Mycobiology.  2019 Mar;47(1):66-75. 10.1080/12298093.2019.1575584.

Alternaria yunnanensis sp. nov., a New Alternaria Species Causing Foliage Spot of Rubber Tree in China

Affiliations
  • 1Research Centre of Plant Protection, Yunnan Institute of Tropical Crops, Jinghong, 666100, China.
  • 2State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China. liuxiaoyong@im.ac.cn

Abstract

A new species of Alternaria causing leaf spots on the rubber tree (Hevea brasiliensis) in Yunnan, China, was isolated, examined, and illustrated. Morphologically, it belongs to the section Porri of Alternaria, which produces relatively large conidia and a simple or branched, filamentous long beak. It is, however, characterized by conidiophores gradually enlarging near the apex into a clavate conidiogenous cell and long ellipsoid to obclavate, smooth-walled conidia with a long filamentous beak. Molecular phylogenetic analyses based on ITS rDNA, GAPDH, and TEF1-alpha sequences demonstrate that the phytopathogen falls in the clade of the section Porri, being most closely related to A. sidae, A. sennae, A. deseriticola, A. cyamopsidis, A. rostellata, A. nitrimali, A. crassa, and A. thunbergiae.

Keyword

Alternaria yunnanensis; Ascomycota; morphology; multi-loci molecular phylogeny; taxonomy

MeSH Terms

Acanthaceae
Accidental Falls
Alternaria*
Animals
Ascomycota
Beak
China*
Classification
DNA, Ribosomal
Hevea*
Rubber*
Spores, Fungal
DNA, Ribosomal
Rubber
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