Puccinia coronata var. coronata, a Crown Rust Pathogen of Two Highly Invasive Species, Is Detected Across the Midwest and Northeastern United States

Nicholas Greatens, Nick Klejeski, Les J. Szabo, Yue Jin, Pablo D. Olivera

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Puccinia coronata var. coronata (Pcc) causes crown rust disease of glossy buckthorn (Frangula alnus) and reed canarygrass (Phalaris arundinacea), two highly invasive plant species in North America. Pcc is closely related to major pathogens of cereals, turfgrasses, and forage grasses. It occurs throughout Europe but was first recorded in North America in 2013. Where its hosts co-occur, such as in wetlands in the Twin Cities metro area in Minnesota, we have observed Pcc causing significant infection that results in defoliation and fruit loss in glossy buckthorns and premature leaf senescence in reed canarygrass. In this research, we mapped the distribution of this likely recently introduced rust fungus and provided a description of disease signs and symptoms and pathogen morphology. Samples were acquired by two primary means: by surveys in Minnesota and by correspondence with users of iNaturalist.org, a social network for nature enthusiasts and community scientists. With an Oxford Nanopore MinION, we sequenced two to four loci from 22 samples across 13 states and identified samples by phylogenetic analysis and sequence similarity. Notably, four pure isolates appear to have intragenomic variation of the ITS region. We found that Pcc is present throughout the range of glossy buckthorn in the eastern United States. In Minnesota, Pcc is not common outside the range of glossy buckthorn despite the presence of susceptible grass hosts.

Original languageEnglish (US)
Pages (from-to)2009-2016
Number of pages8
JournalPlant disease
Volume107
Issue number7
DOIs
StatePublished - Jul 2023

Bibliographical note

Publisher Copyright:
© 2023 The American Phytopathological Society.

Keywords

  • epidemiology
  • etiology
  • pathogen detection

PubMed: MeSH publication types

  • Journal Article

Fingerprint

Dive into the research topics of 'Puccinia coronata var. coronata, a Crown Rust Pathogen of Two Highly Invasive Species, Is Detected Across the Midwest and Northeastern United States'. Together they form a unique fingerprint.

Cite this