Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/1622
Title: Microbial endoxylanases: Effective weapons to breach the plant cell-wall barrier or, rather, triggers of plant defense systems?
Authors: Beliën, T.
Van Campenhout, S.
ROBBEN, Johan 
Volckaert, G.
Issue Date: 2006
Publisher: American Phytopathological Society
Source: MOLECULAR PLANT-MICROBE INTERACTIONS, 9(10). p. 1072-1081
Abstract: Endo-beta-1,4-xylanases (EC 3.2.1.8) are key enzymes in the degradation of xylan, the predominant hemicellulose in the cell walls of plants and the second most abundant polysaccharide on earth. A number of endoxylanases are produced by microbial phytopathogens responsible for severe crop losses. These enzymes are considered to play an important role in phytopathogenesis, as they provide essential means to the attacking organism to break through the plant cell wall. Plants have evolved numerous defense mechanisms to protect themselves against invading pathogens, amongst which are proteinaceous inhibitors of cell wall-degrading enzymes. These defense mechanisms are triggered when a pathogen-derived elicitor is recognized by the plant. In this review, the diverse aspects of endoxylanases in promoting virulence and in eliciting plant defense systems are highlighted. Furthermore, the role of the relatively recently discovered cereal endoxylanase inhibitor families TAXI (Triticum aestivum xylanase inhibitor) and XIP (xylanase inhibitor protein) in plant defense is discussed.
Keywords: ethylene-inducing xylanase (EIX); glycoside hydrolase (GH); hypersensitive response (HR); plant pathogens; signaling cascade
Document URI: http://hdl.handle.net/1942/1622
ISSN: 0894-0282
e-ISSN: 1943-7706
DOI: 10.1094/MPMI-19-1072
ISI #: 000240692300003
Category: A1
Type: Journal Contribution
Validations: ecoom 2007
Appears in Collections:Research publications

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