Identification of Curvularia spp. Isolated from Gramineous Plants in Korea

Yi, Jeong-Hye; Kim, Jin-Won; Lee, Du-Hyung; Shim, Gyu-Yul

doi:10.4489/kjm.2002.30.1.056

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(2 citation statements)

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“…Curvularia cymbopogonis is a common pathogen which also causes diseases of sugar-cane, rice, seedlings of itchgrass, Agrostis palustris Huds. and Dactylis glomerata L. (Santamaria et al 1971;Walker and White 1979;Olufolaji 1996;Yi et al 2002). A single strain named C. cymbopogonis (CBS 419.78) included in our analyses grouped distant from C. nanningensis but its reliability seems questionable and apparently belongs to a different species (Fig.…”

Section: Discussionmentioning

confidence: 89%

“…We further checked the original description of this species (Groves and Skolko 1945) and found that differences in conidial shape mainly resulted from conidial width (C. cymbopogonis: 11-13 μm vs C. nanningensis: 14-20.5 μm). Additionally, Groves and Skolko (1945), Hall and Sivanesan (1972) and Yi et al (2002) reported that C. cymbopogonis produced 4 to 5-septate conidia, whereas conidia of C. nanningensis only had 3-septa. Curvularia spp.…”

Section: Discussionmentioning

confidence: 99%

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Diseases of Cymbopogon citratus (Poaceae) in China: Curvularia nanningensis sp. nov.

Zhang¹,

Yang²,

Cheng³

et al. 2020

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Five Curvularia strains isolated from diseased leaves of lemongrass (Cymbopogon citratus) in Guangxi Province, China, were examined. NCBI-Blast searches of ITS sequences suggested a high degree of similarity (99–100%) to Curvularia akaii, C. akaiiensis, C. bothriochloae, C. heteropogonis and C. sichuanensis. To accurately identify these strains, we further analysed their morphology and phylogenetic relationships based on combinations of ITS, GAPDH, and tef1 gene sequences. Morphological observations indicated that the key character differing from similar species was conidial size, whereas phylogenetic analyses indicated that the five strains represent one species that is also distinct from C. akaii, C. akaiiensis and C. bothriochloae by conidial size and conidiophore length. Thus, the strains examined are found to represent a new species described herein as Curvularia nanningensis. The pathogenicity test on the host and detached leaves confirmed the new species to be pathogenic on Cymbopogon citratus leaves. Standardised requirements for reliable identification of Curvularia pathogens are also proposed.

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Section: Discussionmentioning

confidence: 89%