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INDONESIA
HAYATI Journal of Biosciences
Published by Institut Pertanian Bogor
ISSN : 19783019     EISSN : 20864094     DOI : -
Core Subject : Science, Agriculture,
Agriculture, Biological Sciences & Forestry Earth & Planetary Sciences
HAYATI Journal of Biosciences (HAYATI J Biosci) publishes articles and short communication in tropical bioscience fields such as development, biotechnology, biodiversity and environmental issues. HAYATI J Biosci covers wide range of all life forms topics including virus, microbes, fungi, plants, animal and human. HAYATI J Biosci has been also indexed/registered in Crossref, DOAJ, CABI, EBSCO, Agricola and ProQuest.
Arjuna Subject : -
Articles 1,116 Documents
 108   109   110   111   112 
Phenolic Profile, Antioxidant, Anti-Cholinesterase, and Anti-Alpha-Amylase Activities of Algerian Ruta graveolens Amira Randa Rimas Meziane; Hind Fenghour; Hanane Seghier; Hayette Bouabida; Ghania Dilekh; Chawki Bensouci; Mustafa Abdullah Yilmaz; Oguz Cakir; Abbas Tarhan
HAYATI Journal of Biosciences Vol. 33 No. 4 (2026): July 2026
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.4308/hjb.33.4.1003-1015

Abstract

Ruta graveolens, belonging to the Rutaceae family, is a medicinal and aromatic plant. It is widely used in traditional Algerian medicine. As part of our contribution to promoting this medicinal plant, we conducted an in-depth study to analyze its phenolic content and evaluate its antioxidant, anti-alzheimer and antidiabetic properties. Our methodical approach consisted of studying the hydroethanolic extract of Ruta graveolens leaves, a plant with well-documented pharmacological properties. The extraction was carried out by maceration under agitation, using a solvent, namely 70% ethanol. The LC-ESI-MS/MS analysis was utilized to identify 14 compounds, revealing the richness of this species in polyphenols and flavonoids, particularly in hesperidin and rutin. In addition, Antioxidant activity is assessed using various recognized scientific tests, the hydroethanolic extract is distinguished by its remarkable ability to trap the DPPH radical, with an IC50 of 43.20±0.96 mg/mL. It also exhibits strong antioxidant activity, as evidenced by IC50 values of 38.01±2.96 mg/mL obtained by the ABTS test and 102.96±3.26; 312.29±6.8; 192.07±6.75 mg/mL by the FRAP, β-carotene and SNP tests respectively. The cholinesterase inhibition was also investigated in this work, specifically against cholinesterase enzymes: acetylcholinesterase (AChE) and butyrylcholinesterase (BChE). Analysis of the extract revealed significant antidiabetic activity, by inhibiting α-amylase enzyme and for the first time, the Algerian Ruta graveolens was reported to inhibit cholinergic and α-amylase enzymes. At the end of this study, it appears that the plant studied has notable biological activities and could be an excellent natural biological product for use in the pharmaceutical field.
The Complete Chloroplast Genome of Melocanna baccifera (Poaceae: Bambusoideae) and its Phylogenetic Implications Thu-Thao Thi Huynh; Nga Thi Nguyen; Phi Anh Ngoc Nguyen; Anh-Duy Hoang Nguyen; Minh Trong Quang
HAYATI Journal of Biosciences Vol. 33 No. 4 (2026): July 2026
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.4308/hjb.33.4.1084-1099

