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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 2,562 Documents
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Growth Response of Amorphophallus muelleri Blume Tuber to Etawa Goat Manure Fertilizer Application Andi Masniawati
Jurnal Biologi Tropis Vol. 23 No. 3 (2023): July - 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.v23i3.5231

Abstract

Amorphophallus muelleri Blume, commonly known as Porang, is a glucomannan-producing plant with extensive benefits. To boost its production, proper fertilization methods are essential. However, excessive use of inorganic fertilizers can negatively impact soil fertility. Adopting environmentally friendly agriculture, this study explores the effect of etawa goat manure on the growth of Amorphophallus muelleri Blume tuber shoots. Conducted from September 2022 to February 2023, the research used a Completely Randomized Design with five treatments: P0 (control), P1 (100 g), P2 (200 g), P3 (300 g), and P4 (400 g), each replicated four times. Data analysis involved the SPSS 24.0 program, employing one way ANOVA test and 5% BNT test. Results indicated that etawa goat manure did not significantly affect sprouting age and shoot height, but significantly influenced shoot diameter of tubers. The most optimal dose was 400 g (P4), producing the highest average shoot height (5.61 cm) and shoot diameter (9.70 mm). The fastest sprouting age (7 days after planting) occurred with 200 g of manure (P2), while the slowest growth (31.50 days after planting) was observed in the 100 g dose treatment (P1). In conclusion, environmentally friendly practices, especially applying 400 g of etawa goat manure, enhance the growth of Amorphophallus muelleri Blume tuber shoots. These findings offer valuable insights into sustainable agricultural approaches to cultivate this valuable plant.
Diversity of Seagrass Species in The Conservation Area of The Sawu Sea Marine National Park (TNP) Lambok Laurence Silaban; Fakhrurrozi Fakhrurrozi; Juraij Juraij; M Rizki Fauzi; Chandrika Eka Larasati; Ibadur Rahman
Jurnal Biologi Tropis Vol. 23 No. 4 (2023): October - December
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.v23i4.5268

Abstract

The Sawu Sea is an important habitat for dolphins, dugongs, manta rays and turtles. Sabu Island is one of the locations included in the Sawu Marine National Park area with considerable seagrass potential. The purpose of this study was to determine the health condition and community structure of seagrass on Sabu Island. This study used line transect, square transect, and random transect methods. The results of observations found 8 species, the most common types of seagrass were Thalassia hemprichii, Cymodocea rotundata, Halodule uninervis, Halophila ovalis, and Syringodium isoetifolium. A type of seagrass that is rarely found is Cymodocea serrulate which is only found in Loborai. The highest species density at Bodae station is Halodule unservices, and the lowest at Bodae station is Enhalus acoroides. The diversity index of seagrass species at the three stations is included in the low species diversity category. Seagrass species uniformity index is included in the medium community category. The dominance index of seagrass species at 3 stations is in the low dominance category. The highest coverage was Halodule uninervis with a value of 42.74% and the lowest was Enhalus acoroides with a value of 0.69%. The extent of seagrass cover at each of the Bodae, Laborai, and Keliha locations is 69.09%, 62%, and 66%, respectively. The highest Importance Value Index was found in Halodule uniservis, namely 138.00%, 30.55%, 96.80%, and the lowest was in Cymodocea serrulate. Overall the health condition of the seagrass beds at the observation location is included in the healthy category.
Lombok Pumice for Adsorption of Fe2+ Metal Ions Using Activation Temperature Variations Sinta Devi Hariyanti; Susi Rahayu; Siti Alaa’; Dian Wijaya Kurniawidi
Jurnal Biologi Tropis Vol. 23 No. 3 (2023): July - 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.v23i3.5306

Abstract

Fe is a heavy metal that is often found in water. If the level exceeds the maximum limit and is continuously consumed, it will cause various kinds of diseases so that a method is needed that can reduce the level of heavy metal Fe2+. In this study, Fe2+ metal ion adsorption was carried out using pumice which aims to determine the characteristics of pumice which include surface area, density and porosity, adsorption ability, and determine the contact time required to absorb Fe2+ metal ions. The adsorption method used is the batch method, with activation treatment for each adsorbent. Activation is done by heating at a temperature variation of 250o, 400o, and 550oC. The results showed that the highest adsorption capacity of pumice was activated pumice powder at a temperature of 550oC with a characteristic surface area of ​​8.196 m2/g, porosity 12.722% and density 2.374 gr/cm3 and the best contact time was at 60 minutes with absorption efficiency 86.4%
The Potential of Hot Water Mudiak Sapan Thermophilic Bactery Consortium Formulation in Producing Xylanase Enzyme Irdawati; Indrawani Matondang; Linda Advinda; Azwir Anhar; Yusrizal Y
Jurnal Biologi Tropis Vol. 23 No. 4 (2023): October - December
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.v23i4.5309

