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Alternaria capsicicola sp. nov., a new species causing leaf spot of pepper (Capsicum annuum) in Malaysia

Nasehi, Abbas, Kadir, Jugah Bin, Abed Ashtiani, Farnaz, Nasr-Esfahani, Mehdi, Wong, Mui Yun, Rambe, Siti Khadijah, Ghadirian, Hajar, Mahmodi, Farshid, Golkhandan, Elham
Mycological progress 2014 v.13 no.4 pp. 1041-1048
Alternaria, Capsicum annuum, calmodulin, conidia, data collection, fungi, genes, glyceraldehyde-3-phosphate dehydrogenase, highlands, leaf spot, new species, pathogenicity, pepper, phylogeny, tomatoes, Malaysia
A new species of Alternaria causing leaf spot of pepper (Capsicum annuum) obtained from the Cameron highlands, Pahang, Malaysia, was determined based on phylogenetic analyses, morphological characteristics, and pathogenicity assays. Phylogenetic analyses of combined dataset of the glyceraldehyde-3-phosphate dehydrogenase (gpd), Alternaria allergen a 1 (Alt a1) and calmodulin genes revealed that the new isolates clustered into a subclade distinct from the closely related Alternaria species A. tomato and A. burnsii. The solitary or short chains of conidia resemble those of A. burnsii. However, conidia with long beaks are morphologically similar to A. tomato. Hence, the pathogenic fungus is proposed as Alternaria capsicicola sp. nov. Pathogenicity assays indicated that A. capsicicola causes leaf spot on pepper.