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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 15 Documents
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Search results for , issue "Vol 11, No 2 (2021)" : 15 Documents clear
Diversity of Foliar Endophytic Fungi in Artocarpus heterophyllus Lam. and Citrus reticulata Blanco of Tripura Bhattacharya, Sanchita; Debnath, Sanjit; Saha, Ajay Krishna
Journal of Tropical Life Science Vol 11, No 2 (2021)
Publisher : Journal of Tropical Life Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/jtls.11.02.15

Abstract

Present investigation dealt with the isolation and diversity of foliar fungal endophytes from two fruit yielding plants of Tripura state. Seasonal distributions of endophytes in respect to fruiting and non-fruiting season in two host plants were also studied. Twenty one fungal strains along with one nonsporulating hyaline form were isolated as foliar endophytes from the two host plants. In both fruiting and non-fruiting seasons, from Citrus reticulata seven foliar endophytic fungi were isolated. Whereas from Artocarpus heterophyllus in both the season eleven fungal endophytes with one nonsporulating hyaline form were isolated. The relative frequencies of isolated fungi from both A. heterophyllus and C. reticulata in fruiting and non-fruiting season significantly differed among the sampling sites, whereas relative frequencies individual endophytic fungus showed no significant differences among various sampling sites.
Diversity of Pteridophytes in Mount Timolan Protected Landscape, Zamboanga del Sur, Philippines Cudal, Maricris G; Calimbo, Liberty Grace L; Jr, Diosdado Sumibay; Salise, Jaidel; Gomez, Jessa; Pagaling, Meraflor; Locson, Jasper; Cahayagan, Joel; Seno, Jernol; Daculio, Jahuel Nathan
Journal of Tropical Life Science Vol 11, No 2 (2021)
Publisher : Journal of Tropical Life Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/jtls.11.02.05

Abstract

This study serves as the first generation research on the rich yet not poorly known ferns and lycophyte species of the Mount Timolan Protected Landscape (MTPL). A total of 151 species from 62 genera and 24 families were recorded from December 2019-May 2019. Overall, the species of MTPL respectively holds 14%, 40% and 71% of the recorded total species, genera and families of ferns and lycophytes in the Philippines. The most represented families in terms of the number of genera is Polypodiaceae (10 spp.), whereas, the most represented genera in terms of the number of species were Selaginella (11 spp.). The results of the study showed that Mount Timolan Protected Landscape harbours number of some endemic species (17 spp.), critically endangered species (1 spp.), endangered species (3 spp.), vulnerable species (5 spp.), threatened, non-native species and economically important species (25 spp.). Based on conservation and ecological status of assessed ferns and lycophyte species, it is likely to strongly suggest to set species-specific conservation management strategy to protect the threatened species. However, additional studies and thorough field explorations should also be done to conduct a re-inventory on the pteridophyte species in order to arrive a more scientific results to establish a real profile of the ferns and lycophyte species of Mount Timolan Protected Landscape.
The expression of OsPLA2-III and OsPPO genes in rice (Oryza sativa L.) under Fe toxicity stress Turhadi, .; Hamim, .; Ghulamahdi, Munif; Miftahudin, .
Journal of Tropical Life Science Vol 11, No 2 (2021)
Publisher : Journal of Tropical Life Science

