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INDONESIA
Jurnal Biologi Tropis
Published by Universitas Mataram
ISSN : 14119587     EISSN : 25497863     DOI : -
Core Subject : Science, Agriculture,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Immunology & microbiology
Jurnal Biologi Tropis (ISSN Cetak 1411-9587 dan ISSN Online 2549-7863) diterbitkan mulai tahun 2000 dengan frekuensi 2 kali setahun oleh Program Studi Pendidikan Biologi PMIPA FKIP Universitas Mataram, berisi hasil penelitian dan ulasan Ilmiah dalam bidang Biologi Sains.
Arjuna Subject : -
Articles 2,520 Documents
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Antifungal Activity Test of Jamaican Cherry Leaf (Muntingia calabura l.) Ethanol Extract in Inhibiting Growth of Fungi Malassezia furfur and Pityrosporum ovale Khairani, Tetty Noverita; Neswita, Elfia; Nurasni, Nurasni; Fitri, Khairani; Amanda, Asri
Jurnal Biologi Tropis Vol. 25 No. 3 (2025): Juli-September
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v25i3.9510

Abstract

The plant species known as Jamaican Cherry Leaf (Muntingia calabura L.) belongs to the Muntingiaceae family. Flavonoid compounds, tannins, saponins, and steroids are all found in Jamaican cherry leaves. One of them has antifungals that can stop Pityrosporum ovale and Malassezia furfur from growing, and it is utilized as a traditional medication. This study aimed to determine the antifungal activity and the most effective concentration of Jamaican cherry leaves in inhibiting the growth of Malassezia furfur and Pityrosporum ovale fungi. Methods research is an experimental research. The research phase includes sampling, making simplicia, extract making, testing the characteristics of simplicia and extract, testing the inhibitory power of ethanol extract of Jamaican cherry leaf against fungi (Malassezia furfur and Pityrosporum ovale) by comparing the 2% ketoconazole antibiotic. The results showed the inhibition of ethanol extract of Jamaican cherry leaf (Muntingia calabura L.) against the growth of Malassezia furfur at F1 (7.2 mm), F2 (9.8 mm), F3 (11 mm) with and F4 (6.8 mm). mm) while against the growth of the fungus Pityrosporum ovale at F1 (7.0 mm), F2 (9.11 mm), F3 (10.2 mm) and F4 (6.3 mm). The best inhibition zone was formed at 30% concentration treatment with strong category. The conclusion shows that the ethanol extract of Jamaican cherry leaf (Muntingia calabura L.) can inhibit the growth of Malassezia furfur and Pityrosporum ovale fungi.
Bio-Reclamation Evaluation of Former Gold Mine Land: Pre- and Post-Reclamation Soil Management Conditions Nuriman, Muhammad; Wibowo, Sigit Sapto; Rezekikasari, Rezekikasari; Agustine, Leony; Setiawati, Tia
Jurnal Biologi Tropis Vol. 25 No. 3 (2025): Juli-September
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v25i3.9519

Abstract

Former gold mining land, especially those abandoned without reclamation, experiences serious physical, chemical, and biological degradation, and is potentially contaminated with heavy metals such as mercury (Hg). This study aims to evaluate the effectiveness of organic farming-based bioreclamation and good soil management, using dwarf elephant grass (Pennisetum purpureum) and chicken manure in improving the condition of former gold mining land. The parameters analyzed include physical, chemical, and biological properties of the soil, as well as mercury levels in the soil and plants. The results showed that the soil quality index increased from 0.32 (low) to 0.62 (good). The organic C content increased from 0.91% to 2.16%, soil pH increased from 3.53 to 5.03, and the availability of phosphorus and potassium also increased. The population of methyl mercury-reducing bacteria increased 22.4 - 58.2 times, indicating improved microbial adaptation to the environment. Mercury content in plant tissue decreased drastically from 11.60 mg/kg to 0.11 mg/kg or a decrease of 99.05%, although still slightly exceeding the threshold. The conclusion is that reclamation with an organic approach and effective soil management not only improves soil fertility and quality, but also reduces the risk of heavy metal poisoning.
The Effect of Feeding Different Brands of Shrimp (Fengli-Kaiohji) on the Survival of Vanami Shrimp Seeds in Nursery Ponds Ahmad, Syirojuddin; Aminin, Aminin
Jurnal Biologi Tropis Vol. 25 No. 3 (2025): Juli-September
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v25i3.9525

