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INDONESIA
Journal of Tropical Biodiversity and Biotechnology
Published by Universitas Gadjah Mada
ISSN : 25409573     EISSN : 25409581     DOI : -
Core Subject : Science, Agriculture, Social,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Environmental Science Immunology & microbiology
Journal of Tropical Biodiversity and Biotechnology (JTBB) is an authoritative source of information concerned with the advancement of tropical biology studies in the Southeast Asia Region. It publishes original scientific work related to a diverse range of fields in tropical biodiversity, functional biology, and biotechnology.
Arjuna Subject : -
Articles 327 Documents
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Nannoplankton Biostratigraphy from Banggai-Sula Basin, Central Sulawesi Nurhidayah, Efrilia Mahdilah; Akmaluddin, Akmaluddin; Barianto, Didit Hadi; Husein, Salahuddin; Saripudin, Asep
Journal of Tropical Biodiversity and Biotechnology Vol 9, No 1 (2024): March
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jtbb.85308

Abstract

The nannoplankton research was conducted in the MH-2 well, Banggai-Sula Basin, Central Sulawesi. Thirty-four ditch-cutting samples were utilized to observe the Minahaki, Kintom, and Biak Formations. Age determination was carried out using biostratigraphy method and standard procedure for first and last occurrence of nannoplankton biodatum and had an absolute age, widely known as a zone indicator.  This study aims to determine the age and nannoplankton biozonation of each geological formation in Banggai-Sula Basin. Based on the biostratigraphic analysis, 39 species from 14 genera with abundance frequencies ranging from rare to abundant were found in the MH-2 well. In this study, new results of the age of Banggai-Sula Basin areMiddle Miocene – Early Middle Pliocene (13,706 – 3,727 Ma), and can identify into six calcareous nannoplankton zones that are more detailed than previous researchers, Discoaster signus zone (NN5), Discoaster exilis zone (NN6-NN7), Discoaster berggrenii zone (NN11), Ceratolithus acustus zone (NN12), Helicosphaera sellii zone (NN13-NN15), and the Discoaster tamalis zone (NN16). Biostratigraphic data also shows new information for the first time, the absence of three zones from zone NN8 to zone NN10. This result indicates an unconformity in the Late Miocene age (10.606–8.20 Ma). 
Diversity of Actinomycetes Isolated from Peat Soil of Undistrubed Forest and Pineapple Plantation in Sessang, Sarawak Heng, Jeffrey Lim Seng; Hamzah, Halizah; Nejis, Norzaimawati Aman
Journal of Tropical Biodiversity and Biotechnology Vol 9, No 2 (2024): June
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jtbb.85390

Abstract

Peatland plays an important role not just as a carbon store but also in facilitating the flux of greenhouse gasses into the atmosphere. Apart from that, peatland is also home to a diverse population of microorganisms such as bacteria, fungi, and actinomycetes. Actinomycetes were known to be one of the most ubiquitous microbes that can be found in most of the soil types including peat soil. In this study, seventy isolates of actinomycetes were isolated from the peat soil using the soil dilution method. The 70 isolates of actinomycetes were later screened for their ability to produce secondary metabolites and antimicrobial activities using the agar diffusion method before the selected potential isolates were identified by targeting their 16S rRNA region. The results obtained showed 34.3% produce cellulase followed by, 12.8, 31.7, 80.0, and 51.4% for mannanase, xylanase, lipase, and protease respectively. The percentage of actinomycetes producing antimicrobial activity was 27.1 and 21.4% for Ralstonia solanacearum and Colletotrichum gleosporioides respectively. All the selected isolates of actinomycetes were identified as belonging to the genus of Streptomycetes spp. The potential actinomycetes were stored in freeze-dried form for future usage. This study showed that  more diverse population of actinomycetes was obtained from the undisturbed forested peat soil area ecosystem compared to the agricultural peat soil area. 
Herpetofauna and Their Potential Threats in Karimata Island, Indonesia Pratama, Ferdian Wira; Fauzan, Opi; Luthfi, Muhammad
Journal of Tropical Biodiversity and Biotechnology Vol 9, No 3 (2024): September
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jtbb.85535

