Vascular Pathogenicity of Xanthomonas vasicola pv. vasculorum in Maize Is Modulated by Tissue-Specific Host Resistance.

IF 3.1 2区 农林科学 Q2 PLANT SCIENCES
Alexander Mullens, Tao Zhong, Alexander Lipka, Peter Balint-Kurti, Tiffany Jamann
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引用次数: 0

Abstract

How host genotype shapes pathogen tissue tropism remains poorly understood. Vascular and nonvascular tissues represent distinct habitats within a plant for bacteria to colonize. Host plants often utilize different mechanisms to defend themselves against vascular and nonvascular pathogens and mechanisms of resistance employed by the host can vary by organ. Xanthomonas vasicola pv. vasculorum (Xvv) is an emerging bacterial maize pathogen, and this pathosystem offers an opportunity to study how host resistance differs in response to the vascular and nonvascular lifestyles exhibited by a single bacterial phytopathogen. We used different inoculation techniques to induce vascular and nonvascular disease and evaluated maize populations using both techniques to map resistance to vascular and non-vascular disease caused by Xvv. Xvv can colonize both vascular and nonvascular tissues, depending on the genotype. Different inoculation techniques can be used to induce vascular or nonvascular colonization. Independent loci control variation in resistance to Xvv during vascular pathogenesis and nonvascular pathogenesis. We confirmed the role of those regions in resistance to vascular and nonvascular infection. This study offers insights into how host resistance shapes how bacterial pathogens adapt to both vascular and nonvascular lifestyles. We show that host genotype can dictate which tissues a pathogen can infect. This system can serve as a model to understand tissue-specific host resistance to plant pathogens and tissue specificity in pathogens.

血管黄单胞菌的血管致病性。组织特异性寄主抗性调控玉米维管束形成。
宿主基因型如何影响病原体的组织趋向性仍然知之甚少。维管组织和非维管组织代表了植物中不同的栖息地,供细菌定植。寄主植物通常利用不同的机制来保护自己免受维管和非维管病原体的侵害,而寄主采用的抗性机制因器官而异。血管黄单胞菌。维管菌(vasculorum, xv)是一种新兴的玉米细菌性病原体,这种病原菌系统为研究寄主对单一细菌植物病原体所表现出的血管和非血管生活方式的抗性差异提供了机会。我们使用不同的接种技术诱导维管病和非维管病,并利用这两种技术评估玉米群体对Xvv引起的维管病和非维管病的抗性。根据基因型的不同,xv可以在血管和非血管组织中定植。不同的接种技术可用于诱导血管或非血管定植。在血管发病和非血管发病过程中,独立基因座控制着对xv的抗性变异。我们证实了这些区域在抵抗血管和非血管感染中的作用。这项研究提供了关于宿主耐药性如何塑造细菌病原体如何适应血管和非血管生活方式的见解。我们发现宿主基因型可以决定病原体可以感染哪些组织。该系统可作为了解植物病原菌组织特异性抗性和病原菌组织特异性的模型。
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来源期刊
Phytopathology
Phytopathology 生物-植物科学
CiteScore
5.90
自引率
9.40%
发文量
505
审稿时长
4-8 weeks
期刊介绍: Phytopathology publishes articles on fundamental research that advances understanding of the nature of plant diseases, the agents that cause them, their spread, the losses they cause, and measures that can be used to control them. Phytopathology considers manuscripts covering all aspects of plant diseases including bacteriology, host-parasite biochemistry and cell biology, biological control, disease control and pest management, description of new pathogen species description of new pathogen species, ecology and population biology, epidemiology, disease etiology, host genetics and resistance, mycology, nematology, plant stress and abiotic disorders, postharvest pathology and mycotoxins, and virology. Papers dealing mainly with taxonomy, such as descriptions of new plant pathogen taxa are acceptable if they include plant disease research results such as pathogenicity, host range, etc. Taxonomic papers that focus on classification, identification, and nomenclature below the subspecies level may also be submitted to Phytopathology.
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