Abstract

This study aimed to analyze the effect of feeding different brands of animal feed, namely Fengli and Kaiohji, on the survival of vanami shrimp seeds during the ponding process. The methods used included observation of water quality (pH, salinity, temperature) and calculation of shrimp seed survival in ponds with a size of 10 m x 6 m and a stocking density of 500,000 fish/field. Feeding was done routinely at the rate of 500 grams per day for 8 days with different treatment patterns in each pond. The results showed that feeding with Fengli brand gave a higher survival rate of shrimp seeds than Kaiohji brand. During eight days of nursery, the water pH naturally decreased from 7.5–7.6 to 7.1–7.2 due to the accumulation of metabolite residues, feed, and microorganism activity. Despite the decrease, the pH remained within the optimal limits (7.0–8.5) for whiteleg shrimp seeds. The water temperature was stable at 29–30°C, supporting the growth and metabolism of larvae. The highest survival rate was obtained in treatment A1 (Fengli) at 70%, while the highest from Kaiohji was B3 with 61% survival. This study provides recommendations for the selection of appropriate feed to improve the survival of vanami shrimp seeds in the ponding process.
Phytochemical Screening of Suji (Pleomele angustifolia) Extract Bahri, Syamsul; Setiadi, Dadi; Lestari, Tri Ayu; Setiawan, Heru; Hakim, Muhammad Alfianul; Cahyadi, Lalu M. Zidan
Jurnal Biologi Tropis Vol. 25 No. 2 (2025): April-Juni
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v25i2.9560

Abstract

Phytochemical screening of Suji (Pleomele angustifolia) extract has been conducted. The aim of this research is to identify compounds and determine the antioxidant activity of suji  extract. The method used is laboratory experiments for phytochemical screening and antioxidant activity testing. This research consists of 2 (two) stages. The first stage aims to obtain extract of suji by using ethanol plus ethyl acetate and the second stage is carried out to test the content of secondary metabolite compounds using phytochemical tests and determine the antioxidant activity of extract of suji using the DPPH method. The extract of suji positively contains terpenoids, whereas flavonoid and  alkaloids are detetcted in a significant number. The DPPH test results obtained the equation y = 0.3492x + 12,059, indicating that the antioxidant activity of suji extract of  is classified as moderate as the IC50 value of the extract of suji is108,65 ppm
Analisys of Lead Content in Rice Snail from Taliwang Lake Khairuddin, Khairuddin; Yamin, M.
Jurnal Biologi Tropis Vol. 25 No. 1 (2025): Januari - Maret
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v25i1.8810

Abstract

The aim of the study was to determine the content of Lead (Pb) in the Rice Field Snail (Pila ampullacea) from Taliwang Lake. The special benefit is to protect consumers who consume Snail from Pb contaminant. The research was conducted in water body of Taliwang Lake. The Eastern and western parts of the lake were taken to be 2 research stations. Small nets and tweezers are used to sample 20 snails for each station. Furthermore, each snail sample was put into a plastic bag and then stored in a sample box. The research sample was then analyzed at the Environmental Laboratory Center for the West Nusa Tenggara Environment and Forestry Office. The method of data analysis was carried out by taking muscle tissue from snails and then analyzing the content of Pb heavy metals by using an Atomic Absorption Spectrophotometer. Lead concentrations in snail tissue were measured after adding concentrated Na2SO4 and CuSO4, which were heated at 350ºC for 2-3 hours until the solution was clear. The conclusion of this study is that the content of Pb in Rice field snails (Pila ampullacea) was 0.01 ppm.  
Polyploid Induction of Long Bean (Vigna sinensis) Using Colchicine with Different Concentrations Fitri, Anisa; Afandi, Echa Azkia; Anggun, Septiasri; Yuni Ahda
Jurnal Biologi Tropis Vol. 25 No. 3 (2025): Juli-September
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v25i3.9063

Abstract

Long bean (Vigna sinensis) is a plant from the Leguminosae family, which has an important role in the Indonesian economy because it is widely consumed as food. The purpose of this research is to utilize mutation technology in supporting plant breeding to produce superior long bean varieties. The research method carried out was a non-factorial Randomized Group Design (RAK), namely soaking the seeds of long bean plants with colchicine to see the effect of colchicine treatment on chromosomal mutations in long bean plants. The results showed significant differences between colchicine concentrations of 0.02% and 0.03%. At a concentration of 0.02%, the cell nucleus appeared solid red and in the center of the cell, but the number and shape of chromosomes were not clearly visible. This concentration is not optimal for inducing polyploidy. Meanwhile, at a concentration of 0.03%, the chromosomes were more clearly visible than the previous concentration.
Fertilizer Treatment on Postharvest Appearance of White Radish Tubers in Drip Irrigation System Desianti, Sabrina; Inti Mulyo, Arti; Risnawati, Risnawati; Julio Aria, Nugraha
Jurnal Biologi Tropis Vol. 25 No. 3 (2025): Juli-September
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v25i3.9207

Abstract

Appearance tends to influence consumer judgement including appearance, size, dimensions, yield and hardness of agricultural products. This study aims to observe the appearance, length, diameter, yield and texture of postharvest white radish tubers due to fertilizer treatment in drip irrigation system. The study used a 2-factor Randomised Complete Block Design (RCBD). The first factor was NPK festiliser with concentrations of 0 kg/ha (N0), 400 kg/ha (N1), and 700 kg/ha (N2). The second factor was cow manure fertilizer at 0 tonnes/ha (P0), 15 tonnes/ha (P1) and 30 tonnes/ha (P3). Data were analyzed using ANOVA test, and DMRT 0,5% follow-up test. Parameters observed besides appearance were length, diameter, yield and texture of white radish tubers. The results showed that the appearance of white radish tubers tended to be influenced by the growing environment. NPK fertilizer had a significant effect on the length and very significant effect on the diameter of white radish tubers. Cow manure fertilizer had a significant effect on the diameter of white radish tubers. The interaction of the two factors had no significant effect on all parameters observed.
The Comparison of IC50 of Suji (Pleomele angustifolia) which is Extracted by Different Solvent Bahri, Syamsul; Setiadi, Dadi; Lestari, Tri Ayu; Setiawan, Heru; Hakim, Muhammad Alfianul; Cahyadi, Lalu M. Zidan
Jurnal Biologi Tropis Vol. 25 No. 2 (2025): April-Juni
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v25i2.9559

