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  • 1
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    Calonectria (Cylindrocladium) species associated with dying Pinus cuttings (2009)
    In:  Persoonia - Molecular Phylogeny and Evolution of Fungi vol. 23 no. 1, pp. 41-47
    Details
    Publication Date: 2024-01-12
    Description: Calonectria (Ca.) species and their Cylindrocladium (Cy.) anamorphs are well-known pathogens of forest nursery plants in subtropical and tropical areas of the world. An investigation of the mortality of rooted Pinus cuttings in a commercial forest nursery in Colombia led to the isolation of two Cylindrocladium anamorphs of Calonectria species.\nThe aim of this study was to identify these species using DNA sequence data and morphological comparisons.\nTwo species were identified, namely one undescribed species, and Cy. gracile, which is allocated to Calonectria as Ca. brassicae. The new species, Ca. brachiatica, resides in the Ca. brassicae species complex. Pathogenicity tests with Ca. brachiatica and Ca. brassicae showed that both are able to cause disease on Pinus maximinoi and P. tecunumanii. An emended key is provided to distinguish between Calonectria species with clavate vesicles and 1-septate macroconidia.
    Keywords: \xce\xb2-tubulin ; Calonectria ; Cylindrocladium ; histone ; Pinus ; root disease
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
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  • 2
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    Calonectria species associated with cutting rot of Eucalyptus (2010)
    In:  Persoonia - Molecular Phylogeny and Evolution of Fungi vol. 24 no. 1, pp. 1-11
    Details
    Publication Date: 2024-01-12
    Description: Decline in the productivity of Eucalyptus hybrid cutting production in the Guangdong Province of China is linked to cutting rot associated with several Calonectria spp. The aim of this study was to identify these fungi using morphological and DNA sequence comparisons. Two previously undescribed Calonectria spp., Ca. pseudoreteaudii sp. nov. and Ca. cerciana sp. nov. were identified together with Ca. pauciramosa. Calonectria pseudoreteaudii resides in the Ca. reteaudii complex and Ca. cerciana is closely related to Ca. morganii. Connected to the discovery of Ca. pseudoreteaudii, species in the Ca. reteaudii complex were re-considered and the group is shown to accommodate two cryptic species. These originate from Australia and are described as Ca. queenslandica sp. nov. and Ca. terrae-reginae sp. nov.
    Keywords: Australia ; Calonectria ; China ; Cylindrocladium ; Eucalyptus ; systematics
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
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  • 3
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    Calonectria spp. causing leaf spot, crown and root rot of ornamental plants in Tunisia (2012)
    In:  Persoonia - Molecular Phylogeny and Evolution of Fungi vol. 27 no. 1, pp. 73-79
    Details
    Publication Date: 2024-04-10
    Description: Calonectria spp. are important pathogens of ornamental plants in nurseries, especially in the Northern Hemisphere. They are commonly associated with a wide range of disease symptoms of roots, leaves and shoots. During a recent survey in Tunisia, a number of Calonectria spp. were isolated from tissues of ornamental plants showing symptoms of leaf spot, crown and root rot. The aim of this study was to identify these Calonectria spp. using morphological and DNA sequence comparisons. Two previously undescribed Calonectria spp., C. pseudomexicana sp. nov. and C. tunisiana sp. nov., were recognised. Calonectria mexicana and C. polizzii are newly reported for the African continent. Pathogenicity tests with all four Calonectria spp. showed that they are able to cause disease on seedlings of Callistemon spp., Dodonaea viscosa, Metrosideros spp. and Myrtus communis.
    Keywords: Calonectria ; crown and root rot ; DNA phylogeny ; leaf spot ; pathogenicity ; systematics
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
    Format: application/pdf
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