Abstract

The xylanase enzyme has high commercial value in the industrial sector, including the food industry, animal feed, bleaching of pulp/pulp, lignocellulosic bioconversion as fuel, and in the food industry, namely the cheese, bread and meat industries, while in the non-food industry this can be used in detergents. Xylanase enzymes can be produced from microorganisms, one of which is thermophilic bacteria. Thermophilic bacteria are known to be able to produce thermostable enzymes and proteins that are heat resistant. Xylanase production in compatible bacterial consortia was higher than monoculture. The purpose of this study was to determine the bicultur consortium that has the potential to produce xylanase enzymes. This research is an experimental research. Enzyme activity testing used the Miller method with DNS (Dinitrosalycilic acid) reagent using a completely randomized design (CRD) with 3 repetitions. Data on the results of xylanase activity were analyzed by ANOVA test and DMRT follow-up test with a 5% significance level.The results of the thermophilic bacterial isolates in the consortium that have the potential to produce xylanase enzymes are MS18 & MSS15,  MSS15, MS16 and MS18 & MS16.
Identification of Lactic Acid Bacteria From Pandan Civet Feces (P. hermaphroditus) in West Kalimantan Based on Phenotypic Similarity Ageresya Ester Evelin Br Sibarani; Rahmawati Rahmawati; Firman Saputra
Jurnal Biologi Tropis Vol. 23 No. 4 (2023): October - December
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.v23i4.5314

Abstract

Lactic acid bacteria are included in the gram positive bacteria that are widely distributed in the digestive tract of living things, such as in the feces of the Pandan Luwak (P. hermaphroditus) and important role in improving the microbial balance in the body. The purpose of this study was to obtain phenotypic characters, types of bacteria and similarity relationship between lactic acid bacteria from feces of Pandan Civet (P. hermaphroditus) in West Kalimantan and lactic acid bacteria in the identification book Bergey's manual of determinative bacteriology. This research was conducted by the method of isolation and screening bacteria using MRSA media supplemented with CaCO3 1%. Characterization of lactic acid bacteria based on morphological, biochemical, and physiological characters in Bergey's Manual of Determination Bacteriology. The results of the analysis using the MVSP (Multivariant Statistic Package) program with SSM coefficients and the UPGMA method obtained 44 bacterial isolates  thought to belong to two genera, namely the genus Lactobacillus and Bifidobacterium with three species, namely L. casei, L. brevis and B. bifidum. The results of the analysis showed that 12 bacterial isolates had a similarity index of 87,6% to L. casei, 17 bacterial isolates had a similarity index of 92,2% to B. bifidum and 15 bacterial isolates had a similarity index of 84,5% to L. brevis.
Identification of Lactic Acid Bacteria from Fermented Kimchi Sawi Ansabi (Brassica juncea L.) using Phenotypic Similarities Selly Marselina Teul; Rahmawati Rahmawati; Siti Ifadatin
Jurnal Biologi Tropis Vol. 23 No. 4 (2023): October - December
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.v23i4.5315

Abstract

Latic acid bacteria play a significant role in the fermentation of food, such as kimchi, which is fermented vegetables. Sawi kampung ansabi is a vegetable cultivated by the Dayak people in Kalimantan during the rice farming season which can be fermented into kimchi. Based on phenotypic similaities, the aim of this study was to identify and acquire cultures of lactic acid bacteria on MRSA media (De Man Rogosa and Sharpe Agar) enriched 1% CaCO3 from kimchi sawi ansabi fermented food sawi ansabi. The results of the isolations were used to test 10 isolates of lactic acid bacteria using the MVSP (Multivariate Statistical Package) program, the UPGMA (Unweighted Pair Group Method with Arithmetic Average Mean) method based on the Simple Matching Coefficient and Jaccard Coefficient to form dendrograms. Simple Matching Coefficient analysis resulted 8 isolates suspected to be Lactobacillus plantarum with a similarity index of 94.6%, 1 suspected 91.9% to Lactobacillus dellbrueckii, and 1 suspected 91.9% to Pediococcus cerevisiae. The Jaccard Coefficient analysis resulted in 8 isolates suspected of Lactobacillus plantarum with a similarity index of 92.6%, 1 isolate suspected 87% to Lactobacillus dellbrueckii, and 1 isolate 88% to Pediococcus cerevisiae.
Estimation of Variance and Heritability Components in F2 Populations of Maize (Zea mays L.) in Dry Land Amanah Aulia Adeputri; M. Taufik Fauzi; Suwardji; A. A. Ketut Sudharmawan
Jurnal Biologi Tropis Vol. 23 No. 4 (2023): October - December
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.v23i4.5326

