Three Alternaria Species, Including a New Species, Causing Leaf Spot Disease of Loquat (Eriobotrya japonica) in China

Loquat (Eriobotrya japonica) is an economically important subtropical fruit crop in China. Field surveys conducted in different loquat orchards located in Chongqing, Sichuan, and Fujian provinces between 2017 and 2020 resulted in a collection of 56 Alternaria-like isolates from trees exhibiting symp...

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Veröffentlicht in:Plant disease. - 1997. - 108(2024), 8 vom: 04. Aug., Seite 2354-2366
1. Verfasser: Yan, Shuang (VerfasserIn)
Weitere Verfasser: Yu, Peng, Liang, Guolu, Zhang, Danhua, Timko, Michael P, Guo, Qigao, Wu, Di
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2024
Zugriff auf das übergeordnete Werk:Plant disease
Schlagworte:Journal Article Alternaria leaf spot pathogenicity tests phylogenetic analysis taxonomy
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520 |a Loquat (Eriobotrya japonica) is an economically important subtropical fruit crop in China. Field surveys conducted in different loquat orchards located in Chongqing, Sichuan, and Fujian provinces between 2017 and 2020 resulted in a collection of 56 Alternaria-like isolates from trees exhibiting symptoms of loquat leaf spot. Multigene phylogenetic analyses using seven gene regions, namely, ITS, gapdh, RPB2, tef1, Alt a 1, endoPG, and OPA10-2, showed that all the isolates belonged to the genus Alternaria, and supporting morphological analysis identified them as members of species A. alternata, A. gaisen, and A. chongqingensis sp. nov. In vitro and in vivo pathogenicity tests showed all the identified species to be pathogenic and able to cause leaf spot disease on loquat. Moreover, comprehensive phylogenetic analyses employing all combinations of the above seven gene sequences revealed the capability of Alt a 1-tef1-endoPG to provide a well-resolved gene tree for Alternaria spp. at the species level. This study adds to the current knowledge on an unknown species (A. chongqingensis sp. nov.) and is the first report of A. gaisen in loquat worldwide 
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650 4 |a Alternaria leaf spot 
650 4 |a pathogenicity tests 
650 4 |a phylogenetic analysis 
650 4 |a taxonomy 
700 1 |a Yu, Peng  |e verfasserin  |4 aut 
700 1 |a Liang, Guolu  |e verfasserin  |4 aut 
700 1 |a Zhang, Danhua  |e verfasserin  |4 aut 
700 1 |a Timko, Michael P  |e verfasserin  |4 aut 
700 1 |a Guo, Qigao  |e verfasserin  |4 aut 
700 1 |a Wu, Di  |e verfasserin  |4 aut 
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