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| Web URL(s): | https://conference.ifas.ufl.edu/iftbc2019/documents/IFTBC-2019-Online-Abstract-Book.pdf#page=57
Last checked: 04/04/2024
Requires: PDF Reader
Notes: Item is within a single large file |
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| Publication Type:
| Report |
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| Author(s): | Duncan, Max J.;
Harmon, P. F. |
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| Author Affiliation: | Duncan: Masters Student, Plant Pathology Department, University of Florida, Gainesville, FL and Rapid Turfgrass Diagnostician, Rapid Turf Program, University of Florida, Gainesville, FL; Harmon: Plant Pathology Department, University of Florida, Gainesville, FL |
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| Title: | Inhibition of Gaeumannomyces graminis var. graminis by soil inhabitting bacteria associated with St. Augustinegrass |
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| Meeting Info.: | Lake Buena Vista, Florida: March 24-27, 2019 |
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| Source: | International Forage & Turf Breeding Conference. 2019, p. 57. |
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| Publishing Information: | Gainesville, Florida: UF/IFAS Office of Conferences & Institutes |
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| # of Pages: | 1 |
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| Abstract/Contents: | "Take-all root rot (TARR) caused by the fungal pathogen Gaeumannomyces graminis var. graminis (GGG) is a difficult-to-manage and economically important disease with no consistently reliable fungicide options for St. Augustinegrass (Stenotaphrum secundatum) lawns. Host plant resistance and biological control are two attractive options for limiting TARR with many technical challenges. Our objectives were to develop an artificial GGG inoculation protocol to assess the relative susceptibility of 24 St. Augustinegrass lines, and to utilize a coplating assay to detect bacteria antagonistic to GGG. Antagonistic bacteria present in the rhizosphere of wheat monocultures naturally suppress a related take-all wheat disease caused by G. graminis var. tritici in the welldocumented natural suppression known as take-all decline. We surveyed the St. Augustinegrass rhizospheres of long-term (> 5 yr) sod production fields in Florida for antagonistic bacteria in the genera Pseudomonas and Streptomyces. Isolates of Pseudomonas spp. were identified by fluorescence on Kings medium B (KMB). Gram positive bacteria including Streptomyces spp. were isolated on inorganic salts starch (ISP4) medium, and sporulating colonies were transferred to Tryptic Soy Broth (TSB). Inhibition of GGG was observed for some isolates tested with co-plating assays on quarter strength PDA. Inoculation with oat seed infested with GGG under 70% shade resulted in significantly different TARR severity among the 24 lines of St. Augustinegrass. Bacterial isolates that inhibited the growth of GGG were identified to species and stored for future research that will focus on field testing isolates using a similar inoculation method." |
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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):
Duncan, M. J., and P. F. Harmon. 2019. Inhibition of Gaeumannomyces graminis var. graminis by soil inhabitting bacteria associated with St. Augustinegrass. International Forage & Turf Breeding Conference. p. 57. |
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| Web URL(s):
https://conference.ifas.ufl.edu/iftbc2019/documents/IFTBC-2019-Online-Abstract-Book.pdf#page=57
Last checked: 04/04/2024
Requires: PDF Reader
Notes: Item is within a single large file |
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