@ARTICLE{TreeBASE2Ref16766, author = {Lizel Mostert and Pedro W. Crous and Ji-Chuan Kang and Alan John Lander Phillips}, title = {Species of Phomopsis and a Libertella sp. occurring on grapevines with specific reference to South Africa: morphological, cultural, molecular and pathological characterization.}, year = {2001}, keywords = {Diaporthe; Phomopsis cane and leaf spot; Phomopsis viticola; systematics}, doi = {}, url = {http://www.jstor.org/stable/3761612}, pmid = {}, journal = {Mycologia}, volume = {93}, number = {1}, pages = {146--167}, abstract = {Phomopsis viticola is the cause of Phomopsis cane and leaf spot disease of grapevines. In the present study, 61 isolates were collected from 58 different vineyards in the vine growing areas of the Western Cape province of South Africa. Four different taxa have previously been associated with grapevines in Australia. Three of the latter taxa, and a Phomopsis species commonly associated with shoot blight of peaches in the U.S.A., P. amygdali, were identified among the South African isolates. 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 described as taxon 5. Species delimitation was primarily based on alpha conidium and conidiophore morphology, cultural characteristics, pathogenicity to Vitis, 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). P. amygdali was isolated once only and appeared to be of lesser importance in this disease complex. Furthermore, taxa 1 (D. perjuncta) and 3 were also rarely encountered and proved to be non-pathogenic, indicating their non-functional role in Phomopsis cane and leaf spot disease. Taxon 2 (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 taxon 2 corresponded best with P. viticola, which was also neotypified in this study.} }

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