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Abstract <p>The object of our study was pool of xylosaprotrophic fungi associated with crown and fresh debris of subsenile <i>Quercus robur</i> trees. We collected data on two main groups of higher fungi—Ascomycota and Basidiomycota (their saprotrophic representatives), observed in regions crossed by the sublatitudinal-submeridional transect (Tula Region, Kaluga Region, Smolensk Region, Pskov Region, Leningrad Region, St.&#xa0;Petersburg). We analyzed reports where species identification is beyond doubt, our own collections identified in the Komarov Botanical Institute of the Russian Academy of Sciences as well as the mycological herbarium of the BIN RAS (LE). In total, 178 species of xylotrophic fungi belonging to the divisions of Ascomycota (47 species) and Basidiomycota (131 species) were noted in association with <i>Q. robur</i> on the sublatitudinal-submeridional transect. The largest number in <i>Q. robur</i> fungal complex consist species with a circumglobal distribution pattern—they reach for 80 species (44.9% of the species composition). They are followed by bipolar species (48 species, 27.0% of the species composition), Holarctic species (27 species, 15.1% of the species composition), Euro-American species (14 species, 7.9% of the species composition), Eurasian species (5 species, 2.8% of the species composition) and European species (4 species, 2.2% of the species composition). Mature generative and subsenile <i>Q. robur</i> trees represent a rich set of econiches, and differentiation of the associated saprotrophic fungal complex in the ecological-trophic aspect is observed. Saprotrophs are characterized by varying degrees of necrotrophic activity, or the absence of one, their tissue confinement varies (bark, cambium, sapwood, heartwood and wood debris), and in relation to the tree they act either as pathogens, causing chronic rot of the trunk and necrosis of branches, or as mortmass destroyers. The crown of <i>Q. robur</i>, both within its optimum range and beyond, is associated with a complex of co-adapted species, which includes necrotrophic <i>Colpoma quercinum</i> and <i>Coryneum depressum</i>, saprotrophic <i>Vuilleminia comedens</i> causing branches necrosis, saprotrophic <i>Diatrypella quercina</i>, <i>Peniophora quercina</i> and <i>Hyphoderma setigerum</i> causing decomposition of still attached branches, ensuring the processes of crown cleaning.</p>

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Xylosapotrophic Fungi Associated with Quercus robur within the Northeastern Part of Its Range (Central and Northwestern Regions of Russia)

  • 期刊论文

  • 发表日期：

    2025年7月9日

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  • I. V. Zmitrovich,
  • A. B. Shishlyannikova

摘要

Abstract

The object of our study was pool of xylosaprotrophic fungi associated with crown and fresh debris of subsenile Quercus robur trees. We collected data on two main groups of higher fungi—Ascomycota and Basidiomycota (their saprotrophic representatives), observed in regions crossed by the sublatitudinal-submeridional transect (Tula Region, Kaluga Region, Smolensk Region, Pskov Region, Leningrad Region, St. Petersburg). We analyzed reports where species identification is beyond doubt, our own collections identified in the Komarov Botanical Institute of the Russian Academy of Sciences as well as the mycological herbarium of the BIN RAS (LE). In total, 178 species of xylotrophic fungi belonging to the divisions of Ascomycota (47 species) and Basidiomycota (131 species) were noted in association with Q. robur on the sublatitudinal-submeridional transect. The largest number in Q. robur fungal complex consist species with a circumglobal distribution pattern—they reach for 80 species (44.9% of the species composition). They are followed by bipolar species (48 species, 27.0% of the species composition), Holarctic species (27 species, 15.1% of the species composition), Euro-American species (14 species, 7.9% of the species composition), Eurasian species (5 species, 2.8% of the species composition) and European species (4 species, 2.2% of the species composition). Mature generative and subsenile Q. robur trees represent a rich set of econiches, and differentiation of the associated saprotrophic fungal complex in the ecological-trophic aspect is observed. Saprotrophs are characterized by varying degrees of necrotrophic activity, or the absence of one, their tissue confinement varies (bark, cambium, sapwood, heartwood and wood debris), and in relation to the tree they act either as pathogens, causing chronic rot of the trunk and necrosis of branches, or as mortmass destroyers. The crown of Q. robur, both within its optimum range and beyond, is associated with a complex of co-adapted species, which includes necrotrophic Colpoma quercinum and Coryneum depressum, saprotrophic Vuilleminia comedens causing branches necrosis, saprotrophic Diatrypella quercina, Peniophora quercina and Hyphoderma setigerum causing decomposition of still attached branches, ensuring the processes of crown cleaning.