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All Journal HAYATI Journal of Biosciences Biotropika Jurnal Sumberdaya Hayati Jurnal Riset Biologi dan Aplikasinya Jurnal Abdimas Berdaya : Jurnal Pembelajaran, Pemberdayaan dan Pengabdian Masyarakat Bioeksperimen
Suryanti, Erma
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In Vitro Evaluation of Phosphate-Solubilizing Bacteria as Antagonists for Bacterial Leaf Blight Disease (Xanthomonas oryzae pv. oryzae) Asril, Muhammad; Suryanti, Erma; Agus Rini, Ika
Jurnal Riset Biologi dan Aplikasinya Vol. 6 No. 1 (2024)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jrba.v6n1.p34-40

Abstract

Rice is an important food crop in Indonesia, where more than 50% of the Indonesian population consumes rice as a staple food. Rice has decreased productivity by 50-80% due to bacterial leaf blight caused by Xanthomonas oryzae pv. oryzae (Xoo). The rapid spread and damaging effects of pesticide use on the environment are the main obstacles in the treatment of these bacteria. Alternative control is to use biological agents in the form of phosphate solubilizing bacteria (PSB). Phosphate-solubilizing bacteria are part of the growth-promoting bacteria that have other abilities, namely biocontrol. The purpose of this study was to develop the ability of acid soil phosphate solubilizing bacteria to inhibit growth in vitro. The test was carried out using the dual culture technique with the zone of inhibition method. The results showed that ten isolates of PSB had inhibition against Xoo with various diameters of inhibition. The four highest inhibitory isolates were EF.NAP 3 (5.267 ± 0.189 mm), Pseudomonas GSP 6 (4533 ± 0.772 mm), EF.NAP 4 (3,424 ± 0.161 mm) and EF. NAP 9 (3.167±0.136 mm). The ability of PSB to inhibit Xoo can be used as an alternative in controlling bacterial leaf blight in rice plants. This indicates that the PSB isolate acts as a biostimulant in the dissolution of phosphate in the soil and as a bioprotectant.
Isolasi dan Karakterisasi Bakteri Rhizobium asal Bintil Akar Tanaman Kacang Tanah (Arachis hypogaea) dan Koro Rawe (Mucuna bracteata): Isolation and Characterization of Rhizobium Bacteria from Root Nodules of Peanut Plants (Arachis hypogaea) and Koro Rawe (Mucuna bracteata) Nabilla, Alnovara Yuan; Prastya, Muhammad Eka ; anggria sari, Dian; Suryanti, Erma
Jurnal Sumberdaya Hayati Vol. 10 No. 4 (2024): 2024
Publisher : Departemen Biologi, Institut Pertanian Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jsdh.10.4.175-182

Abstract

Nitrogen (N) is naturally available in the form of N2. Nitrogen fixation can be facilitated by microbes such as Rhizobium bacteria, which can establish symbiosis with the roots of legume plants to form root nodules that perform nitrogen fixation. This study aims to determine the characteristics of Rhizobium bacteria in the root nodules of peanuts (Arachis hypogaea) and koro rawe (Mucuna bracteata). The methods used in this research include collecting root nodules, isolating Rhizobium bacteria, and identifying and characterizing these bacteria for their nitrogen fixation and phosphate solubilization capabilities. Characterization results on YEMA + Congo red media indicated that 10 out of 16 isolates from peanut root nodules and 30 out of 55 isolates from koro rawe root nodules were positive for Rhizobium bacteria. The nitrogen fixation activity test revealed that only 4 isolates from peanut root nodules and 6 from koro rawe root nodules exhibited nitrogen fixation ability in Jensen's medium. The highest phosphate solubilization index was obtained from isolate KK.5.1.1 (0.5±0.08), while the lowest was from isolate KK.5.2.2 (0.09±0.06). This research underscores the significance of Rhizobium in enhancing nitrogen availability and phosphate solubilization for legume plants.
Evaluation of Antibacterial and Antibiofilm Effects from Soil Streptomyces spp. against Multidrug-Resistant Bacteria Prastya, Muhammad Eka; Simbolon, Sumihartati; Priyanto, Jepri Agung; Hasidu, La Ode Abdul Fajar; Permatasari, Vera; Primahana, Gian; Dewi, Rizna Triana; Kristiana, Rhesi; Suryanti, Erma
HAYATI Journal of Biosciences Vol. 32 No. 1 (2025): January 2025
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.4308/hjb.32.1.12-26

Abstract

The global increase in multidrug-resistant (MDR) bacterial infection has rapidly gained concern globally. This study aimed to investigate antibacterial and antibiofilm potential of 25 soil actinomycete strains against MDR strains including Escherichia coli strain M4, Pseudomonas aeruginosa strain M19, Klebsiella pneumoniae strain M19, Bacillus subtilis strain M18, and Methicillin Resistant Staphylococcus aureus (MRSA). In this study, three actinomycete isolates encoded APM-7, APM-11, and APM-21 showed a strong and broad antibacterial spectrum. The minimum inhibitory concentration (MIC) of extracts derived from these isolates was ranged from 78 μg/ml to 10,000 μg/ml. In addition, The extracts also displayed significant biofilm inhibition values ranging from 6.06 to 72.4%. Based on the results, APM-21 extract had the best antibacterial and antibiofilm activities with the strongest values against MRSA. According to the nucleotide sequencing of the 16S rRNA gene, APM-7, APM-11, and APM-21 strains possessed similar identities with Streptomyces cyaneus, Streptomyces coerulescens, and Streptomyces panayensis, respectively. Based on Liquid Chromatography Tandem-Mass Spectrometry (LC-MS/MS) analysis, two antibacterial compounds, namely rancimanycin III, and enteromycin were detected in all those three extracts. Interestingly, APM-21 extract also contained two prominent antibacterial substances including paramagnetoquinone C, and caerulomycin I, suggesting their contribution to the most potential activities. Moreover, new insights were provided into a promising candidate for use in an active compound combating strategy to control MDR bacterial strain infection.
Pelatihan Pemanfaatan Limbah Minyak Jelantah menjadi Produk Lilin Aromaterapi di Desa Pahawang, Pesawaran Khairani, Iffa Afiqa; Anbar Istiadi, Khaerunissa; Chusniasih, Dewi; Suryanti, Erma; Arliani Nur Anisa, Hida; Natalia Pardede, Desta
Jurnal Abdimas Berdaya : Jurnal Pembelajaran, Pemberdayaan dan Pengabdian Masyarakat Vol 8, No 1 (2025): Jurnal Abdimas Berdaya
Publisher : Universitas Islam Lamongan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30736/jab.v8i1.1040

Abstract

Isolation and screening of halotolerant protease-producing bacteria from Lampung fermented shrimp paste Istiadi, Khaerunissa Anbar; Ningsih; Suryanti, Erma; Imaniar, Lisana Husna
Bioeksperimen: Jurnal Penelitian Biologi March 2026
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/bioeksperimen.v12i1.14593

Abstract

Protease are class of degradative enzymes that hydrolyze proteins, breaking its peptide bond, into smaller peptides and amino acids. Microbial proteases have gained increasing attention due to its productivity and utilization in various industries. Proteolytic bacteria derived from fermented shrimp paste from Lampung have great potential to meet this need. However, studies on these bacteria are still limited, so further research is needed to explore and optimally utilize their potential. This study aims to explore the diversity of proteolytic bacteria from Lampung terasi.. The methods employed included isolation stages using Nutrient Agar supplemented with 5% and 10% NaCl (w/v), followed by proteolytic screening properties using Skim Milk Agar media. A total of 20 bacterial isolates were obtained from terasi using Nutrient Agar supplemented with 5% (w/v) NaCl, and 15 isolates were obtained from Nutrient Agar (NA)  supplemented with 10% (w/v) NaCl. Screening results showed that 85% and 67% of the isolates obtained from NA supplemented with 5% and 10% NaCl, respectively, exhibited proteolytic activity. Halotolerant bacterial isolates isolated using NA + 5% NaCl exhibited a proteolytic index ranging from 0.3 – 3.0, while those isolated with NA + 10% NaCl showed values ranging from 0.18 to 3.06. The screening results revealed that isolates BTCL5-07 and BTCL10-05 exhibited the highest proteolytic activity, with proteolytic indices of 3.0 and 3.06, respectively. These findings indicate that halotolerant bacteria from Lampung terasi represent a promising source of potential proteolytic enzymes. Further research is required to optimize enzyme production.
Effect of PGPB (Plant Growth Promoting Bacteria) and NPK Fertiliser on the Growth of Tomato Plants (Solanum lycopersicum) Infected with Fusarium sp. Suryanti, Erma; Chusniasih, Dewi; Arliani Nur Anisa, Hida; Anbar Istiadi, Khaerunissa; Restiati, Nawang; Anggria Sari, Dian
Biotropika: Journal of Tropical Biology Vol. 14 No. 2 (2026)
Publisher : Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.biotropika.2026.014.02.01

Abstract

The long-term use of NPK fertiliser harms the environment, therefore, the use of NPK fertiliser needs to be balanced with biological fertilisers. The biological fertiliser used was PGPB (Plant Growth-Promoting Bacteria) TNAP1, TNCP1, and ANAP1 isolated from pineapple plants. This study aimed to determine the antagonistic activity of TNAP1, TNCP1, and ANAP1 isolates, assess the viability oF PGPB bacteria in the carrier material (Biochar) during storage, and evaluate the effect of NPK and PGPB fertiliser combination on the growth of tomatoes (Solanum lycopersicum) infected with Fusarium sp. This study conducted antagonism tests between PGPB isolates, PGPB antagonism with Fusarium sp. in vitro, formulation of PGPB fertiliser on the carrier material, viability test of bacteria, Fusarium sp. infection in tomato plants, fertilisation, and observation. The observed growth parameters were plant height, number of leaves, number of flowers, number of fruits, and chlorophyll content. The results of this study showed that the three bacterial isolates had synergistic properties, the viability of PGPB bacteria was above 107 CFU/g and met the requirements of the Regulation of the Ministry of Agriculture No. 70 of 2011, and the P2 treatment with a combination of fertilisers (50% NPK + 50% PGPB) gave the best results for all growth parameters and did not differ significantly from the positive control.
Co-Authors Agus Rini, Ika Anbar Istiadi, Khaerunissa anggria sari, Dian Arliani Nur Anisa, Hida Asril, Muhammad Dewi Chusniasih Hasidu, La Ode Abdul Fajar Iffa Afiqa Khairani Imaniar, Lisana Husna Jepri Agung Priyanto, Jepri Agung Khaerunissa Anbar Istiadi Nabilla, Alnovara Yuan Natalia Pardede, Desta Ningsih Permatasari, Vera Prastya, Muhammad Eka Prastya, Muhammad Eka  Primahana, Gian Restiati, Nawang Rhesi Kristiana Rizna Triana Dewi Simbolon, Sumihartati