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<p><i>Trichoderma</i> species are widely distributed soil fungi known for their biocontrol potential and plant growth-promoting properties. However, the diversity of <i>Trichoderma</i> in island ecosystems, such as the Canary Islands, remains underexplored. In this study, we describe <i>Trichoderma ichasaguae</i> sp. nov., a novel species isolated from banana rhizosphere soils in southwestern Tenerife (the island with the largest cultivated area in the Canary archipelago). The species was identified through multilocus phylogenetic analyses (ITS, <i>tef1-α</i>,<i> rpb2</i>) and detailed morphological characterization. Phylogenetic analyses revealed that <i>Trichoderma ichasaguae</i> forms a distinct lineage within the <i>Harzianum</i> section, closely related to <i>T. hortense</i>, <i>T. rugulosum</i>, and <i>T. orarium</i>, but with clear genetic and morphological differentiation. The description of <i>Trichoderma ichasaguae</i> expands our understanding of fungal biodiversity in the Canary Islands and underscores the need for further taxonomic studies in these insular ecosystems.</p>

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Trichoderma ichasaguae sp. nov., Isolated from Banana Rhizosphere Soils in Tenerife (Canary Islands, Spain)

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年1月23日

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  • Raquel Correa-Delgado,
  • Federico Laich

摘要

Trichoderma species are widely distributed soil fungi known for their biocontrol potential and plant growth-promoting properties. However, the diversity of Trichoderma in island ecosystems, such as the Canary Islands, remains underexplored. In this study, we describe Trichoderma ichasaguae sp. nov., a novel species isolated from banana rhizosphere soils in southwestern Tenerife (the island with the largest cultivated area in the Canary archipelago). The species was identified through multilocus phylogenetic analyses (ITS, tef1-α, rpb2) and detailed morphological characterization. Phylogenetic analyses revealed that Trichoderma ichasaguae forms a distinct lineage within the Harzianum section, closely related to T. hortense, T. rugulosum, and T. orarium, but with clear genetic and morphological differentiation. The description of Trichoderma ichasaguae expands our understanding of fungal biodiversity in the Canary Islands and underscores the need for further taxonomic studies in these insular ecosystems.