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Abstract

Lipid is an important biomolecule in plant because of their structural and functional roles in plant cells. Moreover, lipid could be a signal molecule in defense system of plants under biotic and abiotic stresses. Detoxification process of toxic substances, which is one of the defense system and controlled by various genes, plays an important role in tolerance mechanism in plant under stress conditions, including iron (Fe) toxicity. Plants develop various tolerance strategies to cope the Fe toxicity. The objective of this research was to investigate the expression of OsPLA2-III and OsPPO genes under Fe stress condition. Two-weeks-old seedlings of two rice varieties, i.e., IR64 (Fe-sensitive toxicity) and Pokkali (Fe-tolerant toxicity) were used. Both varieties were treated with 1 (control) and 400 ppm of Fe in the form of FeSO4.7H2O in the nutrient culture solution. The leaf bronzing, chlorophyll content, and relative expression of OsPLA2-III and OsPPO genes were observed. An in-silico study was also performed to predict the interaction between OsPLA2-III and OsPPO proteins. The results showed that the Fe toxicity induced leaf bronzing, reduced leaf chlorophyll content, and increased the OsPLA2-III and OsPPO gene expression levels. Both genes are suggested to have a role in plant tolerance mechanism during Fe toxicity stress via lipid signaling pathway.
Predominant Bacterial Diversity in Rheumatoid Arthritis Rat After Treated with Caprine CSN1S2 Protein Suyanto, Eko; Fatchiyah, Fatchiyah
Journal of Tropical Life Science Vol 11, No 2 (2021)
Publisher : Journal of Tropical Life Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/jtls.11.02.01

Abstract

Introduction: Rheumatoid arthritis (RA) is an autoimmune and systemic inflammatory disease influenced by microbial abnormalities (dysbiosis) in the intestinal that affect changes in metabolism and immune system disorders. This study aimed to investigate the predominant intestinal microbiota in complete Freund’s Adjuvant-induced rheumatoid arthritis rats after treated with caprine milk CSN1S2 protein through fecal analysis based on PCR-DGGE and to construct the phylogenetic tree of bacteria as the evolutionary relationship. Method: The experimental animals were divided into 6 groups with 2 types of rat model, namely control rat (C group, CM group, and CY group) and RA rat (RA group, RAM group, and RAY group). Predominant cultivable microbiota was obtained by direct culture and analyzed using PCR-DGGE with some specific primers. The DNA sequences were analyzed and aligned using bioinformatics software to construct the phylogenetic tree. Results: We found that Lactobacillus group significantly increased in the control rat model and the predominant intestinal bacteria in RA rats were Enterococcus group (Enterococcus faecium and Enterococcus faecalis). Conclusions: The caprine milk CSN1S2 protein influences the composition of microbiota in RA rats with the emergence of predominant bacteria that are considered species of the Bacillus group, closely related to Bacillus coagulans, which can be promoted the growth of B. coagulans to suppress pathogenic bacteria in the development of RA disease.
ROLE OF ACADEMIC INSTITUTION TO INFORM REGIONAL-SCALE BIODIVERSITY CONSERVATION IN THE EASTERN PHILIPPINES Guerrero, Jonathan Jaime G; Tanalgo, Krizler C; Abante, Carlo Gabriel R
Journal of Tropical Life Science Vol 11, No 2 (2021)
Publisher : Journal of Tropical Life Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/jtls.11.02.14

Abstract

The Philippines is among the most threatened biodiversity hotspots. Developing effective conservation requires science-based evidence from field data and observations. Yet, many important biodiversity information remain unpublished, particularly from academic institutions and NGOs. Here, we synthesized 34-year data from biodiversity studies from Bicol University in Luzon Island, Philippines. We found a large number of studies that increased in the post-2000 period with the majority of the studies focused on community surveys and animal and wildlife studies. While there is a massive number of studies, we found clear disproportionate distribution in terms of geographic and thematic areas. Our results may be based on a regional level, but if taken carefully, it has important implications and applications to other higher education institutions in the Philippines in promoting biodiversity studies and conservation in the country.
Potency of Endophytic and Rhizospheric Bacteria of Akar Kucing (Acalypha indica Linn.) as Antibacteria against Klebsiella pneumoniae Rahmawati, Fitriana Dewi; Suharjono, Suharjono
Journal of Tropical Life Science Vol 11, No 2 (2021)
Publisher : Journal of Tropical Life Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/jtls.11.02.06

