Phylogeny and pathogenicity of Stemphylium species associated with Fabaceae in Australia

Vaghefi, Niloofar and Thompson, Susan M. and Kimber, Rohan B.E. and Thomas, Geoff J. and Kant, Pragya and Barbetti, Martin J. and van Leur, Joop A.G. (2020) Phylogeny and pathogenicity of Stemphylium species associated with Fabaceae in Australia. Mycological Progress, 19. pp. 381-396. ISSN 1617-416X


Abstract

This study was initiated to elucidate the taxonomy and host range of Stemphylium species associatedwith leaf spot of faba bean in Australia. A three-locus phylogenetic analysis of 41 isolates collected from faba bean and other Fabaceae and Brassicaceae crops was constructed employing the internal transcribed spacers and the intervening 5.8S region of the nuclear ribosomal DNA, glyceraldehyde 3-phosphate dehydrogenase, and calmodulin sequences. The results indicated that more than one Stemphylium species occurs on faba bean (Vicia faba), chickpea (Cicer arientinum), lentil (Lens culinaris), and narrow-leafed lupin (Lupinus angustifolius) in Australia. Five Stemphylium species (S. astragali, S. beticola, S. eturmiunum, S. simmonsii, and S. vesicarium) were found associated with legume crops, of which S. astragali is a new report for Australia. Although isolates obtained from faba bean were retrieved within S. eturmiunum and S. vesicarium clades, those pathogenic to faba bean belonged to S. eturmiunum, a species not previously reported on faba bean. Interestingly, some S. eturmiunum isolates obtained from faba bean and other legumes were unable to infect faba bean, which indicated the potential presence of formae speciales within this species. The ability of S. eturmiunum isolates to cause plant death in susceptible faba bean varieties within only a few days emphasises the need for incorporation of Stemphylium blight resistance into faba bean breeding programs. Also, further research
into the biology and epidemiology of the disease is warranted.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Faculty/School / Institute/Centre: Current - Institute for Life Sciences and the Environment - Centre for Crop Health (24 Mar 2014 -)
Faculty/School / Institute/Centre: Current - Institute for Life Sciences and the Environment - Centre for Crop Health (24 Mar 2014 -)
Date Deposited: 14 Jul 2020 02:32
Last Modified: 27 Jul 2020 01:11
Uncontrolled Keywords: beticolaeturmiunum; Grey leaf spot; simmonsii; Stemphylium astragali
Fields of Research (2008): 06 Biological Sciences > 0607 Plant Biology > 060704 Plant Pathology
06 Biological Sciences > 0605 Microbiology > 060505 Mycology
07 Agricultural and Veterinary Sciences > 0703 Crop and Pasture Production > 070308 Crop and Pasture Protection (Pests, Diseases and Weeds)
Fields of Research (2020): 31 BIOLOGICAL SCIENCES > 3108 Plant biology > 310805 Plant pathology
31 BIOLOGICAL SCIENCES > 3107 Microbiology > 310705 Mycology
30 AGRICULTURAL, VETERINARY AND FOOD SCIENCES > 3004 Crop and pasture production > 300409 Crop and pasture protection (incl. pests, diseases and weeds)
Identification Number or DOI: https://doi.org/10.1007/s11557-020-01566-8
URI: http://eprints.usq.edu.au/id/eprint/38581

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