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Journal of Tropical Life Science : International Journal of Theoretical, Experimental, and Applied Life Sciences
Published by Universitas Brawijaya
ISSN : 20875517     EISSN : 25274376     DOI : -
Core Subject : Agriculture, Social,
Agriculture, Biological Sciences & Forestry Environmental Science
The Journal of Tropical Life Science (JTLS) provides publication of full-length papers, short communication and review articles describing of new finding or theory in living system, cells and molecular level in tropical life science and related areas. The journal publishes articles that report novel findings of wide Tropical Life system phenomenon in the areas of biodiversity, agriculture, fisheries, health, husbandry, forestry and environmental technology. JTLS has 1 volume with 3 issues per year.
Arjuna Subject : -
Articles 815 Documents
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Potential of Single Garlic to Prevent Pro Inflammatory Macrophage and Inflammation in HFD Mice Putri Diyah Anggraini; Miftahul Mufinadiroh; Hendra Susanto; Betty Lukiati; Sri Rahayu Lestari
Journal of Tropical Life Science Vol. 12 No. 1 (2022)
Publisher : Journal of Tropical Life Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/jtls.12.01.10

Abstract

A high-fat-enriched diet causes an increase in the level of oxidized LDL (Ox-LDL) in the blood. The presence of Ox-LDL will activate macrophages to secrete pro-inflammatory cytokines and lead to severe inflammation. Single bulb garlic has a potential anti-inflammatory effect due to of high-fat diet. This research aimed to investigate the effect of single bulb garlic extract (SBGE) on the pro-inflammatory cytokines TNF-α (CD11b+TNF-α+) and IL-1b (CD11b+IL-1b+) in the spleen, spleen weight, and TNF-α secretion in HFD mice. Twenty-four mice were divided into six groups: normal (healthy mice); HFD (HFD mice without any treatment); HFD + Simvastatin (HFD mice receiving simvastatin); HFD + SBGE 100; HFD + SBGE 200; and HFD + SBGE 400 (HFD mice receiving 100, 200, and 400 mg/kg BW of SBGE for 4 weeks). Blood serum was collected at the end of treatment, and macrophage was isolated from the spleen. The relative number of CD11b+TNF-α+ and CD11b+IL-1b+ were examined using flow cytometry. SBGE treatment significantly (p<0.05) reduced the spleen weight and the relative number of CD11b+TNF-α+ and CD11b+IL-1b+ in the spleen of HFD mice. SBGE treatment also prevents the elevation of TNF- α levels in the blood serum. The optimal dose of SBGE to diminish the relative number of CD11b+TNF-α+, CD11b+IL-1b+ in the spleen, and TNF-α in the serum was 100 mg/kg BW.
Effect of Acute Toxicity of Commercial Organophosphate Insecticide Based on Chlorpyrifos on Fejervarya limnocharis Tadpoles (Anura: Dicroglossidae): Acute Toxicity of Commercial Chloropyrifos on Fejervarya limnocharis Tadpole Shima Ramadani; Agung Pramana Warih Marhendra; Dewa Gede Raka Wiadnya; Nia Kurniawan
Journal of Tropical Life Science Vol. 12 No. 2 (2022)
Publisher : Journal of Tropical Life Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/jtls.12.02.09

Abstract

Organophosphate pesticides, especially chlorpyrifos, are one of the most widely used insecticides in agriculture, but their toxicity and potential sensitivity effects on Anura, especially Fejervarya limnocharis are still unknown. The purpose of this investigation is to study F. limnocharis (Anura: Dicroglossidae) tadpole sensitivity to lethal (survivability) and sublethal effects (morphological alterations and swimming activity) of chlorpyrifos in Dursban 200EC commercial formula under acute exposure. An acute toxicity test was carried out on ten tadpoles (Gosner 25) in each repetition. The sample was obtained from artificial reproduction by injecting the Trial Batch 2000 IU hCG by Kings Lab. The acute toxicity testing consisted of three replicates with a chlorpyrifos concentration of 0; 0.4; 0.8; 1; 2; 4; and 8 µg/L. Physico-chemical parameters, mortality, morphological, and swimming alterations of each concentration were observed at 24th, 48th, 72nd, and 96th hours. The LC50 of chlorpyrifos for F. limnocharis tadpoles was 2.86 µg/L. The percentage of survivability F. limnocharis tadpoles decreased after exposure to chlorpyrifos above 1µg/L, while morphological alterations were observed in 2 µg/L and 4 µg/L after 48th hours exposure, and the swimming alterations have occurred at 24th hours in 1; 2; 4 and 8 µg/L. Morphological alterations were observed including asymmetrical body shape, edema, and abnormal tail shape. Based on the LC50 value, commercial chlorpyrifos has high-level toxicity on F. limnocharis tadpoles.Keywords: Acute, Chlorpyrifos, Dursban 200 EC, Fejervarya limnocharis, Tadpoles
Genomic Analysis for Haloacid Dehalogenase in Bacillus megaterium WSH-002 Luqman Arif Zulkarnain; Fahrul Zaman Huyop
Journal of Tropical Life Science Vol. 12 No. 1 (2022)
Publisher : Journal of Tropical Life Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/jtls.12.01.07