Abstract

The Determination both of IC50 of Suji (Pleomele angustifolia) and its phytochemical subtances content which extracted by a different solvent has been conducted. The aim of this research is to determine kind of solvent which achieve better result. The method used is laboratory experiments for phytochemical screening and antioxidant activity assay. This research consists of 2 (two) stages. First stage aims to obtain extract of suji by using certain solvent, and the second stage is carried out to examine  secondary metabolite compounds of the extract using phytochemical screening and then to determine the antioxidant activity of extract using the DPPH method. This research used  2 kinds of solvent, ethanol plus ethyl acetate in the first sample, and the second one by ethanol only. Sample which extracted by ethanol plus ethyl acetate positively contains terpenoids, whereas flavonoid and  alkaloids are detected in a significant number. The DPPH test results obtained the equation y = 0.3492x + 12,059, indicating that the antioxidant activity of suji which extracted by ethanol plus ethyl acetate is classified as moderate as the IC50 value of the extract of suji is108,65 ppm. The other sample which extracted just by ethanol also contains terpenoid, flavonoid, and alkaloid, but in a greater number. In the second sample also detected steroid compound which undetectable in the first sample. DPPH score in the second sample which extracted  by ethanol. is y= 06352x + 18, 786. By using this equation we found 49.14 ppm as IC50 score. This score is classified as strong activity. This result shows that antioxidant activity of the second extract is stronger than the first one. The result also meaning that ethanol is more effective in extracting phytochemical compounds of suji than ethanol plus ethyl acetate.
Species Diversity of Shrimp Caught by Fishermen in the Buffer Zone of East Cost Mangrove Forest Nature Reserve, Jambi Province Savitri, Ema; Nugraha, Anggit Prima; Hombing, Desi Natalia; Atika, Siti; Firdaus, Wildani
Jurnal Biologi Tropis Vol. 25 No. 3 (2025): Juli-September
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v25i3.8854

Abstract

Buffer zone is an area surrounding a nature reserve that serves to protect the inner ecosystem from external influences. The East Coast Mangrove Forest Reserve is a nature conservation area  located in Jambi Province. Both in the waters of Mendahara Ilir and Nipah Panjang, which are focused on preserving mangrove forest ecosystems. The method used is exploratory description and interviews with fishermen. The results obtained show that there are 11 speciesof shrimp found in the East Coast Mangrove Forest Reserve Area, namely: Galah Shrimp (Macrobrachium rosenbergii), Ketak Shrimp (Harpiosquilla raphidea), Hanging Shrimp (Macrobrachium nipponense), Striped Shrimp (Parapenaeopsis sculptilis), Peci Shrimp (Penaeus merguiensis), Lime Shrimp (Metapenaeus dobsoni), Agogo Shrimp (Penaeus indicus), Uka Shrimp (Metapenaeus brevicornis), Spur Shrimp (Palaemon styliferus), Ube Shrimp (Metapenaeus tenuipes) and Swallow Shrimp (Metapenaeus affinis). From the research that has been done, the data obtained that the speciesof shrimp in Nipah Panjang are more than the speciesof shrimp in Mendahra Ilir Village. One of the factors that cause differences in catches is the type of fishing gear used.
Isolation and Characterization of Bacteria from Siam Citrus Leaves with Scab Symptoms Mela, Mela; Rahmawati, Rahmawati; Mukarlina, Mukarlina
Jurnal Biologi Tropis Vol. 25 No. 3 (2025): Juli-September
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v25i3.8908

Abstract

Scab disease on leaves can reduce Siam citrus production. Aims of this study is determine the genus of bacteria in rhizosphere against bacteria isolated from scabies symptomatic. The research has been carried out in the Microbiology Laboratory, Department of Biology, Faculty of Mathematics and Natural sciences, Universitas Tanjungpura. Characterization was carried out morphologically and physiologically. The macromorphology observed is shape, edges, color and elevation. The micromorphological characters observed were shape, arrangement, color and gram type. The physiological characters observed were urease, glucose, lactose, sucrose, catalase, citrate, MR, ornithin, indole, motility, type of fermentation and H²S formation. The results of the isolation obtained 3 genus are Xylophilus sp. (BKS 1), Burkholderia sp. (BKS 2) dan Xylophilus sp. (BKS 3).The bacterial genus isolation results obtained can be used for antagonistic testing with other bacteria.

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