Journal
MYCOBIOLOGY
Volume 46, Issue 2, Pages 168-171Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/12298093.2018.1454007
Keywords
Alternaria iridiaustralis; Iris ensata Thumb; morphology; pathogenicity; sequence analysis
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In 2016, a severe leaf spot disease was found on Iris ensata Thumb. in Nanjing, China. The symptom was elliptical, fusiform, or irregularly necrotic lesion surrounded by a yellow halo, from which a small-spored Alternaria species was isolated. The fungus was identified as Alternaria iridiaustralis based on morphological characteristics. The pathogenicity tests revealed that the fungus was the causal pathogen of the disease. Phylogenic analyses using sequences of ITS, gpd, endoPG, and RPB2 genes confirmed the morphological identification. This study is the first report of A. iridiaustralis causing leaf spots on I. ensata in China.
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