Abstract

Bacterial dehalogenation is one of the processes that can reduce the environmental pollutions. The attributes of Bacillus megaterium sp. that able to grow in polluted environment suggested that, its genome contains pollutant degrading genes. To date, there were no reports related to dehalogenase in Bacillus megaterium WSH-002 and how it was regulated. Therefore, the presence of environmentally important genes that can detoxify organohalogens in many microbial genomes including Bacillus megaterium WSH-002 will be investigated. The results from genome annotations of Bacillus megaterium WSH-002 has shown its potential for bioremediation due to the putative haloacid dehalogenase proteins. Only one type of haloacid dehalogenase was identified. It was classified as haloacid dehalogenase type II because of its amino acid sequence are highly identical with HAD_type_II and HAD_L2-DEX. The study concluded that, the genome of Bacillus megaterium WSH-002 contains haloacid dehalogenase genes that is useful for biodegradation of halogenated compound. In future, further investigation on the expression of the dehalogenase gene as recombinant protein and bioinformatic analysis to study dehalogenase protein structure and functions will be considered. 
Molecular Docking and Interaction Analysis of Propolis Compounds Against SARS-CoV-2 Receptor: Propolis Compound Against SARS-CoV-2 Receptor Mokhamad Fahmi Rizki Syaban; Icha Farihah Deniyati Faratisha; Khadijah Cahya Yunita; Nabila Erina Erwan; Dedy Budi Kurniawan; Gumilar Fardhani Ami Putra
Journal of Tropical Life Science Vol. 12 No. 2 (2022)
Publisher : Journal of Tropical Life Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/jtls.12.02.08

Abstract

Background: For many people, especially in developing countries, herbal medicine is the most traditional drug choice to treat all diseases including severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2 infection). Propolis is one of the popular herbal medicine which has various health benefits, particularly antiviral activity. In this molecular docking study, this investigation examined twenty-five kinds of propolis to bind SARS-CoV-2 protein with the main targets of ACE-2 and M-Pro receptors. Method: Propolis ligands were downloaded from PubChem, meanwhile ACE-2 and M-Pro receptors were downloaded from Protein Data Bank. Both ligands and targets were optimized by Pymol. The pharmacokinetic analysis was conducted using SwissADME. Molecular docking was done using PyRx 0.9 and its binding interaction was visualized by Discovery Studio. To predict the potential inhibition, this study compared the ligand-protein complex of propolis to ligands from the previous study. Result: Through the Lipinski rule, only five of twenty-five types of propolis were not qualified for the criterion. The ability to bind protein targets were various between ligands, the highest affinity to ACE-2 receptors were abietic acid, galangin, chrysin, kaempferol and acacetin, respectively. The binding affinity between ligand and M-Pro were seen weaker than ACE-2 receptor, while the strongest were kaempferol, abietic acid, acacetin, galangin and chrysin, respectively. Conclusion:  Kaempferol is the most potent form of propolis to bind to ACE-2 and M-Pro receptors by assessing the binding affinity and the amount of amino acid residue formation when compared to control ligands. Keywords: ACE-2 receptor, COVID-19, Main protease, Molecular docking, Propolis, SARS-CoV-2
Fish Biodiversity and Water Quality of Tropical Forest Streams Adjacent to the Western Boundary of Kinabalu Park, Sabah: Fish and Water Quality of Sabah Forest Streams Chen Lin Soo; Hairul Hafiz Mahsol; Leonardo Jainih; Arman Hadi Fikri; Cheng-Ann Chen; Nur Syafiqah Shamsul Kamal
Journal of Tropical Life Science Vol. 12 No. 2 (2022)
Publisher : Journal of Tropical Life Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/jtls.12.02.12

