Taxonomy of the Golovinomyces cynoglossi complex (Erysiphales, Ascomycota) disentangled by phylogenetic analyses and reassessments of morphological traits

Uwe Braun, Michael Bradshaw, Ting Ting Zhao, Sung Eun Cho, Hyeon Dong Shin

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The name Golovinomyces cynoglossi s. lat. is traditionally applied to a complex of morphologically similar powdery mildews on hosts of the plant family Boraginaceae. The current species-level taxonomy within this complex is ambiguous due to the lack of phylogenetic examinations. The present study applied phylogenetic methods to clarify the taxonomy of G. cynoglossi s. lat. Phylogenetic analysis of rDNA ITS sequences retrieved from Asian, European and North American specimens revealed that G. cynoglossi s. lat. collections from different hosts involved several species in five clearly separated lineages. Clade I consists primarily of Golovinomyces cynoglossi s. str. on Cynoglossum. Clade III consists of Golovinomyces sequences retrieved from the host genera Symphytum and Pulmonaria. The taxa within clade III are now assigned to G. asperifoliorum comb. nov. Clade V encompasses G. cynoglossi s. lat. on the host genera Bothriospermum, Buglossoides, Echium, Myosotis, and Trigonotis. The taxa within clade V are now assigned to G. asperifolii comb. nov. The species concerned in this study were lecto- and epitypified to stabilize their nomenclature.

Original languageEnglish
Pages (from-to)192-204
Number of pages13
JournalMycobiology
Volume46
Issue number3
DOIs
Publication statusPublished - 2018

Keywords

  • Boraginaceae
  • Co-evolution
  • Erysiphaceae
  • Golovinomyces asperifolii
  • Golovinomyces asperifoliorum
  • RDNA ITS

ASJC Scopus subject areas

  • Microbiology
  • Infectious Diseases

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