TaWAK2A-800, a Wall-Associated Kinase, Participates Positively in Resistance to Fusarium Head Blight and Sharp Eyespot in Wheat
Fusarium head blight (FHB) and sharp eyespot are important diseases of the cereal plants, including bread wheat (<i>Triticum aestivum</i>) and barley. Both diseases are predominately caused by the pathogenic fungi, <i>Fusarium graminearum</i> and <i>Rhizoctonia cerealis...
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| Autores principales: | , , , , , |
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| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
MDPI AG
2021
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| Materias: | |
| Acceso en línea: | https://doaj.org/article/2d42f2e9b07b44c3ab9050878670dade |
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| Sumario: | Fusarium head blight (FHB) and sharp eyespot are important diseases of the cereal plants, including bread wheat (<i>Triticum aestivum</i>) and barley. Both diseases are predominately caused by the pathogenic fungi, <i>Fusarium graminearum</i> and <i>Rhizoctonia cerealis</i>. The roles of the wheat-wall-associated kinases (WAKs) in defense against both <i>F. graminearum</i> and <i>R. cerealis</i> have remained largely unknown. This research reports the identification of <i>TaWAK2A-800</i>, a wheat <i>WAK</i>-coding gene located on chromosome 2A, and its functional roles in wheat resistance responses to FHB and sharp eyespot. <i>TaWAK2A-800</i> transcript abundance was elevated by the early infection of <i>R. cerealis</i> and <i>F. graminearum</i>, or treatment with exogenous chitin. The gene transcript seemed to correspond to the resistance of wheat. Further functional analyses showed that silencing <i>TaWAK2A-800</i> compromised the resistance of wheat to both FHB (<i>F. graminearum</i>) and sharp eyespot (<i>R. cerealis</i>). Moreover, the silencing reduced the expression levels of six defense-related genes, including the chitin-triggering immune pathway-marker genes, <i>TaCERK1</i>, <i>TaRLCK1B</i>, and <i>TaMPK3</i>. Summarily, <i>TaWAK2A-800</i> participates positively in the resistance responses to both <i>F. graminearum</i> and <i>R. cerealis</i>, possibly through a chitin-induced pathway in wheat. <i>TaWAK2A-800</i> will be useful for breeding wheat varieties with resistance to both FHB and sharp eyespot. |
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