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首页> 外文期刊>Plant Pathology >The ethylene receptor ETR1 is required for Fusarium oxysporum pathogenicity
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The ethylene receptor ETR1 is required for Fusarium oxysporum pathogenicity

机译：尖孢镰刀菌致病性需要乙烯受体ETR1

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摘要

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 etrl-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 etrl-1 plants with reduced vascular growth of the pathogen, suggesting the activation of defence mechanisms in etrl-1 plants against F. oxysporum. Furthermore, the early activation and increased accumulation of the SA-responsive PR1, PR2 and PR5 genes in the etrl-1 plants, in contrast to the Col-0 plants that showed higher transcript levels of the JA/ET-responsive PR3, PR4 and PDF 1.2 genes after F. oxysporum inoculation, can lead to speculation that F. oxysporum hijacks ETR1-mediated ethylene signalling to promote disease development in plants.
机译：尖孢镰刀菌（Fusarium oxysporum）是一种普遍存在的维管束枯萎植物病原体，在多种重要的经济作物中造成严重的产量损失。在这项研究中，尖镰孢之间的相互作用。 sp。研究了在水杨酸盐（SA），茉莉花酸盐（JA）和乙烯（ET）防御信号通路中受损的萝卜和拟南芥植物，以更好地了解这种植物微生物相互作用的性质。植物体内生物测定揭示了ETR1受体的关键作用，因为与其他突变体和Col-0植物相比，etrl-1突变体植物在统计学上表现出的镰孢枯萎症状更少。定量聚合酶链反应（qPCR）分析将etrl-1植物中症状严重程度的降低与病原体的血管生长降低联系起来，表明etrl-1植物中抗尖孢镰刀菌的防御机制被激活。此外，与etl-1植物中SA应答PR1，PR2和PR5基因的早期激活和积累增加相比，Col-0植物显示JA / ET应答PR3，PR4和PR的转录水平更高。 F. oxysporum接种后的PDF 1.2基因可能导致推测，F。oxysporum劫持了ETR1介导的乙烯信号，从而促进了植物的病害发展。

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