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Journal of Tropical Life Science : International Journal of Theoretical, Experimental, and Applied Life Sciences
Published by Universitas Brawijaya
ISSN : 20875517     EISSN : 25274376     DOI : -
Core Subject : Agriculture, Social,
Agriculture, Biological Sciences & Forestry Environmental Science
The Journal of Tropical Life Science (JTLS) provides publication of full-length papers, short communication and review articles describing of new finding or theory in living system, cells and molecular level in tropical life science and related areas. The journal publishes articles that report novel findings of wide Tropical Life system phenomenon in the areas of biodiversity, agriculture, fisheries, health, husbandry, forestry and environmental technology. JTLS has 1 volume with 3 issues per year.
Arjuna Subject : -
Articles 1,001 Documents
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Selection of High Oil Yielding Trees of Millettia pinnata (L.) Panigrahi, Vegetative Propagation and Growth in the Field Ni Luh Arpiwi; I Made Sutha Negara; I Nengah Simpen
Journal of Tropical Life Science Vol. 7 No. 3 (2017)
Publisher : Journal of Tropical Life Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/jtls.07.03.11

Abstract

Millettia pinnata (L.) Panigrahi is a potential legume tree that produces seed oil for biodiesel feedstock. The initial step for raising a large-scale plantation of the species is selection of high oil yielding trees from the natural habitat. This is followed by vegetative propagation of the selected trees and then testing the growth of the clone in the field.  The aim of the present study was to select high-oil yielding trees of M. pinnata, to propagate the selected trees by budding and to evaluate the survival and growth of budded plants in the field. Pods were collected from 30 trees in Lovina Beach, Buleleng Regency, Bali. Oil was extracted from seeds using soxhlet with hexane as a solvent.  The high oil yielding trees were propagated by budding using root stocks grown from M. pinnata seeds.  Scions were taken from young branches of selected trees. Incision was made on rootstock and the same size of cut was made on a scion containing a single bud.  The scion was inserted to the incision of rootstock then closed tightly using plastic strips.   The plastic was removed when the scion grew into a little green shoot. One month after plastic removal, the scion union grew into a single shoot and then the budded plants were removed to polybags. Budded plants were planted in the field of Bukit Jimbaran, Badung Regency, Bali with 4 × 4 spacing. Results showed all budded plants successfully grow new shoots. Two months after planting the survival of budded plants was 100%. Plant height increased by 22.13 cm, stem diameter increased by 2.43 mm and the number of compound leaf increased by 2.08.  It can be concluded that four high oil yielding trees were selected from Lovina Beach and successfully propagated by budding. Survival of budded plants was 100% with vigorous growth.
Potential of Wild Yeast from Banana to Control Colletotrichum musae Fungi Caused Anthracnose Disease and Its Short Antagonistic Mechanism Assay Anton Muhibuddin; Antok Wahyu Sektiono; Dewi Maratus Sholihah
Journal of Tropical Life Science Vol. 9 No. 1 (2019)
Publisher : Journal of Tropical Life Science

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Anthracnose caused by Colletotrichum musae is one of several important disease in banana fruit. An effective, cheap, and safe control method are necessary as a postharvest disease control alternative. This research aimed to obtain and identify wild yeast from banana which was isolated from its peel that has antagonist ability effectively in controlling anthracnose disease of banana fruit.  This research was started with an isolation of C. musae and yeast from banana, followed by in vivo assay with count percentage antagonist level, slide culture, and in vivo assay to know pathogen incubation stage and incident disease level. The yeast that isolated from ambon variety was Candida sp. and Pichia sp. Metchnikowia sp. from kepok variety respectively.
Dynamics of a Fractional Order Eco-Epidemiological Model Kartika Nugraheni; Trisilowati Trisilowati; Agus Suryanto
Journal of Tropical Life Science Vol. 7 No. 3 (2017)
Publisher : Journal of Tropical Life Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/jtls.07.03.09

Abstract

In this paper, we propose a fractional order eco-epidemiological model. We considere the existence of time memory in the growth rate of the three populations. We observed the dynamical behaviour by analysing with fractional order and then simulateing using Grünwald-Letnikov approximation to support analytical results. It found that the model has five equilibrium points, namely the origin, the survival of susceptible prey, the predator free equilibria, the infected prey free equilibria, the interior equilibria. Numerical simulations show that the existence of fractional order  is a factor which affects the behaviour of solutions. 
Identification of Fingerprints Pattern in Mixed Family of Chinese-Javanese Ethnic Istiftakhun Nikmah; Fatchiyah Fatchiyah
Journal of Tropical Life Science Vol. 7 No. 3 (2017)
Publisher : Journal of Tropical Life Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/jtls.07.03.12

