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Phragmidium potentillae-freynianae sp. nov. (HGUP21033, holotype) on Potentilla freyniana. a–c uredinia on leaves d longitudinal section of uredinium e–i urediniospores. Scale bars: 2 mm (b–c); 50 µm (d–e); 25 µm (f–i).
Source publication
In this study, four new species of Phragmidium were proposed based on morphological and molecular characters. In morphology, Phragmidium rosae-roxburghii sp. nov. was distinguished to related taxa by its unique square to diamond-shaped urediniospores; Ph. rubi-coreani sp. nov. differed from Ph. barclayi and Ph. cibanum because of teliospores with f...
Citations
... Phragmidium Notes: Rosa roxburghii as a Chinese herbal medicine is used as a remedy for respiratory diseases. It has been recently reported to be an antioxidant and anticoagulant, and also be used to treat dyspepsia, dysentery, hypo immunity, and neurasthenia [65,111]. Our collection (GMB0104) and P. rosae-roxburghii form a clade in phylogenetic tree with a high support value (100/1). ...
... The morphological characteristics of GMB0104 are consistent with those of P. rosae-roxburghii. Phragmidium rosae-roxburghii was introduced based on the specimen collected from Guizhou province [65]. Here we reported it on medicinal plant in the same province. ...
During the research on rust fungi in medicinal plants of Guizhou Province, China, a total of 9 rust fungal species were introduced, including 3 new species (Hamaspora rubi-alceifolii, Nyssopsora altissima, and Phragmidium cymosum), as well as 6 known species (Melampsora laricis-populina, Melampsoridium carpini, Neophysopella ampelopsidis, Nyssopsora koelrezidis, P. rosae-roxburghii, P. tormentillae). Notably, N. ampelopsidis and P. tormentillae were discovered for the first time in China, while M. laricis-populina, Me. carpini, and Ny. koelreuteriae were first documented in Guizhou Province. Morphological observation and molecular phylogenetic analyses of these species with similar taxa were compared to confirm their taxonomic identities, and taxonomic descriptions, illustrations and host species of those rust fungi on medicinal plant are provided.
Rust fungi are obligate plant pathogens that belong to Basidiomycota, Puccinomycetes, Pucciniales. Guizhou Province in Southwest China is rich in plant resources and has suitable climate conditions for plant disease development, but there are few studies on rust fungi. In this study over 300 plant samples with typical rust symptoms were collected from 33 counties in various regions of Guizhou Province. These samples come from 98 different host plants in 33 families. According to ITS-BLAST comparison results, the rust fungi belonged to 17 genera of 11 families in Chaconiaceae (Mikronegeria), Coleosporiaceae (Coleosporium), Gymnosporangiaceae (Gymnosporangium), Melampsoraceae (Melampsora), Phakopsoraceae (Phakopsora), Phragmidiaceae (Gerwasia, Hamapora, Phragmidium), Pileolariaceae (Pileolaria), Pucciniaceae (Endophylum, Macropyxis, Puccinia, Uromyces), Pucciniastraceae (Pucciniastram), Tranzscheliaceae (Tranzschelia), and Uredinineae incertae sedis (Nyssopsora, Peridiopsora). Phylogenetic analysis based on combined sequence data of ITS, LSU and tef1α loci, coupled with morphological evidence, support the species identification. Ninety-three species of rust fungi were obtained, comprising 29 novel taxa and 61 known species. Most of the rust species belonged to Pucciniaceae (48.9%), while the most prevalent host family infected was Rosaceae (21.9%). The Rosaceae are particularly susceptible to Phragmidium spp.
