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INDONESIA
BERITA BIOLOGI
Published by Lembaga Ilmu Pengetahuan Indonesia
ISSN : -     EISSN : -     DOI : -
Core Subject : Science, Agriculture,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology
Arjuna Subject : -
Articles 28 Documents
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Search results for , issue "Vol 5, No 4 (2001)" : 28 Documents clear
PEMANFAATAN BERBAGAI SENYAWA NITRIL DAN PRODUK DEGRADASINYA SEBAGAI SUBSTRAT UNTUK PERTUMBUHAN ISOLAT BAKTERI TP Dyah Supriyati; Bambang Sunarko
BERITA BIOLOGI Vol 5, No 4 (2001)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/beritabiologi.v5i4.1129

Abstract

Our experiments showed that bacterial isolate TP was able to grow on acetonitrile, butyronitrile and propionitrile as sole sources of carbon, energy and nitrogen, but not on acrylonitrile dan benzonitrile. Besides on nitriles, isolate TP could grow on acetamide,propionamide, benzamide and nicotinamide, but not on acrylamide. However, none of the tested carboxylic acids could be used as growth subtrate for bacterial isolate TP. The best growth substrates of isolate TP were butyronitrile (CH3-CH2-CH2-CN) and propionamide (CH3-CH2-CONH2). When isolate TP grew on butyronitrile, the highest biomass concentration, the doubling-time (td), and the specific growth rate1(n) were 8.99 gram cell dry weight/liter, 4.8 h and 0.144 h , and when grew on propionamide were 4.57 gram cell dry weight/liter, 5.7 h and10.122 h", respectively.
STUDI POPULASI IKAN KALOSO (Scleropages jardinii) DI RAWA POMO KECAMATAN CITAK MITAK, KABUPATEN MERAUKE, PAPUA Agus H Tjakrawidjaja; Haryono Haryono
BERITA BIOLOGI Vol 5, No 4 (2001)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/beritabiologi.v5i4.1119

Abstract

Study on the population of bony tongue/kaloso fish (Scleropages jardinii) of Papua was conducted in April 1998, located in Rawa Pomo, Kecamatan (District) of Citak Mitak, Kabupaten (Regency) Merauke, Papua.The aims were to know density,fecundity, 2 population growth and related aspects.The method used was catch per unit efforts, in 3 stations, within the area of 50.000 m width; sampling was done in each 30 minutes and fecundity was counted by eye (visual).The results showed that abundance index was 1.862 2 2ind./m ,population density 0.0043/m ,population growth 0.017 ind/m each year and fecundity range was 87-161 eggs. The most th abundance in 8 size ranged from 45.81 to 48.54 mm SL;first maturation attained at + 30 cm. We noted the fishes biodiversity in the location i.e. 21 species belongs to 18 genera and 17 families.
REGENERASI TANAMAN KERKLILY {Lilium longiflorum Thunb.) MELALUI EMBRIOGENESIS SOMATIK PADA EKSPLAN DAUN Priyono Priyono
BERITA BIOLOGI Vol 5, No 4 (2001)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/beritabiologi.v5i4.1125

Abstract

The effects of plant growth regulators on somatic embryo genesis in Lilium longiflorum Thunb.leaf cultures were studied.The aim of the research is to study the regeneration ofi. longiflorum via somatic embryogenesis of leaf explant.IAAat5 level of concentrations (0-1 mg/1) combined with BAP at 4 level of concentrations (0-2 mg/1) were tested to induction of somatic embryogenesis in the first stage. Combination of two cytokinins, namely BAP and kinetin, combined with either of four auxins, namely IAA, IBA, NAA or 2,4D were tested to induce the somatic embryo genesis in the second stage. Combination of two concentrations of ABA, namely 0 and 1 mg/1 combined with 5 level concentrations of GA3, namely 0, 0.25, 0.5, 0.75 and 1 mg/1 were tested to improve the somatic embryos maturation.The results showed that somatic embryos were promoted by addition of IAA and BAP. The study of auxin and cytokinin combinations on somatic embryogenesis showed that somatic embryogenesis of kerk lily induced by addition of auxin and cytokinin in the culture medium.The maximum somatic embryo induction was obtained on medium contained of 0.25 mg/1 IAA combined with 1 mg/1 kinetin. Somatic embryos maturation were improved by transferring the somatic embryo from induction medium to maturation medium that contained 0.5 mg/I GA3 +1 mg/1 ABA.
PENGARUH PEMBERIAN SUPLEMEN MADU PADA INDUK MENCIT TERHADAP RASIO JENIS KELAMIN ANAKNYA Awal Riyanto
BERITA BIOLOGI Vol 5, No 4 (2001)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/beritabiologi.v5i4.1130

