In-depth evaluation of root infection systems with the vascular fungus Verticillium longisporum as soil-borne model pathogen

In-depth evaluation of root infection systems with the vascular fungus Verticillium longisporum as soil-borne model pathogen
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以维管真菌长孢黄萎病为土传模型病原体的根部侵染系统的深入评价

DOI:
10.1101/2020.12.28.424556
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发表时间:
2020
期刊:
bioRxiv
影响因子:
--
通讯作者:
Fröschel
Fröschel
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--
文献类型:
--
作者:
Fröschel

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虽然叶子更容易用于分析植物防御,但根隐藏在土壤中,导致研究土壤相互作用的困难。用模式根病原体感染模式植物的接种策略在文献中有描述,但仍然需要获得方法学的概述。为了解决这一挑战,本研究利用拟南芥寄主植物的模型根病原体长孢黄萎病菌,并为选择合适的感染系统来研究植物如何应对根病原体提供建议。结果介绍了一种新的根感染系统,对现有的两种根感染系统进行了精确的描述和优化。介绍了逐步的方案,并附有致病性测试,吲哚-硫代葡萄糖苷标记基因的转录分析和使用报告结构的独立确认。评估了每种感染系统的优缺点。总的来说,结果证实了吲哚-硫代葡萄糖苷作为次级代谢物的重要性,限制了verticilliumin在其寄主植物中的繁殖。结论为研究宿主防御策略和对病毒的反应提供了详细的帮助。longisporumis提供。此外,其他土壤传播的微生物(如V。大丽花或模式植物,如经济上重要的油菜和番茄,可以在描述的感染系统中引入。因此,这些经过验证的手册可以为您的特定研究问题找到根感染系统,以进一步破译根与微生物的相互作用。
BackgroundWhile leaves are far more accessible for analysing plant defences, roots are hidden in the soil, leading to difficulties in studying soil-borne interactions. Inoculation strategies for infecting model plants with model root pathogens are described in the literature, but it remains demanding to obtain a methodological overview. To address this challenge, this study uses the model root pathogenVerticillium longisporumonArabidopsis thalianahost plants and provides recommendations for selecting appropriate infection systems to investigate how plants cope with root pathogens.ResultsA novel root infection system is introduced, while two existing ones are precisely described and optimized. Step-by-step protocols are presented and accompanied by pathogenicity tests, transcriptional analyses of indole-glucosinolate marker genes and independent confirmations using reporter constructs. Advantages and disadvantages of each infection system are assessed. Overall, the results validate the importance of indole-glucosinolates as secondary metabolites that limit theVerticilliumpropagation in its host plant.ConclusionDetailed assistances on studying host defence strategies and responses againstV. longisporumis provided. Furthermore, other soil-borne microorganisms (e.g.,V. dahliae) or model plants, such as economically important oilseed rape and tomato, can be introduced in the infection systems described. Hence, these proven manuals can support finding a root infection system for your specific research questions to further decipher root-microbe interactions.
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期刊: --
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