Abstract

Karimata Island is an island about 100 km west of Borneo, causes geographical isolation and generally always shows an impact on the diversity of animal communities that are less, one of the communities affected is herpetofauna. Herpetofauna is very important in an ecosystem so it is necessary to conduct a survey. The survey was conducted from April 1 to April 7, 2023 in Betok Jaya Village, Karimata Island which was divided in 3 observation areas based on habitat type using the Visual Encounter Survey method. Herpetofauna found consisted in 22 species divided into 5 species of amphibians and 17 species of reptiles with a total of 43 individuals. Herpetofauna located adjacent to human areas is vulnerable to various disturbances such as maritime transportation activities, household waste pollution and land clearing, which can be a threat to the herpetofauna community of Karimata Island. 
Therapeutic Effects of BRC Functional Food from Indonesian Black Rice on Body Weight and Haematological Parameters in Obese Rats Sofyantoro, Fajar; Syam, Adi Mazdi; Adania, Baik Aisyah; Almunawar, Muhammad Fikri; Nasution, Nurlita Putri Bela; Hidayat, Rheina Faticha Asyamsa; Mataram, Made Bagus Auriva; Maharesi, Chesa Ekani; Nurhidayah, Septika; Purwestri, Yekti Asih; Nuriliani, Ardaning; Hidayati, Lisna; Pratiwi, Rarastoeti
Journal of Tropical Biodiversity and Biotechnology Vol 9, No 1 (2024): March
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jtbb.85847

Abstract

Obesity increases the risk of various diseases. Black rice, renowned for its high anthocyanin content, is considered a potential functional food for preventing metabolic disorders. The current study investigated the effects of black rice crunch (BRC) on body weight and haematological profiles in obese rats. Rats were fed with high-fat diet to induce obesity and supplemented with different concentrations of BRC for 4 and 8 weeks. The results showed that high-fat diet effectively induced obesity, as evidenced by significant increase in body weight. Importantly, 75% BRC supplementation resulted in significant weight reduction in obese rats. Further analysis revealed an increase in erythrocyte numbers in obese groups supplemented with 75% BRC, but no significant changes in haemoglobin concentration or haematocrit percentage. Further investigation showed that 75% BRC led to a decrease in mean corpuscular haemoglobin (MCH), mean corpuscular haemoglobin concentration (MCHC), and mean corpuscular volume (MCV), potentially affecting the size and concentration of haemoglobin within erythrocytes. The total leucocytes count increased with the high-fat diet, while BRC supplementation alone did not have significant impact. Lymphocyte percentage remained stable across the groups, indicating minimal influence of the dietary interventions. Neutrophil percentage varied initially but was not specific to BRC or the high-fat diet. Platelet count and distribution width were not significantly influenced, but mean platelet volume (MPV) increased after 8 weeks of BRC treatment, suggesting larger platelet sizes associated with obesity. Overall, the study provides important insights into the effects of BRC supplementation on body weight and haematological parameters related to obesity. 
Major Royal Jelly Protein 2 (mrjp2) Gene Detection in Apis dorsata Fabricius, 1793, Apis dorsata binghami Cockerell, 1906, Apis florea Fabricius, 1787, and Apis nigrocincta Smith, 1860 Dewi, Yasinta; Purwanto, Hari
Journal of Tropical Biodiversity and Biotechnology Vol 9, No 2 (2024): June
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jtbb.85987

Abstract

Indonesian people’s interest in honey, the product from honey bees, is quite high. It caused many cases of honey fraud such as mislabelling the entomological origin of honey. The Major Royal Jelly Protein 2 (mrjp2) gene, which encodes MRJP, can be used to determine the entomological origin of honey. The mrjp2 gene, for example, can be detected in honey from A. mellifera and A. cerana using species-specific primers for A. mellifera (MF-MR) and A. cerana (CF-CR). This study aims to detect the mrjp2 gene in several honey bee species native to Indonesia, namely A. dorsata, A. dorsata binghami, A. florea, A. nigrocincta, A. mellifera, and A. cerana as well as analyse the feasibility of MF-MR and CF-CR primers in determining the entomological origin of honey. The results showed that the MF-MR primers can amplify the DNA of A. dorsata binghami, A. florea, and A. mellifera, while CF-CR primers can amplify the DNA of both A. nigrocincta and A. cerana. The amplicons were subsequently sequenced. The phylogenetic tree and the genetic distance showed that there were differences and variation between each species of honey bee samples with the honey bee database. The data obtained from this research indicated that both primers could not determine the entomological origin of honey directly up to species level. The species level determination will only be possible using sequences information. However, in certain situations, the MF-MR and CF-CR primers were able to differentiate the honey bee species by including the information of the geographical origin of honey sample and the distribution area of each species of honey bees in Indonesia. 
The Diversity of Ants (Hymenoptera: Formicidae) on Industrial Forest in Sungai Merah Village, Sarolangun, Jambi with Its Identification Key Fitriyani, Nur Laras; Soesilohadi, RC. Hidayat; Purwanto, Hari
Journal of Tropical Biodiversity and Biotechnology Vol 9, No 3 (2024): September
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jtbb.86022

