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Bioscience
Published by Universitas Negeri Padang
ISSN : 2614669X     EISSN : 2579308X     DOI : -
Core Subject : Science, Agriculture,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Immunology & microbiology
Bioscience ISSN 2579-308X (Electronic) ISSN: 2614-669X (Print) is peer-reviewed journal and scientific journal publish by Universitas Negeri Padang. The aim of this journal is to publish articles dedicated to all aspects of the latest outstanding developments in the field of biology. Scope of this journal is ;Environmental Biology; Genetics and Biotechnology; Biology of Function; Systematics, Structure and Development.
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Articles 7 Documents
 1 
Search results for , issue "Vol 8, No 1 (2024): Biology" : 7 Documents clear
Antimicrobial Potential Of Endophyte Bacteria In Angsana Plants (Pterocarpus indicus Willd) Nurhasnah Nurhasnah; Media Roza; Milya Sari; Kencanawati Kencanawati
Bioscience Vol 8, No 1 (2024): Biology
Publisher : UNIVERSITAS NEGERI PADANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/0202371121349-0-00

Abstract

The discovery of antimicrobial active compounds is one of the pressing things in the world of medicine and the pharmaceutical industry, due to the increasing and widespread resistance of pathogenic bacteria to existing antimicrobials. Angsana plant (Pterocarpus Indicus Willd) has been shown to have efficacy as a drug, so it has the potential to be used as a source of natural antibiotics. This study aims to find out the types of endophytes in various parts of the Angsana plant (Pterocarpus indicus Willd) through macroscopic and microscopic identification and find out the activity of antimicrobial compound-producing endophye bacteria in Angsana plants. Bacterial purification techniques use streak plate and spread plate methods. Antimicrobial activity tests are carried out using diffusion methods by means of point inoculation. The results showed 29 isolates of endophye bacteria isolated from the Angsana plant (Pterocarpus indicus Willd). From the roots as many as 11 isolates, stems as many as 12 isolates, and leaves as many as 6 isolates. The result of Gram staining of Angsana plant endophyte bacteria, obtained 22 bacterial isolates including Gram positive and 7 is Gram negative. There were 21 bacil-shaped endophyte bacterial isolates, 7 coccus-shaped isolates and 1 coccobacil-shaped isolate. Isolate the endophyte bacteria of Angsana plants that have the potential to produce antimicrobial compounds as many as 20 isolates. Isolates of Angsana plant endophyte bacteria form a bland zone in    S. aureus (10 isolates), E. coli (17 isolates). Endophyte bacterial isolates that are able to inhibit the growth of bacteria S. aureus and  E. coli are 7 isolates
A PRELIMINARY STUDI ON TREES AND ROAD INFRASTRUCTURE CONFLICTS IN PADANG CITY WEST SUMATERA INDONESIA marsia pela; Afrizal Afrizal; Reki Kardiman; Jabang Nurdin
Bioscience Vol 8, No 1 (2024): Biology
Publisher : UNIVERSITAS NEGERI PADANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/bsc.v8i1.127749

Abstract

Trees always appear as green building in a city, it growth side by side with various types of soild infrastructures and often ended with a conflict. Many cities in Indonesia experience the conflicts, especially between road and trees, which resulting risks to public and high restoration cost, but this urban green dynamic has not scientifically explored yet. We initiates a study on the dynamics of tree conflicts with road infrastructure in Padang City, a representative city in Indonesia with numerous conflict events. Species of tree, diameter, and distance to infrastructure were measured along 1.5 km of secondary and 1.5 km of primary road. There were 524 trees belong to nine species were found along 3 km road, and 35% of the trees were conflicted with the infrastructure. Primary road was dominated by small trees and was only causing 11% conflicts, while secondary road was dominated by large trees and 71% were conflicted. Number of conflict led by Pterocarpus indicus on both road types, while Swietenia mahogani was only conflicted with secondary road infrastructure and Dialium indum was only conflicted at primary road. Conflict of P. indicus at primary road was found at all diameter levels but at the secondary road the conflict was mostly associated to large trees. We also found many trees without conflict at all levels of diameter on both road types. Conflict of trees occurred at various distance to infrastructure and this found on both small and large trees. This study highlight that conflict between trees and infrastructure differed among species, size of tree diameter and conflict will always occurred when trees planted less than 2 m to infrastructure.
PRODUCTION OF SPESIFIC XYLANASE ENZYME BY MUDIAK SAPAN HOT WATER THERMOPHILIC BACTERY Irdawati Irdawati; Muhammad Deedat Ayasy; Azwir Anhar; Linda Advinda; Yusrizal Yusrizal
Bioscience Vol 8, No 1 (2024): Biology
Publisher : UNIVERSITAS NEGERI PADANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/bsc.v8i1.122728

