Sizing up septoria

W. Quaedvlieg, G. J.M. Verkley, H. D. Shin, R. W. Barreto, A. C. Alfenas, W. J. Swart, J. Z. Groenewald, Pedro W. Crous

Research output: Contribution to journalArticlepeer-review

293 Citations (Scopus)

Abstract

Septoria represents a genus of plant pathogenic fungi with a wide geographic distribution, commonly associated with leaf spots and stem cankers of a broad range of plant hosts. A major aim of this study was to resolve the phylogenetic generic limits of Septoria, Stagonospora, and other related genera such as Sphaerulina, Phaeosphaeria and Phaeoseptoria using sequences of the the partial 28S nuclear ribosomal RNA and RPB2 genes of a large set of isolates. Based on these results Septoria is shown to be a distinct genus in the Mycosphaerellaceae, which has mycosphaerella-like sexual morphs. Several septoria-like species are now accommodated in Sphaerulina, a genus previously linked to this complex. Phaeosphaeria (based on P. oryzae) is shown to be congeneric with Phaeoseptoria (based on P. papayae), which is reduced to synonymy under the former. Depazea nodorum (causal agent of nodorum blotch of cereals) and Septoria avenae (causal agent of avenae blotch of barley and rye) are placed in a new genus, Parastagonospora, which is shown to be distinct from Stagonospora (based on S. paludosa) and Phaeosphaeria. Partial nucleotide sequence data for five gene loci, ITS, LSU, EF-1a, RPB2 and Btub were generated for all of these isolates. A total of 47 clades or genera were resolved, leading to the introduction of 14 new genera, 36 new species, and 19 new combinations.

Original languageEnglish
Pages (from-to)307-390
Number of pages84
JournalStudies in Mycology
Volume75
DOIs
Publication statusPublished - 2013 Jun
Externally publishedYes

Bibliographical note

Funding Information:
We thank the technical staff, Arien van Iperen (cultures), and Marjan Vermaas (photographic plates), for their invaluable assistance. The research leading to these results has received funding from the European Community’s Seventh Framework Program (FP7/2007-2013)/grant agreement no. 226482 (Project: QBOL – Development of a new diagnostic tool using DNA barcoding to identify quarantine organisms in support of plant health) by the European Commission under the theme “Development of new diagnostic methods in support of Plant Health policy” (no. KBBE-2008-1-4-01). Special thanks also go to Dr Ellen van Agtmaal who prepared the line drawings included in this paper from photomicrographs and published materials ( Sutton 1980 ) using Adobe Photoshop CS3.

Keywords

  • Capnodiales
  • Multi-Locus Sequence Typing (MLST)
  • Mycosphaerella
  • Mycosphaerellaceae
  • Phaeoseptoria
  • Phaeosphaeria
  • Phaeosphaeriaceae
  • Pleosporales
  • Septoria
  • Sphaerulina
  • Stagonospora
  • systematics.

ASJC Scopus subject areas

  • Agricultural and Biological Sciences (miscellaneous)

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