Navigation Links
New hope for powdery mildew resistant barley
Date:7/25/2014

New research at the University of Adelaide has opened the way for the development of new lines of barley with resistance to powdery mildew.

In Australia, annual barley production is second only to wheat with 7-8 million tonnes a year. Powdery mildew is one of the most important diseases of barley.

Senior Research Scientist Dr Alan Little and team have discovered the composition of special growths on the cell walls of barley plants that block the penetration of the fungus into the leaf.

The research, by the ARC Centre of Excellence in Plant Cell Walls in the University's School of Agriculture, Food and Wine in collaboration with the Leibniz Institute of Plant Genetics and Crop Plant Research in Germany, will be presented at the upcoming 5th International Conference on Plant Cell Wall Biology and published in the journal New Phytologist .

"Powdery mildew is a significant problem wherever barley is grown around the world," says Dr Little. "Growers with infected crops can expect up to 25% reductions in yield and the barley may also be downgraded from high quality malting barley to that of feed quality, with an associated loss in market value.

"In recent times we've seen resistance in powdery mildew to the class of fungicide most commonly used to control the disease in Australia. Developing barley with improved resistance to the disease is therefore even more important."

The discovery means researchers have new targets for breeding powdery mildew resistant barley lines.

"Powdery mildew feeds on the living plant," says Dr Little. "The fungus spore lands on the leaf and sends out a tube-like structure which punches its way through cell walls, penetrating the cells and taking the nutrients from the plant. The plant tries to stop this penetration by building a plug of cell wall material a papillae around the infection site. Effective papillae can block the penetration by the fungus.

"It has long been thought that callose is the main polysaccharide component of papilla. But using new techniques, we've been able to show that in the papillae that block fungal penetration, two other polysaccharides are present in significant concentrations and play a key role.

"It appears that callose acts like an initial plug in the wall but arabinoxylan and cellulose fill the gaps in the wall and make it much stronger."

In his PhD project, Jamil Chowdhury showed that effective papillae contained up to four times the concentration of callose, arabinoxylan and cellulose as cell wall plugs which didn't block penetration.

"We can now use this knowledge find ways of increasing these polysaccharides in barley plants to produce more resistant lines available for growers," says Dr Little.


'/>"/>

Contact: Alan Little
alan.little@adelaide.edu.au
61-883-137-260
University of Adelaide
Source:Eurekalert  

Related biology news :

1. More carbohydrates make trees more resistant to drought
2. Research may yield new ways to treat antibiotic-resistant TB
3. Protein could put antibiotic-resistant bugs in handcuffs
4. Promising discovery in the fight against antibiotic-resistant bacteria
5. Pulsed electrical fields destroy antibiotic-resistant bacteria infecting burn injuries
6. RNA shows potential as boiling-resistant anionic polymer material for nanoarchitectures
7. Tamiflu-resistant influenza: Parsing the genome for the culprits
8. Among US children, more infections caused by drug-resistant bacteria
9. UT Arlington undergrad honored for research on antibiotic resistant infection
10. Laboratory detective work points to potential therapy for rare, drug-resistant cancer
11. Genetic find might lead to cattle that are more resistant to TB
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
New hope for powdery mildew resistant barley
(Date:11/16/2016)... , Nov. 16, 2016 Sensory Inc ... and security for consumer electronics, and VeriTran ... and retail industry, today announced a global partnership ... way to authenticate users of mobile banking and ... TrulySecure™ software which requires no specialized biometric ...
(Date:11/14/2016)... SANTA CLARA, Calif. , Nov. 14, ... of the biometric identification market, Frost & ... Global Frost & Sullivan Award for Visionary ... leading player in the biometric identification market ... a multi-modal verification solution for instant, seamless, ...
(Date:6/22/2016)... , June 22, 2016 On Monday, ... call to industry to share solutions for the Biometric ... U.S. Customs and Border Protection (CBP), explains that CBP ... are departing the United States , ... and to defeat imposters. Logo - ...
Breaking Biology News(10 mins):
(Date:11/30/2016)... Nov. 30, 2016 /PRNewswire/ -  Equicare Health Inc ., ... been recognized as one of the top 100 companies ... international listing that distinguishes the top digital health companies ... great step forward this year continually upgrading our product ... customer base and team," says Len Grenier , ...
(Date:11/30/2016)... 2016 Part of 5m$ Investment in ... ... Aptuit, LLC today announced that it had successfully completed the ... compounds have increased the Screening Collection to over 400,000. The ... capabilities of the company. This expansion, complemented by new robotics ...
(Date:11/30/2016)... ... November 30, 2016 , ... T3D Therapeutics, Inc., a ... administered treatment for Alzheimer’s disease (AD), today announced that CEO, John Didsbury, will ... of T3D-959 in mild to moderate Alzheimer’s patients at CTAD 2016. Preliminary results ...
(Date:11/30/2016)... ... November 30, 2016 , ... Microbial genomics leader uBiome will ... Huffington, as part of the Thrive Global pop-up store. This stunning 5,000 square ... explore the microorganisms in their gut, collectively known as the microbiome. , The ...
Breaking Biology Technology: