Department of Microbiology and Immunology, Dalhousie University, Canada.
Department of Biology, University of Waterloo, Canada.
Innate Immun. 2021 Feb;27(2):143-157. doi: 10.1177/1753425920980512. Epub 2020 Dec 22.
is an opportunistic bacterial pathogen of plants. Unlike the well-characterized plant defense responses to highly adapted bacterial phytopathogens, little is known about plant response to infection. In this study, we examined the (canola) tissue-specific response to infection using RNA sequencing. Transcriptomic analysis of canola seedlings over a 5 day infection revealed that many molecular processes involved in plant innate immunity were up-regulated, whereas photosynthesis was down-regulated. Phytohormones control many vital biological processes within plants, including growth and development, senescence, seed setting, fruit ripening, and innate immunity. The three main phytohormones involved in plant innate immunity are salicylic acid (SA), jasmonic acid (JA), and ethylene (ET). Many bacterial pathogens have evolved multiple strategies to manipulate these hormone responses in order to infect plants successfully. Interestingly, gene expression within all three phytohormone (SA, JA, and ET) signaling pathways was up-regulated in response to infection. This study identified a unique plant hormone response to the opportunistic bacterial pathogen infection.
是一种植物机会致病菌。与高度适应的植物病原菌引起的植物防御反应不同，人们对植物对的感染反应知之甚少。在这项研究中，我们使用 RNA 测序研究了 （油菜）组织对感染的特异性反应。对油菜幼苗 5 天感染的转录组分析表明，许多参与植物先天免疫的分子过程被上调，而光合作用被下调。植物激素控制着植物内部的许多重要生物过程，包括生长发育、衰老、结实、果实成熟和先天免疫。参与植物先天免疫的三种主要植物激素是水杨酸（SA）、茉莉酸（JA）和乙烯（ET）。许多细菌病原体已经进化出多种策略来操纵这些激素反应，以成功感染植物。有趣的是，所有三种植物激素（SA、JA 和 ET）信号通路中的基因表达都因感染而被上调。这项研究确定了一种植物激素对机会致病菌感染的独特反应。