Abstract

The aim of this study is to identify fingerprints patterns from the mixed family of Chinese-Javanese ethnic. The fingerprint patterns divided into three main patterns, i.e. arch, loop and whorl. The respondents were determined based on inclusion criteria (subject of research qualified as a sample) and the exclusion criteria (subjects which could not be used as a sample) through interviews and questionnaires. First, respondent’s fingers cleaned with alcohol or washed using soapy water. The patterns of fingerprint were taken by pressing one by one using an inked stamp pad. Then, printed on white paper which has been given a code and serial number of fingers for each respondent. The last step was to identify the specific characteristic of fingerprint patterns from the respondents and analyzed it while determining about similarity and variability of inter-generations. The results indicated that the mixed family of Chinese-Javanese ethnic had whorl variant pattern (plain whorl and double loop whorl) on the thumbs as a specific marker of Javanese ethnic. Otherwise, radial loop on the index and tented arch pattern on both index and little finger are the unique marker of Chinese ethnic. Thus, both Javanese and Chinese ethnic have co-dominant fingerprint patterns for mixed family of Chinese-Javanese ethnic.
Levels of 25(OH)D3, IL-2, and C-peptide in Children with Type 1 Diabetes Mellitus (T1DM) Receiving Vitamin D3 Supplementation Tjahyo Suryanto; Harjoedi Adji Tjahjono; Edi Widjajanto
Journal of Tropical Life Science Vol. 8 No. 1 (2018)
Publisher : Journal of Tropical Life Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/jtls.08.01.06

Abstract

Type 1 Diabetes Mellitus (T1DM) has become a health problem in many countries. T1DM is the consequence of autoimmune destruction process of β cells. There was relationship between vitamin D deficiency with T1DM. The destruction process was caused by an imbalance of pro-inflammatory and anti-inflammatory cytokines. One of the pro-inflammatory cytokines is IL-2. C-peptide examination to see the function of beta cells due to destruction of pancreatic beta cell. Administration of vitamin D3 supplementation still cause controversy and give varying results. This randomized clinical trial was conducted to determine the levels of 25(OH)D3, IL-2, and C-peptide in people with T1DM who received vitamin D3 supplementation. The subjects were 26 children with T1DM, divided into K1 group (received vitamin D3 supplementation) and K2 group (received placebo). The results showed higher levels of 25(OH)D3 in the K1 group and statistically found a significant difference (p = 0.00). Higher levels of IL-2 and lower C-peptide were obtained in the K1 group and no statistically significant differences were found (p = 0.76 and p= 0.26). The insignificant relationship and the negative correlation were found between 25(OH)D3 and IL-2 (p = 0.71; r = - 0.12), 25(OH)D3 and C-peptide (p = 0.59; r = -0.16), also levels of IL-2 and C-peptide (p = 0.13; r = -0.44) in children with type 1 diabetes who received vitamin D3 supplementation. From this study can be concluded that administration vitamin D3 supplementation in patients with T1DM can increase levels 25(OH)D3 significantly. This increase has not significantly lowered levels of IL-2 and increased levels of C-peptide. However, there was an absolute decrease in the rate of slower C-peptide in the supplemented group than in the placebo group.
Ethnobotany of MandailingTribe in Batang Gadis National Park Aswarina Nasution; Tatik Chikmawati; Eko Baroto Walujo; Ervizal Amir Muhammad Zuhud
Journal of Tropical Life Science Vol. 8 No. 1 (2018)
Publisher : Journal of Tropical Life Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/jtls.08.01.09

Abstract

 Batang Gadis National Park (BGNP) located in Bukit Barisan Mountains, Sumatera Utara. A Mandailing tribe  who lives around the BGNP, has the unique local knowledge, such as processing young stem of rattan (Calamus manan) into pakkat (traditional food) and use rimbang (Solanum torvum) to neutralize toxins. These local knowledge could be lost because it only inherited orally from generation to generation. This study was aimed to reveal ethnobotany knowledge of Mandailing Tribe. The study was conducted in November 2015 in four villages around the BGNP, Sibanggor Jae, Hutabaringin Julu, Pastap Jae, and Botung Villages. Data were collected by interviewing informants in each village as well as the field survey through two approaches, emic and etic. A total of 262 plant species is used by Mandailing Tribe for subsistence and commercial needs. The highest utilization is for food  (106 species), followed by traditional medicines (81 species), firewood (29 species), building materials (35 species), and animal feed (25 species). People also used plant for household appliances, agricultural equipment, art materials, ropes and wrap, and pest control materials. Eme/rice (Oryza sativa) have the highest Index of Cultural Significance (ICS) values. The existence of this species is maintained for its local wisdom. Thus, involvement of  local  community will give great contribution to manage and conserve the BGNP area. 
Cyanobacteria Community Dynamics and Trophic Status of Intensive Shrimp (Litopenaeus vannamei) Farming Pond in Situbondo East Java Indonesia Dian Aliviyanti; Suharjono Suharjono; Catur Retnaningdyah
Journal of Tropical Life Science Vol. 7 No. 3 (2017)
Publisher : Journal of Tropical Life Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/jtls.07.03.10

