Abstract
Abstract Daylily rust, caused by P uccinia hemerocallidis , has been present in the U nited S tates since 2000. In 2003, inoculations with a single isolate of P . hemerocallidis identified daylily cultivars with high levels of resistance to the fungus. The present study was carried out to determine if pathotypes of P . hemerocallidis are present in the south eastern U nited S tates. Sixteen isolates of P . hemerocallidis were each inoculated onto leaf segments from 19 daylily cultivars and the resulting disease phenotype assessed. A significant effect of rust isolate on host reaction phenotype was observed for nine of the 19 daylily cultivars. Five of the nine cultivars displayed reaction phenotypes with different isolates of P . hemerocallidis that included at least one susceptible or moderately susceptible and also resistant phenotypes. These results indicate that different pathotypes of the fungus are present in the south east U nited S tates. Daylily hybridizers interested in screening for host resistance to P . hemerocallidis will need to include multiple isolates of the fungus to allow for this host specialization.
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Claims 4
Claim · model-written summary
Rust isolate significantly affected host reaction phenotype in nine of 19 daylily cultivars.
- Taxon
- daylily
_v2.jpg?width=60)
Hemerocallis hybrid cultivare0 - Interactor
- rust isolatee0pathogen
- Outcome
- host reaction phenotypee0
- Value
- nine of the 19e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_v2.jpg?width=500)
Verbatim
e0“A significant effect of rust isolate on host reaction phenotype was observed for nine of the 19 daylily cultivars.”
Claim · model-written summary
Five cultivars showed both susceptible and resistant phenotypes across isolates.
- Taxon
- daylilyHemerocallis hybrid cultivart0
- Interactor
- P . hemerocallidis
Puccinia hemerocallidise0pathogen - Outcome
- reaction phenotypese0
- Value
- Five of the ninee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Five of the nine cultivars displayed reaction phenotypes with different isolates of P . hemerocallidis that included at least one susceptible or moderately susceptible and also resistant phenotypes.”
t0“Daylily”
Claim · model-written summary
Different fungal pathotypes occur in the southeastern United States.
- Taxon
- DaylilyHemerocallis hybrid cultivart0
- Interactor
- Puccinia hemerocallidisPuccinia hemerocallidist0pathogen
- Outcome
- different pathotypes of the funguse0
- Setting
- south east U nited S tatese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These results indicate that different pathotypes of the fungus are present in the south east U nited S tates.”
t0“Daylily Rust Pathogen Puccinia hemerocallidis”
Claim · model-written summary
Hybridizers should screen daylily resistance with multiple fungal isolates.
- Taxon
- DaylilyHemerocallis hybrid cultivare0
- Interactor
- P . hemerocallidisPuccinia hemerocallidise0pathogen
- Outcome
- include multiple isolates of the funguse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Daylily hybridizers interested in screening for host resistance to P . hemerocallidis will need to include multiple isolates of the fungus to allow for this host specialization.”