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Type: Journal article
Title: Differential accumulation of callose, arabinoxylan and cellulose in nonpenetrated versus penetrated papillae on leaves of barley infected with Blumeria graminis f. sp. hordei
Author: Chowdhury, M.
Henderson, M.
Schweizer, P.
Burton, R.
Fincher, G.
Little, A.
Citation: New Phytologist, 2014; 204(3):650-660
Publisher: Wiley
Issue Date: 2014
ISSN: 0028-646X
Statement of
Jamil Chowdhury, Marilyn Henderson, Patrick Schweizer, Rachel A. Burton, Geoffrey B. Fincher and Alan Little
Abstract: • In plants, cell walls are one of the first lines of defence for protecting cells from successful invasion by fungal pathogens and are a major factor in basal host resistance. For the plant cell to block penetration attempts, it must adapt its cell wall to withstand the physical and chemical forces applied by the fungus. • Papillae that have been effective in preventing penetration by pathogens are traditionally believed to contain callose as the main polysaccharide component. Here, we have re-examined the composition of papillae of barley (Hordeum vulgare) attacked by the powdery mildew fungus Blumeria graminis f. sp. hordei (Bgh) using a range of antibodies and carbohydrate-binding modules that are targeted to cell wall polysaccharides. • The data show that barley papillae induced during infection with Bgh contain, in addition to callose, significant concentrations of cellulose and arabinoxylan. Higher concentrations of callose, arabinoxylan and cellulose are found in effective papillae, compared with ineffective papillae. The papillae have a layered structure, with the inner core consisting of callose and arabinoxylan and the outer layer containing arabinoxylan and cellulose. • The association of arabinoxylan and cellulose with penetration resistance suggests new targets for the improvement of papilla composition and enhanced disease resistance.
Keywords: Blumeria graminis
Description: First published: 20 August 2014
Rights: © 2014 University of Adelaide. New Phytologist © 2014 New Phytologist Trust
DOI: 10.1111/nph.12974
Grant ID: ARC
Appears in Collections:Agriculture, Food and Wine publications
Aurora harvest 3

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