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All Journal South East Asian Marine Sciences Journal
Nursyirwani Nursyirwani
Department of Marine Sciences, Faculty of Fisheries and Marine, Universitas Riau
Agriculture, Biological Sciences & Forestry Earth & Planetary Sciences Environmental Science

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Phytochemical Analysis of Mangrove Leaf Extract Lumnitzera racemosa as a Potential Source of Bioactive Compounds Fakhrurozi Fakhrurozi; Irwan Effendi; Nursyirwani Nursyirwani; Ronal Kurniawan
South East Asian Marine Sciences Journal Vol. 3 No. 2 (2026): March
Publisher : Science, Technology, and Education Care

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61761/seamas.3.2.52-55

Abstract

This study was conducted to identify the secondary metabolite prile in the leaf extract of Lumnitzera racemosa, which has potential as a natural antibacterial agent. Leaf samples were collected from the mangrove area of Pecinta Alam Bahari (PAB), Dumai City, and extracted with 96% ethanol using a maceration method. Phytochemical tests were conducted qualitatively on seven groups of compounds, namely alkaloids, flavonoids, phenolics, saponins, tannins, triterpenoids, and steroids. Analysis revealed the presence of flavonoids, phenolics, and triterpenoids, while alkaloids, saponins, tannins, and steroids were not detected. The identified compounds have different antibacterial mechanisms but are effective in disrupting the structure and function of bacterial cells. These findings suggest the potential of L. racemosa leaf extract as a source of bioactive compounds for health and aquaculture applications.
Isolation of Antibiotic-Producing Microorganisms from Camponotus melanus in the Mangrove Ecosystem against Pathogenic Bacteria Three Yulinda; Irwan Effendi; Zulkifli Zulkifli; Nursyirwani Nursyirwani; Ummi Mardhiah Batubara
South East Asian Marine Sciences Journal Vol. 3 No. 2 (2026): March
Publisher : Science, Technology, and Education Care

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61761/seamas.3.2.56-61

Abstract

Microorganisms that live in extreme conditions in mangrove ecosystems have unique defence mechanisms that enable them to produce secondary metabolites that function as antibiotics. One of them is the wood ant (Camponotus melanus), which is commonly found in mangrove ecosystems and plays a significant role in these ecosystems. This study aims to identify bacteria associated with C. melanus based on morphological characteristics and biochemical tests, and to test their antibacterial activity against pathogenic bacteria (Aeromonas hydrophila, Pseudomonas aeruginosa, and Staphylococcus aureus). This study was conducted from September to November 2025. The method used was a survey method. The research was conducted from September to November 2025. C. melanus samples were taken from the Marine Station mangrove forest, Dumai City, Riau Province, and analyzed at the Marine Microbiology Laboratory, Faculty of Fisheries and Marine, Universitas Riau. The isolation and identification results yielded three bacterial isolates: C1 and C2, suspected to be Bacillus sp., and C3, suspected to be Citrobacter sp. The antibacterial activity test results of the three isolates produced inhibition zones. This indicates that the three isolates have the potential to serve as sources of promising antibiotic compounds for further development
Co-Authors Fakhrurozi Fakhrurozi Irwan Effendi Ronal Kurniawan Three Yulinda Ummi Mardhiah Batubara Zulkifli Zulkifli