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INDONESIA
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 15 Documents
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Search results for , issue "Vol. 11 No. 1 (2021)" : 15 Documents clear
A checklist of Zingiberaceae species from Mt. Hamiguitan Range Wildlife Sanctuary, Davao Oriental, Philippines Mark Arcebal Kling Naive
Journal of Tropical Life Science Vol. 11 No. 1 (2021)
Publisher : Journal of Tropical Life Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/jtls.11.01.14

Abstract

Mount Hamiguitan Range Wildlife Sanctuary is a center of botanical diversity throughout the Philippine archipelago. However, as to how many Zingiberaceae species are present in the area is still unknown. Thus, floristic surveys were made and collections were conducted from July 2016 to September 2018. In total, 16 species belonging to eight genera representing three tribes of the family were recorded. The most species rich tribe belongs to Alpinieae with 13 species in 5 genera. This study presents a checklist of Zingiberaceae species found in the sanctuary which is beneficial for its efficient biological resource mangement. 
Effect of essential oils on seed borne Fusarium sp., and seed quality of sesame (Sesamum indicum L.) K GIRISH; Chaithra T S; Syeda Kousar Fathima
Journal of Tropical Life Science Vol. 11 No. 1 (2021)
Publisher : Journal of Tropical Life Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/jtls.11.01.13

Abstract

Sesame is as an important oilseed crop and seed borne fungi are reducing the yield as well as quality of the seeds produced. The present study aimed to evaluate the effect of essential oils for control of seed borne fungi as well as enhancement of seed quality of sesame. Fusarium sp., was isolated from sesame seeds by agar plate method. Four essential oils such as camphor oil, cinnamon oil, clove oil and rose oil were screened for their antifungal potential against the isolated Fusarium sp., by poisoned food method. Selected essential oils were tested at different concentrations of 100, 200, 300, 400 and 500 ppm concentrations for their ability to inhibit the mycelial growth of test fungi. All the oils completely inhibited the mycelial growth of test fungi at 500 ppm concentration. The effect of selected essential oils on sesame seed quality was analyzed by standard blotter method. All the four oils increased the germination percentage and seed vigour while the fungal infection was completely inhibited without any phytotoxic effects. These results observed of the essential oils indicate the possible usage of them for the sesame seed treatment following further investigations.
Conservation strategy of Anaphalis spp. in Bromo Tengger Semeru National Park, East Java Filza Yulina Ade; Luchman Hakim; Estri Laras Arumingtyas; Rodiyati Azrianingsih
Journal of Tropical Life Science Vol. 11 No. 1 (2021)
Publisher : Journal of Tropical Life Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/tls.11.01.10

Abstract

The objective of the paper were to identify factors related to conservation strategy of Anaphalis in BTSNP. This study found internal factor related to strength includes the existence of species and value of Anaphalis spp., while the weaknesses include increase of habitat degradation and disturbance caused by tourism activities. The opportunities for conservation includes support of policy in biodiversity conservation and increase of ecotourism movement, while the threats aspect include less control of land uses changes and increase of mass tourism. The SWOT analyses recommends some significant strategy which are derived from combination of enhancing strength to optimizing opportunities, reducing weaknesses and optimizing opportunities, Enhancing strength to reduce threats and managing weaknesses to manage risk.  
in silico Study Reveals Potential Docking Sites of δ 2-isoxazolines derivates for Inhibiting Russell’s Viper PLA2 Toxin Tsaniyah Nur Kholilah; Nashi Widodo; Nia Kurniawan
Journal of Tropical Life Science Vol. 11 No. 1 (2021)
Publisher : Journal of Tropical Life Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/jtls.11.01.06

