aluminium Hydroxide Market Analysed and Forecast by BAC Reports in New Research Study Available at MarketPublishers.com 2EU27 Aluminium Hydroxide Market Analysed and Forecast by BAC Reports in New Research Study Available at MarketPublishers.com 3
... Advice Shared Through Dynamic WikiAnswers Q&A ... ... a show of support for National,Breast Cancer Awareness Month, Answers.com,s question ... ), where breast cancer survivors,friends and family have gathered to ask ...
... Win Needed Medical ... Oct. 22 Television medical dramas such as,ER and House ... country to millions of Americans each week. Now, small hospitals,lacking ... - are being given the opportunity to turn the cameras ...
... 22 Genzyme Corp.,(Nasdaq: GENZ ) today ... granted marketing approval for Renvela(TM) (sevelamer carbonate) for,the ... kidney disease on,dialysis. Renvela is a next-generation version ... the United States. "Since its approval in ...
Cached Biology Technology:Answers.com's WikiAnswers Supervisors Rallying for National Breast Cancer Awareness Month 2Answers.com's WikiAnswers Supervisors Rallying for National Breast Cancer Awareness Month 3American M.R.I.-DOL: Small Hospitals To Turn The Camera On Themselves In Unique National Contest 2American M.R.I.-DOL: Small Hospitals To Turn The Camera On Themselves In Unique National Contest 3FDA Approves Genzyme's Renvela(TM) for Dialysis Patients 2FDA Approves Genzyme's Renvela(TM) for Dialysis Patients 3FDA Approves Genzyme's Renvela(TM) for Dialysis Patients 4FDA Approves Genzyme's Renvela(TM) for Dialysis Patients 5
Goat polyclonal to Ephrin B2 ( Abpromise for all tested applications). entrezGeneID: 1948 SwissProtID: P52799...
... Antibody to ARG. Vasopressin The ... peptide. Cells are found in the ... are found throughout the hypothalmus in ... tissue. Immunogen: ...
Mouse monoclonal [RL13] to LAP1 ( Abpromise for all tested applications). SwissProtID: Q96NW7...
Rabbit polyclonal to LCAT ( Abpromise for all tested applications). entrezGeneID: 3931 SwissProtID: P04180...
Biology Products: