Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

A New Role for Cytokinin Plant Hormones

12.09.2011
Discovery of a Mutual Regulation Mechanism Controlling Drought and Salt Stress Responses

When plants, including crops, are exposed to environmental stresses such as drought or high salinity, abscisic acid (ABA), a stress-responsive hormone is synthesized to induce a protective response.

At the same time, the content of another plant hormone, cytokinin (CK), which is involved in regulation of plant growth, such as promotion of cell division or inhibition of senescence, is reduced.

This phenomenon suggests that CK might play an essential role in regulation of plant adaptation to environmental stresses. However, how CK regulates plant response to stresses and how stresses regulate CK metabolism; these questions required answers.

The Signaling Pathway Research Unit discovered that mutual regulation mechanism between CK and ABA affects the plant’s adaptation to stressors. The authors found that the CK-deficient Arabidopsis plants with reduced CK levels exhibited a strong stress-tolerant phenotype that was associated with improved cell membrane integrity and ABA hypersensitivity.

Additionally, using Arabidopsis the authors provided evidence that drought and salt stresses reduce the levels of the bioactive CKs by alteration of expression of CK metabolic genes. Taken together, the group suggested that because of the reduction in CK content under drought and salt stresses, the inhibitory effect of the CK regulatory network on the expression of stress-responsive genes is alleviated, leading to enhanced stress tolerance. CK biology, therefore, represents a promising tool for agronomy and can provide multiple biotechnological strategies to maintain agriculture in a sustainable fashion.

These results were published in the June 2011 edition of The Plant Cell.

Contacts
Plant Science Center, RIKEN
Dr. Lam-Son Phan Tran (Unit Leader):
TEL 045-503-9593, FAX 045-503-9591
Dr. Rie Nishiyama (Researcher):
TEL 045-503-9572, FAX 045-503-9591

gro-pr | Research asia research news
Further information:
http://www.riken.jp
http://www.researchsea.com

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Can we see monkeys from space? Emerging technologies to map biodiversity

An international team of scientists has proposed a new multi-disciplinary approach in which an array of new technologies will allow us to map biodiversity and the risks that wildlife is facing at the scale of whole landscapes. The findings are published in Nature Ecology and Evolution. This international research is led by the Kunming Institute of Zoology from China, University of East Anglia, University of Leicester and the Leibniz Institute for Zoo and Wildlife Research.

Using a combination of satellite and ground data, the team proposes that it is now possible to map biodiversity with an accuracy that has not been previously...

Im Focus: Climate satellite: Tracking methane with robust laser technology

Heatwaves in the Arctic, longer periods of vegetation in Europe, severe floods in West Africa – starting in 2021, scientists want to explore the emissions of the greenhouse gas methane with the German-French satellite MERLIN. This is made possible by a new robust laser system of the Fraunhofer Institute for Laser Technology ILT in Aachen, which achieves unprecedented measurement accuracy.

Methane is primarily the result of the decomposition of organic matter. The gas has a 25 times greater warming potential than carbon dioxide, but is not as...

Im Focus: How protons move through a fuel cell

Hydrogen is regarded as the energy source of the future: It is produced with solar power and can be used to generate heat and electricity in fuel cells. Empa researchers have now succeeded in decoding the movement of hydrogen ions in crystals – a key step towards more efficient energy conversion in the hydrogen industry of tomorrow.

As charge carriers, electrons and ions play the leading role in electrochemical energy storage devices and converters such as batteries and fuel cells. Proton...

Im Focus: A unique data centre for cosmological simulations

Scientists from the Excellence Cluster Universe at the Ludwig-Maximilians-Universität Munich have establised "Cosmowebportal", a unique data centre for cosmological simulations located at the Leibniz Supercomputing Centre (LRZ) of the Bavarian Academy of Sciences. The complete results of a series of large hydrodynamical cosmological simulations are available, with data volumes typically exceeding several hundred terabytes. Scientists worldwide can interactively explore these complex simulations via a web interface and directly access the results.

With current telescopes, scientists can observe our Universe’s galaxies and galaxy clusters and their distribution along an invisible cosmic web. From the...

Im Focus: Scientists develop molecular thermometer for contactless measurement using infrared light

Temperature measurements possible even on the smallest scale / Molecular ruby for use in material sciences, biology, and medicine

Chemists at Johannes Gutenberg University Mainz (JGU) in cooperation with researchers of the German Federal Institute for Materials Research and Testing (BAM)...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Plants are networkers

19.06.2017 | Event News

Digital Survival Training for Executives

13.06.2017 | Event News

Global Learning Council Summit 2017

13.06.2017 | Event News

 
Latest News

Mice provide insight into genetics of autism spectrum disorders

28.06.2017 | Health and Medicine

New photoacoustic technique detects gases at parts-per-quadrillion level

28.06.2017 | Physics and Astronomy

Funding of Collaborative Research Center developing nanomaterials for cancer immunotherapy extended

28.06.2017 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>