Abstract

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PENINGKATAN KERAGAMAN GENETIK MAWAR MINI MELALUI KULTURIN-VITRO DAN IRADIASI SINAR GAMMA Wahyu Handayati; Darliah Darliah; I Mariska; R Purnamaningsih
BERITA BIOLOGI Vol 5, No 4 (2001)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/beritabiologi.v5i4.1120

Abstract

Mini rose (Rosa hybrida L.)is one of the favorite ornamental plants. To get a new appearance of this mini rose, two experiments were conducted at Cipanas and Bogor, from April 1999 to March 2000.In the first experiment, the treatment was the dosage of gamma ray irradiation, i.e. 0, 1, 2, 3, 4, 6, 8, 10 and 12 krad.In the second experiment, the treatment was the concentration of callus induced mediumi.e. 2,4-dichlorophenoxyacetic acid (2,4-D) (0.5 and 1 mg/1) + chinetine (1, 3 and 5 mg/1).Randomized Block Design was used with 5 replications. Mini rose Romantica Meilandina (pink color) and Prince Meilandina (dark red color) was used as a source of plant material.The results showed that the irradiation dosage from 1 until 3 krad gave the best appearance compared with the other treatments.Considering the observance to plantlet in the same dosage, the color of the flower was changed from the natural color to white and red color.The combination of 0,5 mg/12,4- dichlorophenoxyacetic acid + 3 mg/1 chinetine was the best medium to the callus growth.
SUKSESI SEKUNDER PASCA TEBANG PILIH HUTAN PAMAH DIPTEROCARPS DIDESA TAILELEU, TAMAN NASIONAL PULAU SIBERUT, SUMATERA BARAT Herwint Simbolon
BERITA BIOLOGI Vol 5, No 4 (2001)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/beritabiologi.v5i4.1126

Abstract

A study on the tree diversity and secondary succession after selective logging of lowland mixed dipterocarps forest has been conducted at three sites (Mongakngai, Kaloat, and Taipah) of Taileleu Village, Siberut Island National Park, West Sumatra. Plot size at each Mongakngai, Kaloat and Taipah site was: 100 x 30m; 100 x 40m; and 100 x 50m,respectively. Tree plants with DBH of more than 10 cm at each site were 50, 47 and 42 (or 101 species in total), while small tree plants of 2-10cm in DBH were 78, 11 and 98 (or 203 species in total), respectively. The most dominant species were Ficus subcordata, Aphorosa sphaeridophora and Castanopsios rhamnifolia at each site, respectively. Based on the similarity indices, those sites were clustered. Species diversity and structure of the forest at each site were also discussed in relation to the natural succession of forest.
ANATOMI DAN KANDUNGAN KLOROFIL DAUN KELADI TIKUS {Thyponiumflageliforme (Lodd.) Bl.} PADA BERBAGAI INTENSITAS CAHAYA Titi Juhaeti
BERITA BIOLOGI Vol 5, No 4 (2001)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/beritabiologi.v5i4.1131

Abstract

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PENGARUH MIKROBA TANAH TERHADAP PERTUMBUHAN DAN HASIL PANEN KEDELAI (Glycine max L.) Sri Purwaningsih
BERITA BIOLOGI Vol 5, No 4 (2001)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/beritabiologi.v5i4.1121

Abstract

A study was conducted in order to know the effect of soil microorganism as biofertilizer on the growth and yield of soybean (Glycine max L.) in Malang, East Java.The purpose of the study was to get inoculants as biofertilizer to improve the production of soybean.The experiment was carried out in Bantur village, Bantur district, South Malang, East Java, by using the rice land.The strain used were five single inoculants as follows: A (Bio 20R + Bio 22R + Bio 277R), B (Bio 277R + Bio 278R + Bio 302R), C (1L + 8L + Bio 302R), D (Bio 20R + Bio 22R + Bio 277R + Bio 278R + Bio 302R + 1L + 8L), V (MVA fungi), and four mixed inoculants (AV, BV, CV, and DV). Four controls as uninoculated plant and without fertilizer (Ki), uninoculated plant and with Urea fertilizer equal to 100 kg/ha (K2), uninoculated plant and with TSP fertilizer equal to 80 kg/ha (K3), uninoculated plant and with Urea and TSP fertilizer (K4). The experiment was designed as Randomized Complete Block as 13 treatments with three replications for each treatment, and interval planted with 20 x 35 cm. The plants were harvested after 90 days. The parameters of investigation were the dry weight of canopy, roots, root nodules, seeds, 100 of seeds, number of nodules and pods with harvest productions. The results showed that single inoculants (MVA fungi) and mixed inoculants CV (1L + 8L + Bio 302R) and MVA fungi) gave better results on the production of soybean.

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