Abstract
A new homothallic Phytophthora species, isolated from rhizosphere soil and roots of declining or dead Rubus anglocandicans (European blackberry) in south-west Western Australia, is described as Phytophthora bilorbang sp. nov. It produces non-papillate sporangia, smooth-walled oogonia containing thick-walled oospores, and paragynous antheridia. Although morphologically similar to several species within ITS Clade 6 and sub-clade II, namely P. gibbosa, P. gregata and P. megasperma, phylogenetic analyses of the ITS, cox1, HSP90, BT and NADH gene regions demonstrate that P. bilorbang sp. nov. is a distinct species. Additionally, P. bilorbang differs from these species in its growth and colony morphology on several media. Pathogenicity tests indicate that P. bilorbang could be responsible for the decline syndrome of blackberry within the Warren and Donnelly River catchments in the south-west of Western Australia.
Similar content being viewed by others
References
Abad, Z. G., Abad, J. A., Coffey, M. D., Oudemans, P. V., Man in’t Veld, W. A., de Gruyter, H., et al. (2008). Phytophthora bisheria sp. nov., a new species identified in isolates from the Rosaceous raspberry, rose and strawberry in three continents. Mycologia, 100, 99–110.
Amor, R., Richardson, R., Pritchard, G., & Bruzzese, E. (1998). Rubus fruticosus L. Agg. In F. Panetta, R. Groves, & R. Shepherd (Eds.), The biology of Australian weeds (pp. 225–246). Melbourne: RG & FJ Richardson.
Andjic, V., Cortinas, M. N., Hardy, G. E. St. J., Wingfield, M. J., & Burgess, T. I. (2007). Multiple gene genealogies reveal important relationships between species of Phaeophleospora infecting Eucalyptus leaves. FEMS Microbiology Letters, 268, 22–33.
Blair, J. E., Coffey, M. D., Park, S.-Y., Geiser, D. M., & Kang, S. (2008). A multi-locus phylogeny for Phytophthora utilizing markers derived from complete genome sequences. Fungal Genetics and Biology, 45, 266–277.
Brasier, C. M., Cooke, D. E. L., Duncan, J. M., & Hansen, E. M. (2003a). Multiple new phenotypic taxa from trees and riparian ecosystems in Phytophthora gonapodyides–P. megasperma ITS Clade 6, which tend to be high-temperature tolerant and either inbreeding or sterile. Mycological Research, 107, 277–290.
Brasier, C. M., Sanchez-Hernandez, E., & Kirk, S. A. (2003b). Phytophthora inundata sp. nov., a part heterothallic pathogen of trees and shrubs in wet or flooded soils. Mycological Research, 107, 477–484.
Bruzzese, E., Mahr, F., & Faithfull, I. (2000). Best practice management guide for environmental weeds: Blackberry, Rubus fruticosus aggregate, pp. 1–6. The Cooperative Research Centre for Weed Management Systems: Australia. Retrieved May 20, 2012, from http://www.weeds.org.au/WoNS/blackberry/docs/Blackberry_BPMG.pdf
Burgess, T. I., Webster, J. L., Ciampini, J. A., White, D. W., Hardy, G. E. St. J., & Stukely, M. J. C. (2009). Re-evaluation of Phytophthora species isolated during 30 years of vegetation health surveys in Western Australia using molecular techniques. Plant Disease, 93, 215–223.
Butcher, T. B., Stukely, M. J. C., & Chester, G. W. (1984). Genetic variation in resistance of Pinus radiata to Phytophthora cinnamomi. Forest Ecology and Management, 8, 197–220.
Cooke, D. E. L., Drenth, A., Duncan, J. M., Wagels, G., & Brasier, C. M. (2000). A molecular phylogeny of Phytophthora and related Oomycetes. Fungal Genetics and Biology, 30, 17–32.
Duncan, J. M., & Kennedy, D. M. (1987). Identities and pathogenicities of Phytophthora spp. causing root rot of red raspberry. Plant Pathology, 36, 276–289.
Ellis, M. A., Converse, R. H., Williams, R. N., & Williamson, B. (1991). Compendium of raspberry and blackberry diseases and insects. St. Paul: APS Press.
Ellis, M. A., Doohan, D., Bordelon, B., Welty, C., Williams, R. N., Funt, R. C., et al. (2004). Midwest Small Fruit Pest Management Handbook. The Ohio State University Bulletin, 861, 70. Retrieved March, 2012, from http://ohioline.osu.edu/b861/pdf/ch03_70-73.pdf
Erwin, D. C., & Ribeiro, O. K. (1996). Phytophthora diseases worldwide. St. Paul: APS Press.
Evans, K. J., & Weber, H. E. (2003). Rubus anglocandicans (Rosaceae) is the most widespread taxon of European blackberry in Australia. Australian Systematic Botany, 16, 527–537.
Hansen, E. M., & Delatour, C. (1999). Phytophthora species in oak forests of north-east France. Annales des Sciences Forestières, 56, 539–547.
Hüberli, D., Tommerup, I. C., & Hardy, G. E. St. J. (2000). False-negative isolations or absence of lesions may cause mis-diagnosis of diseased plants infected with Phytophthora cinnamomi. Australasian Plant Pathology, 29, 164–169.
Jung, T., & Burgess, T. I. (2009). Re-evaluation of Phytophthora citricola isolates from multiple woody hosts in Europe and North America reveals a new species. Phytophthora plurivora sp. nov. Persoonia, 22, 95–110.
Jung, T., Blaschke, M., & Neumann, P. (1996). Isolation, identification and pathogenicity of Phytophthora species from declining oak stands. European Journal of Forest Pathology, 26, 253–272.