Abstract

Modification and degradation of habitats outside the boundaries of a national parkmay result in the park's integrity being compromised. Thus, the present study aims todocument variation in freshwater fish and water quality of tropical forest streams adjacent to the western boundary of Kinabalu Park, Sabah. Concurrently, fish samplesand environmental parameters were collected at six stations covering a total streamline length of 10 km. The three most abundant species were Tor tambra (34.4%), Barbodes sealei (19.5%), and Lobocheilos ovalis (12.4%). Tor tambra exhibited a negative allometric growth pattern (coefficient < 3) and was in poor to fair condition (0.8< Fulton’s condition factor < 1.2). The highest fish abundance was found in downstream stations with species addition. Metrics of diversity, such as Shannon's diversityindex and the Margalef index of species richness, decreased as elevation increasedfrom 100 to 600 metres above sea level. The water quality of the forest streams isgood, classified as Class I and/or Class II by Malaysia's National Water Quality Standards, except for ammoniacal nitrogen at station 6, which was classified as Class III.Higher turbidity, orthophosphate, and ammoniacal-nitrogen values were found nearthe Podos village. In conclusion, the altitudinal gradient of fish biodiversity was observed in the forest streams near Kinabalu Park. Regular water quality monitoring ofthe downstream river is necessary, as indicated by the potential domestic impacts onthe river.Keywords: Biodiversity, Elevation, Freshwater fish, Forest stream, Kinabalu Park
Bacterial Community Structure in Sago Pith and Sago Waste Water and Its Potential Uses as Organic Acids Producer: Bacterial community structure in sago Eka Pratiwi Tenriawaru; Suharjono Suharjono; Tri Ardyati; Elok Zubaidah
Journal of Tropical Life Science Vol. 12 No. 2 (2022)
Publisher : Journal of Tropical Life Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/jtls.12.02.03

Abstract

Sago is one of commodities in South Sulawesi. The extraction process of sago flour produces waste water that still contains organic matter and smells sour. So, it has the potential as a pollutant. The sour odor produced allows the presence of acid-producing bacteria that can be used for waste treatment. The objective of this research is to explore the bacterial community structure in sago pith and sago waste water through high-throughput sequencing technology and its potential uses as organic acids producer. Samples were obtained from a traditional sago factory in Palopo City, South Sulawesi, Indonesia. The acidity degree, total dissolve solid, and temperature were measured in the sago pool at the sampling area, while the nutrient contents were analyzed by titration method in Testing Laboratory of Food Quality and Food Safety, Brawijaya University. Bacterial cells in the sago waste water were acquired through a multilevel filtering process on filter paper with pore nitrocellulose membrane sizes of 0.45 and 0.20 µm. Total DNA trapped in the nitrocellulose membrane with pore size of 0.20 µm was isolated using FastDNA Spin Kit (MPBIO) and the V3-V4 regions of 16S rDNA (341f-806r) were amplified. Amplicons were analyzed by Miseq of Illumina and further analyzed by Muscle v.3.8.31, QIIME v.1.7.0, and R v.2.15.3. The result shows that nutrient content in sago pith is higher than in sago waste water. Both samples are dominated by Phylum Proteobacteria and share 189 common bacterial species. The dominant bacteria that can produce organic acid in sago pith are Dysgonomonas sp., Propionispira sp., and Lactobacillus pentosus. While, Lactobacillus mali and Gluconobacter frateurii are the dominant organic acid-producer bacteria in sago waste water.   Keywords: Bacterial community structure, Next generating sequencing, Sago pith, Sago wastewater
New Insights on the Morphology of the Philippine Endemic Ficus pseudopalma Blanco Victor Amoroso; Cristine Aser; Ann Villalobos; Rainear Mendez; Domingo Lodevico; Gina Barbosa
Journal of Tropical Life Science Vol. 12 No. 1 (2022)
Publisher : Journal of Tropical Life Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/jtls.12.01.08

Abstract

Ficus pseudopalma Blanco is an endemic Philippine plant with many medicinal uses and ethnobotanically as green vegetable or side dish. With these several economic uses of the plant, there is a need to investigate the morpho-anatomy and development of the species. Seeds of F. pseudopalma were collected in Mt. Hamiguitan Range Wildlife Sanctuary and grown in the Central Mindanao University Garden to monitor the growth and development of the species. Unique morpho-anatomical features were observed during its vegetative and reproductive development. Insights on the development of the syconia and seed formation are elucidated.
In Silico Study of Eugenol and trans-Caryophyllene also Clove Oil Fumigant Toxicity on Tribolium castaneum: In Silico Study and Fumigant Toxicity of Clove Oil Silvi Ikawati; Toto Himawan; Abdul Latief Abadi; Hagus Tarno; Alvan Fajarudin
Journal of Tropical Life Science Vol. 12 No. 3 (2022)
Publisher : Journal of Tropical Life Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/jtls.12.03.07

