Isolate specific responses of the non-host grass Brachypodium distachyon to the fungal pathogen Zymoseptoria tritici, compared to wheat

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Title: Isolate specific responses of the non-host grass Brachypodium distachyon to the fungal pathogen Zymoseptoria tritici, compared to wheat
Authors: Reilly, AilsingKarki, Sujit JungTwamley, AnthonyTiley, AnnaKildea, StevenFeechan, Angela
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Date: Feb-2021
Online since: 2021-08-20T16:27:50Z
Abstract: Septoria tritici blotch (STB) is an important foliar disease of wheat that is caused by the fungal pathogen Zymoseptoria tritici. The grass Brachypodium distachyon has been used previously as a model system for cereal-pathogen interactions. In this study, we examined the non-host resistance (NHR) response of B. distachyon to two different Z. tritici isolates in comparison to wheat. These isolates vary in aggressiveness on wheat cv. Remus displaying significant differences in disease and pycnidia coverage. Using microscopy, we found that similar isolate specific responses were observed for H2O2 accumulation and cell death in both wheat and B. distachyon. Despite this, induction of isolate specific patterns of defence gene expression by Z. tritici did differ between B. distachyon and wheat. Our results suggest that phenylalanine ammonia lyase (PAL) expression may be important for NHR in B. distachyon while pathogenesis-related (PR) genes and expression of genes regulating reactive oxygen species (ROS) may be important to limit disease in wheat. Future studies of the B. distachyon-Z. tritici interaction may allow identification of conserved plant immunity targets which are responsible for the isolate specific responses observed in both plant species.
Funding Details: European Commission Horizon 2020
Science Foundation Ireland
Type of material: Journal Article
Publisher: American Phytopathological Society
Journal: Phytopathology
Volume: 111
Issue: 2
Start page: 356
End page: 368
Copyright (published version): 2021 The American Phytopathological Society
Keywords: Fungal pathogensPathogen recognitionPlantsZymoseptoria triticiBrachypodium distachyonWheat
DOI: 10.1094/phyto-02-20-0041-r
Language: en
Status of Item: Peer reviewed
ISSN: 0031-949X
This item is made available under a Creative Commons License:
Appears in Collections:Earth Institute Research Collection
Agriculture and Food Science Research Collection

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