Abstract

Melocanna baccifera is a morphologically distinctive bamboo species in the subfamily Bambusoideae (Poaceae), recognized by a combination of diagnostic vegetative and reproductive characteristics, yet its chloroplast (cp) genomic features and phylogenetic position remain poorly understood. This study aimed to sequence, assemble, and annotate the complete cp genome of M. baccifera and to evaluate its phylogenetic implications within Bambusoideae. The complete cp genome of M. baccifera was de novo assembled into a 139,345 bp circular molecule with a typical quadripartite structure and a GC content of 38.9%. It comprised a large single-copy region of 82,927 bp, a small single-copy region of 12,768 bp, and a pair of inverted repeat regions of 21,825 bp each. The genome encoded a total of 129 genes, including 83 protein-coding genes, 38 transfer RNA genes, and eight ribosomal RNA genes. Comparative analysis showed that the cp genome of M. baccifera was similar to those of other Bambusoideae species in genome size, nucleotide composition, and gene content. Phylogenetic analysis placed M. baccifera in a well-supported clade with Schizostachyum species, consistent with currently recognized relationships within Bambusoideae. These findings provide a valuable plastid genomic resource for M. baccifera and improve our understanding of its evolutionary relationships, thereby offering a molecular foundation for future phylogenomic and evolutionary studies of bamboos.
Biopriming Potential Screening of Endophytic Bacteria to Prevent Amorphophallus muelleri Blume Agaist Soft Rot Disease Through In-vitro and In-Planta Screening Ely Maghfiroh; Ika Roostika; Deden Sukmadjaja; Abdul Munif; Abdjad Asih Nawangsih; Alina Akhdiya
HAYATI Journal of Biosciences Vol. 33 No. 4 (2026): July 2026
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.4308/hjb.33.4.1147-1156

Abstract

Soft rot is the serious problem in cultivation and post harvest of  A. muelleri Blume Yam (Elephant foot Yam).  This experiment aims is to screen and characterize endophytic bacteria that potentially prevent soft rot on porang (A. muelleri Blume) through in-vitro and in-planta screening. Screening of the bacteria resulted three isolates i.e. EAP10, EAP17, and Bacillus velezensis EG113 could inhibit soft rot caused by P. carotovorum B4. The three isolates demonstrated that EAP10, EAP17, Bv EG113 have anti quorum sensing (AQS) activity against Chromobacter violaceum and have capability to decrease the soft rot incidence of porang plantlets artificially infected with Pectobacterium carotovorum B4. Compared to the other selected endophytes, B. velezensis EG113 showed the best capability to decrease the disease incidence (75%). Physiological characterization of the selected endophytic isolates showed cellulolytic, proteolytic, and IAA production capability. The 16S rRNA sequences homology analysis of endophytic isolates showed similarity to Acinetobacter radioresistance (100%) and Bacillus aryabhattai (99%) or Priestia aryabhattai (revision name) respectively for EAP10 and EAP17 isolates. The results suggested that B. velezensis EG113 is potentially to be develop as biopriming agent for early protection of porang.
Biocontrol Potential of Chitinase-Producing Soil Bacteria Against Fusarium proliferatum Wulandari Antika Putri; Nisa Rachmania Mubarik; Aris Tri Wahyudi
HAYATI Journal of Biosciences Vol. 33 No. 4 (2026): July 2026
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.4308/hjb.33.4.1136-1146

Abstract

Fusarium proliferatum, a phytopathogenic fungus, causes significant agricultural losses. Chitinase-producing bacteria from post-mining soil have potential as biocontrol agents because they degrade chitin, a major component of fungal cell walls. This study aimed to isolate, characterize, and purify bacterial chitinase and evaluate its antifungal activity against F. proliferatum. Bacterial isolates were obtained from post-mining soil in Martabe and screened for chitinase activity using chitin agar medium. The selected isolates were identified through 16S rRNA gene sequencing, and the chitinase enzyme was partially purified using ammonium sulfate precipitation. The antifungal activity against F. proliferatum was evaluated using dual-culture and food-poisoning assays. Two isolates, TSU4 and TSU5, exhibited high chitinolytic activity with hydrolytic zone indices of 2.1±0.2 cm and 1.9±0.41 cm, respectively; TSU4 (Bacillus cereus) was selected for further study. The 70% ammonium sulfate-precipitated chitinase showed a specific activity of 15.66 U/mg, and the concentrated enzyme inhibited F. proliferatum growth by 33.8±0.23%. Chitinases belong to the glycoside hydrolase family 18 (GH18), an evolutionarily widespread group of chitin-degrading enzymes with a conserved catalytic domain that hydrolyzes β-1,4 linkages in chitin, making GH18 chitinases effective for degrading fungal cell walls in biocontrol applications. These findings indicate that the chitinase produced by B. cereus TSU4 shows significant antifungal activity and has strong potential as a biocontrol agent against F. proliferatum.
Probiotic and Antimicrobial Potential of Enterococcus faecalis M26 Recovered from Healthy Vietnamese Newborns' Stool Nguyen Ai Linh; Nguyen Khanh Linh; Nguyen Thanh Vu; Nguyen Phuong Thuy
HAYATI Journal of Biosciences Vol. 33 No. 4 (2026): July 2026
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.4308/hjb.33.4.915-926