Abstract

Alternative storage pest control that is more environmentally friendly than the use of synthetic chemical pesticides is to use botanical pesticides from plant essential oils, including clove (Syzygium aromaticum) which contains the main compounds eugenol and trans-caryophyllene. To study the various mechanisms of action of essential oils as botanical insecticides could use in silico approach through molecular docking. This study aims to predict the dominant binding mode(s) of a ligand with a protein of a known three-dimensional structure through docking. Then tested its fumigant activity on Tribolium castaneum. The docking results showed that the trans-caryophyllene and eugenol compounds had a more stable bond strength in the acetylcholinesterase enzyme T. castaneum than the control compound linalool. In addition, there is a synergy between eugenol and trans-caryophyllene when the two compounds interact with acetylcholinesterase. These results can be used as prediction material that trans-caryophyllene and eugenol have potential as protein acetylcholinesterase inhibitors of T. castaneum. After being tested in the laboratory, clove oil which contains two main compounds namely eugenol and trans-caryophylene has the potential to control T. castaneum with an LC50 value of 5,227 μL/L air. Keywords: Botanical insecticide, Caryophyllene, Docking, Eugenol, Fumigant,Syzygium aromaticum
In Silico Molecular Characterization of a Putative Haloacid Dehalogenase Type II from Genomic of Mesorhizobium loti Strain TONO: In Silico Molecular Characterization of a Putative Haloacid Dehalogenase Type II Sefatullah Zakary; Hamida Mashal; Abdul Rahman Osmani; Habeebat Adekilekun Oyewus; Fahrul Huyop; Muzhgan Mohammad Nasim
Journal of Tropical Life Science Vol. 12 No. 2 (2022)
Publisher : Journal of Tropical Life Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/jtls.12.02.10

Abstract

Halogenated organic compounds are found as waste in the biosphere and can causenumerous dilemmas because of their toxicity and persistence in the environment. Theyplay a major role in the quality of life of both, human beings and other living organisms. Degradation of these compounds by microorganisms is significant to reduce recalcitrant and cost. Thus, in the current study, an in-silico approach was used for homology modelling and docking assessment of a newly identified DehLt4, type IIdehalogenase to predict its ability to degrade selected haloalkanoic acids and haloacetates. The study aimed to establish the catalytic tendencies of the enzyme to optimallydegrade the selected halogenated haloacids. The refined modelled structure of DehLt4using GROMACS 5.1.2 software revealed satisfactory scores of ERRAT (94.73%),Verify3D (90.83%) and PROCHECK (99.05 %) assessments. Active site predictionby blind docking and multiple sequence alignment indicated the catalytic triads forDehLt4 were Asp9-Lys149-Asn175. Both L-2-chloropropionic acid (L-2-CP) and trichloroacetate (TCA) docked with DehLt4 exhibited binding energy of -3.9 kcal/mol.However, the binding energy for D-2-chloropropionic acid (D-2-CP) and monochloroacetate (MCA) was -3.8 kcal/mol and -3.1 kcal/mol, respectively. Thus, the findingsof the study successfully identified the catalytic important residues of DehLt4 for possible pollutant degradation. The in-silico study as such has a good potential for characterization of newly identified dehalogenases based on basic molecular structure andfunctions analysis.Keywords: Dehalogenase, Haloacid dehalogenase, Mesorhizobium loti strain TONO,Protein structure
Effect of Different Plant Growth Regulators on Micropropagation of Some Pitaya Varieties : Micropropagation of Some Pitaya Varietie Taner Bozkurt; Sezen Inan; Ijlal Dundar; Selda Kozak
Journal of Tropical Life Science Vol. 12 No. 2 (2022)
Publisher : Journal of Tropical Life Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/jtls.12.02.04

Abstract

Pitaya belongs to the family Cactaceae and the genus Hylocereus. It is essential todevelop tissue culture protocols according to the appropriate variety to spread pitayacommercial production and ensure healthy sapling production. This study aimed todetermine the best plant growth regulators (PGRs) in the micropropagation process,and their effects on different pitaya cultivars were evaluated. Shoots of different pitayacultivars were cultured in Murashige and Skoog (MS) basal medium supplementedwith Indole-3-butyric (IBA), 6-benzyl amino purine (BAP), and gibberellic acid(GA3). The highest micropropagation coefficient was determined in Physical Graffitivariety cultured in MS medium supplemented with 2 mg/L BAP. The general evaluation based on the variety determined that the best micropropagation was in the RoyalRed variety. In in vitro rooting studies, the best rooting variety was Royal Red(54.47%), followed by Siam Red (50.33%), Physical Graffiti (47.75%), and SeoulKitchen (44.82%). It was determined that the Royal Red variety is grown in R2 (MSmedium supplemented with 1 mg/l IBA) medium gave the best results in all criteriaof shoot length (4.28 cm), root length (6.45 cm), and root formation on the face(74.48%). It was envisioned that these differences between the micropropagation,growth, and rooting of the cultivars used in the studies resulted from the cultivar characteristics.Keywords: Pitaya, In vitro, Micropropagation, Royal Red, Seoul Kitchen, Siam Red,Physical Graffiti

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