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All Journal HAYATI Journal of Biosciences MEDIA PETERNAKAN - Journal of Animal Science and Technology Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Jurnal Ilmu Pertanian Indonesia Jurnal Fitopatologi Indonesia Jurnal Akuakultur Indonesia Jurnal Pengolahan Hasil Perikanan Indonesia Jurnal Ilmu dan Teknologi Kelautan Tropis Jurnal Akuatika Microbiology Indonesia BIOTROPIA - The Southeast Asian Journal of Tropical Biology Biota: Jurnal Ilmiah Ilmu-Ilmu Hayati Biogenesis: Jurnal Ilmiah Biologi Jurnal AgroBiogen Current Biochemistry Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) Jurnal Sumberdaya Hayati Elkawnie Journal of Tropical Biodiversity and Biotechnology JURNAL BIOLOGI INDONESIA Jurnal Biodjati Omni-Akuatika Jurnal Penelitian Pendidikan IPA (JPPIPA) Jurnal Biologi Tropis ANNALES BOGORIENSES LIMNOTEK - Perairan Darat Tropis di Indonesia Biosaintifika: Journal of Biology & Biology Education Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Jurnal Riset Akuakultur Menara Perkebunan Jurnal Mangifera Edu Grouper: Jurnal Ilmiah Perikanan Konservasi Hayati Makara Journal of Science Jurnal Ilmu Kehutanan Jurnal Ilmu Kehutanan Annales Bogorienses

Iman Rusmana

Departmen Biologi, Fakultas Matematika Dan Ilmu Pengetahuan Alam, Institut Pertanian Bogor, Kampus IPB Darmaga, Bogor 16680, Indonesia

Author-ID : 286105

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Engineering Environmental Science Immunology & microbiology Library & Information Science Materials Science & Nanotechnology Medicine & Pharmacology Physics Veterinary

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Potensi Quorum Quencher Bakteri Filosfer dan Rizosfer terhadap Dickeya dadantii Taruna D. Satwika; Iman Rusmana; Alina Akhdiya
Jurnal AgroBiogen Vol 13, No 2 (2017): Desember
Publisher : Balai Besar Penelitian dan Pengembangan Bioteknologi dan Sumber Daya Genetik Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jbio.v13n2.2017.p101-110

Ekspresi gen-gen virulensi pada Dickeya dadantii diatur oleh proses quorum sensing menggunakan asil-homoserin lakton (AHL) sebagai molekul sinyal. Patogenisitas bakteri tersebut dapat dihambat oleh aktivitas quorum quenching (QQ) bakteribakteri penghasil AHL-laktonase. Tujuan penelitian ini adalah mengisolasi dan mengarakterisasi bakteri penghasil AHLlaktonase asal rizosfer dan filosfer yang berpotensi untuk dikembangkan sebagai quorum quencher untuk D. dadantii. Isolasi bakteri dilakukan dari sampel daun dan sampel tanah rizosfer beberapa komoditas tanaman asal Sukabumi, Tegal, Kupang, dan Wonosobo. Sebanyak 8 dari 79 isolat bakteri yang diperoleh menunjukkan aktivitas QQ terhadap bioindikator Chromobacterium violaceum. Bioasai respons hipersensitif (hypersensitive response) yang dilakukan pada tanaman tembakaumenunjukkan enam (KT2, KT9, KT10, KUT1, TKF2, and WKF3) dari delapan isolat tersebut tidak menimbulkan respons hipersensitif. Keenam isolat tersebut mampu menekan virulensi D. dadantii pada umbi kentang. Sekuen 16S rRNA enam isolat tersebut memiliki kemiripan tertinggi dengan Bacillus cereus, B. aryabhattai, B. acidiceler, dan Micrococcus aloeverae. B. cereus KT9 and B. aryabhattai TKF2 terdeteksi memiliki gen penyandi AHL-laktonase (aiiA). Ini merupakan laporan yang pertama tentang aktivitas QQ pada spesies M. aloeverae, B. aryabhattai, and B. acidiceler. Keberadaan gen aiiA pada B.aryabhattai juga belum pernah dilaporkan sebelumnya. Penelitian ini memberikan informasi baru tentang aktivitas QQ ketiga isolat tersebut dan potensinya sebagai quorum quencher untuk D. dadantii.