Abstract

ABSTRACT Prevalence of pneumonia in Indonesia was 2% in 2018. Treatment of pneumonia using antibiotics caused resistant of pathogenic bacteria. Endophytic and rhizospheric bacteria of Acalypha indica Linn. can be used as alternative for treatment of pneumonia. This study aims to analyze the potency and identify of endophytic and rhizospheric bacteria of the Acalypha indica Linn as an antibacteria of Klebsiella pneumoniae. The research included isolation and purification of endophytic and rhizospheric bacteria of the Acalypha indica Linn, antagonistic assay of bacteria cell culture, antibacterial assay of bacteria metabolites; and identify of potential isolates based on 16S rDNA sequence similarity. The results showed that number of rhizosphere bacteria 6.83 x 105 CFU/gram was more than endophytic bacteria 1.78 x 104 CFU/gram. Diversity of rhizosphere bacterial 0.72 was higher than endophytic bacteria 0.62. The rhizospheric bacteria RU112B and RU315B had highest activity to inhibit growth of Klebsiella pneumoniae. Both isolates RU112B and RU315B were identified as Staphylococcus saprophyticus with similarity 99.83% and Luteimonas terrae with similarity 99.67% respectively. Keywords: Acalypha indica Linn, endophytes, Klebsiella pneumoniae, rhizosphere
Radiation sterilization of Honey and Honey-Alginate Wound Dressing from Stingless Bee (Tetragonula biroi) Collected from Sta. Maria, Laguna, Philippines Baldos, Davison Torres; Puno, Joseph Mallari; Tolentino, Levelyn Mitos Mesa; Montefalcon, Djowel Recto Villanueva; Diano, Gilberto Tura; Asaad, Celia Oprenario
Journal of Tropical Life Science Vol 11, No 2 (2021)
Publisher : Journal of Tropical Life Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/jtls.11.02.11

Abstract

This study was conducted to determine the effect of radiation sterilization on alginate wound dressing containing honey from the Philippine stingless bee, Tetragonula biroi. Our results show that a radiation dose of 30 kGy did not affect the antibacterial property of honey against Staphylococcus aureus. Electron-beam irradiation did not produce significant alterations in the physicochemical properties (pH, total soluble solids, and flavonoids); however, the total phenolics was significantly increased in honey with higher irradiation doses. Demonstrating that irradiation can be applied to honey with negligible physicochemical effects, honey was incorporated in alginate and exposed to a sterilization dose of 25 kGy using an electron beam facility.  Irradiation did not affect the physicochemical properties (pH, moisture content, gel fraction, moisture vapor transmission rate (MVTR), and fluid handling capacity) of the honey alginate wound dressing (HAWD). The perspectives for the potential use of irradiated HAWD as a natural product-based substitute for commercial wound care products may be considered.
In vitro antagonistic study of maize root colonizing fungal isolates against Fusarium moniliforme causing ear rot disease of maize Mandal, Parimal; Tiru, Zerald; Sarkar, Monalisha; Chakroborty, Arka Pratim; Pal, Ayon
Journal of Tropical Life Science Vol 11, No 2 (2021)
Publisher : Journal of Tropical Life Science

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Abstract

In the present study, different root colonizing fungal isolates were isolated from the rhizospheric soil of maize growing areas of Uttar Dinajpur, West Bengal. All the isolates including test pathogen were identified from Indian Type Culture Collection, New Delhi. Plant growth promoting maize root colonizing fungal isolates- Penicillium pinophilum (ITC NO. 11,201.19), Trichoderma harzianum (ITC NO.11,203.19), Trichoderma asperellum (ITC NO. 11,209.19), Aspergillus niger (ITC NO. 11,204.19) and Penicillum purpurogenum (ITC NO. 11,207.19) exhibited antagonistic activities against F. moniliforme (ITC NO. 11,208.19) in vitro. Two antagonistic isolates of T. harzianum and eleven strains of T. asperellum showed antibiosis mechanism for antagonism against F. moniliforme with the range of Percent Inhibition of Radial Growth from 62.41% to 88.57%. Competitive mode of antagonism against test pathogen by the isolates of P. pinophilum, P. purpurogenum and six isolates of A. niger were found. Percent of inhibition of radial growth ranged from 57.14% to 91.42%. 
Comparative Study of Morphology and Histology on Papuan Jellyfish Mastigias papua in Kakaban Lake and Sea Nurasmi, Nurasmi; Ridwan, Ahmad; Awaludin, Awaludin
Journal of Tropical Life Science Vol 11, No 2 (2021)
Publisher : Journal of Tropical Life Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/jtls.11.02.07

