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首页> 外文期刊>Mycologia >Species of Phomopsis and a Libertella sp occurring on grapevines withspecific reference to South Africa: morphological, cultural, molecular andpathological characterization
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Species of Phomopsis and a Libertella sp occurring on grapevines withspecific reference to South Africa: morphological, cultural, molecular andpathological characterization

机译：葡萄树上出现的拟噬菌属和Libertella菌种，具体针对南非：形态，文化，分子和病理学特征

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In order to clarify the taxonomy of species of Phomopsis associated with grapevines, 61 isolates were obtained from 58 different vineyards in the grapevine growing areas of the Western Cape province of South Africa. Species delimitation was primarily based on alpha conidium and conidiophore morphology, cultural characteristics, pathogenicity to Vitis vinifera, and the ability to form the teleomorph in vitro. The identity of each taxon was confirmed by means of phylogenetic analyses of the nuclear ribosomal DNA internal transcribed spacers (5.8S, ITS1 and ITS2) and the 5' end partial sequence of the mitochondrial small subunit (mtSSU). We also re-examined the four taxa that previously had been associated with grapevines in Australia. Three of the latter taxa, and a Phomopsis species commonly associated with shoot blight of peaches in the USA, P. amygdali, were identified among the South African isolates. Phomopsis amygdali was isolated once only and appeared to be of lesser importance in this disease complex. Furthermore, Diaporthe perjuncta and Phomopsis sp. 1 were also rarely encountered and proved to be nonpathogenic, indicating their nonfunctional role in Phomopsis cane and leaf spot disease. Phomopsis viticola was common and widely distributed throughout diseased vineyards. This taxon was associated with the typical cane and leaf spot disease symptoms and proved to be highly virulent. Morphologically collections designated in previous studies as taxon 2 corresponded best with P. viticola, which was also neotypified in this study. Examination of the Australian culture designated as taxon 4 revealed it to be a species of Libertella, thus excluding it from the P. viticola complex. An Italian isolate was found to represent a species of Phomopsis not previously known from grapevines, and this was subsequently designated as Phomopsis sp. 2. A key to taxa of Phomopsis from grapevine is also provided.
机译：为了阐明与葡萄藤相关的番茄属植物的分类学，从南非西开普省葡萄藤生长地区的58个不同葡萄园中获得了61个分离株。物种划分主要基于α分生孢子和分生孢子的形态，文化特征，对葡萄的致病性以及在体外形成远形体的能力。通过对核糖体DNA内部转录间隔区（5.8S，ITS1和ITS2）和线粒体小亚基（mtSSU）的5'端部分序列进行系统发育分析，可以确认每个分类单元的身份。我们还重新检查了澳大利亚以前与葡萄藤相关的四个分类单元。在南非分离株中，鉴定出了后者的三个分类单元，以及在美国通常与桃的枯萎病相关的番茄属物种。扁桃体仅分离一次，并且在该疾病复合物中显得次要。此外，Diaporthe perjuncta和Phomopsis sp。 1也很少遇到，并被证明是非致病性的，表明它们在甘薯和叶斑病中无功能。黄萎病菌很常见，并在病态的葡萄园中广泛分布。该分类单元与典型的甘蔗和叶斑病症状相关，并被证明具有高毒性。在先前的研究中被指定为分类群2的形态学集合与葡萄球菌（P. viticola）最为吻合，该葡萄球菌也在本研究中被新类型化。对被称为分类群4的澳大利亚文化的检查表明，它是Libertella的一种，因此将其排除在葡萄球菌之外。发现一种意大利分离物代表以前从未从葡萄树中获知的拟杆菌属，后来被命名为拟杆菌属。 2.还提供了从葡萄到拟南芥属的分类单元的密钥。

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