Skip to Main Content
PCR-based identification of Erysiphe pulchra and Phyllactinia guttata from Cornus florida using ITS-specific primersAuthor(s): M. T. Mmbaga; N. B. Klopfenstein; M. -S. Kim; N. C. Mmbaga
Source: Forest Pathology. 34: 321-328.
Publication Series: Scientific Journal (JRNL)
Station: Rocky Mountain Research Station
PDF: Download Publication (160.52 KB)
DescriptionThe internal transcribed spacer (ITS) regions of rDNA and the intervening 5.8S rRNA gene for the powdery mildew fungi Erysiphe (sect. Microsphaera) pulchra and Phyllactinia guttata were amplified using standard polymerase chain reaction (PCR) protocols and the universal primer pairs, ITS1 and ITS4. PCR products for ITS were analysed by electrophoresis in a 1.5% agarose gel and sequenced. The size of the amplified ITS products (approximately 650 bp) were not sufficiently different to allow reliable differentiation of E. pulchra and P. guttata; however, their sequences were distinct. Specific primers for E. pulchra and P. guttata were developed and evaluated for use as diagnostic tools. The diagnostic band size from E. pulchra-specific primer pair was 568 bp while the P. guttata band was 597 bp; the two primer pairs were highly specific to E. pulchra and P. guttata. Comparison of ITS sequences with information in the GenBank showed a very close similarity between sequences of E. pulchra isolates from Cornus florida in the USA and isolates collected on Cornus kousa in Japan. BLAST analysis of the sequence of the 650-bp band from P. guttata revealed a close alignment with sequences of P. moricola (92%), P. kakicola (94%), and P. fraxini (92%). The sequence of P. guttata in C. florida also had a 98% identity with P. guttata in Calycanthus occidentalis and 94% identity with P. guttata in Corylus cornuta.
- You may send email to email@example.com to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationMmbaga, M. T.; Klopfenstein, N. B.; Kim, M. -S.; Mmbaga, N. C. 2004. PCR-based identification of Erysiphe pulchra and Phyllactinia guttata from Cornus florida using ITS-specific primers. Forest Pathology. 34: 321-328.
Keywordsinternal transcribed spacer (ITS), rDNA, Erysiphe pulchra, Phyllactinia guttata, Cornus florida
- Effects of understory fire management treatments on California Hazelnut, an ecocultural resource of the Karuk and Yurok Indians in the Pacific Northwest
- Development of SCAR Markers for the DNA-Based Detection of the Asian Long-Horned Beetle; Anoplophora glabripennis (Motschulsky)
- Developing new microsatellite markers in walnut (Juglans regia L.) from Juglans nigra genomic GA enriched library
XML: View XML