Abstract

The neonatal gut microbiota, seeded by pioneer bacteria from meconium, is fundamental to lifelong health. Meconium is an underexplored reservoir of host-adapted bacteria with probiotic potential, especially in underrepresented populations, such as those in Vietnam. This study aimed to isolate and characterise Lactic Acid Bacteria (LAB) from the meconium of healthy Vietnamese newborns to identify novel probiotic candidates. From 20 meconium samples, 30 presumptive LAB isolates were selected after phenotypic screening. These isolates underwent comprehensive in vitro assessment. We tested their tolerance to simulated gastrointestinal conditions (pH 2.0 and 0.4% bile salts) and antimicrobial activity against Escherichia coli, Salmonella enterica, and Staphylococcus aureus. Safety was evaluated through antibiotic susceptibility testing and PCR screening for virulence genes. Isolate M26 showed the highest resilience, maintaining a viability of 6.22±0.49 Log CFU/mL at pH 2.0 and 6.31±0.58 Log CFU/mL in 0.4% bile salts. The neutralised cell-free supernatant of M26 showed moderate, broad-spectrum antimicrobial activity against all pathogens tested. M26 was sensitive to clinically relevant antibiotics and lacked key virulence factors (esp, gelE, cylA) and antibiotic resistance genes (vanA, vanB). 16S rRNA gene sequencing identified M26 as Enterococcus faecalis. These findings suggest that neonatal meconium is a source of robust LAB. E. faecalis M26, with high gastrointestinal tolerance and a favourable safety profile, warrants further investigation as a potential region-specific probiotic.
Exploration of Acetic Acid-Producing Bacteria from Heterotrigona itama Honey in Sukabumi, Indonesia Ici Dianita; Rika Raffiudin; Anja Meryandini
HAYATI Journal of Biosciences Vol. 33 No. 4 (2026): July 2026
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.4308/hjb.33.4.1112-1122

Abstract

Honey produced by stingless bees is generally characterized by higher acidity, which is associated with organic acid–producing microorganisms, such as lactic acid and acetic acid–producing. These bacteria can survive in this environment due to their tolerance to high sugar concentrations and low pH. Therefore, this study aimed to explore the presence of lactic acid– and acetic acid–producing bacteria and to analyze their relationship with honey sugar, with a particular focus on the characterization of acetic acid–producing bacteria isolated from Heterotrigona itama honey. This study involved characterizing honey for physicochemical properties and sugar content, and isolating bacteria. Additionally, isolates of acetic acid-producing bacteria were selected on selective media, and molecular identification was performed using 16S rRNA gene sequences. The results show that the proportion of lactic acid– and acetic acid–producing bacteria may influence the sugar content of honey. Honey Hi3 exhibited higher electrical conductivity (EC), total dissolved solids (TDS), moisture content, and acidity compared to the other honey samples. A total of 11 selected isolates showed diverse characteristics and were non-hemolytic. Isolate Hi11 produced 0.3% acetic acid over 48 hours and has optimal acetic acid production in glucose, yeast extract, peptone, and ethanol (GYPE1) medium. Based on 16S rRNA gene sequence analysis, this isolate was identified as the genus Enterobacter. These findings indicate the presence of acetic acid–producing bacteria and their potential contribution to the sour sensory characteristics of H. itama honey in Indonesia.

Page 112 of 112 | Total Record : 1116

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