The Role of Cytokinin During Infection of Arabidopsis thaliana by the Cyst Nematode Heterodera schachtii
| Autor: | Carly Shanks, Tarek Hewezi, G. Eric Schaller, J Hollis Rice, Joseph J. Kieber, Yan O. Zubo |
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| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
0301 basic medicine Cytokinins Nematoda Physiology Green Fluorescent Proteins Mutant Arabidopsis Plant Roots 01 natural sciences 03 medical and health sciences chemistry.chemical_compound Gene Expression Regulation Plant Genes Reporter Botany medicine Animals Arabidopsis thaliana heterocyclic compounds Plant Diseases biology Arabidopsis Proteins fungi food and beverages General Medicine Biotic stress biology.organism_classification medicine.disease Cell biology 030104 developmental biology Nematode Nematode infection chemistry Mutation Cytokinin Disease Susceptibility Agronomy and Crop Science Heterodera schachtii Signal Transduction 010606 plant biology & botany |
| Zdroj: | Molecular Plant-Microbe Interactions®. 29:57-68 |
| ISSN: | 1943-7706 0894-0282 |
| DOI: | 10.1094/mpmi-07-15-0156-r |
| Popis: | Plant-parasitic cyst nematodes induce the formation of hypermetabolic feeding sites, termed syncytia, as their sole source of nutrients. The formation of the syncytium is orchestrated by the nematode, in part, by modulation of phytohormone responses, including cytokinin. In response to infection by the nematode Heterodera schachtii, cytokinin signaling is transiently induced at the site of infection and in the developing syncytium. Arabidopsis lines with reduced cytokinin sensitivity show reduced susceptibility to nematode infection, indicating that cytokinin signaling is required for optimal nematode development. Furthermore, lines with increased cytokinin sensitivity also exhibit reduced nematode susceptibility. To ascertain why cytokinin hypersensitivity reduces nematode parasitism, we examined the transcriptomes in wild type and a cytokinin-hypersensitive type-A arr Arabidopsis mutant in response to H. schachtii infection. Genes involved in the response to biotic stress and defense response were elevated in the type-A arr mutant in the absence of nematodes and were hyperinduced following H. schachtii infection, which suggests that the Arabidopsis type-A arr mutants impede nematode development because they are primed to respond to pathogen infection. These results suggest that cytokinin signaling is required for optimal H. schachtii parasitism of Arabidopsis but that elevated cytokinin signaling triggers a heightened immune response to nematode infection. |
| Databáze: | OpenAIRE |
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