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Phytophthora aquimorbida sp nov and Phytophthora taxon 'aquatilis' recovered from irrigation reservoirs and a stream in Virginia, USA

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dc.contributor.authorHong, Chuanxueen
dc.contributor.authorRichardson, Patricia A.en
dc.contributor.authorHao, Weien
dc.contributor.authorGhimire, Sita R.en
dc.contributor.authorKong, Pingen
dc.contributor.authorMoorman, Gary W.en
dc.contributor.authorLea-Cox, John D.en
dc.contributor.authorRoss, David S.en
dc.contributor.departmentVirginia Agricultural Experiment Stationen
dc.coverage.countryUnited Statesen
dc.coverage.stateVirginiaen
dc.date.accessed2015-04-21en
dc.date.accessioned2015-04-23T19:19:06Zen
dc.date.available2015-04-23T19:19:06Zen
dc.date.issued2012-04en
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.en
dc.description.sponsorshipNational Institute of Food and Agriculture (U.S.) - 2005-51101-02337en
dc.description.sponsorshipNational Institute of Food and Agriculture (U.S.) - 2010-51181-21140en
dc.format.extent12 pagesen
dc.format.mimetypeapplication/pdfen
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: 10.3852/11-055en
dc.identifier.doihttps://doi.org/10.3852/11-055en
dc.identifier.issn0027-5514en
dc.identifier.urihttp://hdl.handle.net/10919/51775en
dc.identifier.urlhttp://www.mycologia.org/content/104/5/1097en
dc.language.isoenen
dc.publisherMycological Society of Americaen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectAquatic environmenten
dc.subjectBiosecurityen
dc.subjectPhytophthora aquimorbidaen
dc.subjectP. taxon aquatilisen
dc.titlePhytophthora aquimorbida sp nov and Phytophthora taxon 'aquatilis' recovered from irrigation reservoirs and a stream in Virginia, USAen
dc.title.serialMycologiaen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten

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