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dc.contributorVirginia Tech. Hampton Roads Agricultural Research and Extension Center
dc.contributorPennsylvania State University. Department of Plant Pathology
dc.contributorUniversity of Maryland. Department of Plant Science and Landscape Architecture
dc.contributorUniversity of Maryland. Department of Environmental Science and Technology
dc.contributor.authorHong, Chuanxue
dc.contributor.authorRichardson, Patricia A.
dc.contributor.authorHao, Wei
dc.contributor.authorGhimire, Sita R.
dc.contributor.authorKong, Ping
dc.contributor.authorMoorman, Gary W.
dc.contributor.authorLea-Cox, John D.
dc.contributor.authorRoss, David S.
dc.date.accessioned2015-04-23T19:19:06Z
dc.date.available2015-04-23T19:19:06Z
dc.date.issued2012-04
dc.identifier.citationHong, C. X., Richardson, P. A., Hao, W., Ghimire, S. R., Kong, P., Moorman, G. W., Lea-Cox, J. D. & Ross, D. S. (2012). Phytophthora aquimorbida sp nov and Phytophthora taxon 'aquatilis' recovered from irrigation reservoirs and a stream in Virginia, USA. Mycologia, 104(5), 1097-1108. doi: 10.3852/11-055
dc.identifier.issn0027-5514
dc.identifier.urihttp://hdl.handle.net/10919/51775
dc.description.abstractTwo distinct subgroups (L2 and A(-2)) were recovered from irrigation reservoirs and a stream in Virginia, USA. After molecular, morphological and physiological examinations, the L2 subgroup was named Phytophthora aquimorbida and the A(-2) designated as Phytophthora taxon 'aquatilis'. Both taxa are homothallic. P. aquimorbida is characterized by its noncaducous and nonpapillate sporangia, catenulate and radiating hyphal swellings and thick-walled plerotic oospores formed in globose oogonia mostly in the absence of an antheridium. P. taxon 'aquatilis' produces plerotic oospores in globose oogonia mostly with a paragynous antheridium. It has semi-papillate, caducous sporangia with variable pedicels, but it does not have hyphal swelling. Analyses of ITS, CO1, beta-tubulin and NADH1 sequences revealed that P. aquimorbida is closely related to P. hydropathica, P. irrigata and P. parsiana, and P. taxon 'aquatilis' is related to P. multivesiculata. The optimum temperature for culture growth is 30 and 20 C for E aquimorbida and P. taxon 'aquatilis' respectively. Both taxa were pathogenic to rhododendron plants and caused root discoloration, pale leaves, wilting, tip necrosis and dieback. Their plant biosecurity risk also is discussed.
dc.description.sponsorshipNational Institute of Food and Agriculture (U.S.) - 2005-51101-02337
dc.description.sponsorshipNational Institute of Food and Agriculture (U.S.) - 2010-51181-21140
dc.format.extent12 pages
dc.format.mimetypeapplication/pdf
dc.language.isoen_US
dc.publisherMycological Society of America
dc.subjectAquatic environment
dc.subjectBiosecurity
dc.subjectPhytophthora aquimorbida
dc.subjectP. taxon aquatilis
dc.titlePhytophthora aquimorbida sp nov and Phytophthora taxon 'aquatilis' recovered from irrigation reservoirs and a stream in Virginia, USA
dc.typeArticle
dc.identifier.urlhttp://www.mycologia.org/content/104/5/1097
dc.date.accessed2015-04-21
dc.title.serialMycologia
dc.identifier.doihttps://doi.org/10.3852/11-055
dc.type.dcmitypeText


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