SENYAWA ANTIMIKROBA YANG DIHASILKAN OLEH BAKTERI ASAM LAKTAT ASAL BEKASAM Desniar -; Iman Rusmana; Antonius Suwanto; Nisa Rachmania Mubarik
Jurnal Akuatika Vol 3, No 2 (2012): Jurnal Akuatika
Publisher : Fakultas Perikanan dan Ilmu Kelautan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (232.214 KB)

Bakteri asam laktat (BAL) adalah mikroba dominan yang ditemukan dalam fermentasi ikan. Tujuan penelitian ini adalah menentukan perkiraan kuantitatif awal dari substansi antimikroba yang dihasilkan oleh isolat BAL asal bekasam dan mengetahui aktivitas antimikrobnya terhadap lima bakteri patogen. Perkiraan kuantitatif asam laktat dan H2O2, menggunakan metode titrasi. Uji aktivitas antimikroba menggunakan metode difusi sumur agar. Karakterisasi (morfologi, fisologi dan pertumbuhan) dan identifikasi menggunakan API 50 CHL (Bio-Mereux, France). Produksi asam laktat dan H2O2 meningkat dengan waktu inkubasi untuk semua isolat kecuali pada isolat BP(3). Produksi asam laktat tertinggi adalah 21,765 g/L yang dihasilkan oleh isolat SK(5) (48 jam inkubasi). Konsentrasi H2O2 yang dihasilkan oleh semua isolat jauh lebih rendah dibandingkan dengan asam laktat. Konsentrasi H2O2 tertinggi ialah 0,079 g/L pada isolat BI(3) dan BP(20) dalam 72 jam inkubasi. Supernatan bebas sel yang dinetralkan tidak menghambat pertumbuhan bakteri uji, sedangkan yang tidak dinetralkan dapat mengambat bakteri uji yang digunakan dengan zona hambat 9 -15 mm. Zona penghambatan terbesar dihasilkan oleh isolat SK(5) (24 jam inkubasi) terhadap S. aureus. Isolat BI(3), BP(3) dan BP(20) adalah Pediococcus pentosaceus 1 dengan kemiripan sebesar 99,9%. Isolat SK(5) adalah Lactobacillus plantarum 1 dengan kemiripan sebesar 99,9%. Penelitian ini menunjukkan bahwa isolat BAL asal bekasam dapat dijadikan sebagai kandidat biopreservatif pangan terutama untuk pengolahan hasil perikanan. Kata kunci: antimikrobial, asam laktat, bakteri asam laktat, bekasam, dan hidrogen peroksida.

Pemanfaatan Bakteri Sebagai Pereduksi Emisi Gas Metana Pada Limbah Cair Kelapa Sawit (Elaeis guineesis Jacq.) Nisa Widya Amanda; I Made Artika; Iman Rusmana
Current Biochemistry Vol. 4 No. 2 (2017)
Publisher : IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar

Kelapa sawit merupakan salah satu tumbuhan penghasil minyak terbesar di Indonesia. Proses pengolahan buah kelapa sawit menjadi minyak memiliki dampak negatif, yakni terciptanya gas metana. Gas metana merupakan salah satu gas penyumbang efek rumah kaca yang menyebabkan pemanasan global. Oleh karena itu, diperlukan cara untuk menurunkan emisi gas metana. Tujuan penelitian ini adalah penggunaan bakteri untuk menurunkan emisi gas metana pada limbah cair pemrosesan buah kelapa sawit. Bakteri diisolasi dari limbah cair kelapa sawit. Terhadap isolat tunggal yang diperoleh dilakukan uji aktivitas enzim soluble methane monooxygenase (sMMO) dan particulate methane monooxygenase (pMMO). Isolat dengan aktivitas methane monooxygenase tertinggi dipilih untuk analisis sekuen DNA dan konstruksi pohon filogenetika. Tahap isolasi bakteri menghasilkan 13 isolat koloni tunggal. Uji aktivitas methane monooxygenase menunjukkan bahwa semua isolat tidak memiliki aktivitas sMMO. Sebaliknya, semua isolat memiliki aktivitas pMMO dengan tingkat berbeda yaitu dengan rentang nilai antara 0.10 – 0.22 M/mL kultur/hari. Analisis sekuen DNA menunjukkan bahwa isolat terpilih adalah Klebsiella sp. Berdasarkan uji Gram diketahui bahwa bakteri ini termasuk bakteri Gram negatif. Bakteri berpotensi digunakan untuk menurunkan emisi gas metan pada limbah cair pemrosesan buah kelapa sawit. Kata kunci: Klebsiella sp, 16S rRNA, Metana, pMMO, sMMO.

