The role of water in plant-microbe interactions.
The role of water in plant-microbe interactions.
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DOI：
10.1111/tpj.13795
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发表时间：
2018-03
期刊：
影响因子：
--
通讯作者：
He SY
中科院分区：
文献类型：
--
作者：
Aung K;Jiang Y;He SY
植物在其一生中与各种微生物相关联，包括共生微生物、共生微生物和病原微生物。病原体在遗传上适应于在宿主植物中侵略性地定殖和增殖以引起疾病。然而，疾病的爆发只发生在允许的环境条件下。宿主、病原体和环境之间的相互作用被称为“疾病三角”。在环境因素中，降雨事件，这往往会造成一段时间的高大气湿度，已多次被证明是促进植物疾病的爆发，这表明水的可用性是至关重要的发病机制。在病原体感染过程中，受感染叶片上的水浸斑经常被观察到作为疾病的早期症状。最近的研究表明，病原细菌专门的毒力蛋白，在高湿度下的叶片质外体内创造一个含水的生活空间。质外体环境中的水可用性和可能相关的其他变化可以决定潜在致病微生物的成功。这些新发现强化了这样一种观点，即水的争夺可能是植物和病原体之间的主要战场。在这篇文章中，我们将讨论水的可用性对宿主-微生物相互作用的作用，重点是植物-细菌相互作用。
Plants are associated with various microorganisms throughout their life, including commensal, symbiotic and pathogenic microorganisms. Pathogens are genetically adapted to aggressively colonize and proliferate in host plants to cause disease. However, disease outbreaks occur only under permissive environmental conditions. The interplay between host, pathogen and environment is famously known as the “disease triangle”. Among the environmental factors, rainfall events, which often create a period of high atmospheric humidity, have repetitively been shown to promote disease outbreaks in plants, suggesting that water availability is crucial for pathogenesis. During pathogen infection, water-soaking spots on the infected leaves are frequently observed as an early symptom of disease. Recent studies showed that pathogenic bacteria dedicate specialized virulence proteins to create an aqueous living space inside the leaf apoplast under high humidity. Water availability in and likely associated other changes to the apoplastic environment can determine the success of potentially pathogenic microbes. These new findings reinforce the notion that the fight over water may be a major battleground between plants and pathogens. In this article, we will discuss the role of water availability on host-microbe interactions, with a focus on plant-bacterial interactions.
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