Mycobiology.  2020 Jun;48(3):233-239. 10.1080/12298093.2020.1745476.

Morphology and Molecular Characterization of a Fungus from the Alternaria alternata Species Complex Causing Black Spots on Pyrus sinkiangensis (Koerle pear)

Affiliations
  • 1Department of Plant Protection, College of Agriculture, Yangtze University, Jingzhou, China
  • 2Forewarning and Management of Agricultural and Forestry Pests, Hubei Engineering Technology Center, Yangtze University, Jingzhou, China
  • 3General Station of Plant Protection of Hubei Province, Wuhan, China
  • 4Department of Applied Biology, College of Agriculture and Life Sciences, Chungnam National University, Daejeon, Korea

Abstract

A small-spored Alternaria was found from black spots of storaged Koerle pear (Pyrus sinkiangensis), one of the economically important fruit in Xinjiang province, China. The morphology is similar to A. limoniasperae but obviously different in secondary conidiophores and conidial septa. A phylogenetic analysis using sequence datasets of ITS, GAPDH, TEF1, RPB2, Alt a1, OPA10–2, and EndoPG genes revealed that it belonged to the Alternaria alternata complex group. Pathogenicity tests illustrated that the fungus was the causal pathogen of black spot on Koerle pear fruit.

Keyword

Alternaria; black spot disease; phylogenetic analysis; pathogenicity
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