The complete plastome sequence of <i>Rumex japonicus</i> Houtt.: a medicinal plant

The phylogenetic position of the monotypic woody Parapteropyrum (Polygonaceae) remains controversial. Parapteropyrum has been thought to be closely related to the woody genera of the tribe Atraphaxideae, although some evidence indicates that it nests within the herbal buckwheat genus Fagopyrum of tribe Polygoneae. In this study, we used plastome data to determine the phylogenetic position of Parapteropyrum ( Fagopyrum ) tibeticum . Different reference species were used to assemble plastomes of three species currently placed in the tribe Ataphaxideae: Parapteropyrum ( Fagopyrum ) tibeticum , Atraphaxis bracteata and Calligonum ebinuricum . Once assembled, plastomes were characterized and compared to plastomes of 12 species across the family Polygonaceae. Phylogenetic analyses of Polygonaceae were performed using whole plastome, all plastome genes, and single-copy genes. Plastomes assembled using different reference plastomes did not differ; however, annotations showed small variation. Plastomes of Parapteropyrum ( Fagopyrum ) tibeticum , A. bracteata and C. ebinuricum have the typical quadripartite structure with lengths between 159,265 bp and 164,270 bp, and a total number of plastome genes of about 130. Plastome microsatellites (SSR) ranged in number from 48 to 77. Maximum Likelihood and Bayesian analyses of three plastome data sets consistently nested Parapteropyrum within the genus Fagopyrum . Furthermore, our analyses indicated that sampled woody genera of the family Polygonaceae are polyphyletic. Our study provides strong evidence that the woody Parapteropyrum tibeticum , which is distantly related to woody genera sampled here, should be taxonomically placed under Fagopyrum as Fagopyrum tibeticum .

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Plastome and phylogenetic relationship of the woody buckwheat Fagopyrum tibeticum in the Qinghai-Tibet Plateau

Yang

Liu

et al. 2021

Plant Diversity

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Study on the Chemical Structures and Free Radical Scavenging Ability of Anthraquinones and Its c-Glycosides from Rumexjaponicus Houtt.

Wang

Xiao

et al. 2021

j biobased mat bioenergy

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Rumex japonicus Houtt. (RJH) is a kind of Traditional Chinese Medicine (TCM) widely used in the treatment of serious skin diseases such as psoriasis. To further explore its bioactive components, the five-year root of RJH was used, the nuclear magnetic resonance (NMR) technique was employed with DMSO-d6 solvent for chemical structures, the scavenging capacity of the free radicals (DPPH, alkyl, –OH, and ˙O−2) was evaluated by electron spin resonance (ESR) method. In the results, seven compounds that were wholly characterized as anthraquinones (1 and 2), its c-glycosides (4–7), and flavonoid glycoside (3) especially for the hydrogen atoms from –OH groups located at phenol rings and glucose moieties. The compound 4 and 5 showed the significant bioac-tivity with the IC50 values (DPPH: 23.34 and 23.25 μM; alkyl: 20.27 and 20.15 μM; –OH: 26.03 and 25.50 μM; and ˙O−2: 14.69 and 14.68 μM, respectively). In conclusion, the DMSO-d6 solvent could make active protons be expressed clearly for accurate assignments. The compounds 4 and 5 could be suggested to be applied for potential candidates for related drugs.

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The complete plastome sequence of Rumex japonicus Houtt.: a medicinal plant

Cited by 2 publications

References 8 publications

Plastome and phylogenetic relationship of the woody buckwheat Fagopyrum tibeticum in the Qinghai-Tibet Plateau

Plastome and phylogenetic relationship of the woody buckwheat Fagopyrum tibeticum in the Qinghai-Tibet Plateau

Study on the Chemical Structures and Free Radical Scavenging Ability of Anthraquinones and Its c-Glycosides from Rumexjaponicus Houtt.

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