A high-temperature tolerant species in clade 9 of the genus Phytophthora: P-hydrogena sp nov

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dc.contributor.authorYang, Xiaoen
dc.contributor.authorGallegly, Mannon E.en
dc.contributor.authorHong, Chuanxueen
dc.contributor.departmentSchool of Plant and Environmental Sciencesen
dc.date.accessed2015-04-21en
dc.date.accessioned2015-04-23T19:36:26Zen
dc.date.available2015-04-23T19:36:26Zen
dc.date.issued2014-01en
dc.description.abstractA previously unknown Phytophthora species was isolated from irrigation water in Virginia, USA. This novel species produces abundant noncaducous and nonpapillate sporangia in soil water extract solution. It sometimes produces chlamydospores and hyphal swellings in aged cultures and in Petri's solution. This species has optimum vegetative growth at 30 C and grows well at 35 C. The lowest and highest temperatures for growth are 5 and 40 C. All isolates examined in this study are compatibility type A1 and produce mostly plerotic oospores when paired with an A2 mating-type tester of P. cinnamomi. Sequence analyses of the rDNA internal transcribed spacer (ITS) regions and the mitochondrially encoded cytochrome c oxidase 1 (cox 1) gene placed this species in clade 9 of the genus Phytophthora. These characteristics support the description of this taxon as a new species for which we propose the name P. hydrogena sp. nov. Further phylogenetic and physiological investigations of clade 9 species revealed a high-temperature tolerant cluster including P. hydrogena, P. aquimorbida, P. hydropathica, P. irrigata, P. chrysanthemi, P. insolita, P. polonica and P. parsiana. These species all grow well at 35 C. The monophyly of the species in this heat-tolerant cluster except P. insolita and P. polonica is highly supported by the maximum-likelihood analyses of the ITS and cox 1 sequences.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.extent9 pagesen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationYang, X. G., Mannon E. & Hong, C. X. (2014). A high-temperature tolerant species in clade 9 of the genus Phytophthora: P-hydrogena sp nov. Mycologia, 106(1), 57-65. doi: 10.3852/13-043en
dc.identifier.doihttps://doi.org/10.3852/13-043en
dc.identifier.issn0027-5514en
dc.identifier.urihttp://hdl.handle.net/10919/51777en
dc.identifier.urlhttp://www.mycologia.org/content/106/1/57en
dc.language.isoenen
dc.publisherMycological Society of Americaen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectClade 9en
dc.subjectHigh-temperature toleranceen
dc.subjectIrrigation wateren
dc.subjectPhytophthora hydrogenaen
dc.titleA high-temperature tolerant species in clade 9 of the genus Phytophthora: P-hydrogena sp noven
dc.title.serialMycologiaen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten

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