Abstract

Snake venom phospholipase A2s (svPLA2s) has been known as the most abundant component and predominant cause of Russell’s viper envenomation. Limitation to serum therapy and considerable pharmacological interest led the researcher to synthesized multi-toxic PLA2 inhibitors, δ2-isoxazolines derivate. Although δ2- isoxazolines derivate already proved inhibitor activity in Group II svPLA2 with known IC50, their mechanism of action remains unveiled. Our recent study investigated their inhibitory activity via molecular docking. The virtual screening revealed that the ligand with diverse structures tied to the relatively same active site region. The result sheds light on the significance of His48 and Asp49 as part of the pro-inflammatory eliciting region. ADME analysis was also performed to filter and identify the best potential inhibitor acceptable for human use. This moiety leads to finding a better therapeutic strategy of svPLA2 inhibitors both as an alternative to serum anti-venom treatment.
Evaluation on the Legal Trade of Tokay gecko (Lacertidae; Gekkonidae; Gekko gecko Linnaeus, 1758) in Indonesia Ari Ardiantoro; Amir Hamidy; Nia Kurniawan
Journal of Tropical Life Science Vol. 11 No. 1 (2021)
Publisher : Journal of Tropical Life Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/jtls.11.01.12

Abstract

Tokay gecko (Gekko gecko) is a large-sized gecko from the genus of Gekko, which is most commonly found from South Asia, southern China, and Southeast Asia. In Indonesia, these species are common to inhabit human-modified habitat in Sumatera, Borneo, Java, Bali, Lesser Sundas, Sulawesi, and Moluccas. In recent years, the demand for Tokay gekko with high use-value in both national and international markets has increased, one of which is used for traditional medicine. This situation raised the concern on the decreasing of the wild population and the validity of captive breeding programs that produced a large number of individuals. Several reports had estimated millions of individuals have been exported from Indonesia either legally or illegally, however, the exact number never been reported. The purpose of this study is to evaluate the trend on the harvested Tokay gecko and its origin based on the source code information. The data were collected from government records, including specimens harvested from the wild and specimens produced from captivity during 2013 - 2018 (six years). The results showed that the legally exported specimens were sourced from wild (W) and captive breeding (C or F). The total numbers of individuals exported from the wild harvest are 97.146, and all export realization is below the wild harvest quota. However, there are the large numbers of individuals exported and declared as specimens produced from the captive breeding facilities (6.965.000 with source code F, and 1.236.000 with source code C). More importantly, the high level of specimens produced from captive breeding facilities is unlikely to match with the biological capacity of this species. Therefore, we predict that specimens labeled captive breeding were likely sourced from the wild.
Isolation and Characterization of Fungi strains associated with Mycotoxin Production from Bambara (Vigna subterranea (L) verdc) nuts Recovered in Nigeria Simeon Kolawole Odetunde; Stephen Oyedele Fapohunda; Segun Gbolagade Jonathan
Journal of Tropical Life Science Vol. 11 No. 1 (2021)
Publisher : Journal of Tropical Life Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/jtls.11.01.04

Abstract

Fungal contamination of food commodities is a global food security challenge that impacts negatively on the health of consumers. Mycotoxins are produced as secondary metabolites by some pathogenic fungi and may contaminate agricultural products while on the field or during harvesting and storage. A field survey was conducted in order to isolate and identify the mycotoxin producing fungal strains in Bambara nuts collected from major markets in eight States in Nigeria. Samples per site were pooled, processed and screened for the presence of mycotoxin-producing fungi by culture technique and intergenic spacer sequencing (ITS).  Mycotoxin production was determined using thin layer chromatography (TLC) with scanning densitometer.  Twenty-four producing fungal strains: Talaromyces pinophilus, Macrophomina phaseolina (6), Fusarium oxysporum (2), Aspergillus foetidus, Aspergillus flavipes, Rhizopus oryzae (2), Phanerochaete chrysosporium, Aspergillus flavus (2), Aspergillus terreus, Aspergillus awamori, Aspergillus welwitschiae, Rhizopus microsporus, Ceriporia lacerate and Fusarium verticillioides (accession numbers of MN42329-MN4233323) were identified from Bambara nuts. The genera Macrophomina were the most dominant.  Some of the identified fungi are noted for the production of mycotoxins and mycotoxins exert toxic effects on animals and humans. The fungi associated to Bambara nut diseases were identified and can be taken as targets in varietal improvement of Bambara nut for resistance to fungal diseases in Nigeria.
COVID-19 to Curb Positive Climate and Negative Recession Vasudeo Pandharinath Zambare
Journal of Tropical Life Science Vol. 11 No. 1 (2021)
Publisher : Journal of Tropical Life Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/jtls.11.01.15

