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Jurnal Biologi Universitas Andalas
Published by Universitas Andalas
ISSN : -     EISSN : 23032162     DOI : -
Core Subject : Science, Agriculture,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology
Arjuna Subject : -
Articles 5 Documents
 1 
Search results for , issue "Vol 8, No 1 (2020)" : 5 Documents clear
Antibacterial potency of fresh extract leaves of jamaican cherry (Muntingia calabura L.) in Inhibiting the growth of Shigella dysenteriae. Ikel Fitri Yanis; Feskaharny Alamsjah; Anthoni Agustien; Tesri Maideliza
Jurnal Biologi Universitas Andalas Vol 8, No 1 (2020)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jbioua.8.1.14-19.2020

Abstract

Research on the antibacterial potency of fresh extract from leaves of Jamaican cherry (Muntingia calabura L.) in inhibiting the growth of Shigella dysenteriae had been conducted in the Microbiology Laboratory, Department of Biology, Faculty of Mathematics and Natural Sciences, Andalas University. The study aimed to determine the potential of fresh extract from  Jamaican cherry leaves in inhibiting the growth of S. dysenteriae and to determine its Minimum Inhibitory Concentration (MIC) and Minimum Bactericidal Concentration (MBC) against S. dysenteriae. The results showed that the fresh extract of Jamaican cherry leaves was potent as an antimicrobial agent against pathogenic bacteria S. dysenteriae. It was shown through 12 - 14 mm diameter of inhibition zone which was classified as strong inhibition. The MIC was measured at 3.125% while MBC was undetermined. According to these findings, it can be concluded that the fresh extract from Jamaican cherry leaves was potent to inhibit the growth of S.dysentriae at 3.125% concentration, yet unable to kill it.
Tracking the morphological diversity of Bucephalandra motleyana Schott (1858 (Araceae) using its commercial name in the proximities of Jakarta, Indonesia Media Fitri Isma Nugraha; Ina Erlinawati; Deni Sahroni; Wening Enggarini; Rossa Yunita; Muhammad Yamin
Jurnal Biologi Universitas Andalas Vol 8, No 1 (2020)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jbioua.8.1.1-8.2020

Abstract

Bucephalandra Schott, Gen. Aroid. (1858) is a genus within Araceae family and assigned to some aquatic plants endemic to Borneo Island, currently representing 31 species. Bucephalandra species are known as ornamental aquatic plants and common for aquascaping. These aquatic plants are highly valued, approximately € 300 in European ornamental aquatic markets and Rp 50,000–700,000 in local markets. We collected 195 specimens of Bucephalandra from 5 ornamental aquatic plant markets in the proximity of Jakarta City, Indonesia. This study is based on repeated confusion with overwhelmed vernacular names assigned for Bucephalandra in the markets. Therefore, the aims of this study are to collect and to identify of Bucephalandra offered in the aquatic plant markets with emphasis on Bucephalandra motleyana Schott 1858. Specimen identification are mostly based on reference specimens stored in the Herbarium Bogoriense Botany Division – Research Centre for Biology – Indonesian Institute of Sciences (LIPI) Cibinong. As result, this study collected 110 specimens belonged to Bucephalandra motleyana Schott 1858 and 85 specimens identified as other species within this genus.
Ultrastructure Morphology of Melastoma L. (Melastomataceae) Pollen. Lilis Suryani; Fitria Ramona
Jurnal Biologi Universitas Andalas Vol 8, No 1 (2020)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jbioua.8.1.9-13.2020

Abstract

Melastoma L. is the type genus of Melastomataceae. While Melastoma malabathricum is the type species with the mostwide spread distribution compared to other species in this genus. This research aim to study ultrastructure morphology of Melastoma pollen. The research was carried out by collecting species which included into Melastoma genus using survey method. Ultrastructure morphology of pollen was observed with Scanning Electron Microscope Type JSM-IT-200. Pollen samples originated from the pre-anthesis Melastoma flowers. The pollen was fixated, dehydrated and coated before observed, photographed and identified with electrone microscope. One species, M. malabathricum, has prolate spheroidal pollen. Four other species, M. setigerum, M. baccarianum, M.minahasae and M. malabathricum var. malabathricum, with oblate spheroidal pollen. The scanning results from electron microscope onto these five Melastoma species observed an aperture like a gap called colpus that varied in number. Pollen ornamentation resemble striate type on these five Melastoma species.
Shoot induction on several cutting types of corm of shrimp banana (Musa acuminata Colla) through in vitro culture Mayta Novaliza Isda; Elvianis Elvianis; Siti Fatonah
Jurnal Biologi Universitas Andalas Vol 8, No 1 (2020)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jbioua.8.1.20-28.2020

Abstract

Musa acuminata Colla is a unique genomic species which differs from other species in this genus. It has typical color of reddish-purple on its fruit. Musa acuminata is recorded as rare banana in Riau, particularly in Kampar District. This research aims to study the influence of several cutting types of corm of shrimp banana originated from Kampar District through in vitro culture. It also purposes to determine the best formation of M. acuminata shoot through various concentration treatments of BAP only and BAP combined with Kinetin. The study used randomized block design (RBD) by adding come BAP concentration (0, 4, 8 mg/l) and BAP combined with Kinetin (0 mg/l BAP+0.4 mg/l Kinetin, 4 mg/l BAP+0.4 mg/l Kinetin, and 8 mg/l BAP+ 0.4 mg/l Kinetin). The cutting type of banana corm involve no cut (whole) and half-to-half cutting in MS media, each with 5 replicates. The result showed that either addition of BAP and BAP combined with Kinetin gave the best percentage of live explants and shot formation up to 100%. Treatment of 8 mg/l BAP resulted in the highest shoot percentage up to 100%, the fastest shoots appearance at 34.00 days after planting and the longest shoot reached 2.83 cm with 2.33 shoots counted on half-to-half cutting type. This study also confirmed that the addition of plant regulation substances from cytokinin group gave good impact in the formation of shrimp banana shoots.
Root induction on siam orange (Citrus nobilis Lour.) originated from Kampar using in vitro shoot in MS media enriched with IBA and NAA Rasyidah Ulfa; Mayta Novaliza Isda
Jurnal Biologi Universitas Andalas Vol 8, No 1 (2020)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jbioua.8.1.29-35.2020

Abstract

Siam orange (Citrus nobilis Lour.) is a prominent agriculture commodity in Riau province. It tastes sweet, with fragrant aroma and thin skin. Its cultivation, however, needs improvement to gain better quality of product. One effort that is using the in vitro culture. The study aimed to determine the best IBA and NAA concentrations to trigger root formation on siam orange transplant and used Completely Randomized Design (CRD). The result showed that the rooting reached 100% on all treatments. The fastest rooting was observed in 2 mg/L IBA treatment (7.67 days after planting). The most root growth was obtained with combination of 0.5 mg/L NAA with 1.5 mg/L IBA (2.67 units). The longest root was obtained through the mixture of 1.5 mg/L NAA with 0.5 mg/L IBA (2.27 cm).

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