Bacteria as Greenhouse Gases Reducing Agents from Paddy Plantation MAFRIKHUL MUTTAQIN; MIFTAHUDIN .; IMAN RUSMANA
Jurnal Sumberdaya Hayati Vol. 2 No. 2 (2016)
Publisher : Departemen Biologi, Institut Pertanian Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jsdh.2.2.45-51

High methane oxidation activity of local isolated methanotrophic bacteria have a potent as methane gases reducing agent while combined with nitrogen fixing bacteria as paddy biofertilizer. The aim of the research was to evaluate the effectiveness of the bacteria as methane gases reducing agent and biofertilizer in paddy plantation. The research was arranged in a completely randomized design consisted of fertilizer types and watering system treatments with four replicates. The research showed that paddy shoot length was not affected by the treatment. On the other hand, both plant freshand dry weight, as well as the number of productive tiller were affected by interaction of fertilizer types and watering system. Fertilizer types affected grain per panicle and methane flux after fertilization. In the end of paddy vegetative stage, bacterial fertilizers were capable to reduce methane emission in different rate. The different result in methane flux was likely due to the interaction between soil local microorganisms and soil chemical component.

Isolation and Screening of Soil Chitinolytic Actinobacteria as the Anti-Fungal Producer of Plant Pathogens Risky Hadi Wibowo; Sipriyadi Sipriyadi; Nisa Rachmania Mubarik; Iman Rusmana; Maggy Thenawidjaya Suhartono
Elkawnie: Journal of Islamic Science and Technology Vol 6, No 2 (2020)
Publisher : Universitas Islam Negeri Ar-Raniry Banda Aceh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/ekw.v6i2.7400

Abstract: Chitinolytic actinobacteria are currently more widely used because of their ability as the biological control agents to the pathogenic fungi, especially in horticultural and plantation crops. This research was conducted to obtain isolates of chitinolytic soil actinobacteria from the rhizosphere of the rubber plant (Hevea brasiliensis) area in IPB University. Antifungal activities from these actinobacteria hopely able to inhibit the growth of plant pathogenic fungi in Vitro on chitin agar media. Fusarium oxysporum and Sclerotium rolfsii are used in the inhibition test of chitinolytic actinobacteria. The results successfully obtained 16 isolates of actinobacteria were grew on Humic Acid Vitamin (HV) agar. It showed that six of 16 actinobacteria isolates were able to produce inhibition zones to the growth of hyphae of pathogenic fungi on potato dextrose agar (PDA). KK-15 and KK-07 isolates were able to produce the largest inhibition percentages in F. oxysporum and S. rolfsii. Based on the chitinolytic index (CI) values, KK-15 and KK-07 isolates produced CI values of 1.25 and 1.5, respectively. The morphological characteristics and Gram staining of both KK-15 and KK-07 isolates are closely relative with Streptomyces sp. Abstrak: Bakteri kitinolitik saat ini banyak diteliti karena kemampuannya sebagai agens pengendali hayati jamur patogen khususnya pada tanaman hortikultura dan perkebunan. Penelitian ini dilakukan untuk mendapatkan isolat-isolat bakteri kitinolitik asal tanah dari bagian perakaran tanaman karet (Hevea brasiliensis) di daerah perkebunan karet Institut Pertanian Bogor (IPB). Aktivitas antifungi dari bakteri ini diharapkan mampu menghambat pertumbuhan jamur patogen tanaman secara in Vitro pada media agar-agar kitin. Fusarium oxysporum dan Sclerotium rolfsii digunakan dalam uji hambat aktinobakteri kitinolitik. Hasil penelitian memperoleh 16 isolat aktinobakteri berhasil diisolasi dengan menggunakan media agar-agar Humic Acid Vitamin (HV), dan dari 16 isolat tersebut, enam isolat mampu menghasilkan zona hambat terhadap pertumbuhan hifa dari kedua jamur patogen pada media Potato Dextrose Agar (PDA) secara in Vitro. Isolat KK-15 dan KK-07 mampu menghasilkan diameter hambatan terbesar pada jamur F. oxysporum dan S. rolfsii. Berdasarkan nilai index kitinolitik (IK), isolat KK-15 dan KK-07 menghasilkan nilai IK sebesar 1,25 dan 1,5 secara berurutan. Karakteristik morfologi dan pewarnaan Gram dari kedua isolat yaitu KK-15 dan KK-07 memiliki kedekatan dengan kelompok Streptomyces spp.

Effects of Temperature on Denitrifying Growth and Nitrate Reduction End Products of Comamonas testosteroni Isolated from Estuarine Sediment IMAN RUSMANA
Microbiology Indonesia Vol. 1 No. 1 (2007): April 2007
Publisher : Indonesian Society for microbiology

Predictions of seasonal changes in N2O emission that occur in natural estuaries are important to anticipate the future implications of global warming. This study showed the effect of temperature on denitrifying growth and nitrate reduction end product of Comamonas testoteroni isolated from estuarine sediment using both batch and continuous cultures. The μmax values of Comamonas testosteroni grown in anaerobic batch culture were increased with increasing temperature, and the highest μmax was found at 26 oC. Concentrations of nitrate reduced (mg-1 dried weight cells) were higher at low temperature. Concentrations of N2 produced were higher at low temperature and the production of N2 was higher than both NO2- and N2O productions

Activity of Proteolytic and Amylolytic Enzymes from Bacillus spp. Isolated from Shrimp Ponds IT JAMILAH; ANJA MERYANDINI; IMAN RUSMANA; ANTONIUS SUWANTO; NISA RACHMANIA MUBARIK
Microbiology Indonesia Vol. 3 No. 2 (2009): August 2009
Publisher : Indonesian Society for microbiology

Accumulation of feed excess in commercial shrimp ponds due to overfeeding could decrease water quality. Protein and starch are the primary components of shrimp feed. This study was conducted to characterize extracellular proteases and amylases of Bacillus spp. isolated from shrimp ponds. 72 proteolytic and amylolytic Bacillus spp. isolates were screened from shrimp ponds in Karawang, West Java. Ten isolates were selected for further characterization for their growth and ability to reduce total suspended solid generated from commercial shrimp feed. Bacillus sp. DA 5.2.3 and L5 showed excellent activity in reducing total suspended solid, by 37 and 30% respectively. Protease and a-amylase activities of Bacillus sp. DA 5.2.3 isolate were consistently higher than that of L5. Maximum total and specific protease activity of DA 5.2.3 isolate was 2.0 U mL-1 and 40.9 U mg-1 respectively, while the activities of the L5 isolate were 2.1 U mL-1 and 23.0 U mg-1 respectively. Based on its 16S rRNA gene sequences, Bacillus sp. DA 5.2.3 showed 99% similarity to Bacillus cereus XHJ-2-6. Bacillus sp. DA 5.2.3 could potentially be applied to maintain water quality by reducing total suspended solid in water columns of shrimp ponds.

