Abstract
In 2011, a leaf blight disease was observed on cosmos (Cosmos bipinnatus) leaves in Nonsan, Korea. The causal pathogen was isolated and identified based on morphological and molecular approaches. Morphological characteristics of the pathogen matched well with the Alternaria cosmosa and also easily distinguishable from Alternaria zinniae reported from cosmos seeds by producing branched beak. Phylogenetically, the pathogen could not be distinguished from A. passiflorae based on the sequence analysis of a combined data set of Alt a1 and gpd genes. However, A. passiflorae was distinguished from the present species by having conidiophores with 4 to 5 conidiogenous loci. The results indicate that the present Alternaria species is A. cosmosa. Pathogenicity tests revealed that the isolate was pathogenic to the leaves of Cosmos bipinnatus. This is the first report of Alternaria blight disease caused by A. cosmosa on cosmos in Korea.
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Claims 7
Claim · model-written summary
Leaf blight was observed on cosmos leaves in Nonsan, Korea.
- Taxon
- Cosmos bipinnatus
Cosmos bipinnatuse0 - Organ / stage
- leavese0
- Outcome
- leaf blight diseasee0
- Setting
- Nonsan, Koreae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 2011, a leaf blight disease was observed on cosmos (Cosmos bipinnatus) leaves in Nonsan, Korea.”
Claim · model-written summary
Morphological and molecular evidence identified the leaf-blight isolate as A. cosmosa.
CosmosOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results indicate that the present Alternaria species is A. cosmosa.”
t0“Cosmos”
Claim · model-written summary
Morphology distinguished the isolate from Alternaria zinniae by a branched beak.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“easily distinguishable from Alternaria zinniae reported from cosmos seeds by producing branched beak.”
Claim · model-written summary
Combined Alt a1 and gpd sequences did not distinguish the isolate from A. passiflorae.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the pathogen could not be distinguished from A. passiflorae based on the sequence analysis of a combined data set of Alt a1 and gpd genes.”
t0“Cosmos”
Claim · model-written summary
A. passiflorae differed by conidiophores bearing four to five conidiogenous loci.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A. passiflorae was distinguished from the present species by having conidiophores with 4 to 5 conidiogenous loci.”
t0“Cosmos”
Claim · model-written summary
The isolate caused disease on Cosmos bipinnatus leaves in pathogenicity tests.
- Taxon
- Cosmos bipinnatusCosmos bipinnatuse0
- Treatment
- the isolatee0
- Interactor
- the isolatee0pathogen
- Outcome
- pathogenic to the leavese0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pathogenicity tests revealed that the isolate was pathogenic to the leaves of Cosmos bipinnatus.”
Claim · model-written summary
The study reports the first Korean occurrence of A. cosmosa leaf blight on cosmos.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This is the first report of Alternaria blight disease caused by A. cosmosa on cosmos in Korea.”