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Interactions between Trichoderma pseudokoningii strains and the arbuscular mycorrhizal fungi Glomus mosseae and Gigaspora rosea

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Abstract

The interaction between Trichoderma pseudokoningii (Rifai) 511, 2212, 741A, 741B and 453 and the arbuscular mycorrhizal fungi Glomus mosseae (Nicol. & Gerd.) Gerdemann & Trappe BEG12 and Gigaspora rosea Nicolson & Schenck BEG9 were studied in vitro and in greenhouse experiments. All T. pseudokoningii strains inhibited the germination of G. mosseae and Gi. rosea except the strain 453, which did not affect the germination of Gi. rosea. Soluble exudates and volatile substances produced by all T. pseudokoningii strains inhibited the spore germination of G. mosseae. The germination of Gi. rosea spores was inhibited by the soluble exudates produced by T. pseudokoningii 2212 and 511, whereas T. pseudokoningii 714A and 714B inhibited the germination of Gi. rosea spores by the production of volatile substances. The strains of T. pseudokoningii did not affect dry matter and percentage of root length colonization of soybean inoculated with G. mosseae, except T. pseudokoningii 2212, which inhibited both parameters. However, all T. pseudokoningii strains decreased the shoot dry matter and the percentage of AM root length colonization of soybean inoculated with Gi. rosea. The saprotrophic fungi tested seem to affect AM colonization of root by effects on the presymbiotic phase of the AM fungi. No influence of AM fungi on the number of CFUs of T. pseudokoningii was found. The effect of saprotrophic fungi on AM fungal development and function varied with the strain of the saprotrophic species tested.

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Authors and Affiliations

  1. Dept. Ciencias Biológicas, 4º II Pabellón, Universidad de Buenos Aires, 1428 , Buenos Aires, Argentina

    Alicia Martinez & Alicia Godeas

  2. Programa de Investigación en Interacciones Biológicas, Centro de Estudios e Investigaciones y Departamento de Ciencia y Tecnología, Universidad Nacional de Quilmes, Roque Sáenz Peña 180, (B1876BXD) , Bernal, Provincia de Buenos Aires, Argentina

    Mariana Obertello & Alejandro Pardo

  3. Dept. Microbiología, Estación Experimental del Zaidín, C.S.I.C., Prof. Albareda 1, 18008 , Granada, Spain

    Juan A. Ocampo

Authors
  1. Alicia Martinez
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  2. Mariana Obertello
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  3. Alejandro Pardo
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  4. Juan A. Ocampo
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  5. Alicia Godeas
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Correspondence to Juan A. Ocampo.

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Martinez, A., Obertello, M., Pardo, A. et al. Interactions between Trichoderma pseudokoningii strains and the arbuscular mycorrhizal fungi Glomus mosseae and Gigaspora rosea . Mycorrhiza 14, 79–84 (2004). https://doi.org/10.1007/s00572-003-0240-y

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