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Abstract <p>Plants ensure resistance to negative environmental factors through various systems. One such system is a symbiotic relationship between a plant and endophytic fungi, specifically, <i>Arbuscular endomycorrhiza.</i> The xerophytic plants <i>Krascheninnikovia ceratodes</i> (L.) Gueldenst., <i>Haloxylon aphyllum</i> (Minkw.) Iljin, and <i>Tamarix ramosissima</i> Ledeb are used in Southern Russia to combat desertification and restore degraded lands. In this regard, the aim of this work was to determine the species diversity of endophytic fungi in the plants studied. The degree of mycorrhization and the abundance of arbuscules were assessed using the Trouvelot method (Trouvelot et al., 1986). Endophytes were identified by sequencing the internal transcribed spacer (ITS) region of their DNA using Oxford Nanopore technology. The research results have shown that the root system of <i>K. ceratodes</i> is mycorrhizated by two genera of fungi, i.e., <i>Monosporascus</i> Pollack &amp; Uecker and <i>Fusarium</i> Link, which may form arbuscule-like structures creating a symbiotic, mutualistic relationship. Members of the genera <i>Fusarium</i> and <i>Simplicillium</i> (J.F.H. Beyma) Zare &amp; W. were found in <i>H. aphyllum</i> and <i>T. ramosissima</i>. The intensity of mycorrhization in the root system of <i>K. ceratodes</i> was two times higher compared to other species studied. Herein, the abundance of arbuscules in the root system of <i>K. ceratodes</i> reached a maximum value, which was 17 times higher than that of <i>T. ramosissima</i> and 34 times that of <i>H. aphyllum</i>. It is assumed that these members of endophytic fungi form mutualistic relationships with plants to help them resist drought.</p>

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The Species Diversity of Endophytic Fungi in Xerophytes Growing on Dry Territories of Southern Russia

  • 期刊论文

  • 发表日期：

    2025年12月1日

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  • P. A. Kuzmin,
  • P. A. Krylov,
  • V. O. Malov

摘要

Abstract

Plants ensure resistance to negative environmental factors through various systems. One such system is a symbiotic relationship between a plant and endophytic fungi, specifically, Arbuscular endomycorrhiza. The xerophytic plants Krascheninnikovia ceratodes (L.) Gueldenst., Haloxylon aphyllum (Minkw.) Iljin, and Tamarix ramosissima Ledeb are used in Southern Russia to combat desertification and restore degraded lands. In this regard, the aim of this work was to determine the species diversity of endophytic fungi in the plants studied. The degree of mycorrhization and the abundance of arbuscules were assessed using the Trouvelot method (Trouvelot et al., 1986). Endophytes were identified by sequencing the internal transcribed spacer (ITS) region of their DNA using Oxford Nanopore technology. The research results have shown that the root system of K. ceratodes is mycorrhizated by two genera of fungi, i.e., Monosporascus Pollack & Uecker and Fusarium Link, which may form arbuscule-like structures creating a symbiotic, mutualistic relationship. Members of the genera Fusarium and Simplicillium (J.F.H. Beyma) Zare & W. were found in H. aphyllum and T. ramosissima. The intensity of mycorrhization in the root system of K. ceratodes was two times higher compared to other species studied. Herein, the abundance of arbuscules in the root system of K. ceratodes reached a maximum value, which was 17 times higher than that of T. ramosissima and 34 times that of H. aphyllum. It is assumed that these members of endophytic fungi form mutualistic relationships with plants to help them resist drought.