A reappraisal of families within the order Magnaporthales and description of new endophytic taxa associated with Poaceae plants in China

JW Feng, XY Chen, KY Chen, IS Druzhinina, H Voglmayr, PW Crous, CP Kubicek, CL Zhang

Research output: Contribution to journal/periodicalArticleScientificpeer-review

Abstract

The order Magnaporthales belongs to the class Sordariomycetes within the phylum Ascomycota. Through phylogenetic analyses based on the concatenated multi-locus sequence alignment, five families have been successively introduced within Magnaporthales. This order comprises a diverse array of plant-pathogenic and endophytic fungi, most of which are associated with monocotyledons. However, there has been a lack of systematic exploration of the phylogeny and taxonomy of endophytic Magnaporthales fungi. This study conducted comprehensive phylogenetic and phylogenomic analyses of Magnaporthales, incorporating a substantial number of newly isolated endophytic Magnaporthales taxa from Poaceae plants, one of the most diverse plant families globally. The multi-locus phylogenies revealed six well-supported main clades. One of these main clades, comprising Aquafiliformis, Muraeriata, and Plagiosphaera, was distinct from clusters comprising genera of Pyriculariaceae and Magnaporthaceae (excluding Aquafiliformis, Muraeriata, and Plagiosphaera). Phylogenomic analyses confirmed that the genus Aquafiliformis is sister to the cluster comprising genera of Pyriculariaceae and Magnaporthaceae (excluding Aquafiliformis). Consequently, we propose the introduction of a new family, Plagiosphaeraceae, to accommodate the genera Aquafiliformis, Muraeriata, and Plagiosphaera, in addition to the five previously defined families: Ceratosphaeriaceae, Pseudohalonectriaceae, Ophioceraceae, Pyriculariaceae, and Magnaporthaceae. Furthermore, the phylogenetic analysis of Magnaporthales unveiled significant endophytic taxonomic novelties associated with Poaceae plants in China, leading to the proposal of 11 new genera, and 24 new species within Ophioceraceae, Pyriculariaceae, and Magnaporthaceae. Additionally, two named species within Pyriculariaceae and Magnaporthaceae are transferred to two new genera and combinations. The previously invalid genus Falciphora and its type species, Falciphora oryzae, are also validated.
Original languageEnglish
Pages (from-to)6240-6346
Number of pages107
JournalMycosphere
Volume15
Issue number1
DOIs
Publication statusPublished - 27 Nov 2024

Keywords

  • 42 new taxa
  • endophytic fungi
  • phylogenomics
  • phylogeny
  • Plagiosphaeraceae

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