• Korean Journal of Plant Taxonomy
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• v.40 no.2
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• pp.113-117
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• 2010

We examined the sixteen quantitative characters of Trapa and conducted principal component analysis for T. japonica Flerow and T. bispinosa Roxb. in South Korea. Trapa bispinosa has been recorded as 'Ma-reum (T. japonica Flerow)' in the Korean flora, but this taxon is distinct from T. japonica in terms of width, thickness and upper horns of its nuts. Principal component analysis (PCA) confirms the morphologically distinct status for the two species. We suggest the common name 'Keun-ma-reum' for Trapa bispinosa to the Korean flora.

• Korean Journal of Medicinal Crop Science
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• v.24 no.1
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• pp.14-20
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• 2016

Background : This study aimed to investigate the antioxidant and antiproliferative activities of extract from different parts of water chestnut (Trapa japonica Flerow). Methods and Results : The total polyphenol content of pericarp and seed extract was 438.31 mg/g and 25.32 mg/g respectively. DPPH radical scavenging assay showed that the half maximal inhibitory concentration ($IC_{50}$ values) of pericarp and seed extract were $5.28{\mu}g/m{\ell}$ and $355.51{\mu}g/m{\ell}$ respectively. In addition, the pericarp extract showed strong reducing power. In the MTT assay, the pericarp extract significantly inhibited the viability of A549, AGS, HeLa, PC-3, HCT116, HT29 and SW620 cell lines compared with the seed extract. Conclusions : These results suggest that T. japonica Flerow extracts have significant antioxidant and antiproliferative activity.