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Identification and Characterization of Alternaria iridiaustralis Causing Leaf Spot on Iris ensata in China.

ABSTRACT: 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.

SUBMITTER: Luo H 

PROVIDER: S-EPMC6023261 | biostudies-literature | 2018

REPOSITORIES: biostudies-literature

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Identification and Characterization of <i>Alternaria iridiaustralis</i> Causing Leaf Spot on <i>Iris ensata</i> in China.

Luo Huan H   Tao Ya Qun YQ   Fan Xiao Yan XY   Oh Sang Keun SK   Lu Hong Xue HX   Deng Jian Xin JX  

Mycobiology 20180423 2

In 2016, a severe leaf spot disease was found on <i>Iris ensata</i> Thumb. in Nanjing, China. The symptom was elliptical, fusiform, or irregularly necrotic lesion surrounded by a yellow halo, from which a small-spored <i>Alternaria</i> species was isolated. The fungus was identified as <i>Alternaria iridiaustralis</i> based on morphological characteristics. The pathogenicity tests revealed that the fungus was the causal pathogen of the disease. Phylogenic analyses using sequences of <i>ITS</i>,  ...[more]

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