Combined effect of Zn2+ and Mn2+ on physiology of wood-rotting basidiomycetes. (1st May 2013)

• Record Type: Journal Article
• Authors: Ibáñez, C; Rabinovich, M; Soubes, M; Cecchetto, G; Cerdeiras, M
• Is Part Of: International wood products journal. Volume 4:Number 2(2013)
• Page Start: 81
• Page End: 88
• Publication Date: 2013-05-01
• Subjects: Wood -- Periodicals; Periodicals; 620.1205
• DOI: 10.1179/2042645312Y.0000000025
• Languages: English
• ISSNs: 2042-6445

Abstract

<abstract> <title> <x xml:space="preserve">Abstract</x> </title> <p>The effect of pure Zn²⁺ and combined Zn²⁺ and Mn²⁺ supplements on the growth and ligninolytic activity of wood-rotting basidiomycetes was studied. Based on measurements of minimum inhibitory concentration and minimum decolourisation-inhibiting concentration available from cultures of <italic>Inocutis sp.</italic>, <italic>Trametes versicolor</italic> and <italic>Gloeophyllum trabeum</italic>, and a comparison of such results with those obtained in previous work for <italic>P. chrysosporium</italic> and <italic>P. atropurpurascens</italic>, metal supplements were shown to inhibit fungal physiology at concentrations within the study range. Average minimum inhibitory concentration values were consistently lower for ZnSO₄ than for ZnSO₄/MnSO₄ (2 mM Zn²⁺), demonstrating the antagonistic effect of the tested cations. Furthermore, because the ligninolytic system of <italic>P. atropurpurascens</italic> had shown a high tolerance to metals, its ligninolytic and germinative behaviour was compared with that of <italic>P. chrysosporium</italic>. Conidial germination was inhibited at 1 mM of Zn²⁺ in the two strains, whereas extracellular activity was inhibited at concentrations above 2 mM.</p> </abstract>