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Journal : IJEMS (Indonesian Journal of Environmental Management and Sustainability)

Phylogenetic Analysis Of Endophytic Fungi Isolate from Bellucia pentamera Naudin Based On ITS rDNA Andika Puspita Dewi; Elisa Nurnawati; Laila Hanum; Hary Widjajanti
Indonesian Journal of Environmental Management and Sustainability Vol. 3 No. 4 (2019): December
Publisher : Research Centre of Inorganic Materials and Complexs

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2136.099 KB) | DOI: 10.26554/ijems.2019.3.4.100-106

Abstract

Endophytic fungi can produce secondary metabolites of endophytic fungi isolated from host plants. The purpose of this study is to identify and analyze the sequencing of endophytic fungi isolates with ITS and Beta-tubulin markers and phylogenetic trees. The endophytic fungi isolate DKJ1, DKJ3a, DKJ3c and DKJ4 were successfully isolated from the cardia plant (Bellucia pentamera Naudin) indicated by Aspergillus niger group, Aspergillus fumigatus group and Penicillium sp. The results of the sequencing analysis of isolates DKJ1, DKJ3a, DKJ3c, and DKJ4 were successfully amplified with an annealing temperature of 54ºC with a pair of ITS1-ITS4 primers with a molecular weight of 570 bp and a Beta-Tubulin primer with an annealing temperature of 56.1ºC molecular weight of 550 bp. From the results of identification and analysis of DNA sequencing of endophytic fungi DKJ1, DKJ3a, DKJ3c and DKJ4 with the primary pair of ITS and Beta-tubulin shows that the phylogenetic tree is different from the species obtained. ITS DKJ1 isolates have similarities with the species Aspergillus piperis CBS 112811, ITS DKJ3c has similarities with the species Aspergillus flavus var flavus strain ATCC 16833, ITS DKJ3a has similarities with Penicillium rolfsii strain NRRL 1078 species and ITS DKJ4 has similarities with Penicillium oxalicum NRRL 787 species. Whereas isolate from DKJ1 Beta-Tubulin has similarities with NRRL 4875 Aspergillus tubingensis species, DKJ3c has similarities with species of Aspergillus novoparasiticus strain DTO 223-C4 and DKJ4 has a similarity with Penicillium guaibinensis species. But there are similarities based on Cluster A (Aspergillus Group) and Cluster B (Penicillium Group) on phylogenetic trees.
Antibacterial Activity of The Secondary Metabolites Produced by Endophytic Fungi Isolated from Acanthus ilicifolius Plant Gusti Ayu Widayanti; Hary Widjajanti; Salni Salni
Indonesian Journal of Environmental Management and Sustainability Vol. 3 No. 4 (2019): December
Publisher : Research Centre of Inorganic Materials and Complexs

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2558.148 KB) | DOI: 10.26554/ijems.2019.3.4.107-116

Abstract

Twelve endophytic fungi were isolated from the Acanthus ilicifolius plant. Two of them have the best antibacterial activity, namely Culvularia lunata and Diaporthe phaseolorum. Fungi can produce secondary metabolites that have the potential as antibacterial compounds. This study aims to isolate antibacterial compounds using column chromatography methods and test the antibacterial activity using diffusion methods to use paper discs. Isolation of secondary metabolites produces 27 eluates. From TLC, it is known that the endophytic fungi Culvularia lunata produce an active compound as an antibacterial that is phenol compound. Endophytic fungi Diaporthe phaseolorum produces three types of active compounds as antibacterial namely phenol, terpenoids, and alkaloids, each component of the active compound are tested for sensitivity to bacterias Escherichia coli, Staphylococcus aureus, Shigella dysenteriae, and Salmonella typhi. MIC values ??of terpenoid compounds with concentrations of 125-250 ppm are antibacterial compounds with good activity against Escherichia coli, Staphylococcus aureus, Shigella dysenteriae, and Salmonella typhi.
Biodegradable Plastics: Biodegradation Percentage and Potential Microplastic Contamination in Seawater Permana, Muhammad Aditya; Widjajanti, Hary; Rohendi, Dedi
Indonesian Journal of Environmental Management and Sustainability Vol. 7 No. 2 (2023): June
Publisher : Magister Program of Material Science, Graduate School of Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/ijems.2023.7.2.74-79

Abstract

Increasing plastic production, which causes the problem of plastic garbage polluting the oceans, has increased the use of biodegradable plastics to address the problem. However, it is still debatable how much microplastic contamination it can cause. So, this study aims to determine the proportion of biodegradable plastics in the marine environment, identify the microplastics it produces, and analyze the relationship between the two. Seawater sampling is located in the Bangka Strait. The research was conducted in the Genetics and Biotechnology Laboratory, Department of Biology, Sriwijaya University. The biodegradable plastic test material used was made from a mixture of polyhydroxyalkanoates (PHA) and starch. Biodegradation test method using standard ASTM D6691-17 with respirometry system design. The stage of microplastic identification is carried out through filtration with a 4.75 mm-size filter; density separation using ZnCl2 solution and Whatman No. 1 filter paper; as well as visual observation of microplastics under a microscope. last Pearson Correlation analysis with bootstrap to see the relationship of the percentage of biodegradation with microplastics. The results obtained in this study were the percentage of biodegradable plastic (26.5±1.4%) and positive control kraft paper (33.2±4.2%) for 70 days, which produced 9 microplastic particles from biodegradable plastic with fragment and film types. Correlation analysis concluded that there was no relationship between the percentage of biodegradation and the microplastics produced.