Navigation Links
Why plants usually live longer then animals
Date:10/24/2013

Ghent, 24 October Stem cells are crucial for the continuous generation of new cells. Although the importance of stem cells in fuelling plant growth and development still many questions on their tight molecular control remain unanswered. Plant researchers at VIB and Ghent University discovered a new step in the complex regulation of stem cells. Today, their results are published online in this week's issue of Science Express.

Lieven De Veylder: "Our data suggest that certain organizing stem cells in plant roots are less sensitive for DNA-damage. Those cells hold an original and intact DNA copy which can be used to replace damaged cells if necessary. Animals rely on a similar mechanism but most likely plants have employed this in a more optimized manner. This could explain why many plants can live for more than hundreds of years, while this is quite exceptional for animals."

Quiescent organisers of plant growth

Plant growth and development depend on the continuous generation of new cells. A small group of specialized cells present in the growth axes of a plant is driving this. These so-called stem cells divide at a high frequency and have the unique characteristic that the original mother cell keeps the stem cell activity while the daughter cell acquires a certain specialization. Besides these stem cells, plant roots also harbor organizing cells. These organizing cells divide with a three- to ten-fold lower frequency, therefore often referred to as quiescent center cells. The organizing cells control the action of the surrounding stem cells and can replace them if necessary.

A new molecular network

For almost 20 years, scientists all over the world have been studying the action of the stem cells and that of their controlling organizing cells. Until now it was not known how quiescent and actively dividing cells could co-exist so closely and which mechanisms are at the basis of the quiescent character. Plant researchers at VIB and Ghent University have now identified a new molecular network that increases our understanding of stem cell regulation and activity. Central in this process is the discovery of a new protein, the ERF115 transcription factor. The scientists demonstrated that the organizing cells barely divide because of the inhibition of ERF115 activity. When the organizing cells need to divide to replace damaged surrounding stem cells, ERF115 gets activated. ERF115 then stimulates the production of the plant hormone phytosulfokine which in turn activates the division of the organizing cells. Thus, the ERF115-phytosulfokine network acts as a back-up system during stress conditions which are detrimental for the activity of stem cells.


'/>"/>

Contact: Wim Grunewald
info@vib.be
32-924-46611
VIB (the Flanders Institute for Biotechnology)
Source:Eurekalert

Related biology news :

1. Not just for the birds: Man-made noise has ripple effects on plants, too
2. Human noise has ripple effects on plants
3. Plants mimic scent of pollinating beetles
4. Stomata development in plants unraveled -- a valuable discovery for environmental research
5. Scientists study the catalytic reactions used by plants to split oxygen from water
6. Which plants will survive droughts, climate change?
7. A bit touchy: Plants insect defenses activated by touch
8. UCSB study shows forest insects and diseases arrive in US via imported plants
9. Nutrient and toxin all at once: How plants absorb the perfect quantity of minerals
10. Neural stem cell transplants for spinal cord injury maximized by combined, complimentary therapies
11. Autologous bone marrow-derived mononuclear cell transplants can reduce diabetic amputations
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:12/19/2016)... BARCELONA , España y TORONTO , 19 ... fusión con Northern Biologics Inc. que permitirá el desarrollo acelerado de ... ensayos clínicos en varios tipos de tumor en 2017, con múltiples ... ... de su clase con objetivo en el factor inhibidor de leucemia ...
(Date:12/15/2016)... and BADEN-BADEN, Germany , December 15, 2016 ... financial services provider, today announced an agreement with NuData Security, ... to join forces. The partnership will enable clients to focus ... compliance with local data protection regulation. ... In order to provide a ...
(Date:12/15/2016)... , Dec. 15, 2016  There is much more ... or starting the engine. Continental will demonstrate the intelligence ... Las Vegas . Through the combination of the ... Entry) and biometric elements, the international technology company is ... personalization and authentication. "The integration of biometric ...
Breaking Biology News(10 mins):
(Date:1/20/2017)... -- Ginkgo Bioworks, the organism company, announced today ... synthesis and assembly of DNA. The acquisition will ... DNA into Ginkgo,s automated organism engineering foundries, enabling ... new organism designs for application across a wide ... to significantly increase the world,s capacity to cost-effectively ...
(Date:1/19/2017)... , Jan 19, 2017 Research and Markets ... Profiling Technology, Biomolecules, Cancer Type, Application - Global Opportunity Analysis and ... ... that the global market is projected to reach $15,737 million by ... from 2016 to 2022. Omic technologies segment accounted ...
(Date:1/19/2017)... , Jan. 19, 2017 /PRNewswire -- WuXi AppTec, ... open-access capability and technology platform, today announced that ... biology focused preclinical drug discovery contract research organization ... become a wholly-owned subsidiary of WuXi, and will ... and providing greater services. The acquisition will further ...
(Date:1/19/2017)... ... January 19, 2017 , ... November Research Group, ... biopharmaceutical and medical device manufacturers and regulators, is proud to announce the worldwide ... email client designed to provide product vigilance departments with the flexibility and ease ...
Breaking Biology Technology: