UCSD researchers decipher molecular "code" capable of controlling plant water loss during droughts

e smarter than we thought they were," says Gethyn J. Allen, a UCSD biologist and the first author of the research paper. "They can tune in to appropriate stimuli and tune out inappropriate stimuli. The guard cells can read the oscillations and modify their behavior. If the calcium oscillations are either too fast or too slow, the guard cells can sense that and the stomata will open up again."

Plant scientists have for more than a decade suspected that calcium oscillations might play a role in the opening and closing of stomata. The UCSD scientists were able to prove this was the case and crack the calcium code by conducting a series of experiments on a normal and a mutant form of the common laboratory plant, Arabidopsis.

The researchers showed that elevated calcium concentrations in the guard cells of normal plants produced short-term closures of the stomata for less than an hour. But long-term closuresmore than three hourswere evident only when the oscillation of calcium reached a specific frequency. Studying a mutant provided by Erwin Grill at the Technical University of Munich, that is insensitive to a hormone, ABA, secreted by plants under drought-stress conditions, the scientists received further confirmation of the calcium-oscillation frequency required for long-term closures of stomata.

One effect of the mutants insensitivity to the drought-stress hormone is that it produces rapid calcium oscillations, far too rapid to stimulate the guard cells to close. But by experimentally slowing down the calcium oscillations in the mutant to the same frequency at which normal Arabidopsis close their stomata for long periods, Allen, Schroeder and their colleagues were able to demonstrate that the mutants stomata could also be closed for long periods.

"Scientists have speculated for years that there may be a code imbedded in the calcium signals and what weve done, essentially, is to crack this calcium code," says Schroeder, whose colleagues in

Contact: Kim A. McDonald
University of California - San Diego

Page: 1 2 3

Related biology news :

1. Belgian researchers explore revolutionary approach to angiogenesis
2. Award winning researchers reveal potential new role for Glivec
3. $7.5 Million grant to Yale researchers for role of viruses in cancer
4. New anti-inflammatory strategy for cancer therapy identified by UCSD researchers
5. Joslin researchers clarify mechanisms for beta-cell formation
6. Virginia Tech researchers to release findings on Smith River Project
7. Molecular motor myosin VI moves hand over hand, researchers say
8. ASU researchers demonstrate new technique that improves the power of atomic force micrscopy
9. Emory researchers map structure of anti-cancer molecule
10. Leukemia stem cells identified by Stanford researchers
11. EURYI Award given for the first time to 25 young European researchers

Post Your Comments:

(Date:10/5/2018)... ... October 04, 2018 , ... ... University of Illinois Extension and Monroe County Economic Development Corporation (EDC), has ... Institute of Food and Agriculture (NIFA) Non-Land Grant College of Agriculture (NLGCA) ...
(Date:10/3/2018)... , ... October 03, 2018 , ... ... York City, announces the appointment of healthcare visionary, Jimmy Lee, as Strategic Advisor ... over 30 years of healthcare industry experience. As a Senior Executive at Anthem, ...
(Date:10/2/2018)... ... October 02, 2018 , ... Through this webinar, sponsored by ... They will also learn the role of calcium kinetics in cardiac safety testing. The ... officer at PPSC Biography; and Tsang Wai Lam, an assay development scientist at PPSC. ...
Breaking Biology News(10 mins):
(Date:9/27/2018)... , ... September 26, 2018 , ... ... are way ahead of their primary care physicians, according to a new Zeldis ... study, patients and doctors were asked about consumer adoption of fitness and health ...
(Date:9/24/2018)... ... September 24, 2018 , ... ReGrow Helmet , ... highest quality and most affordable option for hair regrowth in the comfort of one’s ... on October 2, 2018. , The sophisticated design and advanced technology of the ...
(Date:9/15/2018)... ... 14, 2018 , ... Nationally recognized public accounting and consulting firm Cherry ... of the Firm’s Nashville practice, on her appointment to Launch Tennessee’s Board ... named Managing Partner of the Firm’s Nashville practice in December 2017 . In this ...
(Date:9/12/2018)... ... September 12, 2018 , ... NDA ... professional and former Senior Director of Regulatory Affairs and Quality Systems at WellDoc, ... Director of Regulatory Affairs and Quality Systems at WellDoc, Inc., she conducted quality ...
Breaking Biology Technology:
Cached News: