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Alternaria capsicicola sp. nov., a new species causing leaf spot of pepper (Capsicum annuum) in Malaysia |
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| Authors: | Abbas Nasehi Jugah Bin Kadir Farnaz Abed Ashtiani Mehdi Nasr-Esfahani Mui Yun Wong Siti Khadijah Rambe Hajar Ghadirian Farshid Mahmodi Elham Golkhandan |
| Institution: | 1. Department of Plant Protection, Faculty of Agriculture, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor Darul Ehsan, Malaysia 2. Isfahan Agricultural and Natural Resources Research Center, Plant Pests and Diseases Research Institute, Isfahan, Iran 3. Laboratory of Plantation Crops, Institute of Tropical Agriculture, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor Darul Ehsan, Malaysia 4. Laboratory of Biodiversity and Conservation Institute of Tropical Forestry and Forest Product (INTROP), Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor Darul Ehsan, Malaysia |
| Abstract: | 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. |
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