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dc.contributor.authorKong, Pen_US
dc.contributor.authorHong, Cen_US
dc.date.accessioned2016-12-19T16:03:18Z
dc.date.available2016-12-19T16:03:18Z
dc.date.issued2014-05-13en_US
dc.identifier.citationBMC Microbiology. 2014 May 13;14(1):124
dc.identifier.issn1471-2180en_US
dc.identifier.urihttp://hdl.handle.net/10919/73719
dc.description.abstractBackground The genus Phytophthora includes a group of agriculturally important pathogens and they are commonly regarded as water molds. They produce motile zoospores that can move via water currents and on their own locomotion in aquatic environments. However, zoosporic response to dissolved oxygen, an important water quality parameter, is not known. Like other water quality parameters, dissolved oxygen concentration in irrigation reservoirs fluctuates dramatically over time. The aim of this study was to determine whether and how zoospore survival may be affected by elevated and low concentrations of dissolved oxygen in water to better understand the aquatic biology of these pathogens in irrigation reservoirs. Results Zoospores of P. megasperma, P. nicotianae, P. pini and P. tropicalis were assessed for survival in 10% Hoagland’s solution at a range of dissolved concentrations from 0.9 to 20.1-mg-L-1 for up to seven exposure times from 0 to 72-h. Zoospore survival was measured by resultant colony counts per ml. Zoospores of these species survived the best in control Hoagland’s solution at dissolved oxygen concentrations of 5.3 to 5.6-mg-L-1. Zoospore survival rates decreased with increasing and decreasing concentration of dissolved oxygen, depending upon Phytophthora species and exposure time. Overall, P. megasperma and P. pini are less sensitive than P. nicotianae and P. tropicalis to hyperoxia and hypoxia conditions. Conclusion Zoospores in the control solution declined over time and this natural decline process was enhanced under hyperoxia and hypoxia conditions. These findings suggest that dramatic fluctuations of dissolved oxygen in irrigation reservoirs contribute to the population decline of Phytophthora species along the water path in the same reservoirs. These findings advanced our understanding of the aquatic ecology of these pathogens in irrigation reservoirs. They also provided a basis for pathogen risk mitigation by prolonging the turnover time of runoff water in recycling irrigation systems via better system designs.
dc.format.extent? - ? (8) page(s)en_US
dc.format.mimetypeapplication/pdf
dc.languageEnglishen_US
dc.publisherBiomed Central Ltden_US
dc.relation.urihttp://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000336179300001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=930d57c9ac61a043676db62af60056c1en_US
dc.rightsCreative Commons Attribution 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjectMicrobiologyen_US
dc.subjectMICROBIOLOGYen_US
dc.subjectPhytophthora speciesen_US
dc.subjectAquatic ecologyen_US
dc.subjectZoospore survivalen_US
dc.subjectDissolved oxygenen_US
dc.subjectCARBON DIOXIDE TENSIONSen_US
dc.subjectIRRIGATION WATERen_US
dc.subjectGROWTHen_US
dc.subjectFUNGIen_US
dc.subjectPYTHIUMen_US
dc.subjectNICOTIANAEen_US
dc.subjectCINNAMOMIen_US
dc.subjectBACTERIAen_US
dc.subjectRAMORUMen_US
dc.subjectMOLDSen_US
dc.titleOxygen stress reduces zoospore survival of Phytophthora species in a simulated aquatic systemen_US
dc.typeArticle - Refereed
dc.description.versionPublished (Publication status)en_US
dc.rights.holderPing Kong et al.; licensee BioMed Central Ltd.
dc.title.serialBMC MICROBIOLOGYen_US
dc.identifier.doihttps://doi.org/10.1186/1471-2180-14-124
dc.identifier.volume14en_US
dc.type.dcmitypeText
pubs.organisational-group/Virginia Tech
pubs.organisational-group/Virginia Tech/Agriculture & Life Sciences
pubs.organisational-group/Virginia Tech/Agriculture & Life Sciences/CALS T&R Faculty
pubs.organisational-group/Virginia Tech/Agriculture & Life Sciences/Hampton Roads AREC
pubs.organisational-group/Virginia Tech/All T&R Faculty


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Creative Commons Attribution 4.0 International
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