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Phomopsis husk rot of macadamia in Australia and South Africa caused by novel Diaporthe species
- Source :
- Plant Pathology. 69:911-921
- Publication Year :
- 2020
- Publisher :
- Wiley, 2020.
-
Abstract
- Phomopsis husk rot (PHR) in macadamia is a disease of economic importance in major commercial production areas in Australia and South Africa. Effective control of PHR is hindered by limited knowledge about its aetiology and epidemiology. The diversity and pathogenicity of more than 50 isolates of Diaporthe associated with PHR in macadamia orchards in Australia and South Africa was assessed. Multilocus phylogenetic analyses of DNA sequences of the ITS, tef1α, and tub2 gene loci revealed four novel clades that are described as Diaporthe australiana sp. nov., D. drenthii sp. nov., D. macadamiae sp. nov., and D. searlei sp. nov. Pathogenicity tests with representative isolates found that all four species caused PHR of varying severity between and within species, as well as between the two macadamia cultivars HAES 344 and HAES 816. The Australian species, D. australiana, was the most aggressive species compared with the three South African species. This study improves our understanding of the aetiology of PHR in macadamia and paves the way for more effective disease management.
- Subjects :
- 0106 biological sciences
0301 basic medicine
Phylogenetic tree
education
Plant Science
Horticulture
Biology
biology.organism_classification
01 natural sciences
Husk
Proteaceae
03 medical and health sciences
030104 developmental biology
Phomopsis
Diaporthe
Disease management (agriculture)
Genetics
Cultivar
Clade
Agronomy and Crop Science
010606 plant biology & botany
Subjects
Details
- ISSN :
- 13653059 and 00320862
- Volume :
- 69
- Database :
- OpenAIRE
- Journal :
- Plant Pathology
- Accession number :
- edsair.doi...........6182d9ae7c5d382ac6a41379eb7acb94