Abstract

Xylanase is an extracellular enzyme capable of hydrolyzing hemicellulose so that it can convert xylan into xylose. Thermostable xylanase enzymes can be produced by thermophilic bacteria. Thermophilic bacteria are used because they have advantages such as the ability to increase enzyme production in adjustable catalytic specifications. Bacteria are not only in a single form but also exist in a mixed form called a consortium. Compared with a single isolate, the performance of the consortium is better. Consortium is a mixture of microbial populations in the form of communities that have cooperative, commensal, and mutualistic relationships. This study aims to look at the cooperation between the consortium isolates and the consortium's ability to produce xylanase enzymes. This research is a descriptive study. The bacterial consortium is fermented in beechwood xylan medium. The results of this study were that MSS 11, MS 18, MS 16 consortium produced the highest xylanase enzyme activity, namely 12,887.Xilanase merupakan enzim ekstraseuler yang mampu menghidrolisis hemiselulosa sehingga dapat merubah xilan menjadi xilosa. Enzim xilanase termostabil dapat diproduksi oleh bakteri termofilik. Bakteri termofilik digunakan karena dapat memiliki keunggulan seperti aktivitas dan peningkatan spesifikasi katalisis yang dapat diatur. bakteri tidak hanya dalam bentuk tunggal namun juga ada dalam bentuk campuran yang disebut konsorsium. Dibandingkan dengan isolat tunggal, kinerja konsorsium lebih baik. Konsorsium merupakan campuran populasi mikroba dalambentuk komunitas yang mempunyai hubungan kooperatif, komensal, dan mutualitsik. Penelitian ini bertujuan untuk melihat kerjasama antar isolat konsorsium dan kemampuan konsorsium dalam menghasilkan enzim xylanase. Penelitian ini bersifat deskriptif. Pada penelitian ini, konsorsium bakteri difermentasikan dalam medium beechwood xylan. Hasil penelitian ini adalah konsorsium MSS 11, MS 18, MS 16 menghasilkan aktivitas enzim xylanase spesifik tertinggi yaitu 12,887.
Morphological Response of Several Rice Varieties to Drought Stress Simulation using PEG Rezi Nabilah; Afifatul Achyar; Zulyusri Zulyusri; Yusni Atifah; Dwi Hilda Putri; Violita Violita
Bioscience Vol 8, No 1 (2024): Biology
Publisher : UNIVERSITAS NEGERI PADANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/bsc.v8i1.122676

Abstract

Rice has become food for most of the world's population. Indonesia is the third largest producer in the world. However, in fact rice production in Indonesia has decreased by 0.43% compared to 2020. One of the factors that can cause this decline is drought. Because rice is a semi-aquatic plant that grows normally in flooded conditions, it makes drought stress very threatening. Drought stress that occurs in plants causes plants to experience oxidative stress due to excessive accumulation of ROS. PEG is a compound that is widely used to provide drought conditions in plants. Previous research has classified several varieties of rice plants based on their level of resistance to drought. However, it is not yet known how the morphological response will be in different periods of drought stress and rewatering treatment. This research was conducted by giving treatment in the form of control (Yoshida nutrient culture solution) and drought stress (Yoshida + PEG-6000 20% solution) repeated 3 times. The observed parameters were RWC which were analyzed using standard errors and morphological images of roots and leaves. The results showed that the RWC obtained during the stress period from the third to the fifth day, Harum had the highest value according to its class as tolerant rice. After rewatering Rosna has a better recovery ability. In addition, root morphology shows differences in the form of root length, small root diameter, inhibition of adventive root growth. On the leaves include a decrease in leaf area, leaf curl up, and leaf yellowing.
Floristic composition and economic value of trees at agroforestry parak in Tanjung Raya District, Agam Regency, West Sumatra Indonesia Alfitrah Habibullah. M; Irma Leilani eka Putri; Azwir Anhar; Reki Kardiman
Bioscience Vol 8, No 1 (2024): Biology
Publisher : UNIVERSITAS NEGERI PADANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/bsc.v8i1.125863

