• Korean Journal of Plant Taxonomy
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• v.46 no.3
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• pp.331-335
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• 2016

Two newly recorded alien plants, Lepidium pinnatifidum Ledeb. (Brassicaceae) and Oxalis dillenii Jacq. (Oxalidaceae), were found on Wolmido Island, Incheon-si and in Gyeongseo-dong, Incheon-si, of South Korea, respectively. Lepidium pinnatifidum is distinguished from other related Korean taxa by leaves that are not amplexicaul and four stamens. Oxalis dillenii is distinguished from other related Korean taxa by having bristles which are dense on peduncles and pedicels and by having white ridges on the seed. We provide descriptions of the morphological characters, photographs and a key to allied taxa in Korea.

• Korean Journal of Pharmacognosy
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• v.32 no.3 s.126
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• pp.233-237
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• 2001

Korean folk medicine 'Koaeng I Bab' has been used to cure hemorrhoid, boil and dermatopathy and as an antidote. The botanical origin of the crude drug has not been studied pharmacognostically. To clarify the botanical origin of 'Koaeng I Bab', the morphological and anatomical characteristics of the leaves of Oxalis species growing in Korea, i.e. O. acetosella, O. acetosella var. purpurascens, O. corniculata, O. obtriangulata were studied. As the result, the botanical origin of 'Koaeng I Bab' has been proved to be O. corniculata and O. acetosella var. purpurascens.

• Korean Chemical Engineering Research
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• v.56 no.3
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• pp.309-314
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• 2018

In this study, methanol extracts of the Oxalidaceae were tested with a potential functional cosmetic agent. As cosmetic agent tests, cell toxicity, polyphenol content, antioxidation, anti-wrinkle, and whitening effects were measured. Cell toxicity of the extracts was weak up to $1,000{\mu}g/mL$. Polyphenol contents of Oxalis corniculata L., Oxalis obtriangulata Maximowicz and Oxalis articulata Savigny were $116.036{\pm}0.37mg/g$, $54.72{\pm}0.52mg/g$ and $88.18{\pm}1.15mg/g$, respectively. Oxalis corniculata L., Oxalis obtriangulata Maximowicz and Oxalis articulata Savigny extracts showed 89%, 80% and 88% of antioxidation effects at $1,000{\mu}g/mL$ concentration using DPPH free radical scavenging assay. Oxalis corniculata L., Oxalis obtriangulata Maximowicz and Oxalis articulata Savigny extracts indicated 81%, 51% and 57% of antiwrinkle effects at $1,000{\mu}g/mL$ concentration using elastase inhibition assay. Oxalis corniculata L. extract was particularly excellent in elastase inhibition effect. Whitening effect using tyrosinase inhibition assay was relatively weak. Lotion formulation including 1% Oxalis obtriangulata Maximowicz extract was stable based on the temperature stability test for 28 days in terms of pH, viscosity and appearance. However, Lotion formulation including 1% Oxalis corniculata L. extract and Oxalis articulata Savigny extract need formulation improvement. From the research, methanol extract of Oxalis corniculata L. seems to be good candidate for antiwrinkle functional cosmetic agent.

• Korean Journal of Plant Taxonomy
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• v.37 no.4
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• pp.419-430
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• 2007

This study was conducted to know the taxonomic features of nuclear ribosomal ITS DNA sequences, ITS1, ITS3 and 5.8S regions, as to nine individuals belonging to four Oxalis species in Korea and an induced species. Sequences of the same regions of sixteen taxa deposited in GenBank were also aligned with those of Korean species as outgroups. The length of ITS sequences aligned in this study is 679 by in total. Evidences, from not only the sequence similarities and divergences but also the phylogenetic and statistical treatments with ITS sequences aligned, were useful for the taxonomy of the genus. The similarity of sequences, among both cauline and acauline taxa, is high as 89% and 95% respectively, but between cauline and acauline taxa, relatively low in the range of 64~69%. The sequence divergences, among both cauline and acauline taxa, is also high as much as 0.36~0.42, but between both cauline and both acauline taxa, low as 0.04~0.06. Two groups between cauline and acauline taxa are paraphyletic, and each group makes a single Glade with a high bootstrap value. The analysis of variance, using ITS sequence aligned, revealed that taxa are significantly different in the level of 0.5%, and O. corymbosa, an induced speices, is also separated from the Korean taxa in the Duncan analysis.