Revision of the genus <i>Aciculosporium </i>(<i>Clavicipitaceae</i>) with a description of a new species on wavyleaf basketgrass, and proline-containing cyclic dipeptide production by <i>A. take</i>

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  • Tanaka Eiji
    Ishikawa Prefectural University
  • Hosoe Tomoo
    Department of Organic Chemistry, Hoshi University
  • Degawa Yousuke
    Mountain Science Center, Sugadaira Research Station, University of Tsukuba
  • Kolařík Miroslav
    Laboratory of Fungal Genetics and Metabolism, Institute of Microbiology of the Czech Academy of Sciences

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  • Revision of the genus Aciculosporium (Clavicipitaceae) with a description of a new species on wavyleaf basketgrass, and proline-containing cyclic dipeptide production by A. take

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Abstract

<p>The genus Aciculosporium (Clavicipitaceae, Hypocreales, Ascomycota)was established in 1908 for A. take, which is the causal fungus of witches’ broom of bamboo. Although the original description was valid at that time, a type specimen for A. take has not been designated. To standardize the use of this genus and species name, a neotypification and reference specimen of A. take are proposed. Multilocus phylogenetic analyses based on DNA sequences from 28S rDNA, TEF, Tub2, Mcm7, and RPB2 revealed that A.sasicola is from a different lineage to A. take, and other specimens from wavyleaf basket grass (Oplismenus undulatifolius) represent a distinct species proposed here as Aciculosporium oplismeni sp. nov. Chemical analysis using mass spectrometry and nuclear magnetic resonance spectroscopy showed that A. take produces four proline-containing cyclic dipeptides, which are moieties of ergot alkaloids. However, ergot alkaloids, lolines, peramine, indole-diterpenes, and lolitrem were not detected in the culture solvent. This study offers clarification of the lineage and morphology of this genus.</p>

Journal

  • Mycoscience

    Mycoscience 62 (3), 166-175, 2021-05-20

    The Mycological Society of Japan

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