HOME >> BIOLOGY >> NEWS
Max Planck researchers make a breakthrough in plant stem cell research

Totipotent stem cells allow plants to build new organs throughout their whole life. But it has been unclear how hormones and genetic factors work together to prevent plants from having growth that is either stunted, or uncontrolled and tumor-like. Scientists from the Max Planck Institute for Developmental Biology have now uncovered a feedback mechanism, involving a growth-enhancing hormone and a regulatory protein, which controls the number of stem cells the plant produces. (Nature, December 22, 2005). The results are of great importance for all of stem cell research.

All above ground parts of a plant - leaves, stem, flowers, and seeds - ultimately are derived from cells of a small tissue at the tip of the shoot. Biologists call this tissue the "apical meristem", and it contains totipotent stem cells that are active throughout the life of the plant. Unlike the stem cells of animals, which can only produce specific kinds of tissue after the animal is past its embryonic stage, plant stem cells remain their totipotency and, therefore plants can continue growing over many years, developing new organs.

But this ability comes at a price. If the number of meristematic stem cells increases too quickly, then there could be uncontrolled growth, similar to cancer. On the other hand, if the stem cell pool shrinks too quickly, the plant could have stunted growth. In order to stay alive and reproduce, the plant needs to find the right balance in the number of its stem cells. Two regulatory mechanisms were found to be important for this process. The first involves growth-promoting hormones like auxin and cytokinin, known already for more than half a century. The second involves genetic factors, which were discovered at the University of Tübingen, Germany about a decade ago. Here it was shown that a gene called WUSCHEL has a key influence on how many cells in the apical meristem actually stay stem cells. However, until now, it was unclear how hormones and regulatory
'"/>

Contact: Dr. Jan Lohmann
jan.lohmann@tuebingen.mpg.de
497-071-601-1405
Max-Planck-Gesellschaft
22-Dec-2005


Page: 1 2 3

Related biology news :

1. 454 Life Sciences and Max Planck publish sequence of one million base pairs
2. Max Planck researchers win part of Descartes Research Prize 2005
3. Global commitment of Max Planck researchers
4. Four Max Planck Partner Groups starting in India
5. First Max Planck Partner Institute in China
6. Innovative tagging technique may help researchers better protect fish stocks
7. Penn researchers discover how key protein stops inflammation
8. ASU researchers partner with UOP to make biofuel for military jets a reality
9. Einstein researchers prototype vaccine could provide improved protection against tuberculosis
10. Penn researchers discover pathway that eliminates genetic defects in red blood cells
11. U-M researchers find family of on switches that cause prostate cancer

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Max Planck researchers make breakthrough plant stem cell research

(Date:10/14/2014)... – October 14, 2014 – Scientists from The Scripps ... the National Institutes of Health (NIH) to lead an ... hemorrhagic fever disease in Africa. The study aims to ... some patients die, while others survive the inflection. ... the basic mechanism of how Lassa fever virus causes ...
(Date:10/14/2014)... international team of researchers, led by the Chinese Academy ... Nature Genetics a brief genomic history of ... the tomato plant. , The C.M. Rick Tomato Genetics ... in this study by providing seed of both cultivated ... which builds on the first tomato genome sequence completed ...
(Date:10/14/2014)... – Over the past decades, we have seen numerous ... the needs of infants for social contact and stimulation ... thrive. , Infancy and childhood are critical ... A generation of research suggests that enriched environments, full ... cognitive function. In contrast, deprivation and stress may compromise ...
Breaking Biology News(10 mins):Scripps Research Institute team receives $6.6 million to investigate deadly Lassa virus 2Institutional rearing may increase risk attention-deficit disorder 2
(Date:10/18/2014)... October 18, 2014 The Asian arthroscopic ... Asia with analysis and forecast of revenue. The arthroscopic ... $712.3 million by 2018, at a CAGR of 6.5% ... of the Asian arthroscopic devices market, to get an ... a glimpse of the segmentation of arthroscopic devices market ...
(Date:10/18/2014)... NY (PRWEB) October 18, 2014 The ... healthy rate in the five years to 2014. The ... federal renewable energy tax credits that encouraged the use ... enacted renewable portfolio standards (RPSs), which require local utilities ... of their total energy portfolio. Increased campaigning for green ...
(Date:10/17/2014)... engineering professors have received a $451,781 Air Force Office ... at the micro- and nano-scale level that will provide ... professor of Mechanical and Aerospace Engineering, said the new ... than taking X-rays of an aircraft,s wing., "We,ll be ... when we look at it on this scale," Huang ...
(Date:10/17/2014)... October 17, 2014 Bioquell, provider ... upon by health facilities around the world to ... being treated. Among the many places the hydrogen ... Health Presbyterian Hospital Dallas and at the National ... vapor-producing robots have been utilized to decontaminate patient ...
Breaking Biology Technology:The Asian arthroscopic devices market is estimated to grow to $712.3 million by 2018 - New Report by MicroMarket Monitor 2The Asian arthroscopic devices market is estimated to grow to $712.3 million by 2018 - New Report by MicroMarket Monitor 3The Asian arthroscopic devices market is estimated to grow to $712.3 million by 2018 - New Report by MicroMarket Monitor 4Biomass 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 3UT Arlington project to detect possible damages in aircraft parts early in process 2Bioquell’s Vapor Producing Robots Selected to Combat Ebola in Hospitals Around the World 2Bioquell’s Vapor Producing Robots Selected to Combat Ebola in Hospitals Around the World 3Bioquell’s Vapor Producing Robots Selected to Combat Ebola in Hospitals Around the World 4Bioquell’s Vapor Producing Robots Selected to Combat Ebola in Hospitals Around the World 5Bioquell’s Vapor Producing Robots Selected to Combat Ebola in Hospitals Around the World 6
Cached News: