cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
-
Contact Email
-
Phone
-
Journal Mail Official
-
Editorial Address
-
Location
Kota mataram,
Nusa tenggara barat
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 2,562 Documents
 97   98   99   100   101 
Callus Induction of Ciangir Passion Fruit (Passiflora sp.) Leaves at Several Concentration Levels of Growth Regulators Substance 2,4-D and BAP Putri, Salma Sasyana; Susiyanti; Muztahidin, Nur Iman; Isminingsih, Sulastri
Jurnal Biologi Tropis Vol. 24 No. 1 (2024): 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.v24i1.6454

Abstract

Passion fruit plants are important economically due to the high nutrient value of the fruit, and they have an important role in the pharmaceutical world. People often exploit passion fruit plants for medicinal purposes without cultivating them. Passion fruit propagation can be done using seeds, grafting, or cuttings. However, such propagation can increase the value of high genetic variability so that to overcome this can be done by propagating passion fruit seedlings in tissue culture by callus induction. This research was carried out to determine the effect of 2,4-D and BAP on callus induction in passion fruit leaves. The method utilized was a factorial Randomized Group Design (RGD), which consisted of two factors, namely the 2,4-D concentration level (0, 1, 2, 3) ppm and the BAP concentration level (0, 1, 2) ppm, so there were 12 treatment combinations which were repeated three times. The observed parameters were callus area, percentage of browning explants, percentage of living explants, percentage of callus explants, color and texture of callus. The concentration level of 2,4-D 3 ppm and BAP 0 ppm best affected the callus area parameter of 1.96 . The results of this research showed that the percentage of the highest living explants achieved 100%, the percentage of contaminated explants was 0%, the percentage of explants that experienced browning was 66%, and the percentage of explants that experienced callus was 100%, yellowish green in color of callus, and callus texture is crumbly, compact, intermediate. The research should focus on callus induction with other growth regulators.
Hepatic Alteration due to Formaldehyde Exposure on Wistar Rats (Rattus norvegicus) Makbul, Hidayat; Wedayani, Anak Agung Ayu Niti; Punagi, Abdul Qadar; Pieter, Nova Audrey Luetta; Cangara, Muhammad Husni; Lestarini, Ima Arum; Restuningdyah, Novia Andansari Putri
Jurnal Biologi Tropis Vol. 24 No. 1 (2024): 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.v24i1.6455

Abstract

Formaldehyde is a hazardous chemical substance that can be found commonly in the environment which has various effects on cellular functions and could induce the cellular oxidative stress. Oxidative stress has a direct impact on the hepatic condition and could induce the activation of inflammatory mediators, lipid peroxidation, proteosomal degradation, and mitochondrial dysfunction resulting in hepatocyte injury that could be marked by hepatic enzyme elevation and hepatic weight alterations. This research was conducted using 16 Wistar rats (Rattus norvegicus), divided into 4 groups each containing 4 Wistar rats. The first group was the control group, while the other groups were exposed to formaldehyde 10% by inhalation at doses of 20, 30, and 40 ppm formaldehyde persistently for 6 hours daily for about 16 weeks. The result of this study reveals that formaldehyde induction has a significant impact on hepatic weight elevations (p=0.007) and ALT enzyme elevations (p=0.000) in the treatment groups compared with the control group. Collectively, our results provide valuable information on the hazardous effects of formaldehyde inhalation, especially on the liver.
Histopathological Comparison of Nasopharyngeal and Lung Tissue on Wistar Rats Induced with Formaldehyde Abdiman, I Made Tobias; Wedayani, Anak Agung Ayu Niti; Prihatina, Lale Maulin; Restuningdyah, Novia Andansari Putri
Jurnal Biologi Tropis Vol. 24 No. 1 (2024): 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.v24i1.6456

Abstract

Formaldehyde is a toxic substance commonly found in everyday life. Formaldehyde is also a carcinogenic exposure that often occurs in industrial areas. Formaldehyde itself is genotoxic and cytotoxic to tissues that can cause dysplasia to carcinoma. Inhalation of formaldehyde will expose the respiratory tract, which includes the nasopharynx and lung tissue to formaldehyde. Therefore, it is important to know the differences in tissue susceptibility to formaldehyde exposure related to the ability to cause dysplasia and carcinoma. Six Wistar rats were induced with formaldehyde through the inhalation method at a dose of 40 ppm for 16 weeks, and then terminated and subjected to histopathological examination. The degree of dysplasia will be assessed in both tissues, and then compared and tested statistically. The Mann-Whitney U statistical test showed a P value of 0.818, meaning that there was no significant difference between the degree of dysplasia in nasopharyngeal tissue and lung tissue. However, there was a difference in the rate of dysplasia progression between the two tissues, with nasopharyngeal tissue having a faster rate of progression. This difference in the rate of progression is related to the higher amount of formaldehyde deposition in the upper airway.
Inhaled Formaldehyde Induction Effect on Urea and Creatinine Levels of Wistar Rats (Rattus Norvegicus) Ramadhita, Nova Izza Salsa; Lestarini, Ima Arum; Wedayani, Anak Agung Ayu Niti; Punagi, Abdul Qadar; Pieter, Nova Audrey Luetta; Cangara, Muhammad Husni
Jurnal Biologi Tropis Vol. 24 No. 1 (2024): 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.v24i1.6457

Abstract

Formaldehyde is a chemical substance that has the molecular formula H2-C=O. These chemicals are frequently present in the form of contaminants in the outdoor environment. Previous research has been undertaken to investigate the effects of formaldehyde inhalation on various organs such as the nasopharynx, upper respiratory tract, and lungs. The purpose of this study is to determine the effect of inhaled formaldehyde exposure on kidney function. The parameters of the kidney function tests that were measured were urea and creatinine levels in the rat's blood serum. For 16 weeks, 12 male Wistar rats were used in an experimental investigation with a post-test-only control group design. The rats were divided randomly control and treatment groups. Treatment group exposed to 10% formaldehyde levels as high as 40 ppm by inhalation. Blood serum samples were obtained through the retro orbit at week 16 and analyzed using a UV VIS spectrophotometer. According to data analysis utilizing the Independent T-test, there was a significant difference in the urea content test data (p < 0.05). Mann-Whitney analysis of creatine data revealed that there is no significant difference between the groups. From the statistical analysis, it can be concluded that formaldehyde exposure has an effect on increasing urea levels and has no effect on creatinine levels.
Antagonistic Test of Bacteria Producing Siderophore and Protease Enzymes from The Rhizosfer of Peanut Plants on The Growth of Pathogenic Fungus Colletotrichum gloeosporioides Nurikhsanti, Mikiyal; Zulkifli, Lalu; Rasmi, Dewa Ayu Citra; Sedijani, Prapti
Jurnal Biologi Tropis Vol. 24 No. 1 (2024): 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.v24i1.6459

Abstract

This study aims to determine the inhibitory effect of bacterial isolates producing siderophores and protease enzymes on the growth of the pathogenic fungus Colletotrichum gloeosporioides. The initial stage of research begins with the isolation of pathogenic bacteria and fungi, and is followed by testing the production of siderophores and protease enzymes. Bacteria were isolated from the rhizosphere of peanut plants, while pathogenic fungi were isolated from large chili fruit infected with anthracnose disease taken from Jelantik Village, Central Lombok Regency. Characterization of isolates for siderophore production used the Arnow method, while the protease enzyme production test used SKIM Milk Agar media. Next, the inhibition test of bacterial isolates against pathogenic fungi was carried out using the dual culture method. Characterization of potential isolates was carried out by observing bacterial colony morphology, gram staining and biochemical tests. The results of the siderophore production test showed that there was one isolate capable of producing siderophores with the isolate code RKT2. Meanwhile, the protease enzyme production test showed that all bacterial isolates produced protease enzymes, where isolate RKT9 had the highest Proteolytic Index, namely 1.57. The two isolates showed different inhibitory test results, namely isolate RKT2 had high inhibition, while RKT9 had low inhibition. The results of the research showed that a bacterial isolate (RKT2) from the rhizosphere of peanut plants was able to inhibit the growth of the pathogenic fungus Colletotrichum gloeosporioides in the high category.
Influence of IAA-Producing Bacteria and Phosphate Solubilizers from The Rhizosphere of Serbania grandiflora (L.) Pers on The in vitro Germination of Vigna radiata (L.) Arianti, Septia; Zulkifli, Lalu; Mertha, I Gde; Rasmi, Dewa Ayu Citra
Jurnal Biologi Tropis Vol. 24 No. 1 (2024): 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.v24i1.6460

