First Report of <i>Cucumber mosaic virus</i> on <i>Iris tectorum</i> in China

Lu, Xiuyun; Tang, Wei; Xu, Xiu-Xiu; Sun, Hangjun; Li, F.; Gao, Rui; Yang, Shifa

doi:10.1094/pdis-01-16-0083-pdn

Cited by 2 publications

(1 citation statement)

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“…During the cultivation of Iris spp., the plants suffer from various diseases induced by fungal, bacterial, viral, and nematode pathogens (Umesha et al, 2010;Lu et al, 2016;Wang et al, 2020;Wang et al, 2022). Pathogenic fungal species have been commonly found in connection with the genera of Alternaria, Botrytis, Colletotrichum, Fusarium, Harzia and Puccinia (Bobev, 2009;Liu et al, 2016;Schultes et al, 2017;Choi et al, 2019;Wang et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Alternaria species in section Alternaria associated with Iris plants in China

Gou

Aung²,

Htun³

et al. 2022

Front. Microbiol.

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Plants of the Iris genus have been widely cultivated because of their medicinal, ornamental, and economic values. It commonly suffers from Alternaria leaf spot or blight disease leading to considerable losses for their commercial values. During an investigation of 14 provinces or municipalities of China from 2014 to 2022, a total of 122 Alternaria strains in section Alternaria were obtained from diseased leaves of Iris spp.. Among them, 12 representative strains were selected and identified based on morphological characterization and multi-locus phylogenetic analysis, which encompassed the internal transcribed spacer of rDNA region (ITS), glyceraldehyde-3-phosphate dehydrogenase (GAPDH), translation elongation factor 1 alpha (TEF1), RNA polymerase second largest subunit (RPB2), Alternaria major allergen gene (Alt a 1), an anonymous gene region (OPA10-2), and endopolygalacturonase gene (EndoPG). The strains comprised two known species of A. alternata and A. iridicola, and two new species of A. setosae and A. tectorum, which were described and illustrated here. Their pathogenicity evaluated on Iris setosa indicated that all the strains could induce typical Alternaria leaf spot or blight symptoms. The results showed that the virulence was variable among those four species, from which A. tectorum sp. nov. was the most virulent one, followed by A. setosae sp. nov., A. iridicola and A. alternata.

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