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:


(Date:4/11/2017)... 11, 2017 No two people are ... the New York University Tandon School of Engineering ... found that partial similarities between prints are common ... mobile phones and other electronic devices can be ... vulnerability lies in the fact that fingerprint-based authentication ...
(Date:4/6/2017)... LONDON , April 6, 2017 ... Control, RFID, ANPR, Document Readers, by End-Use (Transportation & ... Energy Facility, Oil, Gas & Fossil Generation Facility, Nuclear ... Healthcare, Educational, Other) Are you looking for ... Authentication sector? ...
(Date:4/5/2017)... 2017 Today HYPR Corp. , leading ... component of the HYPR platform is officially FIDO® ... security architecture that empowers biometric authentication across Fortune 500 ... secured over 15 million users across the financial services ... home product suites and physical access represent a growing ...
Breaking Biology News(10 mins):
(Date:9/17/2017)... ... September 17, 2017 , ... GeneOne Life Science, Inc. announces ... Drug Safety (KMFDS) for an Investigational New Drug application for a Phase I/IIa ... (MERS-CoV). The study in Korea represents the second clinical trial for GLS-5300. ...
(Date:9/14/2017)... ... September 14, 2017 , ... ... its extensive experience with Health Economics and Outcomes Research (HEOR) and ‘big data’ ... testing. In 2014, US healthcare spending exceeded $3.0 trillion with nearly 1/3 spent ...
(Date:9/13/2017)... ... September 13, 2017 , ... AMRI, a ... to improve patient outcomes and quality of life for more than 25 years, ... a US expert to the International Standards Organization/Technical Committee 194: Biological and ...
(Date:9/12/2017)... ... September 12, 2017 , ... It wasn’t just the San ... been hot, hot, hot, as Lajollacooks4u has had a record-breaking number of guests for ... from far and wide to celebrate company outings, family get-togethers, anniversaries and milestone birthdays. ...
Breaking Biology Technology:
Cached News: