Phylogenetic analysis of the synnema-producing genus Synnemapestaloides

Kyoko Watanabe, Mao Sekiguchi, Toyozo Sato, Tom Hsiang, Shigeru Kaneko, Kazuaki Tanaka, Masaru Kanda, Naoko Fujita, Shunsuke Nozawa

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


Synnemapestaloides rhododendri, the type species of the genus Synnemapestaloides, is a pathogen of Rhododendron brachycarpum. This fungus produces six-celled conidia with appendages at both end cells, and are generated by annellidic conidiogenous cells on the synnema. These conidial structures are similar to those of the genus Pestalotia. The monotypic genus Synnemapestaloides is currently classified in the family Amphisphaeriaceae solely based on conidial morphology. Here we demonstrate that Synnemapestaloides represents a distinct genus in the family Sporocadaceae (Amphisphaeriales) based on differences in the nucleotide sequences of the partial large subunit rDNA gene, the rDNA internal transcribed spacer, and the partial β-tubulin. The genus most closely related to Synnemapestaloides is Seimatosporium and the species most similar to Synnemapestaloides rhododendri is Seim. foliicola which produces short synnema-like conidiomata (sporodochia). These results demonstrate that Seim. foliicola should be transferred to Synnemapestaloides, and also demonstrate that Sporocadaceae can have synnematal in addition to pycnidial and acervular conidiomata.

Original languageEnglish
Article number28
JournalJournal of Fungi
Issue number4
Publication statusPublished - Dec 2016
Externally publishedYes


  • Amphisphaeriales
  • Conidiomatal development
  • Sporocadaceae
  • Synnemapestaloides

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Plant Science
  • Microbiology (medical)


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