Citation for Study 15393
Secor G., Rivera-varas V., Christ D., Mathew F., Khan M., Varrelmann M., & Bolton M.D. 2014. Characterization of Fusarium secorum, a new species causing Fusarium yellowing decline of sugar beet in north central USA. Fungal Biology, 118(na): 764-775.
- Secor G.
- Rivera-varas V.
- Christ D.
- Mathew F.
- Khan M.
- Varrelmann M.
- Bolton M.D. (submitter) 701 239-1373
This study characterized a novel sugar beet (Beta vulgaris L.) pathogen from the Red River Valley in north central USA, which was formally named Fusarium secorum. Molecular phylogenetic analyses of three loci (translation elongation factor1α, calmodulin, mitochondrial small subunit) and the morphological species recognition concept strongly supported the inclusion of F. secorum in the Gibberella fujikuroi species complex (GFSC). Phylogenetic analyses identified F. secorum as a sister taxon of F. acutatum and a member of the African subclade of the GFSC. Fusarium secorum can be distinguished from all other known species morphologically by the production of circinate hyphae that may produce microconidia and abundant corkscrew-shaped hyphae in culture. To assess mycotoxin production potential, 45 typical secondary metabolites were tested in F. secorum rice cultures, but only beauvericin was produced in detectable amounts by each isolate. Results of pathogenicity experiments revealed that F. secorum isolates are able to induce half- and full-leaf yellowing foliar symptoms and vascular necrosis in roots and petioles of sugar beet. Inoculation with F. acutatum did not result in any disease symptoms. The sugar beet disease caused by F. secorum is named Fusarium yellowing decline.
Fusarium oxysporum f. sp. betae, genealogical concordance phylogenetic species recognition (GCPSR), phylogeny, taxonomy
- DOI: 10.1016/j.funbio.2014.06.001
- PMID: 25209635
- Other URL: http://www.sciencedirect.com/science/article/pii/S187861461400097X
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