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Alternaria brassicifolii sp. nov. Isolated from Brassica rapa subsp. pekinensis in Korea.


ABSTRACT: A new species belonging to the genus Alternaria was isolated from the necrotic leaf spots of Brassica rapa subsp. pekinensis in Yuseong district, Daejeon, Korea. It is an occasional isolate, not an etiological agent, which is morphologically similar to A. broccoli-italicae, but differs in conidial size and conidiophore shape. Phylogenetic analysis using the sequence datasets of the internal transcribed spacer (ITS) region of the rDNA, glyceraldehyde-3-phosphate dehydrogenase (gpd), and plasma membrane ATPase genes showed that it is distantly related to A. broccoli-italicae and closely related to Alternaria species in the section Pseudoalternaria, which belonged to a clade basal to the section Infectoriae. Morphologically, the species is unique because it produces solitary conidia or conidial chains (two units), unlike the four members in the section Pseudoalternaria that produce conidia as short branched chains. It exhibits weak pathogenicity in the host plant. This report includes the description and illustration of A. brassicifolii as a new species.

SUBMITTER: Deng JX 

PROVIDER: S-EPMC6023256 | biostudies-literature | 2018

REPOSITORIES: biostudies-literature

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<i>Alternaria brassicifolii</i> sp. nov. Isolated from <i>Brassica rapa</i> subsp. <i>pekinensis</i> in Korea.

Deng Jian Xin JX   Li Mei Jia MJ   Paul Narayan Chandra NC   Oo May Moe MM   Lee Hyang Burm HB   Oh Sang-Keun SK   Yu Seung Hun SH  

Mycobiology 20180521 2


A new species belonging to the genus <i>Alternaria</i> was isolated from the necrotic leaf spots of <i>Brassica rapa</i> subsp. <i>pekinensis</i> in Yuseong district, Daejeon, Korea. It is an occasional isolate, not an etiological agent, which is morphologically similar to <i>A. broccoli-italicae</i>, but differs in conidial size and conidiophore shape. Phylogenetic analysis using the sequence datasets of the internal transcribed spacer (ITS) region of the rDNA, glyceraldehyde-3-phosphate dehydr  ...[more]

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