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DOI: | 10.1094/PHYTO.2009.99.6.S1 |
Web URL(s): | http://apsjournals.apsnet.org/doi/pdf/10.1094/PHYTO.2009.99.6.S1#page=97 Last checked: 06/11/2009 Requires: PDF Reader Notes: Item is within a single large file |
Publication Type:
| Report |
Content Type: | Abstract or Summary only |
Author(s): | Orshinsky, A. M.;
Boland, G. J. |
Author Affiliation: | University of Guelph, Guelph, Ontario, Canada |
Title: | Colonization of nonwounded and wounded creeping bentgrass (Agrostis stolonifera) by virulent and hypovirulent isolates of Sclerotinia homoeocarpa |
Section: | Abstracts submitted for presentation at the 2009 APS annual meeting Other records with the "Abstracts submitted for presentation at the 2009 APS annual meeting" Section
|
Meeting Info.: | Portland, Oregon: August 1-5, 2009 |
Source: | Phytopathology. Vol. 99, No. 6, June Supplement 2009, p. S97-S98. |
Publishing Information: | St. Paul, MN: American Phytopathological Society |
# of Pages: | 2 |
Keywords: | TIC Keywords: Agrostis stolonifera; Dollar spot; Hypovirulence; Sclerotinia homoeocarpa; Viruses
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Abstract/Contents: | "Sclerotinia homoeocarpa causes dollar spot disease of turf grass. Hypovirulent isolates of S. homoeocarpa contain the mitochondrial virus Ophiostoma novo-ulmi mitovirus 3a (OMV3a). In this study, colonization and lesion production by S. homoeocarpa on nonwounded (NW) and wounded (W) leaves of creeping bentgrass were characterized using light microscopy. On NW leaves, hyphae initially infected the leaf by forming appressoria along cell walls and over stomates by 48 h. Inter- and intracellular hyphae were not common until the NW leaves were heavily colonized at 96 h. Mycelia grew ahead of the lesion for 50 h on both NW and W leaves. On W leaves, mycelia grew directly into and infected wound sites as soon as 8 h, and inter- and intracellular hyphae rapidly developed into a primary infection front. At 16 h, secondary infections developed from superficial mycelia that formed appressoria along cell walls and over stomates. Appressoria gave rise to infection hyphae, spherical infection vesicles, and primary intracellular hyphae. Hypovirulent isolates seldom colonized NW or W leaves past 25 mm after 240 or 168 h, respectively. These results indicate that S. homoeocarpa is a hemibiotroph which colonizes and causes disease more rapidly on W than NW grass; an important factor for turf grass management. The etiology of virulent and hypovirulent isolates were similar, except for slower progression of hypovirulent colonization and disease." |
Language: | English |
References: | 0 |
Note: | This item is an abstract only! "2009 APS Annual Meeting" |
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete): Orshinsky, A. M., and G. J. Boland. 2009. Colonization of nonwounded and wounded creeping bentgrass (Agrostis stolonifera) by virulent and hypovirulent isolates of Sclerotinia homoeocarpa. Phytopathology. 99(6):p. S97-S98. |
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| DOI: 10.1094/PHYTO.2009.99.6.S1 |
| Web URL(s): http://apsjournals.apsnet.org/doi/pdf/10.1094/PHYTO.2009.99.6.S1#page=97 Last checked: 06/11/2009 Requires: PDF Reader Notes: Item is within a single large file |
| MSU catalog number: b2219736a |
| Find from within TIC: Digitally in TIC by file name: phytp2009junpres |
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