Physiological Characterization and Molecular Identification of Denitrifying Bacteria Possesing Nitrous Oxide High Reduction Activity Isolated from Rice Soils RATNA SETYANINGSIH; IMAN RUSMANA; PRIHASTO SETYANTO; ANTONIUS SUWANTO
Microbiology Indonesia Vol. 4 No. 2 (2010): August 2010
Publisher : Indonesian Society for microbiology

Rice fields are one of the main sources of high nitrous oxide N2O emission. Soil denitrifiers possessing high N2O reduction activity are important for controlling N2O emission. Nitrous oxide reduction is the last step of denitrification process. The aims of this study were to characterize and to identify denitrifying bacteria isolated from rice soils possessing high activity of N2O reduction. Soil samples were taken from 6 locations of rice fields in Bogor (West Java) and Tangerang (Banten), Indonesia. Physiological characterization was performed using API 20 NE, while molecular identification was conducted based on the 16S rRNA gene sequence. It was found that ten isolates of denitrifying bacteria were able to grow using N2O as an electron acceptor as indicated by decreasing N2O concentration in the headspace of the cultures. The bacterial growth indicated by optical density, increased up to 0.12-0.47 after 5 days incubation. Isolate BL2 had the highest activity of N2O reduction followed by BL1 and BLN1 at up to 5.41, 4.09, and 3.91 μmol mL-1 bacterial cultures, respectively. The BL1, BL2, and BLN1 isolates had some different physiological characteristics. Based on their 16S rRNA sequence, BL1 and BLN1 were closely related to Ochrobactrum anthropi ATCC 49188 with similarity of 99%.

Nitrous Oxide Reduction Activity of Denitrifying Ochrobactrum anthropi Isolated from Rice Field RATNA SETYANINGSIH; IMAN RUSMANA; PRIHASTO SETYANTO; ANTONIUS SUWANTO
Microbiology Indonesia Vol. 7 No. 2 (2013): June 2013
Publisher : Indonesian Society for microbiology

Nitrous oxide (N2O) is one of the principal greenhouse gases. Differences in soil microbial community composition affect N2O emission. Ochrobactrum anthropi BL1 and BLN1 isolated from rice field in Tangerang, Banten, Indonesia can grow on and reduce N2O. This study investigated the patterns of N2O reduction activity and growth of O. anthropi BL1 and BLN1 on denitrification media and also examined the ability of BLN1 strain to reduce N2O in flooded rice soil. Nitrous oxide reduction activity and growth of strains BL1 and BLN1 occurred simultaneously, indicating that the bacteria used N2O for growth. BL1 and BLN1 showed the same specific growth rate, but the N2O reduction rate of BLN1 was higher than that of BL1. Increase of the N2O concentration in the surface water of flooded soil without BLN1 isolate six hours after the addition of NO3- was significantly greater than the surface water from soil that had been inoculated with the isolate.

Sebaran spesies dan status kerapatan ekosistem mangrove di pesisir Kabupaten Muna Barat, Sulawesi Tenggara Rahman Rahman; Yusli Wardiatno; Fredinan Yulianda; Iman Rusmana
Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) Vol. 10 No. 3 (2020): Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (JPSL)
Publisher : Graduate School Bogor Agricultural University (SPs IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jpsl.10.3.461-478

Mangrove ecosystem is valuable coastal ecosystems for human because its economic, physical and ecological functions. One of the coastal areas which is the habitat of the mangove ecosystem is the coast of West Muna Regency. The coastal development in the coastal area had reduced the mangrove area and the density of mangrove ecosystem, which in turn affected the structure and density status of the ecosystem. The number of mangrove species in the coast of West Muna Regency was ten species consisting of Bruguiera cylindrica, Bruguiera gymnorrhiza, Rhizophora mucronata, Rhizophora apiculata, Rhizophora stylosa, Sonneratia alba, Xylocarpus granatum, Ceriops tagal, Scyphiphora hydrophyllacea, and Calophyllum inophyllum. The total density of mangrove was 752 trees/ha, however, by seeing in detail through each sampling station the density of Station I, II, III and IV was 879, 621, 687 and 820 trees/ha, respectively. Those densities are categorized as low density.