Jung, T., Cooke, D. E. L., Blaschke, H., Duncan, J. M., & Oβwald, W. (1999). Phytophthora quercina sp. nov., causing root rot of European oaks. Mycological Research, 103, 785–798.
Jung, T., Blaschke, H., & Oβwald, W. (2000). Involvement of soilborne Phytophthora species in Central European oak decline and the effect of site factors on the disease. Plant Pathology, 49, 706–718.
Jung, T., Stukely, M. J. C., Hardy, G. E. St. J., White, D., Paap, T., Dunstan, W. A., & Burgess, T. I. (2011). Multiple new Phytophthora species from ITS clade 6 associated with natural ecosystems in Australia: evolutionary and ecological implications. Persoonia, 26, 13–39.
Kennedy, D. M., & Duncan, J. M. (1995). A papillate Phytophthora species with specificity to Rubus. Mycological Research, 99, 57–68.
Kroon, L. P. N. M., Bakker, F. T., van den Bosch, G. B. M., Bonants, P. J. M., & Fliera, W. G. (2004). Phylogenetic analysis of Phytophthora species based on mitochondrial and nuclear DNA sequences. Fungal Genetics and Biology, 41, 766–782.
Martin, F. N., & Tooley, P. W. (2003). Phylogenetic relationships among Phytophthora species inferred from sequence analysis of mitochondrially encoded cytochrome oxidase I and II genes. Mycologia, 95, 269–284.
Morin, L., & Evans, K. J. (2011). Rubus fruticosus L. aggregate - European blackberry. In M. Julien, R. McFadyen, & J. Cullen (Eds.), Biological control of weeds in Australia (pp. 499–509). Melbourne: CSIRO Publishing.
Morin, L., Evans, K., Jourdan, M., Gomez, D. R., & Scott, J. K. (2011). Sourcing additional genetically distinct isolates of the rust fungus Phragmidium violaceum to enhance biological control of European blackberry in Australia. European Journal of Plant Pathology, 131, 289–303.
Rea, A., Jung, T., Burgess, T. I., Stukely, M. J. C., & Hardy, G. E. St. J. (2010). Phytophthora elongata sp. nov. a novel pathogen from the Eucalyptus marginata forest of Western Australia. Australasian Plant Pathology, 39, 477–491.
Reeser, P., Sutton, W., & Hansen, E. (2011a). Phytophthora species in tanoak trees, canopy-drip, soil, and streams in the sudden oak death epidemic area of south-western Oregon, USA. New Zealand Journal of Forestry Science, 41S, S65–S73.
Reeser, P. W., Sutton, W., Hansen, E. M., Remigi, P., & Adams, G. C. (2011b). Phytophthora species in forest streams in Oregon and Alaska. Mycologia, 103, 22–35.
Ronquist, F., & Heuelsenbeck, J. P. (2003). MrBayes 3: Bayesian phylogenetic inference under mixed models. Bioinformatics, 19, 1572–1574.
Sakalidis, M. L., Hardy, G. E. St. J., & Burgess, T. I. (2011). Endophytes and potential pathogens of the baobab species Adansonia gregorii; a focus on the Botryosphaeriaceae. Fungal Ecology, 4, 1–14.
Swofford, D. L. (2003). Phylogenetic analysis using parsimony (*and other methods). Version 4. (eds). Sunderland, Massachusetts: Sinauer Associates.
Washington, W. S. (1988). Phytophthora cryptogea as a cause of root rot of raspberry in Australia; resistance of raspberry cultivars and control by fungicides. Plant Pathology, 37, 225–230.
White, T. J., Bruns, T., Lee, S., & Taylor, J. (1990). Amplification and direct sequencing of fungal ribosomal RNA genes for phylogenetics. In M. A. Innes, D. H. Gelfand, J. J. Sninsky, & T. J. White (Eds.), PCR protocols: A guide to methods and applications (pp. 315–322). San Diego: Academic.
Wilcox, W. F., & Latorre, B. A. (2002). Identities and geographic distributions of Phytophthora spp. causing root rot of red raspberry in Chile. Plant Disease, 86, 1357–1362.
Wilcox, W. F., Scott, P. H., Hamm, P. B., Kennedy, D. M., Duncan, J. M., Brasier, C. M., et al. (1993). Identity of a Phytophthora species attacking raspberry in Europe and North America. Mycological Research, 97, 817–831.
Acknowledgements
The authors are grateful to the Western Australian Department of Environment and Conservation for funding, the Ministry of Science, Research and Technology of Iran for financially supporting the senior author, Paul Yeoh (CSIRO Ecosystem Science, WA) and Lee Fontanini (Warren Catchments Council, Manjimup, WA) for field help, Diane White (CPSM, Murdoch University, WA) for technical support, Thomas Jung (Phytophthora Research and Consultancy, Brannenburg, Germany) for assistance with morphology and József Bakonyi (Plant Protection Institute, Centre for Agricultural Research, Hungarian Academy of Sciences) for providing sequence data for several species.
Author information
Authors and Affiliations
Corresponding author
Electronic supplementary material
Below is the link to the electronic supplementary material.
Table S1
Morphological characters, dimensions and temperature-growth relations of Phytophthora bilorbang, P. gibbosa, P. gregata and P. megasperma. Characters decisive for species discrimination are highlighted in bold. (DOCX 106 kb)
Rights and permissions
About this article
Cite this article
Aghighi, S., Hardy, G.E.S.J., Scott, J.K. et al. Phytophthora bilorbang sp. nov., a new species associated with the decline of Rubus anglocandicans (European blackberry) in Western Australia. Eur J Plant Pathol 133, 841–855 (2012). https://doi.org/10.1007/s10658-012-0006-5
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10658-012-0006-5