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

e 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.


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

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