Abstract

A novel coronavirus originated COVID-19 a pandemic disease that is rapidly progressing and spreading the infection and death cases thorough out the globe [1-2]. It's an alarming situation for an individual's survival. As a remedial action, many countries opted for curfews or lockdown and serious actions were taken by the government to stop the spreading of novel coronavirus by shutting down private industries, schools, offices, and many more nonessential businesses. The outcome of lockdown resulted in almost negligible use of polluting vehicles, and industries which has direct setbacks on the global economy.            The lockdown option showed a positive impact on health by minimizing the risk of COVID-19 infectivity as well as environmental rejuvenate in terms of tremendous improvement in air quality, sound pollution reduction, and ultimately the ozone layer healing. Thus, a precautionary measure taken against pandemic disease COVID-19 would have a positive impact on climate change at the global level. The financial activity has caught up and stock markets have to plummet alongside the declining environmental pollution including carbon emissions, sound, and natural water resources. It's the precise opposite of the drive towards a sustainable economy that many have been a campaigner for the future. But, a negative setback of COVID-19 toll of early deaths of family belongings, food scarcity, loss of jobs, struggle to earn the daily bread, family security, homesick and mental sickness.  The widespread job losses would be in danger the income source of millions as businesses are struggling to cope with the limitations being put in place to control the deadly coronavirus during the lockdown period.            Thus, I urge every national, public-private organization, research institutes to take early remedial strategies for the negatively affected community surveillance, health encouragement, education, food security, and job opportunities to control the 21st century’s biggest recession [3]. COVID-19 impacted improvement in the environmental air and water quality is a natural healing process and all nationals must maintain it in the future by adopting good hygiene and behavioral practices.
The Dynamic of Calcium Oxalate (CaOx) in Porang Corms (Amorphophallus muelleri Blume) at Different Harvest Time Nurul Chairiyah; Nunung Harijati; Retno Mastuti
Journal of Tropical Life Science Vol. 11 No. 1 (2021)
Publisher : Journal of Tropical Life Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/jtls.11.01.05

Abstract

The research aims to observe the influence of harvesting time on the change of calcium oxalate (CaOx) content and crystal density in Porang corms. The corms were harvested at different times, i.e., (1) two weeks before the plants shed (R0-1), (2) when the plants shed (R0), and (3) two weeks after the plants shed (R0+1). CaOx was obtained using the modified extracting method. Microscopic observations were obtained from the slices of the edge and center part of porang corms. Parameter observed including CaOx content, corm weight, shape, and density of CaOx crystal. CaOx content and crystal density in corms were analyzed using One way ANOVA. If the results are significant, it will be followed by Tukey Test α 0.05. In the meantime, the relation between CaOx content and corm weight was analyzed using Correlation Test Bivariate. The results showed that CaOx content was relatively higher in porang corms, i.e., 15.98 ± 0.60g/100g. On the other hand, the increasing of CaOx content might improve corm weight. The total density of druse, styloid, and prism crystal was pretty high in corms obtained when the plants shed compared to another harvest time, i.e., 1,494 ± 286; 31,280 ± 17,406 and 6,256 ± 1,533 crystals/cm2 . Raphide crystal density, by contrast, increased in corms obtained after the plants shed, i.e.,1,656 ± 368 crystals/cm2 . Total CaOx crystal density in the edge parts of corms harvested when the plants shed was proportionately higher than in the other harvest times, i.e., 12,292 ± 4,687.89 crystals/cm2 . In contrast, CaOx crystal densities in the center parts of corms were not much different at three harvesting times. The density of druse and prism crystals was somewhat higher in the center part of corms than in the edge parts. In opposition to, the density of raphide and styloid crystals was fairly higher in the edge part of corms than it was in the center parts. However, only raphide crystal density found in the edge and center part of corms was significantly affected by harvest time from all these results.
Ethnobotany of three sea grass species from Port Blair, a step towards its conservation in Andaman Islands Mohammed Naufal PJ; G Padmavati
Journal of Tropical Life Science Vol. 11 No. 1 (2021)
Publisher : Journal of Tropical Life Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/jtls.11.01.02

