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BIOTROPIA - The Southeast Asian Journal of Tropical Biology
Published by Southeast Asian Regional Centre for Tropical Biology
ISSN : 02156334     EISSN : 1907770X     DOI : http://dx.doi.org/10.11598/btb
Core Subject : Health, Science, Agriculture,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Immunology & microbiology Veterinary
BIOTROPIA, The Southeast Asian Journal of Tropical Biology, is a scientific publication of the Southeast Asian Ministers of Education Organization (SEAMEO) – Southeast Asian Regional Center for Tropical Biology (BIOTROP). It publishes articles in the broad areas of tropical ecosystems and environmental impacts, biodiversity conservation and sustainable development and biotechnology.
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Ilmu Pertanian dan Biologi (Lain-Lain)
Articles 520 Documents
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CRITICAL PERIOD OF MUNGBEAN (PHASEOLUS RADIATUS L.) TO WEED COMPETITION UTOMO, I.H.
BIOTROPIA No. 2 (1989)
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (228.537 KB) | DOI: 10.11598/btb.1989.0.2.91

Abstract

A  field  experiment was  conducted  to  study  the  critical  period  of weed  control  on  the  crop  of mungbean (Phaseolus radiatus L.). The studies were done in the field of BIOTROP Experimental Station with  the  natural  existing weed  population.  It was  found  that  the  critical  period  of mungbean  to weed competition was from 3-6 weeks after planting.
THE RANGE EXPANSION OF Parachromis managuensis (GÜNTHER, 1867) (PERCIFORMES, 4 CICHLIDAE) IN JAVA, INDONESIA Veryl Hasan; Abdul Rahem Faqih; Maftuch Maftuch
BIOTROPIA - The Southeast Asian Journal of Tropical Biology Vol. 29 No. 1 (2022): BIOTROPIA Vol. 29 No. 1 April 2022
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (61.606 KB) | DOI: 10.11598/btb.2022.29.1.1278

Abstract

The Jaguar cichlid, Parachromis managuensis (Günther, 1867), is native to Central America, with introduc­tions reported from West Java and Central Java Provinces of Indonesia. On 7-8 January 2019, sixteen specimens of P. managuensis were collected from Karangkates, the largest hydropower reservoir in East Java Province of Indonesia. A description of the morphological characters of specimens is provided.
Elimination Of CVB (Chrysanthemum Virus B) From A Range Of ChrysanthemumTHE Varieties By Meristem Culture Following Antiviral and Heat Treatments Budiarto, Kurniawan; Budi, Budi Marwoto; Lia, Lia Sanjaya; Muchdar, Muchdar Soedarjo; Indijarto, Indijarto Budi Rahardjo
BIOTROPIA Vol. 18 No. 2 (2011): BIOTROPIA Vol. 18 No. 2 December 2011
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (92.283 KB) | DOI: 10.11598/btb.2011.18.2.45

Abstract

CVB elimination for retaining healthy protocols from infected chrysanthemum plant was investigated trough combined treatment of meristem culture with synthetic antiviral ribavirin and thermotherapy under in vitro conditions. The biological material used on the experimentation was constituted of six commercial varieties: Dewi Sartika, Saraswati, Yellow Fiji, White Puma, Yellow Puma and White Reagent.  Tissue culture initiation was conducted through plantlet establishment using MS supplemented with IAA.  Ribavirin was added in media treatments with the concentration of 40 mg/l.  Parallel with this step, heat treatment with different durations (1, 2, and 3 weeks) was also conducted on the plantlets.  Meristem culture was done following the chemo- and thermotherapy.  The experiment resumed the failure single treatment of meristem culture in eliminating CVB from the infected chrysanthemum plantlets.  Under heat treatment, percentage of virus-free plantlets increased along with the duration of thermotherapy, though the survival rate of plantlets decreased in lengthened heat treatment. The best results regarding virus free plant percentage was obtained when meristem culture was applied following ribavirin or three weeks heat treatment which effectively eliminated virus particles from the plant.
Biochemical Characteristics of Thionic Fluvisol Linked to Land Use Types in Southern Vietnam Chung, Nguyen Tan; Chung, Sy Danh; Thoi, Hoang Van
BIOTROPIA Vol. 24 No. 3 (2017): BIOTROPIA Vol. 24 No. 3 December 2017
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11598/btb.2017.24.3.736

