Fiorenza Alberto, Gusella Giorgio, Aiello Dalia, Polizzi Giancarlo, Voglmayr Hermann
Department of Agriculture, Food and Environment (Di3A), University of Catania, Via S. Sofia 100, 95123 Catania, Italy.
Department of Botany and Biodiversity Research, University of Vienna, Rennweg 14, 1030 Vienna, Austria.
J Fungi (Basel). 2022 May 25;8(6):562. doi: 10.3390/jof8060562.
Avocado () represents an important emerging tropical crop in Italy, especially in the southern regions. In this study, young plants of avocado showing symptoms of stem and wood lesion, and dieback, were investigated. Isolations from symptomatic tissues consistently yielded colonies of -like species. The characterization of representative isolates was based on the observation of morphological characters, the effect of temperature on mycelial growth rate, and on the sequencing of three different gene regions, specifically ITS, , and . Phylogenetic analyses were conducted based on maximum parsimony and maximum likelihood approaches. The results showed the presence of two species, viz. and , the latter of which is here described as a new species. Pathogenicity tests were conducted using the mycelial plug technique on young potted avocado trees for both species. The results showed that both species were pathogenic to avocado. This study represents the first report of these two species affecting avocado and results in the description of a new species within the genus . Based on phylogeny, is combined in .
鳄梨（）是意大利一种重要的新兴热带作物，尤其是在南部地区。在本研究中，对表现出茎干和木质部病变以及枝枯症状的鳄梨幼苗进行了调查。从有症状的组织中分离培养始终能得到类似[具体物种名称未给出]的菌落。对代表性分离株的鉴定基于形态特征观察、温度对菌丝生长速率的影响以及对三个不同基因区域（即ITS、[具体基因名称未给出]和[具体基因名称未给出]）的测序。基于最大简约法和最大似然法进行了系统发育分析。结果显示存在两个物种，即[具体物种名称未给出]和[具体物种名称未给出]，后者在此被描述为一个新物种。使用菌丝块技术对两种[具体物种名称未给出]的盆栽鳄梨幼苗进行了致病性测试。结果表明这两个物种对鳄梨都具有致病性。本研究是这两个影响鳄梨的物种的首次报道，并导致了[具体属名未给出]属内一个新物种的描述。基于系统发育，[具体物种名称未给出]被归入[具体分类组合未明确]。