Abstract

Ants have a very important role in an ecosystem. The insects act as decomposers, pollinators, soil aerators, pest controllers, and predators. Their role is very varied so that they can be easily found in various ecosystems, one of which is the rubber and oil palm ecosystem. The ant’s diversity in this forest eventually will affect the productivity of the land. The aim of this study is to determine the diversity and role of ants in the rubber and oil palm plantations in Sungai Merah Village. Both of the plantations dominate the industrial forest in Jambi. The method used in this study was purposive random sampling. Observation plots were installed in the ecosystem of rubber and oil palm plantations; each ecosystem had 4 plots consisting of 9 units of pitfall traps, and 9 units of bait traps. The results of this study show that 15 species of ants are found in the ecosystem of rubber and oil palm plantations. Furthermore, the collected ants consisted of 39.972 individual ants belonging to 12 genera and 5 subfamilies. Ants establish in the ecosystem of rubber and oil palm plantations in Sungai Merah Village have an important role either as predators (Crematogaster spp., Odontomachus rixosus, Odontoponera tranversa, Pheidole huberi, Tetraponera rufonigra, Tapinoma melanocephalum, Camponotus spp. and Colobopsis moeschi), or foragers such as ants from the genera Anoplolepis, Camponotus, Monomorium and Polyrhachis. As predators, Oecophylla smaragdina, Camponotus spp. and Crematogaster spp. also play a role as biological control agents in the ecosystem. 
Lead (Pb)-Resistant Bacteria Improve Brassica chinensis Biomass and Reduce Pb Concentration in Pb-Contaminated Soil Pertiwi, Beauty Laras Setia; Ustiatik, Reni; Nuraini, Yulia
Journal of Tropical Biodiversity and Biotechnology Vol 9, No 1 (2024): March
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jtbb.86174

Abstract

Applications of inorganic fertilisers  and pesticides frequently increase lead (Pb) content in the soil and food crops. This study aims to isolate Pb-resistant bacteria and test the isolated bacteria in reducing Pb concentration and increasing biomass production of Brassica chinensis on Pb-contaminated soil.  Soil and plant samples were collected from agricultural land in Batu City, East Java, Indonesia. The isolated bacteria were tested for Pb resistance and then characterised  according to 16S rRNA Sequence. A pot trial with a completely randomised  block design consisting of 9 treatments and 3 replications was set to determine the effect of Pb-resistant bacteria inoculation on Pb residue, plant growth, and soil nutrients. The result showed that the isolated Pb-resistant bacteria were Bacillus wiedmannii and Bacillus altitudinis. The bacteria were resistant to Pb up to 10,000 mg/L PbNO3. Inoculation of the bacteria increased B. chinensis growth and biomass production, namely increasing the number of leaves (12%) and dry weight (35%).  Also, the bacteria reduced Pb residue in the soil by up to 88%. Moreover, soil essential nutrients such as total nitrogen, available phosphorus, and exchangeable potassium increased (12%, 73%, and 200%, respectively) after the application of Pb-resistant bacteria. The bacteria have the potential for bioremediation of Pb-contaminated soils on a large scale due to the bacteria prevent Pb uptake by food crops such as B. chinensis by reducing Pb content in the soil, which is good for food safety and environmental sustainability. 
Growth and Development of Winged Bean (Psophocarpus tetragonolobus (L.) DC.) Treated with Paclobutrazol Wijayanti, Jihan Sekar; Dewi, Kumala
Journal of Tropical Biodiversity and Biotechnology Vol 9, No 2 (2024): June
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jtbb.86238

