Department of Entomology and Plant Pathology, Auburn University, Auburn, AL, U.S.A.
Institute for Sustainable Agriculture, Consejo Superior de Investigaciones Científicas (IAS-CSIC), 14004 Córdoba, Spain.
Plant Dis. 2024 Sep;108(9):2658-2662. doi: 10.1094/PDIS-12-23-2640-SC. Epub 2024 Aug 17.
Strains of the bacterial pathogen subspecies () and () isolated from symptomatic almond and olive plants in Spain and Italy were used in this study. Because of the risk of host jump and considering the importance of southern highbush blueberry production in Spain, we tested a small set of these strains for their potential to infect and cause disease symptoms in blueberries under greenhouse experiments. IVIA5901 (isolated from almonds in Alicante, Spain) caused symptoms similar to those caused by AlmaEm3 (isolated from blueberries in Georgia, U.S.A., and used as a reference strain capable of inducing severe symptoms in blueberry). Nevertheless, bacterial populations of IVIA5901 in planta were significantly lower than those of AlmaEm3. ESVL (isolated from almonds, Alicante, Spain) and XYL1961/18 (isolated from olives, Ibiza Island, Spain) caused limited symptoms, while XYL466/19 (isolated from wild olives, Mallorca Island, Spain) and XF3348 (isolated from almonds, Mallorca Island, Spain) and De Donno (isolated from olives, Puglia, Italy, and representative of the devastating olive quick decline syndrome) did not cause symptoms nor colonize blueberries. This study suggests that certain strains already found in Europe could infect blueberry if conditions conducive for a host jump in this region are met, such as proximity of blueberries to other infected hosts and presence of insect vectors that feed on these crops. Surveys on the presence of in blueberries in Spain and other European countries are needed to anticipate possible issues.
本研究使用了从西班牙和意大利有症状的杏仁和橄榄植物中分离出的细菌病原体亚种 () 和 () 菌株。由于宿主跳跃的风险，并且考虑到西班牙南高丛蓝莓生产的重要性，我们在温室实验中测试了一小部分这些菌株，以测试它们感染和引起蓝莓疾病症状的潜力。IVIA5901（从西班牙阿利坎特的杏仁中分离）引起的症状与 AlmaEm3（从美国佐治亚州的蓝莓中分离，用作能够在蓝莓中引起严重症状的参考菌株）引起的症状相似。然而，IVIA5901 在植物体内的细菌种群明显低于 AlmaEm3。ESVL（从西班牙阿利坎特的杏仁中分离）和 XYL1961/18（从西班牙伊比萨岛的橄榄中分离）引起的症状有限，而 XYL466/19（从西班牙马略卡岛的野生橄榄中分离）和 XF3348（从西班牙马略卡岛的杏仁中分离）和 De Donno（从意大利普利亚的橄榄中分离，代表毁灭性的橄榄快速衰退综合征）既没有引起症状也没有在蓝莓中定殖。本研究表明，如果该地区有利于宿主跳跃的条件得到满足，某些已经在欧洲发现的菌株可能会感染蓝莓，例如蓝莓与其他感染宿主的接近程度以及以这些作物为食的昆虫媒介的存在。需要对西班牙和其他欧洲国家蓝莓中存在的进行调查，以预测可能出现的问题。
