Targeting the pattern‐triggered immunity pathway to enhance resistance to Fusarium graminearum
| Autor: | Harold N. Trick, Syeda T. Alam, Yanhong Dong, Jyoti Shah, Ragiba Makandar, Hyeonju Lee, Sujon Sarowar |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
0301 basic medicine Fusarium Arabidopsis thaliana Arabidopsis Soil Science Plant Science Plant disease resistance 01 natural sciences microbe‐associated molecular pattern 03 medical and health sciences Pathosystem flg22 peptide Gene Expression Regulation Plant wheat Blight Plant Immunity Molecular Biology MAMP Triticum Disease Resistance Plant Diseases Genetics biology Arabidopsis Proteins fungi Pathogen-Associated Molecular Pattern Molecules food and beverages Original Articles WRKY29 biology.organism_classification Plants Genetically Modified 030104 developmental biology Fusarium head blight PTI Ectopic expression Original Article Agronomy and Crop Science 010606 plant biology & botany Flagellin |
| Zdroj: | Molecular Plant Pathology |
| ISSN: | 1364-3703 1464-6722 |
| Popis: | Summary Fusarium head blight (FHB) is a disease of the floral tissues of wheat and barley for which highly resistant varieties are not available. Thus, there is a need to identify genes/mechanisms that can be targeted for the control of this devastating disease. Fusarium graminearum is the primary causal agent of FHB in North America. In addition, it also causes Fusarium seedling blight. Fusarium graminearum can also cause disease in the model plant Arabidopsis thaliana. The Arabidopsis–F. graminearum pathosystem has facilitated the identification of targets for the control of disease caused by this fungus. Here, we show that resistance against F. graminearum can be enhanced by flg22, a bacterial microbe‐associated molecular pattern (MAMP). flg22‐induced resistance in Arabidopsis requires its cognate pattern recognition receptor (PRR) FLS2, and is accompanied by the up‐regulation of WRKY29. The expression of WRKY29, which is associated with pattern‐triggered immunity (PTI), is also induced in response to F. graminearum infection. Furthermore, WRKY29 is required for basal resistance as well as flg22‐induced resistance to F. graminearum. Moreover, constitutive expression of WRKY29 in Arabidopsis enhances disease resistance. The PTI pathway is also activated in response to F. graminearum infection of wheat. Furthermore, flg22 application and ectopic expression of WRKY29 enhance FHB resistance in wheat. Thus, we conclude that the PTI pathway provides a target for the control of FHB in wheat. We further show that the ectopic expression of WRKY29 in wheat results in shorter stature and early heading time, traits that are important to wheat breeding. |
| Databáze: | OpenAIRE |
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