Navigation Links
Formula discovered for longer plant life
Date:9/23/2008

This release is available in German.

Plants that grow more slowly stay fresh longer. In their study now published in PLoS Biology, scientists at the Max Planck Institute for Developmental Biology in Tbingen have shown that certain small sections of genes, so-called microRNAs, coordinate growth and aging processes in plants. These microRNAs inhibit certain regulators, known as TCP transcription factors. These transcription factors in turn influence the production of jasmonic acid, a plant hormone. The higher the number of microRNAs present, the lower the number of transcription factors that are active, and the smaller the amount of jasmonic acid, which is produced by the plant. The plant therefore ages more slowly, as this hormone is important for the plant's aging processes. The researchers have succeeded for the first time in describing the antagonistic regulation of growth and aging in plants. Since the quantity of microRNAs in the plants can be controlled by genetic methods, it may be possible in future to cultivate plants that live longer and grow faster. (PLoS Biology, September 23, 2008)

MicroRNAs are short, single-strand sections of genes that regulate other genes. They do this by binding to complementary sections of the genetic material, thus preventing them from being read and implemented in genetic products. In plants, microRNAs mainly inhibit other regulators, so-called transcription factors. These factors can switch genes on or off by binding to DNA sections, thus activating or blocking them so that either too many or too few proteins are formed. Since proteins control metabolic processes, an imbalance leads to more or less clearly visible changes to the plant.

The scientists in Prof. Detlef Weigel's department at the Max Planck Institute for Developmental Biology have investigated the effects that the transcription factors of the TCP family have on the growth and aging of the thale cress model plant (Arabidopsis thaliana). These transcription factors are regulated by the microRNA miR319.

It was already known that miR319-regulated transcription factors affect the growth of leaves. Using a combination of biochemical and genetic analyses, the researchers have now discovered that the transcription factors also regulate those genes that are essential for the formation of the plant hormone jasmonic acid. The higher the amount of microRNA miR319 present in the plant, the lower the number of transcription factors that are produced. This results in smaller amounts of jasmonic acid which can be synthesized. Plants containing little jasmonic acid age more slowly: The leaves become yellow and the plant dies. This process can be stopped by treating the plant with the hormone.

"Our studies show that the transcription factors, which are regulated by the microRNA miR319, exert a negative influence on the growth of plants, and also lead to premature aging. The mechanism discovered here is a further milestone in the attempt to explain the relationships of genetic regulation in plants. Only when we have a better understanding of these processes will we be able to produce plants that have particularly desired properties," says Detlef Weigel, who heads the project.


'/>"/>

Contact: Dr. Detlef Weigel
Detlef.Weigel@tuebingen.mpg.de
49-7071-601-1410
Max-Planck-Gesellschaft
Source:Eurekalert  

Related biology news :

1. University of Pennsylvania researchers develop formula to gauge risk of disease clusters
2. New formula for combating the greenhouse gas nitrous oxide
3. Louisiana Tech researchers feature drug reformulation in prestigious journal
4. Researchers study facial structures, brain abnormalities to reveal formula for detection of autism
5. New, more direct pathways from outside the cell-to-cell nuclei discovered
6. New continent and species discovered in Atlantic study
7. Ancient organisms discovered in Canadian gold mine
8. New golden frog discovered in remote region of Colombia
9. Antioxidant to retard wrinkles discovered by Hebrew University researcher
10. One species entire genome discovered inside anothers
11. New molecules discovered that block cancer cells from modifying cell DNA
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Formula discovered for longer plant life
(Date:4/3/2017)... , April 3, 2017  Data ... precision engineering platform, detected a statistically significant ... product prior to treatment and objective response ... the potential to predict whether cancer patients ... to treatment, as well as to improve ...
(Date:3/29/2017)...  higi, the health IT company that operates the ... , today announced a Series B investment from ... The new investment and acquisition accelerates higi,s strategy to ... population health activities through the collection and workflow integration ... collects and secures data today on behalf of over ...
(Date:3/24/2017)... 2017 Research and Markets has announced the ... & Trends - Industry Forecast to 2025" report to their ... The Global ... CAGR of around 15.1% over the next decade to reach approximately ... the market estimates and forecasts for all the given segments on ...
Breaking Biology News(10 mins):
(Date:4/19/2017)... , April 19, 2017 A new report published by ... Forecast, 2014-2022 ," the global market was valued at $6,769 million in 2015, ... 9.6% from 2016 to 2022. ... Allied Market Research Logo ...      (Logo: http://photos.prnewswire.com/prnh/20140911/647229) The ...
(Date:4/19/2017)... SOUTH SAN FRANCISCO, Calif. , April 19, ... VCYT ) today announced that it ... after close of market on Wednesday, May 3, 2017. ... call and webcast at 4:30 p.m. Eastern Time to discuss ... The live webcast and subsequent replay may ...
(Date:4/18/2017)... ... April 18, 2017 , ... ... awarded Channel Partners 2017 Next-Gen Solution Provider. , Channel Partners program recognizes IT ... with their vision, innovation, and advocacy of the channel during transition and convergence. ...
(Date:4/18/2017)... , ... April 18, 2017 , ... ... that Dr. Mark Boguski has been appointed to the role of Chief Medical ... medicine solutions. , “Dr. Boguski is widely considered a visionary leader in ...
Breaking Biology Technology: