Licciardello Grazia, Caruso Paola, Bella Patrizia, Boyer Claudine, Smith Malcolm W, Pruvost Olivier, Robene Isabelle, Cubero Jaime, Catara Vittoria
Dipartimento di Agricoltura Alimentazione e Ambiente, Università degli Studi di Catania, 95130 Catania, Italy.
Centro di Ricerca Olivicoltura, Frutticoltura e Agrumicoltura-Consiglio per la Ricerca in Agricoltura e L'analisi Dell'Economia Agraria (CREA), 95024 Acireale, Italy.
Microorganisms. 2022 May 8;10(5):986. doi: 10.3390/microorganisms10050986.
pv. () and pv. () are causal agents of Citrus Bacterial Canker (CBC), a devastating disease that severely affects citrus plants. They are harmful organisms not reported in Europe or the Mediterranean Basin. Host plants are in the Rutaceae family, including the genera , and , and their hybrids. In addition, other genera of ornamental interest are reported as susceptible, but results are not uniform and sometimes incongruent. We evaluated the susceptibility of 32 ornamental accessions of the Rutaceae family belonging to the genera , and , and three hybrids to seven strains of and . Pathotyping evaluation was assessed by scoring the symptomatic reactions on detached leaves. High variability in symptoms and bacterial population was shown among the different strains in the different hosts, indicative of complex host-pathogen interactions. The results are mostly consistent with past findings, with the few discrepancies probably due to our more complete experimental approach using multiple strains of the pathogen and multiple hosts. Our work supports the need to regulate non-citrus Rutaceae plant introductions into areas, like the EU and Mediterranean, that are currently free of this economically important pathogen.
野油菜黄单胞菌柑橘致病变种（Xanthomonas citri pv. citri）和野油菜黄单胞菌亚洲致病变种（Xanthomonas citri pv. asiatica）是柑橘溃疡病（Citrus Bacterial Canker，CBC）的病原体，柑橘溃疡病是一种严重影响柑橘类植物的毁灭性病害。它们是未在欧洲或地中海盆地报道过的有害生物。寄主植物属于芸香科，包括柑橘属（Citrus）、枳属（Poncirus）和金橘属（Fortunella）及其杂交种。此外，据报道其他一些具有观赏价值的属也易感，但结果并不一致，有时还相互矛盾。我们评估了芸香科32个属于柑橘属、枳属和金橘属的观赏品种以及三个杂交种对野油菜黄单胞菌柑橘致病变种和野油菜黄单胞菌亚洲致病变种的七个菌株的易感性。通过对离体叶片上的症状反应进行评分来评估致病型。不同寄主中不同菌株之间在症状和细菌群体方面表现出高度变异性，这表明寄主 - 病原体之间存在复杂的相互作用。结果大多与过去的研究结果一致，少数差异可能是由于我们使用多种病原体菌株和多种寄主的实验方法更为完善。我们的工作支持有必要对向欧盟和地中海等目前没有这种具有经济重要性的病原体的地区引入非柑橘类芸香科植物进行管控。
