Topic
Gynura bicolor
About: Gynura bicolor is a research topic. Over the lifetime, 152 publications have been published within this topic receiving 932 citations.
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TL;DR: Significant and positive correlations between antioxidant activity and polyphenols, anthocyanidins, Que, Myr, and morin were observed, indicating that these phytochemicals were some of the main components responsible for the antioxidant activity of tested plants.
Abstract: The objectives of this study were to identify the antioxidants and antioxidant axtivity in 27 of Taiwan’s indigenous vegetables. Lycium chinense (Lc), Lactuca indica (Li), and Perilla ocymoides (Po) contained abundant quercetin (Que), while Artemisia lactiflora (Al) and Gynura bicolor (Gb) were rich in morin and kaempferol, respectively. Additionally, Nymphoides cristata (Nc) and Sechium edule (Se)-yellow had significantly higher levels of myricetin (Myr) than other tested samples. Cyanidin (Cyan) and malvidin (Mal) were abundant in Gb, Abelmoschus esculentus Moench (Abe), Po, Anisogonium esculentum (Retz.) Presl (Ane), Ipomoea batatas (Ib)-purple, and Hemerocallis fulva (Hf)-bright orange. Relatively high levels of Trolox equivalent antioxidant capacity (TEAC), oxygen radical absorption capacity (ORAC), and 1,1-diphenyl-2-picryl-hydrazyl (DPPH) radical scavenger were generated from extracts of Toona sinensis (Ts) and Po. Significant and positive correlations between antioxidant activity and polyphenols, anthocyanidins, Que, Myr, and morin were observed, indicating that these phytochemicals were some of the main components responsible for the antioxidant activity of tested plants. The much higher antioxidant activity of Po, Ts, and Ib (purple leaf) may be related to their higher Cyan, Que, and polyphenol content.
68 citations
TL;DR: This study reveals that G. procumbens root extract is a good source of natural antioxidant and ferric reducing antioxidant power in plants analysed.
Abstract: Plants from Gynura family was used in this study, namely, Gynura procumbens and Gynura bicolor. Gynura procumbens is well known for its various medicinal properties such as antihyperglycaemic, antihyperlipidaemic, and antiulcerogenic; meanwhile, G. bicolor remains unexploited. Several nonenzymatic antioxidants methods were utilized to study the antioxidant capacity, which include ferric reducing antioxidant power (FRAP), 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging assay, total flavonoid content, total phenolic content, and ascorbic acid content determination. DPPH assay reveals G. procumbens shoot as the lowest (66.885%) and G. procumbens root as the highest (93.499%) DPPH radical inhibitor. In FRAP assay, reducing power was not detected in G. procumbens leaf callus (0.000 TEAC mg/g FW) whereby G. procumbens root exhibits the highest (1.103 TEAC mg/g FW) ferric reducing power. Total phenolic content and total flavonoid content exhibited similar trend for both the intact plants analysed. In all antioxidant assays, G. procumbens callus culture exhibits very low antioxidant activity. However, G. procumbens root exhibited highest phenolic content, flavonoid content, and ascorbic acid content with 4.957 TEAC mg/g FW, 543.529 QE µg/g FW, and 54.723 µg/g FW, respectively. This study reveals that G. procumbens root extract is a good source of natural antioxidant.
46 citations
TL;DR: Dietary administration of a G. bicolor extract could enhance the innate immunity within 28 days as evidenced by the increases in immune parameters (PO, RBs, and lysozyme) and antioxidant enzyme (SOD) activities of shrimp to against V. alginolyticus and WSSV infections.
33 citations
TL;DR: In this article, two novel polyacylated anthocyanins (bicolnin and bicolmalonin) and a known one (rubrocinerarin) were isolated from the leaves of G. bicolor DC.
Abstract: Gynura bicolor DC. is a traditional vegetable in Japan and its leaves are characterized by the fact that their adaxial and abaxial sides are green and reddish purple, respectively. Two novel poly-acylated anthocyanins (bicolnin and bicolmalonin) and a known one (rubrocinerarin) were isolated from the leaves of G. bicolor as major anthocyanins. These anthocyanins were identified to be cyanidin 3-O-[β-D-glucopyranoside]-7-O-[6-O-(E)-(4-O-(6-O-(E)-caffeoyl-β-D-glucopyranosyl)-caffeoyl)-β-D-glucopyranoside]-3′-O-[6-O-(E)-caffeoyl-β-D-glucopyranoside] (bicolnin), cyanidin 3-O-[6-O-malonyl-β-D-glucopyranoside]-7-O-[6-O-(E)-(4-O-(6-O-(E)-caffeoyl-β-D-glucopyranosyl)-caffeoyl)-β-D-glucopyranoside]-3′-O-[6-O-(E)-caffeoyl-β-D-glucopyranoside] (rubrocinerarin), and cyanidin 3-O-[4, 6-di-O-malonyl-β-D-glucopyranoside]-7-O-[6-O-(E)-(4-O-(6-O-(E)-caffeoyl-β-D-glucopyranosyl)-caffeoyl)-β-D-glucopyranoside]-3′-O-[6-O-(E)-caffeoyl-β-D-glucopyranoside] (bicolmalonin) by MS and NMR analyses. These three anthocyanins exhibited higher antioxidative activities compared to cyanidin 3-glucoside as evaluated by 1, 1-diphenyl-2-picrylhydrazyl and oxygen radical absorbance capacity assays.
31 citations
TL;DR: It was concluded that the water extract of G. bicolor can maintain physiological homeostasis and enhance immunity against V. alginolyticus infection in L. vannamei.
30 citations