Abstract

Thionic Fluvisols soil in Southern Vietnam is like typical acid sulfate soil in the tropics and is severely polluted due to human activities. Salinity intrusion and industrial wastewater contamination are the main causes of environmental degradation in the soil ecosystem. This research aimed to determine a link between biochemical soil properties and land use types to provide suitable solutions for afforestation and soil restoration. Soil sampling was conducted in five different land use types at four soil layers (O, AB, Bj, and Cp). The five land use types were sugarcane crop; Melaleuca plantation; 2-year Acacia plantation; 5-year Acacia plantation; and control (grass-covered land). The results showed that soil in those five land use types was very acidic (pH ≤ 4) with poor nutrient conditions, with orthophosphate content ranging from 378–640 mg/kg, N-NH₄ from 586–999 mg/kg, and N-NO₃ from 830–1,112 mg/kg. Concentrations of toxic ions were very high, with large variation among land use types and soil depths: 1,799–12,403 mg SO₄²⁻/kg; 22–1,645 mg exchangeable Fe/kg; and 34–88 mg Al/kg soil. The lowest concentrations of exchangeable Fe²⁺ and SO₄²⁻ ions were found in sugarcane and Melaleuca plantations, respectively. Twenty-three sulfur-oxidizing bacteria and two iron-oxidizing bacteria were identified. All these bacteria were initially identified as Thiobacillus sp. Sugarcane and Melaleuca plantations exhibited the most diverse Thiobacillus species, which was linked to the reduction of exchangeable Fe²⁺ and SO₄²⁻ concentrations in these two land use types. This study indicated that Thiobacillus sp. could grow well in the Thionic Fluvisols. It is proposed that Melaleuca and sugarcane species could reduce iron and sulfur contents in Thionic Fluvisols in the tropics.
INFLUENCE OF INSECT AND SEED SAMPLE SIZE AND HEAT TREATMENT ON THE INFESTATION OF CALLOSOBRUCHVS CHINENS1S (L.) ON MUNGBEAN, VIGNA RADIATA (L) Wilczek *) M. BucruANON1, ELISA
BIOTROPIA No. 10 (1997)
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (698.795 KB) | DOI: 10.11598/btb.1997.0.10.130

Abstract

The  influence  of  different  insect  and  seed  sample  size  and  heat  treatment  on  the  infestation  of  bean  weevil, Callosobruchus chinensis on mungbean,Vjg/m radiata (L.) Wilczek, was studied. Insect and seed sample size as well as varieties/genotype had significant influence in obtaining large responses in the number of eggs and progenies of the bean weevil. Use of at least 10 adult weevils to infest test samples containing at least 40 seeds for a 5-day oviposition period should produce reliable results when infesting mungbean seeds with unsexed weevils. Dry heat treatment was very effective in disinfesting mungbean seeds from the bean weevil in different developmental stages. It improved germination depending upon the condition of the seed before tr eatment and certain temperature limits. A suggested  treatment for mungbean dismfestation using dry heat would be 60°C and 70°C for  two-and one-hour treatments, respectively at 12% moisture content. For seeds in bulk, 60°C is much preferred.Key words:   Callosobruchus chinensis/ Insect and seed sample size/Mungbean infestation/Heat treatment
Phylogenetical Study of Wild Banana Species (Musa L.) in Sulawesi Inferred from Internal Transcribed Spacer Region of Nuclear Ribosomal DNA Sequences Sulistyaningsih, Lulut Dwi; Megia, Rita; Widjaja, Elizabeth Anita
BIOTROPIA Vol. 21 No. 1 (2014): BIOTROPIA Vol. 21 No. 1 June 2014
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (15465.995 KB) | DOI: 10.11598/btb.2014.21.1.311

Abstract

Study to determine the phylogenetic relationship of wild banana species (Musa) in Sulawesi based on the ITS regions sequences has been done. A total of 28 samples including 16 ITS sequences from GeneBank were used. Species of Ensete and Musella were incorporated as an outgroup. Total DNA was extracted by the modified CTAB. ITS-5 and ITS-4 primers were used to amplify the ITS regions. Data sequences were edited by ChromasPro and were aligned by Muscle software.Some unique nucleotides were found in M. balbisiana, M. itinerans, and M. textilis sequences. Strict consensus tree revealed from Maximum Parsimony (MP) as well as Bayesian analysis showed Musa textilis was separated from other taxa in which M. textilis become as the basal sister to M. balbisiana. By using MP analysis, M. itinerans together with M. acuminata ssp. banksii, M. acuminata var. tomentosa, and M. celebica placed in the same clade, whereas Bayesian analysis showed M. itinerans was separated and placed in different clade.
Heterogeneity of Proteins in Birds’ Egg-Whites Hashim, Hayder Obayes; Al-Shuhaib, Mohammed Baqur Sahib; Ewadh, Mufeed Jaleel
BIOTROPIA Vol. 26 No. 2 (2019): BIOTROPIA Vol. 26 No. 2 August 2019
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11598/btb.2019.26.2.812