Co-Authors Abdjad Asih Nawangsih ACENG RUYANI Achmad Dinoto Aderiana Masthura AKHADIYA, ALINA Alfan Cahyadi Alfisah, Rizal Khoirun Aliati Iswantari Alina Akhdiya Alina Akhdiya ALINA AKHDIYA Amanda, Nisa Widya Angela Mariana Lusiastuti Angela Mariana Lusiastuti Ani Suryani Ani Suryani Ani Widiyati ANIK KUSMIATUN Anja Meryandini Anja Meryandini Antonius Suwanto Apon Zaenal Mustopa Ari Fina Bintarti Ari Fina Bintarti, Ari Fina Aris Tri Wahyudi Armanisa, Khafifah Baskoro S Wibowo Cahyadi, Alfan Cecep Kusmana CECILIA ANNA SEUMAHU CECILIA ANNA SEUMAHU Ciptadi Achmad YUSUP Daniel Djokosetiyanto Darmono Taniwiryono Desniar - - Dewi Puspaningsih DIAH ISKANDRIATI Dian Hendrayanti Dinamella Wahjuningrum Dondin Sajuthi DWI ANDREAS SANTOSA Dwi Ningsih Susilowati Eddy Supriyono Emei Widiyastuti Fachriyan Hasmi Pasaribu Fachriyan Hasmi Pasaribu Faturrahman Faturrahman Ferbiyanto, Andri Fredinan Yulianda Frijona Fabiola Lokollo GALUH WENING PERMATASARI Gunawan Djajakirana Hamim Hamim Happy Widiastuti Hefni Effendi Hessy Novita Hessy Novita I Komang Gede Wiryawan I MADE ARTIKA I Made Samudra Ifa Manzila Ika Roostika Tambunan, Ika Roostika Ika Setianingsih, Ika Indriyani, Yohanna Anisa Irwan Cahyadi It Jamilah KATHARINA JESSICA Khairul Syahputra Kukuh Nirmala Kuntari, Wahyu Budi Lena Novita Lingga, Rahmad Lizawati . Maggy Thenawidjaya Suhartono Maggy Thenawidjaya Suhartono Mahdani, Wilda Mahyarudin, Mahyarudin Manguntungi, Baso Masrukhin Masrukhin Masthura, Aderiana Miftahudin . Mukti Ali MUNTI YUHANA MUTTAQIN, MAFRIKHUL Nedwell, David B. Niken T.M Pratiwi, Niken T.M NISA RACHMANIA MUBARIK Nisa Widya Amanda Novita, Lena Nurfahmi, Riziq Ilham Nurhakiki Nurjanah PRIHASTO SETYANTO Prihasto Setyanto Priyo Handoyo Wicaksono Rahman Rahman Rahman Rahman Rahminovita Herlis RATNA SETYANINGSIH RATNA SETYANINGSIH RATNANINGTYAS, SUSI RIDWAN AFFANDI Rika Indri Astuti RIKA RAFFIUDIN Rina Hesti Utami Risky Hadi Wibowo Risky Hadi wibowo Roedhy Poerwanto Rosadela, Fitri Sipriyadi Sipriyadi Sipriyadi Siti Nur Jannah Sobir Sobir Solly Aryza Sri Budiarti Poerwanto Suhartono Suhartono SUSAN SOKA Syaiful Anwar T. Widiyanto Taruna D. Satwika TARUNI SRI PRAWAST MIEN KAOMINI ANY ARYANI DEDY DURYADI SOLIHIN Thenawidjaya, Maggy Tri Eko WAHYONO Tri Handayani Kurniati Tri Handayani Kurniati Tri Muji Ermayanti Tri P. Priyatno Tri Panji Tri Puji Priyatno Tri Widiyanto Tridesianti, Siska Tuasalamony, Mutia Musdalifah Utut Widyastuti Wahyuni, Reza Wibowo, Risky Hadi WIDANARNI WIDANARNI Widiyanto, Tri Wilda Mahdani Wildan Nurusallam Wiraswati, Sri Martina Yadi Suryadi Yani Aryati Yohana A Dahliani Yohanna Anisa Indriyani Yuli Siti Fatma Yuli Siti Fatma YULIN LESTARI Yuni Puji Hastuti Yusli Wardiatno Zaenal Arifin, Sukarya Zulfarina Zulfarina Zulfarina,

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