Changes in oxidative enzyme activity during interspecific mycelial interactions involving the white-rot fungus Trametes versicolor |
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Authors: | Jennifer Hiscox Petr Baldrian Hilary J Rogers Lynne Boddy |
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Institution: | 1. Grupo de Investigación Producción, Estructura y Aplicación de Biomoléculas (PROBIOM), Escuela de Química, Facultad de Ciencias, Universidad Nacional de Colombia – Sede Medellín, Calle 59A No 63 – 20, Medellín, Colombia;2. Centre for Cytochrome P450 Biodiversity, Institute of Life Science, Medical School, Swansea University, Swansea SA2 8PP, Wales, UK;3. Departamento de Ciencias Agronómicas, Facultad de Ciencias Agrarias, Universidad Nacional de Colombia – Sede Medellín, Calle 59A No 63 – 20, Medellín, Colombia;1. Department of Microbiology, College of Life Science, Nankai University, Tianjin, PR China;2. Tianjin Institute of Animal Husbandry and Veterinary Research, Tianjin, PR China;2. CBS-KNAW Fungal Biodiversity Centre, Utrecht, The Netherlands |
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Abstract: | Interspecific fungal antagonism leads to biochemical changes in competing mycelia, including up-regulation of oxidative enzymes. Laccase, manganese peroxidase (MnP), manganese-repressed peroxidase (MRP) and lignin peroxidase (LiP) gene expression and enzyme activity were compared during agar interactions between Trametes versicolor and five other wood decay fungi resulting in a range of interaction outcomes from deadlock to replacement of one fungus by another. Increased laccase and Mn-oxidising activities were detected at all interaction zones, but there were few changes in activity in regions away from the interaction zone in T. versicolor mycelia compared to self-pairings. Whilst no LiP activity was detected in any pairing, low level LiP gene expression was detected. MnP activity was detected but not expression of MnP genes; instead, MRP could explain the observed activity. No relationship was found between extent of enzyme activity increase and interaction outcome. Similarities between patterns of gene expression and enzyme activity are discussed. |
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