Pathogenicity and copper tolerance in Australian Xanthomonas species associated with bacterial leaf spot
Article
Article Title | Pathogenicity and copper tolerance in Australian Xanthomonas species associated with bacterial leaf spot |
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ERA Journal ID | 5304 |
Article Category | Article |
Authors | Roach, R. (Author), Mann, R. (Author), Gambley, C. G. (Author), Shivas, R. G. (Author), Chapman, T. (Author) and Rodoni, B. (Author) |
Journal Title | Crop Protection |
Journal Citation | 127, pp. 1-11 |
Number of Pages | 11 |
Year | 2020 |
Publisher | Elsevier |
Place of Publication | Netherlands |
ISSN | 0261-2194 |
1873-6904 | |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.cropro.2019.104923 |
Web Address (URL) | https://www.sciencedirect.com/science/article/pii/S0261219419302698#! |
Abstract | Recent studies into the distribution of Xanthomonas species causing Bacterial Leaf Spot (BLS) in Australian solanaceous crops detail varied genomic profiles that may influence pathogenicity. These genomic studies are expanded upon here by reporting the pathogenicity, race and copper tolerance of the previously sequenced Xanthomonas strains. Capsicum (Yolo Wonder), tomato (Grosse Lisse) and differential lines of capsicum (Early Cal-Wonder) were used to determine pathogenicity and race. Copper tolerance of 44 Xanthomonas strains was measured by observing bacterial growth on copper sulphate amended media. Protein sequence associated with these traits was detected using genomic analysis and compared using protein alignments. Only strains of X. euvesicatoria (16 strains) were found to be pathogenic on both tomato and capsicum. These were determined to be race 4 and 9. High copper tolerance was detected in the majority of Xanthomonas strains tested. Multiple copper resistance and avirulence proteins were detected in genomic sequence. Relatively few of these were associated with plasmid sequences. The genomic basis for copper tolerance was determined to be complex, as the tolerance thresholds did not directly correlate with gene number or presence. Similarly, pathogenicity of the strains was also not always clearly linked with presence or absence of specific Avr genes. This study highlights the need for detailed and ongoing investigations into the function of these proteins and how they produce the phenotypes that affect crop production. |
Keywords | Pathogenicity; Copper tolerance; Race |
ANZSRC Field of Research 2020 | 300804. Horticultural crop protection (incl. pests, diseases and weeds) |
310701. Bacteriology | |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | La Trobe University |
Department of Agriculture and Fisheries, Queensland | |
Macarthur Agricultural Institute | |
Open access url | https://www.sciencedirect.com/science/article/pii/S0261219419302698#! |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q56wy/pathogenicity-and-copper-tolerance-in-australian-xanthomonas-species-associated-with-bacterial-leaf-spot
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