Abstract

This study aims to determine the effect of IAA-producing bacteria and phosphate solvents from the rhizosphere of Serbania grandiflora (L.) Pers on the germination of Vigna radiata (L.). This research began by isolating the rhizosphere bacterium Serbania grandiflora (L.) Pers, which was then characterized by cell morphology, grammatical and morphological characteristics. The ability of bacteria to dissolve phosphate was evaluated qualitatively by observing the presence of clear zones in Pikovskaya media, and quantitatively with a spectrophotometer. The isolate's ability to produce IAA was tested quantitatively using Salkowski reagent, and quantitatively using a spectrophotometer. For the effect of isolates on the growth of green beans, a completely randomized design (CRD) research design was used, with 4 treatments, namely P0 (sterile distilled water); P1 (IAA-producing bacterial culture); P2 (phosphate solubilizing bacterial culture); P3 (IAA producer and phosphate solubilizer). Vigna radiata L. seedling growth test was carried out in vitro on Murphy's medium. The research data were analyzed using the one-way ANOVA test. The results showed that 5 isolates had the ability to dissolve phosphate, with a phosphate solubility index ranging from 1.70-2.14, where isolate RT7 showed the highest value. The isolate's ability to produce IAA at concentrations ranged from 7.1 - 62.7 ppm, with the highest value shown by isolate RT6. The results showed that treatment with IAA-producing bacterial isolates plus phosphate solubilization properties showed a significantly different effect on Vigna radiata L. plant height compared to other treatments.
Concentration Banana Peel Liquid and Dose Chicken Manure Fertilizer toward growth Lettuce (Lactuca sativa L.) Hastanah, Nurul; AM, Kartina; Fatmawaty, Andi Apriany; Rohmawati, Imas
Jurnal Biologi Tropis Vol. 24 No. 1 (2024): 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.v24i1.6464

Abstract

Lettuce is a vegetable plant originating from West Asia. Lettuce plants in Indonesia can be panted from the owlands to the highlands by considering selecting varieties. The high demind of Lettuce is not followed by an increase in production, low lettuce production is due to poor soil fertility and low levels of nutients in the soil due to excessive use of inorganic fertilizers and not paying attention to dosage. The use of organic fertilizer can increase soil fertility which is damaged by the use of inorganic fertilizer. The research was aimed to know effect of application the concentrstion of banana peel liquid based organic fertilizer and chicken manure fertilizer on the growth and yield of lettuce. The research was conducated in Sukajadi Barat Rt/Rw 001/005, Sukajadi Villager, Cibaliunh district, Pandeglang city, Banten. The method used Randomized Completely Block Design (RCBD) Concentration Banana peel liquid; 15%, 25%, and 35%. Dose chicken manure fertilizer; 71 g/polybag, 106 g/polybag, 141 g/polybag. The result research showed giving banana peel liquid influential real against all parameters except plant fresh weight. The giving chicken manure fertilizer influential real against all parameters except plant fresh weight. The conclusion of this research is the giving banana peel liquid at a concentration 25% gives the best results and chicken manure fertilizer at a dose 106 g/polybag gives the best results.
The Nutrient Composition of Fermented Maize Stover with Different Fermentors Yanuarianto, Oscar; Noersidiq, Azhary; Amin, Muhamad; Dilaga, Syamsul Hidayat; Dahlanuddin, Dahlanuddin; Imran, Tya
Jurnal Biologi Tropis Vol. 24 No. 1 (2024): 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.v24i1.6466