Abstract

This study aimed to investigate the floristic composition and the economic values of trees at the agroforestry parak in Maninjau, Tanjung Raya District. Four different villages were selected purposively according to the tree structure of parak, and each village represented each compass point surrounding the Maninjau Lake. 20 x 100 m plot was established at each sites, where all tree species were identified, and five owner of the parak at each location were asked about the fruiting and harvesting season, management and potential income from each of tree species. 20 tree species belong to 13 families were found across the sites, but only five were occured at all sites, while the others were missed at least from one site. Most species produced fruits with fruiting and harvesting season ranged from one to three times a year, but only seven species knew the income from selling the commodity. From all seven species, which varied on the harvesting season, the owner of each parak gained up to four million IDR per month. This study showed that variation of species and the harvesting season beneficial the owner of the parak and may kept the parak as primary or alternative livelihood.
Microbiological Quality Analysis and Identification of Lactic Acid Bacteria from the Product of Fermentation of Mackerel Sukmawati Sukmawati
Bioscience Vol 8, No 1 (2024): Biology
Publisher : UNIVERSITAS NEGERI PADANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/bsc.v8i1.123909

Abstract

Mackerel is a type of fish that has high nutritional value, this fish is a source of protein and is in great demand by many people. Mackerel can be processed into various types of processed food, one of which is through the fermentation process. The purpose of this study was to determine the microbiological quality, to determine the characteristics and the number of lactic acid bacteria , and to identify the species of lactic acid bacteria found in the fermented mackerel product. The results showed that the microbiological test of mackerel fermented products had the highest total plate number (ALT) in the Fit.L sample, namely 4.2x105 cfu/g, followed by the Fit.C sample with a value of 2.4x104 cfu/g, and the lowest value was in the Fit. A sample  4.3x103 cfu/g. The total plate number (ALT) in each test sample stated that the number did not exceed the maximum limit of the Indonesian national standard. Microbiological test results through the E.coli estimator test of the three samples showed a value of <3 APM/g, then the reinforcement test results were declared not to contain E.coli bacteria.The number of lactic acid bacteria (LAB) present in the mackerel fermented product sample showed the highest value in the Fit.L sample, namely 1.8x104 cfu/g, then in the Fit.C sample with a value of 2.6x103 cfu/g, while the lowest was in the Fit. A sample whose value is 3.6x102 cfu/g. The morphological characteristics of the LAB colonies from the three samples showed the same characteristics, namely round shape, smooth edges and convex elevation. The results of the identification of the two isolates from the two samples stated that the Fit.A isolate was identified as Staphylococcus condimenti strain DSM 11674 and the Fit.C isolate was identified as Lactobacillus reuteri strain 1444
New Records of Proceratium deelemani Perrault, 1981 (Hymenoptera : Formicidae : Proceratiinae) in Sumatra Rini Wulandari; Dwi Hilda Putri; Dezi Handayani; Afifatul Achyar; Rijal Satria
Bioscience Vol 8, No 1 (2024): Biology
Publisher : UNIVERSITAS NEGERI PADANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/bsc.v8i1.126193

Abstract

Proceratium Roger, 1863 is a genus of ants that has widely distributed throughout the world, Proceratium species rarely collected, their cryptobiotic lifestyle. This condition also occurs on the Sumatra Island, Indonesia. So far, only single species was recorded in this island, namely Proceratium papuanum Emery, 1897. We conducted a survey of leaf-litter ants in June 2021 by using Winkler’s extraction method in lowland disturbed forest near Tiga Tingkat Water fall Lubuk Hitam, Teluk Kabung Utara, Bungus Teluk Kabung, Padang, West Sumatra, Indonesia. The discovery of Proceratium deelemani Perrault, 1981 for the first time in Sumatera Island, Indonesia was increased the total ant fauna in this island. In the present study, we reports new distribution record of Proceratium deelemani Perrault, 1981 in Sumatra. Total two species of this genus was recorded in Sumatra: Proceratium deelemani Perrault, 1981 and Proceratium papuanum Emery, 1897.

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