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- Title
Lack of antagonism between the biocontrol agent <em>Gliocladium virens</em> and vesicular arbuscular mycorrhizal fungi.
- Authors
Paulitz, T. C.; Linderman, R. G.
- Abstract
The effect of a fungal biocontrol agent <em>Gliocladium virens</em> Miller, Giddens & Foster on the colonization of cucumber by the VA mycorrhizal fungi <em>Glomus etunicatum</em> Becker & Gerdemann and <em>Glomus mosseae</em> (Nicol, & Gerd.) Gerdemann & Trappe was investigated. Inoculum of <em>G. virens</em>, grown on wheat bran or peatmoss-Czapek substrate, was added to soil artificially infested with <em>Pythium ultimum</em> Trow. Both damping-off cucumber and pathogen population density were reduced in treatments with <em>G. virens</em>, was also added to soils containing increasing propagule densities of <em>Glomus etunicatum</em> or Glomus mosseae. After one week of incubation, the soils were planted with cucumber seeds and the percent mycorrhizal colonization of roots was determined after 12 d. When grown on wheat bran, <em>G. virens</em> was phytotoxie and increased mycorrhizal colonization by <em>Glomus etunicatum</em>. However, <em>G. virens</em> had no effect on <em>Glomus etunicatum</em> when added as peatmoss-Czapek inculum. Amendment of soil with peatmoss-Czapek inculum of G. virens reduced colonization by Glomus mosseae when compare to a non-amended contro. Inculum colonized by other fungal biocontrol agents and sterilized with propylene oxide gave a similar reduction, suggesting that the substrate, not <em>G. virens</em>, was responsible for the reduction in VA mycorrhizal colonization. his evidence suggests that the fungal biocontrol agent <em>G. virens</em> does not have a deterimental impact on these VA mycorrhizal fungi, and would be compatible if applied as a dual-inoculum.
- Subjects
ENDOGONACEAE; GLIOCLADIUM; SOIL fungi; MYCOLOGY; PYTHIUM ultimum; SEED pods
- Publication
New Phytologist, 1991, Vol 117, Issue 2, p303
- ISSN
0028-646X
- Publication type
Article
- DOI
10.1111/j.1469-8137.1991.tb04911.x