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Open Access A new Cytospora species pathogenic on Carpobrotus edulis in its native habitat

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Carpobrotus edulis (Aizoaceae) is a fleshy creeper, native to South Africa and commonly found growing on coastal seashores. Recently this plant has been observed dying in large patches in areas close to Cape Town. Symptoms include a wilting of the leaves associated with death of the woody stems. The aim of this study was to identify the probable cause of this disease. Dead and dying stem tissues were found to be colonised by a species of Cytospora. Isolates of this fungus were identified based on DNA sequence data from the rDNA-ITS, translation elongation factor 1-α, β-tubulin and large subunit rDNA loci. Analyses of the data showed that the fungus is a new species of Cytospora, described here as Cytospora carpobroti sp. nov. Pathogenicity tests showed that C. carpobroti resulted in distinct lesions on inoculated stems but not the fleshy leaves. The origin of C. carpobroti is unknown and there is concern that it could be an introduced pathogen threatening the health of this important native plant.
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Document Type: Research Article

Publication date: 01 December 2018

This article was made available online on 12 June 2018 as a Fast Track article with title: "A new Cytospora species pathogenic on Carpobrotus edulis in its native habitat".

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  • Fungal Systematics and Evolution is an international, peer-reviewed, open-access, full colour, fast-track journal. Papers will include reviews, research articles, methodology papers, taxonomic monographs, and the description of fungi. The journal strongly supports good practice policies, and requires voucher specimens to be deposited in a fungarium, cultures in long-term genetic resource collection, sequences in GenBank, alignments in TreeBASE, and taxonomic novelties in MycoBank.
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