Folklore Medicinal Orchids From South India: The Potential Source of Antioxidants

Abstract

Objective:Orchids are widely used the economically important ornamental plant. Conventionally, they were also used for the treatment of several diseases. In the present study, five species of medicinal Orchids from South India were selected to evaluate their antioxidant potential. Methods:The selected species were extracted by Soxhlet method using 70% ethanol. The extracts obtained were analyzed for various quantitative and antioxidant assays followed by correlation analysis in between quantitative and antioxidant activity.Results: Antioxidant data revealed that among the extracts of five orchids, Coelogyne breviscapa was proved to be superior in terms of antioxidant activities, followed by Aerides maculosum, Dendrobium macrostachyum, Pholidota pallida, and Vanda testacea. Correlation analysis was performed, and the results proved simple positive correlation and highest average value of "r" (correlation coefficient) for antioxidant activities with quantitative were the total antioxidants, total phenolics, total flavonoids, and ascorbic acid content. Among the qualitative antioxidant activities, the highest average value of "r" was shown by 2, 2-diphenyl-1-picrylhydrazyl, iron chelating, 2,2-azinobis-3-ethyl-benzothiazoline-6-sulfonic acid, and superoxide radical. Conclusion:The study documents that orchid plants have significant antioxidant potential which can contribute to human health.

Potensi Bunga Anggrek Cymbidium Golden Boy sebagai Sumber Antioksidan dan Aplikasinya pada Flower Leather

“…Pengujian kapasitas antioksidan merujuk pada metode Parveen et al (2018) dengan modifikasi berupa penyesuaian konsentrasi larutan. Sampel fenolik direaksikan dengan reagen DPPH dan menghasilkan perbedaan warna yang dapat dianalisis menggunakan spektrofotometer UV-Vis (Bel Photonic, Brazil).…”

“…Tanaman kaya akan sumber daya bioaktif yang dapat memberikan manfaat yang baik pada tubuh manusia, seperti beberapa jenis anggrek yang mengandung senyawa fenol dan dikenal sebagai sumber antioksidan (Parveen et al, 2018). Senyawa fenol dikenal memberikan perlindungan terhadap stres oksidatif yang disebabkan oleh radikal bebas.…”

“…Anggrek Cymbidium Golden Boy memiliki kadar fenol sebesar 15,32 mg GAE/g yang lebih tinggi dibanding dengan anggrek Phalaenopsis spp. 11,52 mg GAE/g, anggrek Phalaenopsis Sogo Yukidian "V3" 5,092 mg GAE/g, dan Dendrobium macrostachyum sebesar 52,089 µg GAE/g (Minh et al, 2016(Minh et al, , 2017Parveen et al, 2018). Menurut Parveen et al (2018), senyawa fenol pada bahan pangan bagus untuk kesehatan tubuh karena dapat bersifat antioksidan yang memberi perlindungan terhadap stres oksidatif yang dihasilkan ROS pada tingkat sel dan efek kerusakan karena radikal bebas.…”

Quantitative Phytochemical Analysis Reveals Significant Antibiofilm Activity in Pleione maculata, an Endangered Medicinal Orchid

“…They also reported the TPC of Coelogyne breviscapa, which yielded 25.00 mg of GAE/gram of extracts. Coelogyne brevis TFC was observed to be less than 0.0625 mg/mL43 . Coelogyne stricta reported a TFC of about 0.037mg/gram of dry extract53 .At present, several microbes that cause severe diseases affecting people around the globe have become strongly resistant to prescribed antibiotics, so new antibiotics need to be discovered Antibacterial screening of different parts of P. maculata against some clinical isolates Pleione maculata, an epiphytic rare medicinal orchid containing numerous effective secondary metabolites, was evaluated to gauge its antimicrobial and antibiofilm activity51 .…”

“…Total Phenolic content (TPC) of different parts of P. maculata by Folin Ciocalteau reagent with an IC 50 value of 71.91 µg/mL55 . The total phenolic content (TPC) of Coelogyne brevis was 0.081 mg/mL43 and that of Coelogyne stricta was estimated to be a maximum of 0.090 mg/gram of dry extract53 . In Moin et al, 2012, ethyl acetate extracts of Coelogyne stricta had the highest phenolic content of 90 µg GAE/mg of the sample and 39.20 µg GAE/mg in methanol extracts.…”