Abstract

Jellyfish are marine invertebrates belonging to the phylum Cnidaria. Papua Mastigias is a jellyfish from the Scyphozoa class. This study aims to observe differences in the differences in environmental parameters, morphology and shape of nematocyte cells using the histological method with (SEM) Scanning Electron Microscopy on Papua Mastigias jellyfish in the Kakaban Lake and Sea. Environmental parameters in Lake Kakaban and Sea Kakaban were measured for salinity, temperature, and pH. The results of the t-test analysis showed that there were significant differences in environmental parameters in Lake Kakaban and Sea Kakaban (p <0.05). Body diameter and length of jellyfish tentacles were measured and analyzed using SPSS 16 with a t-test. From the t-test analysis, results showed that for Mastigias Papua jellyfish in Lake Kakaban and jellyfish in the Kakaban Sea showed a significant difference in the diameter and length of the body tentacles (p <0.05). The SEM results of jellyfish in the Kakaban Sea showed that the tentacles of Mastigias Papua in the Kakaban Sea had nematocytes consisting of three forms, namely Microbasic isorhiza, Atrichouz isorhiza, and Merotrichous isorhiza. Mastigias Papua in Lake Kakaban has nematocyst cells, which comprise of one type, namely Microbasic mastigophoran, where the number of nematocytes is minimal and has a smaller size than the Papuan Mastigias jellyfish that live in the Kakaban Sea. Nemeatocyte cells are stinging cells in jellyfish. SEM results show that the jellyfish in Lake Kakaban cannot sting because the size of the jellyfish tentacles is reduced to smaller, fewer nematocyte cells and different shape nematocytes. Based on the results of this study, it can be concluded that there are differences in environmental parameters, body dimensions, tentacle length, and the size and number of nematocytes between Mastigias Papua jellyfish in Dunau and in the Kakaban Sea.
Post-Covid-19 Pandemic Awareness on The Use of Micro- and Nano Plastic and Efforts into Their Degradation - A Mini Review Wiratno, Ekwan Nofa; Rozdhl, Amira Azawani Mohd; Hanafi, Nafizatun Eliana Ali; Redzuan, Rabiatul Alia; Huyop, Fahrul Zaman
Journal of Tropical Life Science Vol 11, No 2 (2021)
Publisher : Journal of Tropical Life Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/jtls.11.02.12

Abstract

Micro- and nanoplastic pollution possess a global threat and cause a future problem and needs greater attention. Its pollution is also exacerbated recently by the use of abundance of plastic polymers in efforts to prevent and handle COVID-19 pandemic at the global scale. This review covered the major concerns about the characteristic, effect and bioremediation of micro- and nanoplastics of post COVID-19. Based on size, microplastic is described as debris particles smaller than 5 mm whereas, nanoplastic is referred to any particles smaller than 100 nm. Micro- and nanoplastic are easily ingested by many aquatic organisms at different trophic levels. This ingestion caused negative health impacts to all living organisms. Microplastic direct effect on living organism for example mechanical injury, false satiation, declined growth, promoted immune response, energy loss, disrupted enzyme activity and production, decreased fecundity, production of oxidative stress, and mortality. Nanoplastic could enter the circulatory system and caused negative effects on the cellular and molecular levels. Bioremediation of microplastic by magnoliophyta, bacteria, fungus and algae on several polymer forms was previously reported, however, not many on nanoplastic biodegradation. Therefore, current review will focus on the characteristics, effect and bioremediation effort of micro- and nanoplastic.

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