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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
Paraphoma chlamydocopiosa sp. nov. and Paraphoma pye sp. nov., two new species associated with leaf and crown infection of pyrethrum
Plant Pathology, Volume 67, No. 1, Year 2018
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Description
Two new pathogens of pyrethrum, described as Paraphoma chlamydocopiosa and Paraphoma pye, isolated from necrotic leaf lesions on pyrethrum plants in northern Tasmania, Australia, were identified using morphological characters, phylogenetic analysis of the internal transcribed spacer (ITS), elongation factor 1-α (EF1-α) and β-tubulin (TUB) genes, and pathogenicity bioassays. Bootstrap support in the combined and individual gene region phylogenetic trees supported the two species that were significantly different from the closely related P. chrysanthemicola and P. vinacea. Morphological characteristics also supported the two new species, with conidia of P. chlamydocopiosa being considerably longer and wider than either P. chrysanthemicola or P. vinacea, and P. pye being distinct in forming bilocular pycnidia. Glasshouse pathogenicity tests based on root dip inoculation resulted in P. chlamydocopiosa and P. pye infecting the crown and upper root tissues of pyrethrum plants, and significant reduction in biomass 2 months after inoculation. Both of these Paraphoma species caused leaf lesions during in vitro and in vivo bioassays 2 weeks after foliar spray inoculation. Although P. chlamydocopiosa and P. pye were shown to be crown rot pathogens, they were also commonly isolated from leaves of diseased plants in pyrethrum fields of northern Tasmania. © 2017 British Society for Plant Pathology
Authors & Co-Authors
Moslemi, A.
Australia, Melbourne
University of Melbourne
Ades, Peter Kevin
Australia, Melbourne
University of Melbourne
Crous, Pedro Willem
Australia, Melbourne
University of Melbourne
Netherlands, Utrecht
Westerdijk Fungal Biodiversity Institute - Knaw
Taylor, P. W.J.
Australia, Melbourne
University of Melbourne
Statistics
Citations: 20
Authors: 4
Affiliations: 3
Identifiers
Doi:
10.1111/ppa.12719
ISSN:
00320862
Research Areas
Genetics And Genomics