Abstract

Ethno-phycology is the study of the relationships of human society to flora and its ecosystem. In the marine world, ethno-biology is a thriving area of research which have yielded valuable ethno-biological knowledge. The main goal of the present study was to understand the effect of abiotic factors as well as the natural and anthropogenic disturbances that shape seagrass community in Andaman Island and to reveal the knowledge of the local people, about the significance of seagrass habitat and its conservation. The qualitative study on distribution of seagrasses in Chidiyatapu (11° 29' 30" to 11° 30' 34" N and 92° 35' 10" to 92° 42' 30" E) was carried out during December2012 to February 2013. A total of three seagrass species such as Thalassia hempirichi (Ehrenberg) Ascherson, 1871, Halodule uninervis  (R.Brown) J.D.Hooker 1858, Halophila ovalis (Forsskål) Ascherson 1882, where identified. Among them, T. hempirichi, and H. ovalis found in this study was reported to have the ethno-medicinal value from west coast of India. As a part of the study, the  semi-structured survey was carried out among the local coastal people to analyse the Traditional Ecological Knowledge (TEK). The survey has revealed the  unawareness of  coastal residents about the medicinal, nutritional as well as conservational values of seagrasses. An effective implementation has to be taken to make them aware that seagrasses are fundamental components of healthy marine ecosystems and the local livelihoods that rely on them. The present findings provide the first report on the ethno-phycology of seagrasses from South Andaman Island.
ISOLATION OF THERMOPHILIC LIPASE PRODUCING BACTERIUM FROM HOT SPRINGS AT THE EAST COAST OF PENINSULAR MALAYSIA Tengku Haziyamin Tengku Abdul Hamid; Nur Asimah Zainal Abidin; Nurmusfirah Hasan
Journal of Tropical Life Science Vol. 11 No. 1 (2021)
Publisher : Journal of Tropical Life Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/jtls.11.01.01

Abstract

Hot spring is a natural habitat for thermophilic bacteria and is the major source of thermostable enzymes useful in industrial application. In Malaysia, the search for thermophilic organisms have been focused on hot springs especially on the west coast of the peninsular. In this work, lipase producing thermophilic microorganisms were isolated from east coast hot springs in the states of Pahang and Terengganu. All of the 7 isolates showed the ability to grow at 45°C and formed lipolytic zones on tributyrin agar plates. However, only isolate B2B2 and S1B4 were able thrive at higher temperatures of up to 65°C. Bacillus and Geobacillus species was found to be the dominant bacterium isolated from these hot springs. From La hot spring, isolate L1 (MT 645486), LH2, (MT645483), LH3 (MT645484), LH4 (MT 645485) and LH5 (MT 645487) were all closely related to Bacillus sp. (94 to 97%). Meanwhile, from Bentong and Sungai Lembing hot springs, isolates B2B2 (MT668631) and S1B4 (MT668632) were closely related to Geobacillus kaustophilus (98.5%) and Geobacillus thermoleovorans (98%), respectively. Strains from Geobacillus sp. were able to thrive at higher temperature and their thermostable lipases have properties useful for biotechnological applications.

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