Abstract
Helictotrichon sempervirens (blue oatgrass) is a perennial grass widely grown for ornamental use in Canada. Rusted blue oatgrass plants with diseased leaves covered with uredinia were collected from two locations at metropolitan Vancouver, British Columbia (BC), in summer 2022. The rust fungus was identified as Puccinia gibberosa (= P. coronata var. gibberosa) based on combined results of morphological characteristics and molecular analyses. The internal transcribed spacer two (ITS2) and partial large subunit ribosomal DNA were amplified and sequenced. The sequence obtained for the rust fungus showed 99.9% identity with the previously reported P. coronata var. gibberosa from USA. This is the first report of rust caused by P. gibberosa on blue oatgrass in Canada. Evidence from phylogenetic analyses supports the recognition of this rust at the species level. A revised description for P. gibberosa is provided, including synonyms, host range and distribution across the globe, and incorporating comprehensive molecular and morphological results for several North American and European specimens. In addition, a lectotype and an epitype are designated here for the rust species.
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Claims 3
Claim · model-written summary
Puccinia gibberosa was reported for the first time causing rust on blue oatgrass in Canada.
- Taxon
- Helictotrichon sempervirens
Helictotrichon sempervirense0 - Interactor
- P. gibberosa
Puccinia gibberosae1pathogen - Outcome
- first report of ruste1
- Setting
- Canadae1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Helictotrichon sempervirens (blue oatgrass) is a perennial grass widely grown for ornamental use in Canada”
e1“This is the first report of rust caused by P. gibberosa on blue oatgrass in Canada”
Claim · model-written summary
The rust on blue oatgrass had 99.9% ITS2 sequence identity with P. coronata var. gibberosa from the USA.
- Taxon
- Helictotrichon sempervirensHelictotrichon sempervirense0
- Interactor
- rust funguse2pathogen
- Outcome
- identitye2
- Value
- 99.9%e2
- Comparator
- P. coronata var. gibberosa from USAe2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Helictotrichon sempervirens (blue oatgrass) is a perennial grass widely grown for ornamental use in Canada”
e2“The sequence obtained for the rust fungus showed 99.9% identity with the previously reported P. coronata var. gibberosa from USA”
Claim · model-written summary
Phylogenetic analyses support recognising the rust at the species level.
- Taxon
- Helictotrichon sempervirensHelictotrichon sempervirense0
- Interactor
- ruste3pathogen
- Outcome
- recognition of this rust at the species levele3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Helictotrichon sempervirens (blue oatgrass) is a perennial grass widely grown for ornamental use in Canada”
e3“Evidence from phylogenetic analyses supports the recognition of this rust at the species level”