Hydathodes are organs found on aerial parts of a wide range of plant species that provide almost direct access for several pathogenic microbes to the plant vascular system. Hydathodes are better known as the site of guttation, which is the release of droplets of plant apoplastic fluid to the outer leaf surface. Because these organs are only described through sporadic allusions in the literature, this review aims to provide a comprehensive view of hydathode development, physiology, and immunity by compiling a historic and contemporary bibliography. In particular, we refine the definition of hydathodes.We illustrate their important roles in the maintenance of plant osmotic balance, nutrient retrieval, and exclusion of deleterious chemicals from the xylem sap. Finally, we present our current understanding of the infection of hydathodes by adapted vascular pathogens and the associated plant immune responses.

中文翻译：

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树叶中的红树林：上皮Hydathodes的解剖学，生理学和免疫性。

氢化物是在许多植物物种的空中部分发现的器官，几乎可以使几种病原微生物直接进入植物的血管系统。氢化物更好地被称为肠道点，这是植物质外生性液体的液滴向叶片外表面的释放。因为这些器官仅通过文献中的零星典故来描述，所以本综述旨在通过汇编历史和当代参考书目来提供有关斜纹肌发育，生理学和免疫力的全面观点。尤其是，我们完善了Hyhythothodes的定义，阐明了它们在维持植物渗透压平衡，营养物回收以及从木质部汁液中排除有害化学物质方面的重要作用。最后，