Total phenolic, flavonoid content, and antioxidant activity of bulbs, leaves, and flowers made from Eleutherine bulbosa (Mill.) Urb.

Peiqi Shi,Lianbao Ye,Xiaodong Chen,Yuanyuan Wang,Wenjun Du,Xingxing Teng

doi:10.1002/fsn3.834

Abstract

In the current investigation, total phenols and flavonoids contents of Eleutherine bulbosa (Mill.) Urb. bulbs, leaves, and flowers were quantified by Folin–Ciocalteu's and borohydride/chloroquinone methods, respectively. Antioxidant activity of the plant extracts was evaluated by means of peroxide scavenging capacity assay and by cell antioxidation method. Antioxidant activity of E. bulbosa bulbs, leaves, and flowers was correlated with total phenols and flavonoids. The total phenols and flavonoids of the bulbs of E. bulbosa were higher than leaves and flower and its antioxidant activity was also stronger than leaves and flowers of E. bulbosa. The higher content of flavonoids or total phenols, the stronger the antioxidant capacity in vitro. The antioxidant activity of E. bulbosa extract showed it's certain nutritional value and therefore had the potential as a source of natural antioxidants.

Highlights

Eleutherine(E.) bulbosa (Mill.) Urb belongs to the Iredaceae Eleutherine
Eleutherine bulbosa is an Iridaceae popularly known in the Amazonian region where it exists in the form of a clump with red bulbs like an onion and its leaves are entire, pleated, and simple, and its flowers are colored in white to pink and the red bulbs are widely used in Brazilian folk phototherapy, especially in the Amazonian region (Malheiros, Mello, & Barbosa, 2015)
Antioxidant capacity test showed that the ascorbic acid equivalent of flowers is much higher than the content of stems and leaves which means that the order of antioxidant capacity in vitro is flowers > bulbs > leaves

Summary

| INTRODUCTION

Eleutherine(E.) bulbosa (Mill.) Urb belongs to the Iredaceae Eleutherine. Eleutherine bulbosa was reported in the literature as Eleutherine plicata (Goldblatt & Snow, 1991). In China and South-East Asia, the bulbs of E. bulbosa were widely used as medicine and played an important role in medical care and disease treatment. It could be used for treating hemoptysis, dysentery, irregular menstruation, abdominal pain, rheumatalgia, traumatic injury, and sore boil (Min, Wu, & Zhu, 2015). It was reported that the bulbs of Eleutherine (E. bulbosa and E. americana) contained naphtoquinones such as elecanacine, eleutherine, eleutherol, and eleutherinone, which were usually existed in cell vacuoles in the form of glycosides and had antimicrobial, antifungal, antiviral, anticancer, antioxidant, and antiparasitic properties (Dai, Min, Zhong, & Wang, 2013). Antioxidant activity of extracts was evaluated by means of peroxide scavenging capacity (PSC) assay and by the cell antioxidation method

| MATERIALS AND METHODS

| RESULTS AND DISCUSSION

| CONCLUSION