Abstract

The F2 population of maize plants that has been obtained from hybridization between NK212 and NK7328 varieties has not been suspected of genetic diversity components and heritability in the narrow sense. This study aimed to determine the magnitude of the alleged value of variety components and heritability, as well as determine the types of varieties to be formed. The experimental design used was the Group Randomized Design (RAK) - North Carrolina I (NCI) consisting of 120 treatments. The experimental setup involved 40 male parent plants, each paired with 3 female parent plants in season I, and this procedure was replicated twice, resulting in a total of 240 treatment groups. The collected data was subjected to analysis through variety analysis (ANOVA) utilizing the NCI model. The results showed that the presumptive value of additive variety and dominant variety based on the results of data analysis varied, but in all observed traits the dominant variety value tended to be greater. Most of the observed traits have a negative heritability presumptive value, except for stem diameter, panicle exit age, fresh pruning weight, and 1000 seed weights. The conclusion obtained is that most of the observed properties have additive variance values and negative heritability values; the dominant variance value in all observed properties is greater than that of additive variety; The heritability of most traits cannot be predicted because they are negative. Therefore, it is advisable for the improvement of the F2 population is with the formation of hybrids.
Morphological Appearance of M3 Generation Mutant Strains of Brown Rice (G16) to Support Rice Seedingi in Upland Ria Ayu Chandraningsih; Taufik Fauzi; Suwardji; Anak Agung Ketut Sudharmawan
Jurnal Biologi Tropis Vol. 23 No. 2 (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.v23i2.5329

Abstract

Brown rice local cultivars are found in West Nusa Tenggara, but brown rice is still very rare to be used as a source of genetic diversity and its improvement is also lacking to be considered. This research aims to determine the effect of 300 Gy gamma ray irradiation on the quantitative properties of third generation G16 brown rice (M3) in the uplands. In this research, an experimental method was used with field experiments from May to December 2022 in Tatar Hamlet, Nyurlembang Village, Narmada District, West Lombok Regency. This research used Randomized Block Design (RBD) in an Augmented design with 18 treatments consisting of 15 G16 mutant strains and 3 comparison plants. The data obtained were analyzed using Analysis of Variance (Anova) with a level of 5%, then the real different treatment was further tested using the Least Significance Different (LSD) test. Based on the results of the research, it was obtained that some of the quantitative traits observed did not have differences in the properties of the elders and their comparators. The morphological apperance of mutant plants is the same as that of both the elders and the comparison varieties. However, it can be said that all strains based on their morphological appearance have the potential to be developed on dry land, because all strains tested show the same results compared to their elders and peers.
Genetic Parameters of Rice Strains (Oryza sativa L.) Functional for Development and Increasing Production in Medium Plain Dry Lands Amilia Qurota A'yun; M. Taufik Fauzi; Suwardji; A. A. K. Sudharmawan
Jurnal Biologi Tropis Vol. 23 No. 2 (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.v23i2.5331

Abstract

Functional rice is a food that contains more than one forming component that is useful for health. Nowadays public interest in functional food is increasing, so functional rice production needs to be increased. Therefore, this research was conducted with the hope of obtaining information on superior agronomic characters to increase the yield power of functional rice strains. The method used was experimental using a randomized group design (RAK). Data analysis consists of Analysis of Variance, genetic diversity coefficient, phenotype diversity coefficient, genotype correlation, phenotype correlation, and heritability in a broad sense. The results showed that the heritability value of high area meaning is found in the character of flowering, harvest age, plant height, panicle length of the amount of grain contained, and the amount of empty grain. The high value of the KKG and KKF is indicated by the character of the number of non-productive saplings, while the lowest value is indicated by the character of the age of harvest. All quantitative characters observed showed positive genotypic correlation results to grain weight per clump. While in phenotypic correlation only the character of plant height, panicle length, the amount of grain containing, the amount of hollow grain and the weight of 100 grains are positive. Based on the analysis that has been carried out the character  of plant height, panicle length, the amount of grain containing the amount of hollow grain and the weight of 100 grains need to be taken into account as selection criteria to obtain high-yielding functional rice.
Determination of PEG (Polyethlenee Glycol) Concentration and Dosage to Evaluate The Resistance of Rice (Oryza Sativa L.) to Drought Siti Raihanun; M. Taufik Fauzi; Suwardji Suwardji; A.A.K Sudharmawan
Jurnal Biologi Tropis Vol. 23 No. 4 (2023): October - December
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.v23i4.5332

Abstract

The writing is intended to assess the response of rice plants to the germination phase through induce concentrations and a dose of the PEG. Library research is used in this writing by locating and collecting libraries that were generated by earlier research. As for the data obtained in this writing, it is the result of analysis of various vets and rice varieties of Cempo Laut, Edok, Mutant Galurses (M5-GR150 1-4, M5-GR150 1-9, M5-GR200 1-2, M5-GR150 2-2, M5-GR150 2-3), Legowo, Malihan Ketan, Mlarak 1, Inpago, IR 64, Palenok, Philips, Radix. Concentrations of PEG 6000 and 8000 with a dose of 0%, 5%, 15%, 20% and 25% induced, then treated with the best denunciation. Observation data indicate that each response is different. PEG concentration of 8000 and dose of -0.5 MPa gave the best germination power.

Page 79 of 257 | Total Record : 2562

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