Gupta Rupali, Leibman-Markus Meirav, Weiss Daniela, Spiegelman Ziv, Bar Maya
Department of Plant Pathology and Weed Research, Agricultural Research Organization, Volcani Institute, Rishon LeZion, Israel.
Front Plant Sci. 2023 Jun 12;14:1196456. doi: 10.3389/fpls.2023.1196456. eCollection 2023.
is the causative agent of gray mold disease, and infects more than 1400 plant species, including important crop plants. In tomato, causes severe damage in greenhouses and post-harvest storage and transport. Plant viruses of the genus cause significant damage to various crop species. In recent years, the tobamovirus tomato brown rugose fruit virus (ToBRFV) has significantly affected the global tomato industry. Most studies of plant-microbe interactions focus on the interaction between the plant host and a single pathogen, however, in agricultural or natural environments, plants are routinely exposed to multiple pathogens. Here, we examined how preceding tobamovirus infection affects the response of tomato to subsequent infection by . We found that infection with the tobamoviruses tomato mosaic virus (ToMV) or ToBRFV resulted in increased susceptibility to . Analysis of the immune response of tobamovirus-infected plants revealed hyper-accumulation of endogenous salicylic acid (SA), upregulation of SA-responsive transcripts, and activation of SA-mediated immunity. Deficiency in SA biosynthesis decreased tobamovirus-mediated susceptibility to , while exogenous application of SA enhanced symptoms. These results suggest that tobamovirus-mediated accumulation of SA increases the plants' susceptibility to , and provide evidence for a new risk caused by tobamovirus infection in agriculture.
是灰霉病的致病因子，可感染1400多种植物，包括重要的农作物。在番茄中，它会在温室以及收获后的储存和运输过程中造成严重损害。该属的植物病毒会对各种作物品种造成重大损害。近年来，烟草花叶病毒番茄褐色皱纹果病毒（ToBRFV）对全球番茄产业产生了重大影响。大多数关于植物与微生物相互作用的研究都集中在植物宿主与单一病原体之间的相互作用上，然而，在农业或自然环境中，植物经常会接触到多种病原体。在这里，我们研究了先前的烟草花叶病毒感染如何影响番茄对随后感染的反应。我们发现，感染烟草花叶病毒番茄花叶病毒（ToMV）或ToBRFV会导致对的易感性增加。对感染烟草花叶病毒的植物的免疫反应分析显示，内源性水杨酸（SA）过度积累，SA反应性转录本上调，以及SA介导的免疫激活。SA生物合成缺陷降低了烟草花叶病毒介导的对的易感性，而外源施用SA则加重了症状。这些结果表明，烟草花叶病毒介导的SA积累增加了植物对的易感性，并为农业中烟草花叶病毒感染引起的新风险提供了证据。
