Jurnal Biologi UNAND
Not a member yet
273 research outputs found
Sort by
Callus Induction of Aerides odorata Lour. by Adding 2,4 Dichlorophenoxyacetic Acid (2,4-D)
Get PDFThe research about callus induction of Aerides odorata L. by adding 2,4 Dichlorophenoxyacetic Acid (2,4-D), has been done from August to October 2018 in Plant Physiology and Tissue Culture Laboratory, Department of Biology, Faculty of Mathematics and Natural Science, Andalas University, Padang. The aim of this research was found the effective consentration of 2,4-D to induce somatic embryo of A.odorata. The research used Completely Randomized Design (CRD) with 5 treatments and 6 replications. The treatments were: 0 mg/L 2,4-D; 0,25 mg/L 2,4-D; 0,5 mg/L 2,4-D; 0,75 mg/L 2,4-D; 1 mg/L 2,4-D. The result showed that the treatmeant were able induction callus of A.odorata, with compact until the friable texture, color of the resulting callus is yellowish green and greenish yellow. 2,4-D 1 mg/L was the best concentration to increase fresh weight of callus
Keanekaragaman Mamalia di Cagar Alam Rimbo Panti, Kabupaten Pasaman, Sumatera Barat
Get PDFRimbo Panti Nature Reserve is a conservation area located in West Sumatra which consisted of two main habitat types, dry hilly and swampy forest habitat types. These forest types potentially board many species of mammals. This research was conducted from December 2015 to March 2016 in The Nature Reserve to determine the diversity of mammals occupied each type of habitats. Twenty two camera traps were installed in pairs, six pairs in the dry hilly habitat (574-871 m asl) and five pairs in the swampy habitat (216-261 m asl). From a total 109 photos, 17 species were identified, consisted of 11 species from hilly and 10 species from swampy forest habitat. There were four species found in both habitat types. Shannon-Wiener diversity index showed that mammalian diversity of Rimbo Panti Nature Reserve is moderate (H’=1.95) while mammalian diversity in swampy forest (H’= 2.06) was higher than hilly habitat forest (H’=1.54)
Komunitas Collembola pada Hutan Konservasi dan Perkebunan Sawit di Kawasan PT. Tidar Kerinci Agung (TKA), Sumatera Barat
Get PDFThe research about composition and structure of Collembola community was conducted at TKA company area, west Sumatra. Collembola were collected at oil palm plantation, conservasion forest and forest edge sites (between conservation forest and plantation area) by survey method with systematic random sampling for collembolla in litter and soil. A total of four Collembola species that belonging to 2 orders, 3 families, 4 genera and 57 individuals was collected. The density of Collembola in litter at conservation forest site was higher than density of Collembola at oil palm plantation site meanwhile the density of Collembola in soil at conservation forest site was higher than density of Collembola in the soil at palm plantation site. Relative density of Isotomiella sp. in litter at oil palm plantation site (100%) was higher than relative density of Folsomides sp. at conservation forest site (5,5%) as well as in the soil. The highest diversity index of Collembola was found in litter of conservation forest (1,18). The highest similarity index was found between conservation forest and forest edge (85,71%) meanwhile the lowest similarity index was found between conservation forest and oil palm plantation (40%)
Aplikasi Pupuk Organik Cair Menggunakan Bioaktivator Mikroorganisme Indigenous HPPB Untuk Pertumbuhan Desmodium heterophyllum pada Tanah Bekas Tambang Batu Kapur PT. Semen Padang
Get PDFThe research about application of liquid organic fertilizers with indigenous microorganism bioactivator of HPPB for growth of Desmodium heterophyllum on limestone mined land at PT. Semen Padang, had been conducted from May to August 2015 in Nursery and Reforestation, Laboratory of Plant Physiology Department of Biology, and the Laboratory of Soil Science Faculty of Agriculture, Andalas University, Padang. The research aimed to determine the effect and concentration of Liquid Organic Fertilizers (LOF) by using indigenous microorganism bioactivator originated from HPPB in limestone mined land ofPT. Semen Padang. This study used Completely Randomized Design (CRD) with five treatments and four replications. The treatments were control without LOF (A), 10% LOF (B), 20% LOF (C), 30% LOF (D) and 40% LOF (E). The results showed that 10% LOF was the best concentration to increase the number of leaves (36,44), percentage of land cover (6,71%) and fresh weight of plants (5,15g)
Pengaruh Ekstrak Daun Tumbuhan Mikania micrantha Kunth. (Invasif) dan Cosmos sulphureus Cav. (Non Invasif) Terhadap Perkecambahan Jagung (Zea mays L.)
Get PDFThe Research about the effects of extract from the invasive plant leaves of Mikania micrantha Kunth. and non-invasive plant leaves of Cosmos sulphureus Cav. on the germination of corn (Zea mays L.) has been conducted in July 2016 in Plant Physiology and Tissue Culture Laboratory, Biology Department, Mathematics and Natural Science Faculty, Andalas University, Padang. The aim of this research was to compare the effect of extract from the leaves of plants M. micrantha and C. sulphureus with several concentrations on the germination of corn. The research used experimental method with Completely Randomized Design (CRD) on Nested, 9 treatments and 4 replications. The treatments were factor A (type of plants, a1= Mikania micrantha and a2= Cosmos sulphureus) and factor B (leaf extract concentration, b0= 0%, b1= 20%, b= 40%, b3= 60%, b4= 80%). The results showed that the extract of the leaves from M. micrantha affected to reduced the fresh weight plants at concentration of 20%, where as in leaf extract of C. sulphureus affected to reduced the fresh weight plants at concentration of 40%
Pengaruh Pupuk N dan Cekaman Kekeringan terhadap Pertumbuhan dan Kandungan Artemisinin Tanaman Artemisia vulgaris L.
Get PDFThe research about effect of Nitrogen fertilizer and stress water on the growth and artemisinin content of Artemisia vulgaris L. has been conducted from December 2015 to March 2016 in Screen House and Plant Physiology Laboratory, Department of Biology, Faculty of Mathematics and Natural Science, Andalas University, Padang. The purpose of this research were to the effect of Nitrogen fertilizer, stress water, and their interaction between on the growth and artemisinin content of A. vulgaris. This research used Completely Randomized Design (CRD) in factorial with four treatments ad three replications. The result showed that the number of leaves, plant height, length of roots, fresh weight, dry weight and of Artemisia vulgaris L. were increased significantly on N fertilizer treatments. The treatment of stress water 60% of volume capacity gave significantly effect on numbers of leaves and the highest content of Artemisinin was 80% volume capacity. The interaction of N fertilizer and stress water did not showed significantly effect on the growth and artemisinin content of Artemisia vulgaris L
Komunitas Makrozoobentos di Sungai Suir dalam Area Perkebunan Kelapa Sawit PT. Tidar Kerinci Agung
Get PDFThe aim of this research was to know the composition and structure of macrozoobenthic community in Suir Stream at palm oil plantation area of PT. Tidar Kerinci Agung (TKA) has been conducted in February 2016 using survey method and purposive sampling technique in collecting data. Study sites consist of four stations based on condition around the stream. Macrozoobenthic community were sampled using surber net method with triplicate and accompanying physic-chemical measurements on each station. The results of this research show that 54 genera of macrozoobenthic were found consist of Insecta 44 genera, Oligochaeta 8 genera, Turbellaria and Gastropoda one genus respectively. The density of macrozoobenthic community range from 259.26-507.41 ind/m2 with average 381 ind/m2. The highest was found in station II dan the lowest was in station IV. The dominant genera (relative abundance > 10 %) in station I was Eukefferiella, station II Eukefferiella and Antocha, station III Tubificidae and Lumbriculus, station IV Eukiefferiella, Pseudocleon and Haplotaxis. The diversity of macrozoobenthic community was classified as moderate (H’= 1.25-2.94) and high equitability (E=0.54-0.84)
Diversitas Gastropoda pada Akar Mangrove di Pulau Sirandah, Padang, Sumatera Barat
Get PDFCurrently, there are a lot of activities in Sirandah Island, such as tourism activities and deforestation to support the activities. Mangrove forest distruction makes a useable area might have negative effect to mangrove ecosystem itself or mollusc community. This research was conducted on mangrove roots area from February until October 2016. The aim of this research is to know the diversity of Gastropods on the roots of the mangrove. This research was conducted using survey method and purposive sampling method to collecting data. We recorded 8 genera of Gastropods belong to 8 families, named Cerithium, Conus, Ellobium, Littorina, Melongena, Nerita, Cymatium and Turbo. The highest abundance was found in the genus of  Littorina with 59.33 individuals/tree. Based on location, abundance ranged from 4.33-60.33 individuals/tree with the highest abundance on mangrove roots of Barringtonia asiatica. Diversity indices of Gastropods on mangrove roots in Sirandah Island ranged from 0.77 to 1.42 which is relative low range
Laba-Laba Famili Araneidae pada Kawasan Cagar Alam Lembah Anai Kabupaten Tanah Datar, Sumatera Barat
Get PDFAn inventory of spiders araneidae (Arachnida: Araneae) from Nature Reserve Lembah Anai, Tanah Datar , West Sumatra was conducted from March to December 2015 by using the sweeping, hand collection,  beating and sieving methods. From a total of  37  individuals , we identified to 9 species that belong to 6 genera. Araneus has the top species number of species (3 species), while, Acusilas, Clycosa, Argiope, Gasteracantha, Larinia and Nephila were found only one species for each one
Bioaktivitas Antibakteri Lamun Thalassia hemprichii dan Enhalus acoroides
Get PDFThe objective of present study was to identify bioactivity of antibacterial Indonesian Seagrass Thalassia hemprichii dan Enhalus acoroides from Karang Tirta Beach, Padang City, West Sumatera. This is a preliminary research for a new alternative antibiotic from Seagrass in Indonesia. In this study the seagrass was examined by a maceration process and using the rotary evaporator to obtain viscous extract. The material for the bioactivity testing was performed upon several intended bacteria such as Escherichia coli, Stapillococcus aureus, and Bacillus subtilis. The bioactivity testing was performed by using the method of resazurin and MIC (Minimum Inhibitory Concentration), which is determined by looking at well blue-colored at the smallest concentration. The result revealed that the best antibacterial bioactivity of Thalassia hemprichii extract was a total of 62.50 μg/mL N-hexane solvent against Escherichia coli and Stapillococcus aureus bacteria. While the best antibacterial bioactivity of Enhalus acoroides extract is 15.62 μg/mL of N-hexane solvent against Stapillococcus aureus