Phytochemical Composition and Antioxidant Activity of Leaf Extracts from Three Rhizophora Species from Bontang Waters, Indonesia

Dewi E. Bulan1,2*, Nurfadilah Nurfadilah1, Muhammad R. Syahrir1, Andi Mismawati3, Arifuddin K. Torambung4, Maulida Rachmawati5
1Department of Aquatic Resource Management, Faculty of Fisheries and Marine Science, Mulawarman University, Samarinda, East Kalimantan, Indonesia
2Research Center for Drugs and Cosmetics from Tropical Rainforest Resources, Mulawarman University, Samarinda, Indonesia
3Department of Aquaculture, Faculty of Fisheries and Marine Science, Mulawarman University, Samarinda, East Kalimantan, Indonesia
4Department of Forestry, Faculty of Forestry, Mulawarman University, Samarinda, East Kalimantan, Indonesia
5Department of Agricultural Product Technology, Faculty of Agricultural, Mulawarman University, Samarinda, East Kalimantan, Indonesia

Corresponding Author: [email protected]; Tel: +6281350834836
Recieved Date: 07 January 2022; Accepted Date: 25 July 2022; Published Date: 03 September
Citation: Bulan DE, Nurfadilah N, Syahrir MR, Mismawati A, Torambung AK, Rachmawati M. Phytochemical Composition and Antioxidant Activity of Leaf Extracts from Three Rhizophora Species from Bontang Waters, Indonesia. Running Title: Natural Antioxidant Activity of Rhizophora Species from Bontang Waters in Indonesia. Trop J Nat Prod Res. 2022; 6(8):1178-1182. http://www.doi.org/10.26538/tjnpr/v6i8.2
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© 2022 Bulan et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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ABSTRACT

The Rhizophora genus is a prominent mangrove distributed in tropical Bontang waters. However, exploration of antioxidant potential has received very little attention. The present study was, therefore, conducted to investigate the phytochemical properties and antioxidant activity of three Rhizophora species from Bontang waters in Indonesia. Leaves of Rhizophora mucronata, Rhizophora apiculata, and Rhizophora stylosa were extracted with methanol (polar target molecules) and ethyl acetate (semi-polar target molecule) using the successive extraction method. The extractive yields of the two solvents were determined, and the three Rhizophora crude extracts were subjected to standard phytochemical screening. The DPPH (1,1-diphenyl-2-picrylhydrazyl) radical scavenging assay was used to assess the antioxidant activity of the three Rhizophora extracts. The results showed that ethanol extractive yields were higher in all samples than ethyl acetate extractive yields. The phytochemical screening results indicated that the ethyl acetate extract contains a greater variety of metabolites than the methanol extract. Both ethyl acetate and methanol extracts demonstrated significant anti-DPPH radical activity. The R. mucronata extract in methanol had the highest antioxidant activity, with an IC50 value of 0.04±0.00 g/ml, followed by the R. stylosa extract at 0.37±0.09 g/mL, and the R. apiculata extract at 5.06 ± 0.41 g/mL. Meanwhile, the IC50 values of the R. apiculata, R. stylosa, and R. mucronata extracts in ethyl acetate were 0.72±0.07, 1.16±0.04, and 2.34±0.12 g/mL, respectively. The findings of the study suggest that the ethyl acetate and methanol extracts of Rhizophora mucronata, Rhizophora stylosa, and Rhizophora apiculata have the potential to be developed as natural antioxidants.

Keywords: Antioxidant, Bontang waters, Phytochemical properties, Rhizophora.
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ISSN: 2616-0684 (Print)
ISSN: 2616-0692 (Online)
DOI: 10.26538/tjnpr
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