Abstract

In tropical areas like Indonesia, the presence of forage feed is significantly impacted by seasonal changes, resulting in abundance during the wet season and scarcity during the dry season. Agricultural waste is a solution as an alternative animal feed, one of which is corn stover. Research aimed at determining the nutritional composition of corn stover fermented with different fermentor was conducted at the Nutrition and Animal Feed Laboratory, Faculty of Animal Science, University of Mataram. This research was organized based on a completely randomized design with four treatments and five replications. They were T0: 1 kg corn stover (CS) without treatment, T1: 1 kg CS + 40 g Saccharomyces cerevisiae (SC); T2: 1 kg CS + 40 ml MA-11; T3: 1 kg CS + 20 gr SC + 20 ml MA-11. The variables observed were physical properties such as colour, texture and aroma and nutritional content (Dry matter (DM), Organic matter (OM), Crude Protein (CP), Crude Fibre (CF) and Crude Fat (CFa). The results showed that the addition of SC and MA-11 not give a significant effect (P>0.05) on CFa. However, the addition of them had a significant effect (P<0.05) on the decrease of DM, BO and SK content and the increase of PK content. The highest average BK and OM contents were obtained in T0 (control) at 81.44%, and 82.20%, the highest average CP and CFa contents were obtained in T2 (MA-11) at 9.36%, and 1.90%. The lowest average CF content was obtained in T2 (MA-11) at 26.40%.
Antibacterial Activity of Streptomyces sp. NrASA6 Culture Extract Isolated from Nypa Palm Worm Substrate against Escherichia coli, Staphylococcus aureus, and Aeromonas sp. NrBF9 Henno Wisnu Putra; Kurniatuhadi, Rikhsan; Tri Rima Setyawati; Ari Hepi Yanti
Jurnal Biologi Tropis Vol. 24 No. 1 (2024): 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.v24i1.6469

Abstract

Aquaculture is an effort to maintain aquatic commodities aimed at increasing cultivation. Probiotics are one of the components needed to serve as food additives that can prevent pathogenic bacterial infections in animals. One of the Actinomycetes species that has the potential to be used as a probiotic is Streptomyces sp. These species are known to be able to inhibit patogenic bacterial infections. The purpose of this research is to know about the antibacterial activity of the isolates Streptomyces sp. NrASA6 inhibiting the growth of Escherichia coli, Staphylococcus aureus, and Aeromonas sp. NrBF9, as well as the optimal for the test bacteria. The methods used in the antibacterial test are the agar diffusion method with pits and the swabbing method on the surface of medium MHA. The test treatment included incubation on time for Streptomyces sp. NrASA6, divided into 10, 15, 20, and 25 days. The tests were conducted at incubating temperatures of 30 °C and the diameter of the clear zone for 24 and 48 hours. The results of this research were that Streptomyces sp. NrASA6 made slowly for the patogenic bacterial Aeromonas sp. NrBF9 with a diameter of 16.97±1.15 mm for 24 hours, while an inhibition zone did not form on Escherichia coli and Staphylococcus aureus bacteri. The characteristic inhibiton of culture extract 15 days for Streptomyces sp. NrASA6 is bacteriostatic. The incubation period of Streptomyces sp. NrASA6 is influential in the stationary phase, namely 15th days after incubation.
Qualitative Analysis of Partial 16S rRNA Amplicon of Mitochondrial Gene of Stingless Bees in Pesawaran Priyambodo, Priyambodo; Rustiati, Elly Lestari; Pratiwi, Dian Neli; Susanto, Alvin Wiwiet; Imtitsal, Aulia; Fahrezi, Aditya; Febriansyah, Muhammad; Kusuma, Andriyani Wijaya; Srihanto, Eko Agus; Saswiyanti, Enny; Sidik, Mahfud; Sa'uddah, Lousanja D.; Lestari, Indah Ayu; Yani, Ani Andri; Ramadhan, Viki
Jurnal Biologi Tropis Vol. 23 No. 1 (2023): Special Issue
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.v23i1.6470

