Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/85236
DC FieldValueLanguage
dc.creatorChaojen Wangen_US
dc.creatorYisheng Linen_US
dc.creatorYinghong Linen_US
dc.creatorWenhsin Chungen_US
dc.date2013-06-07zh_TW
dc.date.accessioned2014-12-03T08:36:00Z-
dc.date.available2014-12-03T08:36:00Z-
dc.identifier.urihttp://hdl.handle.net/11455/85236-
dc.description.abstractPrevious investigations demonstrated that Fusarium oxysporum (Fo), which is not pathogenic to cucumbers, could serve as abiological control agent for managing Fusarium wilt of cucumber caused by Fo f. sp. cucumerinum (Foc) in Taiwan. However,thus far it has not been possible to separate the populations of pathogenic Fo from the nonpathogenic isolates that havebiological control potential through their morphological characteristics. Although these two populations can bedistinguished from one another using a bioassay, the work is laborious and time-consuming. In this study, a fragment of theintergenic spacer (IGS) region of ribosomal DNA from an Fo biological control agent, Fo366, was PCR-amplified withpublished general primers, FIGS11/FIGS12 and sequenced. A new primer, NPIGS-R, which was designed based on the IGSsequence, was paired with the FIGS11 primer. These primers were then evaluated for their specificity to amplify DNA fromnonpathogenic Fo isolates that have biological control potential. The results showed that the modified primer pair, FIGS11/NPIGS-R, amplified a 500-bp DNA fragment from five of seven nonpathogenic Fo isolates. These five Fo isolates delayedsymptom development of cucumber Fusarium wilt in greenhouse bioassay tests. Seventy-seven Fo isolates were obtainedfrom the soil and plant tissues and then subjected to amplification using the modified primer pair; six samples showedpositive amplification. These six isolates did not cause symptoms on cucumber seedlings when grown in peat moss infestedwith the isolates and delayed disease development when the same plants were subsequently inoculated with a virulentisolate of Foc. Therefore, the modified primer pair may prove useful for the identification of Fo isolates that arenonpathogenic to cucumber which can potentially act as biocontrol agents for Fusarium wilt of cucumber.en_US
dc.format.medium期刊論文zh_TW
dc.language.isoen_USzh_TW
dc.relationPlos one, Volume 8, Issue 6.en_US
dc.relation.urihttp://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0065093zh_TW
dc.titleModified Primers for the Identification of NonpathogenicFusarium oxysporum Isolates That Have BiologicalControl Potential against Fusarium Wilt of Cucumber inTaiwanen_US
dc.identifier.doi10.1371/journal.pone.0065093zh_TW
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