Abstract

Winged bean (Psophocarpus tetragonolobus (L.) DC.) is one of the tropical legumes commonly grown for vegetable in Indonesia. Winged bean is a kind of plants that growth on vine so that for cultivation it requires stakes or awnings. It is known that paclobutrazol is a growth retardant that acts by inhibiting gibberellin biosynthesis and application of paclobutrazol could make plant become semidwarf or even dwarf. This study was aimed to evaluate the effect of paclobutrazol on growth, development, some phytochemicals content and yield of winged bean plants. This study used a Completely Randomized Design (CRD) with one factor, namely paclobutrazol, which was applied at four different concentrations, namely 0 ppm (control), 25 ppm, 50 ppm, 75 ppm or 100 ppm. Three replicates were made for each treatment. The results showed that paclobutrazol significantly decreased plant height, number of leaves, leaf area, number of pods per plant, pod length, fresh weight of fruit, levels of vitamin C and protein in the pods, but increased the leaf chlorophyll content and stomata density on the abaxial (lower) leaf surfaces. Paclobutrazol showed its effect on accelerating flowering time at a concentration of 50 ppm.  
Detection of Entomological Origin of Honey Sold in Indonesia Based on 16S rRNA Gene Analysis Indahsari, Anita Nur; Purwanto, Hari
Journal of Tropical Biodiversity and Biotechnology Vol 9, No 3 (2024): September
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jtbb.86256

Abstract

Honey is known for its various benefits for health, cosmetic ingredients, and other industrial materials. Especially, during the Covid-19 pandemic, many people consume honey to maintain body endurance. In Indonesia, the honey produced is dominated by Apis mellifera honey. With a cheaper price and a larger quantity, A. mellifera honey is often offered as forest honey or stingless bee honey to get more profit. Therefore, this study aims to determine the entomological origin of honey claimed as forest honey and stingless bee honey sold in the Indonesian market using the detection of 16S rRNA gene amplicon. This study tested 30 samples of forest honey and 30 samples of stingless bee honey. DNA that has been isolated from honey samples was amplified by PCR using 16S rRNA primers. The results from the sequence analysis showed that nine of honey samples were identified as honey fraud. Two samples were confirmed as falsification of the origin of honey-producing bees and four honey samples were confirmed as honey mislabelling. From this study it can be concluded that, it is possible to determine the entomological origin of honey molecularly by sequencing the 16S rRNA gene. Therefore, this method can be used to identify honey fraud that may occur on the market. 
First Report on Wild Occurrences of Phoenix Mushroom (Pleurotus pulmonarius Fr. Quél.) in Indonesia Putra, Ivan Permana; Nurhayat, Oktan Dwi; Sibero, Mada Triandala; Hermawan, Rudy
Journal of Tropical Biodiversity and Biotechnology Vol 9, No 1 (2024): March
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jtbb.86455

Abstract

The genus Pleurotus is known as a commercially important mushroom and one of the most well-known cultivated mushrooms worldwide. Of many species of Pleurotus, the phoenix mushroom (P. pulmonarius) is cultivated in many countries, including Indonesia. In Indonesia, the farmers and larger companies usually use commercial strains of phoenix mushroom which they purchased from other countries. To date, there was no prior information regarding wild occurrences of P. pulmonarius in Indonesia. During our regular mushroom hunting in Sukabumi, West Java, Indonesia, some edible wild fruiting bodies of light brown Pleurotus were collected. The current study aimed to determine the taxonomical position of our specimens based on morphological and molecular evidence. The combination of morphological and molecular analysis confirmed our specimens as P. pulnonarius. Morphologically, our specimens were distinguished by the small to medium sized fruiting bodies, pileus light brown, pinkish brown, to pale brown, flabelliform in the beginning to expanding broadly ovoid in maturity, lamellae shortly to deeply decurrent, stipe fleshy, eccentric to lateral, concolorous with lamellae, Basidiospores cylindrical to ellipsoid, basidia clavate to club shaped, basidioles are abundant, oleiferous hyphae common. The BLAST result revealed that our specimens posed a high similarity to P. pulnonarius from several countries as the top hits. The ITS phylogenetic tree placed Pleurotus FIPIA-DEP51 in the same clade of P. pulnonarius with 100% BS value. This study reports for the first time the wild occurences of P. pulmonarius in Indonesia. Future study should be done to characterize the cultures of reported mushroom which can potentially be the local strain for cultivation of P. pulmonarius industry in Indonesia. 

Page 28 of 33 | Total Record : 327

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