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- Title
The ethylene receptor ETR1 is required for Fusarium oxysporum pathogenicity.
- Authors
Pantelides, I. S.; Tjamos, S. E.; Pappa, S.; Kargakis, M.; Paplomatas, E. J.
- Abstract
Fusarium oxysporum is a ubiquitous vascular wilt plant pathogen causing severe yield losses in a wide range of economically important crops. In this study, the interaction between Fusarium oxysporum f. sp. raphani and Arabidopsis thaliana plants impaired in the salicylate ( SA), jasmonate ( JA) and ethylene ( ET) defence signalling pathways was investigated to better understand the nature of this plant-microbe interaction. The in planta bioassays revealed a key role for the ETR1 receptor as the etr1-1 mutant plants exhibited statistically less Fusarium wilt symptoms compared to the other mutant and Col-0 plants. Quantitative polymerase chain reaction ( qPCR) analysis associated the decrease in symptom severity shown in etr1-1 plants with reduced vascular growth of the pathogen, suggesting the activation of defence mechanisms in etr1-1 plants against F. oxysporum. Furthermore, the early activation and increased accumulation of the SA-responsive PR1, PR2 and PR5 genes in the etr1-1 plants, in contrast to the Col-0 plants that showed higher transcript levels of the JA/ ET-responsive PR3 , PR4 and PDF1.2 genes after F. oxysporum inoculation, can lead to speculation that F. oxysporum hijacks ETR1-mediated ethylene signalling to promote disease development in plants.
- Subjects
FUSARIUM oxysporum; ETHYLENE receptors; PATHOGENICITY of L-form bacteria; WILT diseases; PHYTOPATHOGENIC microorganisms; ARABIDOPSIS thaliana; CELLULAR signal transduction
- Publication
Plant Pathology, 2013, Vol 62, Issue 6, p1302
- ISSN
0032-0862
- Publication type
Article
- DOI
10.1111/ppa.12042