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| Web URL(s): | https://turf.rutgers.edu/research/abstracts/symposium2002.pdf#page=45
Last checked: 02/06/2017
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Notes: Item is within a single large file |
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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Hillman, Bradley I.;
Glasheen, Bernadette M.;
Morton, Craig;
Clarke, Bruce B. |
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| Author Affiliation: | Department of Plant Biology and Pathology, Rutgers University |
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| Title: | Variability of Colletotrichum graminicola, the pathogen causing anthracnose disease of annual bluegrass and bentgrass |
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| Section: | Poster presentations
Other records with the "Poster presentations" Section
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| Meeting Info.: | Cook College, Rutgers, NJ: January 10-11, 2002 |
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| Source: | Proceedings of the Eleventh Annual Rutgers TurfgrassSymposium. 2002, p. 44. |
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| Publishing Information: | New Brunswick, NJ: Center for Turfgrass Science, Cook College, Rutgers, The State University of New Jersey |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Agrostis; Anthracnose; Colletotrichum graminicola; Disease control; Fungicide evaluation; Pathogens; Poa annua
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| Abstract/Contents: | "Colletotrichum graminicola is an ascomycete fungus that causes anthracnose diseases of many grass hosts, including corn, sorghum, and turfgrass. Anthracnose is an important disease of annual bluegrass (Poa annua) and is increasingly seen as a problem on creeping bentgrass (Agrostis spp.). Although it has for years been a concern on golf course turf, anthracnose is now recognized as a major problem on turfgrass in the United States. C. graminicola can cause two distinct syndromes: a foliar blight evident as visible lesions of leaves, and a basal stem rot that can result in the death of the plant. Of the two, the bassal stem rot is more serious, representing a threat of growing proportions to Poa/bentgrass greens. Anthracnose basal stem rot remains poorly understood and is difficult to control. Using morphology, pathogenicity tests, and RAPD analysis, Browning et al. (1999) found variations in turf-infecting isolates of C. graminicola that appeared to be more geographically associated than host associated. However, results using RAPD markers were not definitive. In a recent project, P. Zhu examined anthracnose diseases of cranberry caused by different Colletotrichum isolates and species. Among the key findings of that study were that there was considerable variability in fungicide sensitivity of Colletotrichum isolates from different cranberry fields, and that this variability could be correlated with differences in fingerprint profiles of the isolates. The latter studies were done using a moderately repetitive fingerprint probe representing a retrotransposon of the fungus. One of the implications of the study was that genomic stress to the fungus in the form of specific fungicides may have resulted in retrotransposon activation and subsequent mutation/variation of the fungus. This year, we intitiated a project to Colletotrichum graminicola isolates from Poa annua and Agrostis greens from various locations in the Northeast that have been subjected over the last few years to different fungicide application regimes. This was done to determine whether a correlation similar to the one reported by Zhu and coworkers could be identified for this turfgrass pathogen. C. graminicola was isolated from creeping bentgrass and annual bluegrass greens exhibiting symptoms of the anthracnose disease. A pathogenic isolate of C. graminicola was used to generate a partial genomic library, and will be used to generate a complete library in 2002. Using the partial library, we have begun to identify moderately repetitive sequences that can be used as a finger print probe to examine the population of C. graminicola isolates using DNA hybridization methods. Several possibly useful clones have been identified, and will be examined further. Variation in morphology, pathology, and fingerprint pattern of C. graminicola isolates will next be examined and correlated with host species, geographic location, symptom type, fungicide regime, and time of epidemic. Results from this project should increase our understanding of the variation within C. graminicola populations in the Northeast and help in the development of suitable control measures, including breeding for resistance to the pathogen." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is an abstract only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Hillman, B. I., B. M. Glasheen, C. Morton, and B. B. Clarke. 2002. Variability of Colletotrichum graminicola, the pathogen causing anthracnose disease of annual bluegrass and bentgrass. Proc. Annu. Rutgers Turfgrass Symp. p. 44. |
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| Web URL(s):
https://turf.rutgers.edu/research/abstracts/symposium2002.pdf#page=45
Last checked: 02/06/2017
Requires: PDF Reader
Notes: Item is within a single large file |
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MSU catalog number: SB 433 .R88 |
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