Abstract

Little is known about the comparative heterogeneity of protein compounds among a wide variety of birds’ egg whites, particularly regarding detailed, parallel protein composition analysis. Therefore, this research was conducted mainly to evaluate the extent of variability among 42 types of birds’ egg whites. To improve the understanding of these biological fluids, the main phenotypic variations of egg whites were evaluated using discontinuous denaturing polyacrylamide gel electrophoresis (SDS-PAGE), gradient SDS-PAGE, native PAGE, cellulose acetate electrophoresis, and reverse-phase high-performance liquid chromatography (RP-HPLC). The results showed that native PAGE and SDS-PAGE produced better screening outcomes than the other methods in identifying proteins. Although native PAGE and SDS-PAGE did not show remarkable variability in terms of hydrophobicity, several electrophoretic differences in egg white proteins were observed. Several unknown proteins in the egg white samples of different bird species were also identified through electrophoretic experiments. Hence, it may be possible, as demonstrated in the case of egg white samples, to provide a characterization-based assessment among bird species using only available gel electrophoresis techniques. This study also provided a rapid snapshot for the initial identification of several unknown components of egg white proteins. Accordingly, this research represents the first large-scale comparative proteomics investigation conducted among a diverse range of egg whites obtained from commercial stores and bird keepers in the Middle Euphrates region of Iraq.
CHARACTERIZATION OF MALAYSIAN WILD BANANAS BASED ON ANTHOCYANINS MUHAMMAD ASIF JAVED; MAK. CHAI; ROFINA YASMIN OTHMAN
BIOTROPIA - The Southeast Asian Journal of Tropical Biology No. 16 (2001)
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11598/btb.2001.0.16.164

Abstract

The male buds of 16 Musa species (Musaceae) populations were investigated by HPLC for the occurrence of anthocyanins. The investigation was based on the presence of 6 anthocyanins. The 16 Musa samples could be classified into three distinct species i.e. Musa acuminata, Musa violascens and Musa balbisiana. Musa acuminata could be divided into two subspecies : malaccensis (lowland) and tmncata (highland) according to their constituents and content of major anthocyanins. No variation was observed in the composition of the anthocyanins of Kedah type ssp. siamea and Selangor types ssp. malaccensis. The classification of M. acuminata into two subspecies based on anthocyanin data further supported the current taxonomic grouping of the species. Key words: Musa acuminata/Musa violascens/Musa balbisiana/Musaceae /HPLC /chemotaxonomy
MULTIDISCIPLINARY RESEARCH ON Shorea javanica TORQUEBIAU, E.F.
BIOTROPIA Vol. 1 No. 1 (1987)
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11598/btb.1987.1.1.84

Abstract

It was April 1985, under  the  leadership  of Dr.  Ir. Z. Goto,  then Tropical Forest Biology Program Manager, that it was decided to launch in BIOTROP a multidisciplinary research on Shorea javanica. This followed the publication in 1984 by E.F. Torquebiau of a paper describing the traditional planting of this tree for resin production by farmers near the small town of Krui, in Lampung Province, Southern Sumatra (Man-made dipterocarp forest in Sumatra. Agroforestry Systems, 2: 103-127). A proposal was subsequently made to develop in BIOTROP different research topics around this species in order to promote it  for  plantation  forestry.  The  choice  of  this  species  was  justified  by  the  important knowledge from its traditional uses and planting, while in the long term, it is hoped that the development of plantations of this species will promote the use of other dipterocarps and native trees for plantation forestry.
ASSESSMENT OF COASTAL LAND USE CHANGES IN BANTEN BAY, INDONESIA USING DIFFERENT CHANGE DETECTION METHODS DOYDEE, PUVADOL; SlREGAR, VlNCENTIUS
BIOTROPIA Vol. 13 No. 2 (2006): BIOTROPIA Vol. 13 No. 2 December 2006
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11598/btb.2006.13.2.224

Abstract

Many types of the coastal land use in Banten Bay have been assessed in order to know the change as evidently detected by Landsat imagery in 1994 and 2001. Image processing such as, supervised classification and various change detection techniques are performed to the satellite images. Red Green method showed the best result for detecting the coastal land use change. This method is suitable for detecting the increasing areas of the paddy fields and settlement. Image Differencing method is capable to detect the increasing areas in agriculture, decreasing in fishponds and natural areas. Image Ratioing method can be considered suitable for detecting the increasing area of fishponds, decreasing of paddy fields and agriculture areas. Each coastal land use type has increased, except for the natural area/brushwood. Most of agriculture and paddy fields areas have been converted to fish ponds. Key words: coastal land use/land cover, change detection method, remote sensing

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