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    Characterisation of the interaction of Pseudomonas putida and Pseudomonas tolaasii with Trichoderma aggressivum

    Kosanovic, Dejana and Sheehan, Gerard and Grogan, Helen and Kavanagh, Kevin (2019) Characterisation of the interaction of Pseudomonas putida and Pseudomonas tolaasii with Trichoderma aggressivum. European Journal of Plant Pathology, 156 (1). pp. 111-121. ISSN 1573-8469

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    Green mould disease is caused by Trichoderma aggressivum which colonizes mushroom compost and reduces yield. Two Pseudomonas species are associated with mushroom compost: Pseudomonas putida, which stimulates mushroom pinning, and Pseudomonas tolaasii which has a negative effect on crop production. The aim of this work was to characterize T. aggressivum – Pseudomonas interactions as these may be important factors in the development of green mould disease. P. tolaasii supernatant inhibited growth by 57% but P. putida stimulated growth of T.aggressivum by 44%. Tolaasin production was identified in P. tolaasii cultures with a peak at 96 h. Fluorescent microscopy examination of T. aggressivum hyphae revealed that exposure to P. tolaasii supernatant decreased mycelial formation while increasing the abundance of conidia. Label free proteomic analysis of changes in the abundance of T. aggressivum proteins indicated that exposure to P. tolaasii supernatant lead to an oxidative stress response and catabolic enzyme activation (mitochondrial import inner membrane translocase complex (5.7-fold), oxidoreductase (5.2-fold), glucoamylase (5.1-fold)). Exposure of T. aggressivum to P. putida supernatant lead to an increase in the abundance of proteins associated with growth and development (structural constituents of ribosome (20-fold), H/ACA ribonucleoprotein complex subunit (18-fold), DNA binding and nucleosome assembly protein (5.3-fold), and prefoldin (5-fold)). These results indicate that exposure to P. putida can stimulate the growth of T. aggressivum and this interaction may be an important factor in increasing green mould disease in mushroom crops and so reducing yield.

    Item Type: Article
    Keywords: Agaricus; Trichoderma; Proteomics; Pseudomonas;
    Academic Unit: Faculty of Science and Engineering > Biology
    Item ID: 14913
    Identification Number:
    Depositing User: Dr. Kevin Kavanagh
    Date Deposited: 11 Oct 2021 13:49
    Journal or Publication Title: European Journal of Plant Pathology
    Publisher: Springer
    Refereed: Yes
    Use Licence: This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here

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