Abstract

The objective of this study was to analyze the dynamics community structure of Cyanobacteria and trophic status in ponds of intensive shrimp culture (Litopenaeus vannamei) in Situbondo based on Trophic Diatom Index (TDI).  The ex post facto research was conducted in situ in the hamlet of Pond Mutiara Mas III Klatakan Situbondo East Java Indonesia.  Observation of Cyanobacteria and Diatoms community structure were done every week during four cycles of shrimp farming ponds.  Cycle of shrimp farming ponds is the times for enlargement process of the shrimps from seed to mature which ranges from 90-120 days.  The dependent variables were the density of Cyanobacteria and Diatoms community, as well as chemical parameters nitrite and orthophosphate.  Trophic status was determined from TDI be counted from data of diatom density.  All of the data were then classified using cluster and biplot analysis program PAST Ver. 3.11 to discribe the profile of ecosystem quality.  The research results showed that there were four taxa of Cyanobacteria during farming cycle which the highest density was found from the genus of Oscillatoria.  Based on the value of TDI, we found that the trophic status of water in shrimps pond during the production process was eutrophic until hyper-eutrophic.  The water quality was decreases along with the length of incubation time.
Elevational Pattern of Orchid Rarity and Endemism in Mt. Kalatungan, Mindanao Island, Philippines Jessa Marie Garsuta Betanio; Dave Paladin Buenavista
Journal of Tropical Life Science Vol. 8 No. 2 (2018)
Publisher : Journal of Tropical Life Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/jtls.08.02.03

Abstract

Despite being the Philippines most threatened group of plants, ecological studies on the orchid flora remains to be scanty and poorly studied which become an impediment to their conservation. This study aimed to identify the forest zones and species of conservation priority with an emphasis on the rare and endemic or-chid species.  A field investigation was carried out using a line transect and plot-sampling methods established along the elevational zones of Mt. Kalatungan Range National Park. Results showed the presence of 44 orchid species belonging to 28 genera, 39 (91%) species of orchids are Philippine endemic with eight new records. The elevational pattern of species followed a double humped-shaped pattern at 1,320-1,395 m and 1,886 – 1,965 m above sea levels (masl). Based on rarity index, 35 (83%) species are very rare, three (7%) are sparse, three (7%) common and one (3%) is common. The density of endemism was recorded to increase as eleva-tion increases which peaked at 1,886 – 1,965 masl but declines at 2,000 masl Findings of the study suggest that the elevational pattern of orchid species follows a humped-shaped pattern wherein species richness is highest in the middle of the elevation gradient.
Cadmium (Cd) Absorption and Phenol Content in Pogostemon Exposed to Heavy Metals Elly Proklamasiningsih; Iman Budisantoso; Kamsinah Kamsinah
Journal of Tropical Life Science Vol. 8 No. 1 (2018)
Publisher : Journal of Tropical Life Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/jtls.08.01.02

Abstract

Patchouli (Pogostemon cablin Benth.) is an important plant used by industrial facilities to absorb cadmium (Cd) in polluted land. We performed an experiment using plant medium polluted with both Cd and lead (Pb) with added humic acid. The aims of this study were to 1) determine the effects of humic acid in growth medium contaminated with Cd and Pb on the absorption of Cd and phenol content in patchouli, and 2) determine the Cd tolerance level of the growth media. A completely randomized factorial design was used for the experiment with two factors. The heavy metals were a combination of pure PbNO3 and Cd (PC) with a ratio 1 : 1, and included five concentrations: PC0 (without PbNO3 and without Cd); PC1 (250 ppm PbNO3 + 250 ppm Cd); PC2 (500 ppm PbNO3 + 500 ppm Cd); PC3 (750 ppm PbNO3 + 750 ppm Cd); PC4 (1,000 ppm PbNO3 + 1,000 ppm Cd) and humic acid concentration (0; 6,000; 12,000; and 18,000 ppm). Each treatment was replicated three times. The parameters observed were plant biomass, Cd absorption, and phenol content. The application rate of humic acid to the plant medium containing heavy metals influenced the growth of patchouli, Cd absorption, and phenol content. An application rate of 12,000 ppm of humic acid reduced the toxicity of the heavy metals and increased the dry biomass and phenol content of patchouli.
Biodiversity of Medicinal Plants at Sambas Botanical Garden, West Kalimantan, Indonesia Sudarmono Sudarmono
Journal of Tropical Life Science Vol. 8 No. 2 (2018)
Publisher : Journal of Tropical Life Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/jtls.08.02.04

Abstract

Botanical garden is one of ex-situ conservation which has function as germ plasm conservation, education/research, and recreation. To conserve plants biodiversity, many local governments in Indonesia propose to cooperate with LIPI to build botanical gardens. Sambas botanical garden with an area ± 300 ha in West Kalimantan is one of a botanical garden which is under construction. As new exploration site, many biodiversity in this area has not been entirely explored yet including its medicinal plants. Methods used in this study including field survey and interview techniques. The objective of this study is to explore a biodiversity of medicinal plants in that area. This study identified 30 medicinal plants, representing 20 families and 25 genera. It indicated that Sambas botanical garden has many highly potential values of medicinal plants. Therefore, a proper management including medicinal plant for this area is strongly required. 

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