Navigation Links
Microbes team up to boost plants' stress tolerance
Date:2/17/2013

UNIVERSITY PARK, PA. -- While most farmers consider viruses and fungi potential threats to their crops, these microbes can help wild plants adapt to extreme conditions, according to a Penn State virologist.

Discovering how microbes collaborate to improve the hardiness of plants is a key to sustainable agriculture that can help meet increasing food demands, in addition to avoiding possible conflicts over scare resources, said Marilyn Roossinck, professor of plant pathology and environmental microbiology, and biology.

"It's a security issue," Roossinck said. "The amount of arable land is shrinking as cities are growing, and climate change is also affecting our ability to grow enough food and food shortages can lead to unrest and wars."

Population growth makes this research important as well, Roossinck added.

"The global population is heading toward 9 billion and incidents of drought like we had recently are all concerns," said Roossinck. "We need to start taking this seriously."

Roossinck, who reports on the findings today (Feb. 17) at the annual meeting of the American Association for the Advancement of Science in Boston, said that she and her colleagues found an example of a collaboration between plants and viruses that confer drought tolerance to many different crop plants.

The researchers tested four different viruses and several different plants, including crops such as rice, tomato, squash and beets, and showed that the viruses increased the plants' ability to tolerate drought. Virus infection also provided cold tolerance in some cases.

A leafy plant, related to a common weed known as lamb's quarter, was also infected with a virus that caused a local infection. The infection was enough to boost the plant's drought tolerance and may mean that the virus does not have to actively replicate in the cells where the resistance to drought occurs, according to Roossinck.

In studies on plants that thrive in the volcanic soils of Costa Rica and in the hot, geothermal ground in Yellowstone National Park, viruses and fungi work together with plants to confer temperature hardiness, said Roossinck. Researchers found that fungi and a type of grass -- tropical panic grass -- found in Yellowstone National Park grow together in temperatures above 125 degrees Fahrenheit. If the plant and fungus are separated, however, both die in the same heat levels.

Because viruses are often present in plant fungi, Roossinck wondered if viruses played a role in the reaction.

"I noticed that all of the samples from the geothermal soils had a virus, so it seemed worth it to take a deeper look," said Roossinck.

The researchers found that there was no heat tolerance without the virus. Once the researchers cured the fungus of the virus, the plant was unable to withstand the heat. When the virus was reintroduced, the plant regained heat tolerance.

"A virus is absolutely required for thermal tolerance," said Roossinck. "If you cure the fungus of the virus, you no longer have the thermal tolerance."

While researchers do not entirely understand the role of viruses in helping plants withstand extreme conditions, Roossinck said that future research may help the agricultural industry naturally develop hardier plants, rather than rely on chemical solutions that threaten the environment.

"The question is, can we restore the natural level of microbes in plants and grow them better and more tolerant of environmental stress like heat and drought, or pathogens?" Roossinck said. "This may lead to more natural methods of creating crops that are more heat, drought and stress tolerant."


'/>"/>

Contact: Matthew Swayne
mls29@psu.edu
814-865-9481
Penn State
Source:Eurekalert

Related biology news :

1. Gut microbes could determine the severity of melamine-induced kidney disease
2. Lack of energy an enemy to antibiotic-resistant microbes
3. FASEB SRC announces conference: Gastrointestinal Tract XV: Epithelia, Microbes, Inflammation & Cancer
4. Microbiologists eavesdrop on the hidden lives of microbes
5. They hunt, they kill, they cheat: Single-celled algae shed light on social lives of microbes
6. Even in same vineyard, different microbes may create variations in wine grapes
7. Not without my microbes
8. Dark Ages scourge enlightens modern struggle between man and microbes
9. Cheering microbes into space
10. My microbes
11. Ancient microbes found living beneath the icy surface of Antarctic lake
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/21/2016)... Columbia , June 21, 2016 ... to the new role of principal product architect ... named the director of customer development. Both will ... chief technical officer. The moves reflect NuData,s strategic ... in response to high customer demand and customer ...
(Date:6/9/2016)... Paris Police Prefecture and ... ensure the safety of people and operations in several locations ... Teleste, an international technology group specialised in broadband ... its video security solution will be utilised by ... across the country. The system roll-out is scheduled for the ...
(Date:6/2/2016)... Perimeter Surveillance & Detection Systems, Biometrics & ... & Other Service  The latest report from ... of the global Border Security market . Visiongain ... billion in 2016. Now: In November 2015 ... and hardware technologies for advanced video surveillance. ...
Breaking Biology News(10 mins):
(Date:6/27/2016)... 2016  Sequenom, Inc. (NASDAQ: SQNM ), ... through the development of innovative products and services, announced ... United States denied its petition to review ... Sequenom,s U.S. Patent No. 6,258,540 (",540 Patent") are not ... the Supreme Court,s Mayo Collaborative Services v. Prometheus Laboratories ...
(Date:6/27/2016)... ... June 27, 2016 , ... Rolf ... join the faculty of the University of North Carolina Kenan-Flagler Business School ... and entrepreneurship at UNC Kenan-Flagler, with a focus on the school’s international efforts, ...
(Date:6/24/2016)... SAN DIEGO , June 24, 2016 /PRNewswire/ ... that more sensitively detects cancers susceptible to PARP ... individual circulating tumor cells (CTCs). The new test ... of HRD-targeted therapeutics in multiple cancer types. ... therapies targeting DNA damage response pathways, including PARP, ...
(Date:6/23/2016)... ... June 23, 2016 , ... ... announce the launch of their brand, UP4™ Probiotics, into Target stores nationwide. The ... is proud to add Target to its list of well-respected retailers. This list ...
Breaking Biology Technology: