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All Journal Jurnal Sumberdaya Hayati Biosaintifika: Journal of Biology & Biology Education
Toyoshi Yoshiga
Department of Applied Biological Sciences, Saga University, Saga 840-8502, Japan
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Immunology & microbiology

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First Record of Free-Living Nematode Mylonchulus hawaiiensis from Bondowoso Regency-Indonesia Ankardiansyah Pandu Pradana; Toyoshi Yoshiga
Jurnal Sumberdaya Hayati Vol. 9 No. 1 (2023): 2023
Publisher : Departemen Biologi, Institut Pertanian Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jsdh.9.1.17-23

Abstract

Monochids are predatory nematodes that can be found in various ecosystems. In this study, we analyzed monochids from the rhizosphere of Arabica coffee in Bondowoso Regency-Indonesia. The morphological analysis showed that the nematode belonged to the Mylonchulus hawaiiensis (Cassidy, 1931) species. The analysis results were also confirmed by a molecular analysis using DNA from a single nematode. The study also involved a polymerase chain reaction process using a forward primer SSU F07 (5’-AAA GAT TAA GCC ATG CAT G-3’) and reverse primer SSU R 81 (5’-TGA TCC WKC YGC AGG TTC AC-3’), which amplifies the small subunit (SSU) region of rDNA. Phylogenetic analysis of the sequence obtained formed a cluster with those of M. hawaiiensis found in GenBank. The sequences obtained had homology ranging from 99.64 to 99.70% compared with M. hawaiiensis sequences found in GenBank. This study is the first report of M. hawaiiensis from Indonesia.
First Record of Free-Living Nematode Ironus dentifurcatus Argo & Heyns, 1972 (Ironidae: Enoplida) From Indonesia Ankardiansyah Pandu Pradana; Toyoshi Yoshiga
Biosaintifika: Journal of Biology & Biology Education Vol. 17 No. 1 (2025): April 2025
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/biosaintifika.v17i1.20990

Abstract

Free-living nematodes often serve as the bioindicators of environmental quality. These nematodes are highly sensitive to even minute changes in the environment. Studies related to the presence of free-living nematodes have flourished, but to date, only a few studies have investigated the morphological and molecular characterization of free-living nematodes from agroecosystems in Indonesia. This study aimed to characterize the free-living nematode Ironus spp. from the rhizosphere of Arabica coffee plants in Bondowoso Regency, Indonesia. Nematodes were extracted from the soil using the white-head tray method and then preserved in a DESS solution to maintain their morphology and DNA. The morphometric analysis of Ironus species obtained in this study showed that the nematode species is identical to Ironus dentifurcatus. The small subunit (SSU) region of rDNA of the nematode was successfully amplified using primers (SSU F07 and SSU R 81). The results of phylogenetic analysis and sequence homology showed that the sequence in this study showed up to 95% homology to Ironus spp. In the database. This is the first study documenting I. dentifurcatus in Indonesia that integrates morphological and molecular characterization.
Co-Authors Ankardiansyah Pandu Pradana Ankardiansyah Pandu Pradana