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International Symposium on Cereal Leaf Blights (ISCLB) 2019: Book of Abstracts
2019-04-24, Feechan, Angela, Benbow, Harriet, Tiley, Anna, Gibriel, Hesham, Casey, Edward, Doohan, Fiona M., Feechan, Angela
International Symposium on Cereal Leaf Blights is one of the most important conferences for the Cereal Blight Community including academics, researchers, agency partners and commercial breeders. The Symposium aims to bring together the whole research community - not just in academia but also in research centres and institutes and across government and agency organisations - with an interest in a wide variety of issues around cereal leaf blights. Over the course of three days, we participate in extensive debate and discussion across our seven Symposium topics: Evolution and Population Biology, Cultural management, fungicide resistance and epidemiology, Pathogen Functional Genetics and Genomics, Host-Pathogen Interactions, Host genetics and Resistance Breeding, Secondary Metabolism and Physiology and Special Topics.
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Isolate specific responses of the non-host grass Brachypodium distachyon to the fungal pathogen Zymoseptoria tritici, compared to wheat
2021-02, Reilly, Aisling, Karki, Sujit Jung, Twamley, Anthony, Tiley, Anna, Kildea, Steven, Feechan, Angela
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.