Abstract
The population structure of A lternaria species associated with potato foliar diseases in C hina has not been previously examined thoroughly. Between 2010 and 2013, a total of 511 A lternaria isolates were obtained from diseased potato leaves sampled in 16 provinces, autonomous regions or municipalities of China. Based on morphological traits and molecular characteristics, all the isolates were identified as A lternaria tenuissima , A . alternata or A . solani . Of the three species, A . tenuissima was the most prevalent (75·5%), followed by A . alternata (18·6%) and A . solani (5·9%). Phylogenetic analysis based on sequences of the internal transcribed spacer ( ITS ) region of ribosomal DNA (r DNA ) of representative A lternaria isolates showed that A . solani was distinct from the two small‐spored A lternaria species. Phylogenetic analysis of the partial coding sequence of the histone 3 gene divided the same collection of isolates into three main clades representing A . tenuissima , A . alternata and A . solani , respectively. The pathogenicity of the isolates on detached leaves of potato cv. F avorite did not differ significantly between the three species or between isolates from different geographical origins. The results indicate that the population structure of A lternaria species associated with potato foliar diseases differs from that reported previously in C hina. This is the first report of A . tenuissima causing potato foliar diseases in C hina.
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Claims 8
Claim · model-written summary
All 511 potato isolates were identified as three Alternaria species.
- Taxon
- potato
Solanum tuberosume0 - Interactor
- A lternariae0pathogen
- Outcome
- identified as A lternaria tenuissima , A . alternata or A . solanie1
- Value
- 511e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a total of 511 A lternaria isolates were obtained from diseased potato leaves”
e1“all the isolates were identified as A lternaria tenuissima , A . alternata or A . solani”
Claim · model-written summary
A. tenuissima was the most prevalent species at 75.5%.
- Taxon
- potatoSolanum tuberosumt0
- Interactor
- A . tenuissimae0pathogen
- Outcome
- most prevalente0
- Value
- 75·5%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A . tenuissima was the most prevalent (75·5%)”
t0“Characterization of A lternaria species associated with potato foliar diseases in C hina”
Claim · model-written summary
A. alternata comprised 18.6% of the isolates.
- Taxon
- potatoSolanum tuberosumt0
- Interactor
- A . alternatae0pathogen
- Outcome
- A . alternatae0
- Value
- 18·6%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A . alternata (18·6%)”
t0“Characterization of A lternaria species associated with potato foliar diseases in C hina”
Claim · model-written summary
A. solani comprised 5.9% of the isolates.
- Taxon
- potatoSolanum tuberosumt0
- Interactor
- A . solanie0pathogen
- Outcome
- A . solanie0
- Value
- 5·9%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A . solani (5·9%)”
t0“Characterization of A lternaria species associated with potato foliar diseases in C hina”
Claim · model-written summary
ITS phylogeny distinguished A. solani from the two small-spored species.
- Taxon
- potatoSolanum tuberosumt0
- Interactor
- A . solanie0pathogen
- Outcome
- distinct from the two small‐spored A lternaria speciese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phylogenetic analysis based on sequences of the internal transcribed spacer ( ITS ) region of ribosomal DNA (r DNA ) of representative A lternaria isolates showed that A . solani was distinct from the two small‐spored A lternaria species”
t0“Characterization of A lternaria species associated with potato foliar diseases in C hina”
Claim · model-written summary
Histone 3 sequences separated the isolates into three species clades.
- Taxon
- potatoSolanum tuberosumt0
- Gene
- histone 3 genee0
- Outcome
- three main cladese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phylogenetic analysis of the partial coding sequence of the histone 3 gene divided the same collection of isolates into three main clades representing A . tenuissima , A . alternata and A . solani , respectively”
t0“Characterization of A lternaria species associated with potato foliar diseases in C hina”
Claim · model-written summary
Pathogenicity on detached potato leaves did not significantly differ by Alternaria species or geographical origin.
- Taxon
- potatoSolanum tuberosume0
- Material
- F avoritee0
- Organ / stage
- detached leavese0
- Interactor
- isolatese0pathogen
- Outcome
- pathogenicitye0
- Direction
- did not differe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The pathogenicity of the isolates on detached leaves of potato cv. F avorite did not differ significantly between the three species or between isolates from different geographical origins”
Claim · model-written summary
The authors report A. tenuissima as a cause of potato foliar disease in China for the first time.
- Taxon
- potatoSolanum tuberosume0
- Interactor
- A . tenuissimae0pathogen
- Outcome
- potato foliar diseasese0
- Setting
- C hinae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This is the first report of A . tenuissima causing potato foliar diseases in C hina”