Abstract

Pesawaran is one of the areas that has the potential to cultivate stingless bees as producers of honey and propolis. This study was aimed at qualitatively analysing partial amplicons of the 16S rRNA gene from individuals found at the research site. The research was performed from April to September 2023 in an explorative approach. Based on the exploration that has been done in Harapan Jaya Village, Way Ratai District, Pesawaran Regency, individual stingless bees were obtained from 5 different colonies. Individual samples of stingless bees were further extracted and amplified by commercial kits. Each individual from 5 different colonies has successfully obtained its DNA amplicons. Based on qualitative analysis using 1% agarose gel, the size of the partial gene ranged from 400bp to 500bp. This result is in accordance with the data contained in the genbank, where the 16S rRNA gene size is more than 500bp. Therefore, it has been concluded that the size of the partial amplicons of the 16S rRNA gene of individual stingless bees from the 5 colonies that were obtained is actually in range of the size of the 16S rRNA gene of stingless bees that have been recorded in the genbank.

Page 99 of 257 | Total Record : 2562

 97   98   99   100   101 

Filter by Year

2013 2026


Reset
Filter By Issues
All Issue Vol. 26 No. 1 (2026): Januari-Maret Vol. 25 No. 4 (2025): Oktober-Desember Vol. 25 No. 4b (2025): Special Issue Vol. 25 No. 4a (2025): Special Issue Vol. 25 No. 3 (2025): Juli-September Vol. 25 No. 2 (2025): April-Juni Vol. 25 No. 1 (2025): Januari - Maret Vol. 24 No. 4 (2024): Oktober - Desember Vol. 24 No. 3 (2024): July - September Vol. 24 No. 2b (2024): Special Issue Vol. 24 No. 2 (2024): April - Juni Vol. 24 No. 1 (2024): Januari - Maret Vol. 24 No. 1b (2024): Special Issue Vol. 23 No. 4 (2023): October - December Vol. 23 No. 3 (2023): July - September Vol. 23 No. 2 (2023): April-June Vol. 23 No. 2 (2023): Special Issue Vol. 23 No. 1 (2023): Special Issue Vol. 23 No. 1 (2023): January - March Vol. 22 No. 4 (2022): October - December Vol. 22 No. 3 (2022): July - September Vol. 22 No. 2 (2022): April - June Vol. 22 No. 1 (2022): January - March Vol. 21 No. 3 (2021): September - Desember Vol. 21 No. 2 (2021): Mei - Agustus Vol. 21 No. 1 (2021): Januari - April Vol. 20 No. 3 (2020): September - Desember Vol. 20 No. 2 (2020): Mei - Agustus Vol. 20 No. 1 (2020): Januari - April Vol. 19 No. 2 (2019): Juli - Desember Vol. 19 No. 1 (2019): Januari - Juni Vol. 18 No. 2 (2018): Juli - Desember Vol. 18 No. 1 (2018): Januari - Juni Jurnal Biologi Tropis vol.17 No.2 Desember 2017 Jurnal Biologi Tropis vol.17 No.1 Juni 2017 Jurnal Biologi Tropis. Vol.16 No.2 Desember 2016 Jurnal Biologi Tropis. Vol.16 No. 1 Juni 2016 Jurnal Biologi Tropis. Vol.15 no.2 Desember 2015 Jurnal Biologi Tropis. Vol.15 No. 1 Juni 2015 Jurnal Biologi Tropis. Vol.14 No. 2 Desember 2014 Jurnal Biologi Tropis. Vol.14 No. 1 Juni 2014 Jurnal Biologi Tropis. Vol.13 No. 2 Desember 2013 Jurnal Biologi Tropis. Vol.13 No.1 Juni 2013 More Issue