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Phytochemical analysis and antibacterial activities of eleutherine bulbosa(Mill.) Urb. extract against Vibrio parahaemolyticus

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Asian Pacific Journal of Tropical Biomedicine 2019年第9期9卷 397-404页

作者： Waode Munaeni Widanarni Munti Yuhana Mia Setiawati Aris T.Wahyudi Department of Aquaculture Faculty of Fisheries and Marine ScienceIPB University(Bogor Agricultural University)Bogor 16680Indonesia Department of Aquaculture Faculty of Fisheries and Marine ScienceHalu Oleo UniversityKendari 93232Indonesia Department of Biology Faculty of Mathematics and Natural ScienceIPB University(Bogor Agricultural University)Bogor 16680Indonesia

Objective: To analyze compounds in eleutherine bulbosa(E. bulbosa)(Mill.) Urb. extract and to determine its antibacterial capability against Vibrio parahaemolyticus(V. parahaemolyticus).Methods: E. bulbosa bulb extract was preprared using 96% ethanol by the maceration method. Phytochemical investigation of E. bulbosa extract was analyzed using GC-MS, spectrophotometry and titrimetry methods. The zone of inhibition was identified by the diffusion agar method. The minimum inhibitory concentration and minimum bactericidal concentration were determined using the plate count method. The inhibitory rate against V. parahaemolyticus was determined by the microdilution method. Cellular leakage was evaluated by spectrophotometry and cellular damage was observed by scanning electron microscopy. Results: GC-MS analysis showed the high compound of the E. bulbosa extract was securixanthone E(7-hydroxy-1,2-dimethoxyxanthone). The compound groups also included fatty acid esters, isoquinolines, naphthalenes, and phenolics. The total phenolic content was(2.50 ± 0.00) mg/g, flavonoid(6.61 ± 0.00) mg/g, and tannin(0.03 ± 0.00)%. The greatest zone of inhibition and inhibitory rate were(11.83 ± 0.06) mm and(91.32 ± 2.76)%, respectively, at 10 mg/m L. The minimum inhibitory concentration was 0.156 mg/m L, while the minimum bactericidal concentration was 10 mg/m L. The E. bulbosa extract caused leakage and cellular damage to V. parahaemolyticus. Conclusions: The E. bulbosa extract possesses inhibitory activities against V. parahaemolyticus and causes cellular leakage and damage.

关键词： Phytochemical eleutherine bulbosa Antibacterial Vibrio parahaemolyticus

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In vitro Antioxidant Activity of Extracts from eleutherine plicata Herb by Different Extraction Methods

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Medicinal Plant 2017年第6期8卷 21-23页

作者： Yalan LUO Yuan LIU Luyang LU Jizhong ZHANG Shanshan MA School of Pharmacy Southwest Minzu University

[Objectives] To study in vitro antioxidant activity of extracts from eleutherine plicata Herb by different extraction methods.[Methods]1,1-diphenyl-2-picrylhydrazyl( DPPH) free radical scavenging method,2,2'-Azinobis( 3-ehtylbenzothiazolin-6-sulfnic acid) diammonium salt( ABTS) free radical scavenging method,and iron ion reduction ability determination method were applied to measure the extracts of eleutherine plicata Herb by ethanol extraction,water extraction,and ethanol extraction after water extraction,and comparison was made with positive control Vc( vitamin C). [Results]The ethanol extract,water extract,and ethanol extract after water extraction of eleutherine plicata Herb had a high DPPH free radical,ABTS free radical scavenging activity,and reducing activity. [Conclusions]E. plicata Herb is a natural antioxidant with high potential.

关键词： eleutherine plicata Herb DPPH ABTS^+ Reducing ability Antioxidant activity

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