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首页> 外文期刊>MycoKeys >Liberomyces pistaciae sp. nov., the causal agent of pistachio cankers and decline in Italy
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Liberomyces pistaciae sp. nov., the causal agent of pistachio cankers and decline in Italy

机译：黄连菌属十一月，开心果溃疡的诱因和意大利的衰落

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A new canker and decline disease of pistachio (Pistacia vera) is described from Sicily (Italy). Observations of the disease and sampling of the causal agent started in spring 2010, in the area where this crop is typically cultivated, Bronte and Adrano (Catania province) and later extended to the Agrigento and Caltanissetta provinces. Isolations from the margins of twig, branch and stem cankers of declining plants resulted in fungal colonies with the same morphology. Pathogenicity tests on 5-year-old potted plants of Pistacia vera grafted on P. terebinthus reproduced similar symptoms to those observed in nature and the pathogen was confirmed to be a coloniser of woody plant tissue. Comparison of our isolates with the type of the apparently similar Asteromella pistaciarum showed that our isolates are morphologically and ecologically different from A. pistaciarum, the latter being a typical member of Mycosphaerellaceae. Asteromella pistaciarum is lectotypified, described and illustrated and it is considered to represent a spermatial morph of Septoria pistaciarum. Multi-locus phylogenies based on two (ITS and LSU rDNA) and three (ITS, rpb2 and tub2) genomic loci revealed isolates of the canker pathogen to represent a new species of Liberomyces within the Delonicicolaceae (Xylariales), which is here described as Liberomyces pistaciaesp. nov. (Delonicicolaceae, Xylariales). The presence of this fungus in asymptomatic plants with apparently healthy woody tissues indicates that it also has a latent growth phase. This study improves the understanding of pistachio decline, but further studies are needed for planning effective disease management strategies and ensuring that the pathogen is not introduced into new areas with apparently healthy, but infected plants.
机译：西西里岛（意大利）描述了一种开心果（Pistacia vera）的新型溃疡病和衰退病。对这种疾病的观察和病原体取样始于2010年春季，在勃朗特和阿德拉诺（卡塔尼亚省）通常种植农作物的地区，后来扩展到阿格里真托和卡尔塔尼塞塔省。从下降的植物的树枝，分支和茎鳞缘的边缘分离出具有相同形态的真菌菌落。对嫁接在白僵菌上的5年生黄连木盆栽植物的致病性测试与在自然界中观察到的症状相似，并且病原体被证实是木本植物组织的定殖者。将我们的分离物与明显相似的黄芪气荚膜菌的类型进行比较，结果表明我们的分离物在形态和生态学上不同于黄曲霉，后者是霉菌科的典型成员。黄皮气单胞菌经过电化，描述和说明，被认为代表了黄曲霉的精子形态。基于两个（ITS和LSU rDNA）和三个（ITS，rpb2和tub2）基因组位点的多基因组系统发育揭示了溃疡病病原体的分离物代表了Delonicicolaceae（Xylariales）中的新的利比里亚菌属，在这里被称为Liberomyces黄连木十一月（Delonicicolaceae，Xylariales）。这种真菌在具有明显健康木本组织的无症状植物中的存在表明它也具有潜在的生长期。这项研究增进了对开心果下降的认识，但是还需要进一步的研究来计划有效的疾病管理策略，并确保病原体不会被引入具有明显健康但受感染植物的新区域。

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