Barley elicits a similar early basal defence response during host and non-host interactions with Polymyxa root parasites

A - Papers appearing in refereed journals

Mcgrann, G. R. D., Townsend, B. J., Antoniw, J. F., Asher, M. J. C. and Mutasa-Göttgens, E. S. 2009. Barley elicits a similar early basal defence response during host and non-host interactions with Polymyxa root parasites. European Journal of Plant Pathology. 123 (1), pp. 5-15. https://doi.org/10.1007/s10658-008-9332-z

AuthorsMcgrann, G. R. D., Townsend, B. J., Antoniw, J. F., Asher, M. J. C. and Mutasa-Göttgens, E. S.
Abstract

Plant viruses transmitted by the obligate root-infecting plasmodiophorid parasites Polymyxa graminis and Polymyxa betae cause devastating yield losses to cereal and sugar beet crops worldwide. Barley is a non-host for P. betae but is a host for P. graminis. Using the Barley1 GeneChip® microarray we have investigated the transcriptional re-programming of barley roots during the earliest non-host and host interactions with zoospores of these protist species. At high confidence levels we detected 20 and 13 genes with increased transcriptional activity in response to P. betae and P. graminis, respectively, compared to unchallenged barley roots. Functional classification of the induced genes showed that a majority of the genes from both responses were associated with a classic defence response. Validation by quantitative RT-PCR analysis indicated that all of the genes examined were induced to comparable levels in both non-host and host responses. Our results also demonstrated that the barley defence-associated genes, RAR1, ROR1 or ROR2 were not essential for limiting the establishment of P. betae infection in barley. These data suggest that in barley roots the Polymyxa species induce a similar basal defence response whether the interaction is with a non-host or host. Thus, the early response to protist plant parasites appears to be part of the general ‘frontline’ defence against invading microbes. 

Year of Publication2009
JournalEuropean Journal of Plant Pathology
Journal citation123 (1), pp. 5-15
Digital Object Identifier (DOI)https://doi.org/10.1007/s10658-008-9332-z
Open accessPublished as non-open access
Funder project or codeCentre for Sustainable Pest and Disease Management (PDM)
Project: 4628
Publication dates
Online01 Jun 2008
PublisherSpringer Nature

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