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All Journal Biodiversitas Journal of Biological Diversity
ARRIZAL RAHMAN
Environmental Office of Balikpapan. Jl. Ruhui Rahayu 1, No. 8, Balikpapan 76115, East Kalimantan, Indonesia
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology

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GC-MS analysis of three Diospyros species and evaluation of its in vitro rat intestinal a-glucosidase and FRAP activity NOVA ALFIAN HARIYANTO; RICO RAMADHAN; YANUARDI RAHARJO; YAZDANIYAR FAJRI HALIMI FIRDAUS; IRMAYANTI TRI KURNIA; DINDA AYU LESTARI; SUHARTINI SUWANDARI; NUR FARIHA MAHMUDA; JOURDHAM NATHANAEL; KIETTIPUM PHONTREE; PREECHA PHUWAPRAISIRISAN; LUKMAN RIYADI; ARRIZAL RAHMAN; NURLITA ABDULGANI
Biodiversitas Journal of Biological Diversity Vol. 25 No. 6 (2024)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d250613

Abstract

Abstract. Hariyanto NA, Ramadhan R, Raharjo Y, Firdaus YFH, Kurnia IT, Lestari DA, Suwandari S, Mahmuda NF, Nathanael J, Phontree K, Phuwapraisirisan P, Riyadi L, Rahman A, Abdulgani N. 2024. GC-MS analysis of three Diospyros species and evaluation of its in vitro rat intestinal a-glucosidase and FRAP activity. Biodiversitas 25: 2442-2453. The vast diversity of natural products has long been recognized as a potentially valuable source of bioactive compounds derived from nature. The Diospyros species, belonging to the Ebenaceae family, thrive in tropical forest regions and have been traditionally used for treating various disorders such as ischemic stroke, hypertension, and infectious diseases. This research aims to assess the phytochemical constituents, rat intestinal a-glucosidase, and Ferric-Reducing Antioxidant Power (FRAP) of non-polar (n-hexane) and semi-polar (dichloromethane) extracts from three Diospyros species, i.e., Diospyros buxifolia (Blume) Hiern; Diospyros celebica Bakh.; Diospyros confertiflora (Hiern) Bakh). Gas Chromatography-Mass Spectrometry (GC-MS) analysis identified numerous bioactive secondary metabolites in the extracts. The study revealed that the semi-polar extracts of D. buxifolia exhibited potent rat intestinal a-glucosidase inhibitory activities, with an IC50 value of 33.31±3.23 ug/mL. The IC50 of acarbose as a positive control was 6.31±0.31 ug/mL. The FRAP test demonstrated that the non-polar and semi-polar leaf extracts of the three Diospyros species from East Kalimantan are potential sources of natural antioxidants, with the IC50 in the range of 6.48±0.38 umol Fe/g - 11.35±0.16 umol Fe/g. The results of this study confirm the therapeutic properties of leaf extracts derived from 3 Diospyros species, which align with their traditional medicinal use.
Potential of antimicrobial-producing endophytic bacteria from Balikpapan endemic ginger (Etlingera balikpapanensis A.D. Poulsen) FATIMAH FATIMAH; LILLAH ASRITAFRIHA; SYARIFAH SALSABILA; ERNA KRISTIANA DEWI; NI’MATUZAHROH NI’MATUZAHROH; ALMANDO GERALDI; RICO RAMADHAN; HERY SUWITO; ARRIZAL RAHMAN; LUKMAN RIYADI
Biodiversitas Journal of Biological Diversity Vol. 25 No. 9 (2024)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d250922

Abstract

Abstract. Fatimah, Asritafriha L, Salsabila S, Dewi EK, Ni’matuzahroh, Geraldi A, Ramadhan R, Suwito H, Rahman A, Riyadi L. 2024. Potential of antimicrobial-producing endophytic bacteria from Balikpapan endemic ginger (Etlingera balikpapanensis A.D. Poulsen). Biodiversitas 25: 3005-3013. Etlingera balikpapanensis A.D. Poulsen is a new species of the Zingiberaceae family, which was discovered as an endemic species in the Balikpapan, Kalimantan. This study aimed to isolate endophytic bacteria from endemic Balikpapan ginger (E. balikpapanensis) and evaluate its antimicrobial activity against Escherichia coli, Staphylococcus aureus, and Candida albicans and to identify the most promising antimicrobial isolates. Plant samples include roots, stems, and leaves. The process of isolating bacteria from various plant parts, such as roots, stems, and leaves, involved repeated subculturing until pure isolates were obtained. Seven pure isolates were successfully obtained, coded as 6D, 5R, 2R, 3D1, 10D, 4R2, and 2D. Macroscopic, microscopic, and biochemical characterization of the seven isolates was carried out. The seven endophytic bacteria had varied macroscopic characteristics and were Gram-positive. The disc diffusion method was used to determine the ability of isolates to produce antimicrobial agents. The isolates showed antibacterial activity against E. coli and S. aureus. Isolates 3D1 and 5R showed the highest antibacterial activity against E. coli (8.20±0.47 mm and 8.57±0.08 mm), and 5R also showed the highest antibacterial activity against S. aureus (8.14±0.49 mm). These results demonstrate the potential of these isolates as effective antimicrobial agents. The 16S rRNA gene analysis revealed that isolate 3D1 was identified as Bacillus cereus strain PJA4.2 and isolate 5R as Micrococcus luteus strain SGAir0127 with similarity of 99.55% and 100%, respectively.
Co-Authors ALMANDO GERALDI DINDA AYU LESTARI ERNA KRISTIANA DEWI FATIMAH FATIMAH HERY SUWITO IRMAYANTI TRI KURNIA JOURDHAM NATHANAEL KIETTIPUM PHONTREE LILLAH ASRITAFRIHA LUKMAN RIYADI NI’MATUZAHROH NI’MATUZAHROH NOVA ALFIAN HARIYANTO NUR FARIHA MAHMUDA NURLITA ABDULGANI PREECHA PHUWAPRAISIRISAN RICO RAMADHAN RICO RAMADHAN SUHARTINI SUWANDARI SYARIFAH SALSABILA YANUARDI RAHARJO YAZDANIYAR FAJRI HALIMI FIRDAUS