Abstract
Alternaria cinerariae, an important and well-known plant pathogen of cineraria, has been delimited by its narrowly to broadly ellipsoid or ovoid conidia with blunt-tapered false beaks, but without descriptions of its morphological variability and host range. Leaf spot diseases have recently been found on asteraceous plants Pericallis cruenta, Farfugium japonicum, and Gynura bicolor in Japan, with A. cinerariae-like isolates subsequently obtained from the lesions. In this study, we identified these isolates as A. cinerariae using an integrated species criterion based on morphology, phylogeny, and pathogenicity, and examined their morphological variability. Although isolates exhibited morphological differences with respect to sporulation pattern, conidial swelling, and chlamydospore formation, phylogenetic analysis using gpd, rpb2, and tef1 sequences clustered them together in a single clade with a previously recognized A. cinerariae strain. Inoculation tests on 17 species, including five Senecioneae species, were performed to determine the experimental host range of A. cinerariae. The results suggest that A. cinerariae has considerable morphological variation and preferential pathogenicity to Senecioneae plants, and also indicate that G. bicolor should be added as a natural host of A. cinerariae.
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Claims 6
Claim · model-written summary
Leaf spot occurred on three named asteraceous plants.
- Taxon
- Pericallis cruenta
Pericallis cruentae0 - Interactor
- Alternaria cinerariaeAlternaria cinerariaet0pathogen
- Outcome
- Leaf spot diseasese0
- Setting
- Japane0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaf spot diseases have recently been found on asteraceous plants Pericallis cruenta, Farfugium japonicum, and Gynura bicolor in Japan”
t0“Alternaria cinerariae”
Claim · model-written summary
Isolates from lesions were identified as A. cinerariae.
- Taxon
- Pericallis cruentaPericallis cruentat0
- Interactor
- A. cinerariaeAlternaria cinerariaee0pathogen
- Outcome
- identified these isolates as A. cinerariaee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“we identified these isolates as A. cinerariae using an integrated species criterion based on morphology, phylogeny, and pathogenicity”
t0“asteraceous plants Pericallis cruenta, Farfugium japonicum, and Gynura bicolor”
Claim · model-written summary
The isolates differed in sporulation, conidial swelling and chlamydospore formation.
- Taxon
- cineraria
Pericallis hybridat0 - Interactor
- Alternaria cinerariaeAlternaria cinerariaet0pathogen
- Outcome
- morphological differences with respect to sporulation pattern, conidial swelling, and chlamydospore formatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“isolates exhibited morphological differences with respect to sporulation pattern, conidial swelling, and chlamydospore formation”
t0“Alternaria cinerariae”
Claim · model-written summary
The isolates formed one clade with an established A. cinerariae strain.
- Taxon
- cinerariaPericallis hybridat0
- Interactor
- A. cinerariaeAlternaria cinerariaee0pathogen
- Outcome
- single cladee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“phylogenetic analysis using gpd, rpb2, and tef1 sequences clustered them together in a single clade with a previously recognized A. cinerariae strain”
t0“Alternaria cinerariae”
Claim · model-written summary
A. cinerariae showed preferential pathogenicity to Senecioneae plants.
- Taxon
- Senecioneae plantsSenecioneaee0
- Interactor
- A. cinerariaeAlternaria cinerariaee0pathogen
- Outcome
- preferential pathogenicitye0
Verbatim
e0“A. cinerariae has considerable morphological variation and preferential pathogenicity to Senecioneae plants”
Claim · model-written summary
G. bicolor was identified as a natural host of A. cinerariae.
- Taxon
- G. bicolor
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Gynura bicolore0 - Interactor
- A. cinerariaeAlternaria cinerariaee0pathogen
- Outcome
- natural hoste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.png?width=500)
Verbatim
e0“G. bicolor should be added as a natural host of A. cinerariae.”