Iman Rusmana
Department of Biology, Faculty of Mathematics and Natural Sciences, Bogor Agricultural University. Jl. Raya Darmaga, Bogor 16680, West Java. Indonesia

Published : 46 Documents
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Journal : Jurnal Sumberdaya Hayati

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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (381.507 KB) | DOI: 10.29244/jsdh.2.2.%p

Abstract

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. 
Karakterisasi Enzim Pendegradasi AHL dari Bacillus cereus INT1c dan Bacillus sp. NTT3a RATNANINGTYAS, SUSI; RUSMANA, IMAN; AKHDIYA, ALINA
Jurnal Sumberdaya Hayati Vol 3, No 1 (2017)
Publisher : Institut Pertanian Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (493.751 KB) | DOI: 10.29244/jsdh.3.1.%p

Abstract

Some of Gram-negative bacteria perform a phenomenon called quorum sensing (QS) to activate certain phenotypes such as pathogenicity. The bacterial cells performing QS produce N-acyl homoserine lactone (AHL) as signal molecules to communicate within a population. These molecules can be degraded by the enzyme, i.e. AHL lactonase. This study aimed to characterize the activity of AHL lactonase from Bacillus cereus INT1c and Bacillus sp. NTT3a in different pH and temperature levels. Both strains produce AHL-lactonase that could be found in intracellular and extracellular extracts. The dialysis process of extracellular AHL-lactonase of INT1c significantly increased the specific activity from 5.91 to 29.96, different from an extracellular enzyme of NTT3a that slightly increased from 4.08 to 5.39. Generally dialyzedAHL-lactonase of both B. cereus INT1c and Bacillus sp. NTT3a had activity in wide pH range with better activity in acidic pH and were not stable in high temperature with the highest activity at 30-40 oC. 
Co-Authors , Lizawati , Sobir -, Rahman . Mahyarudin, . Achmad Dinoto Aliati Iswantari ALINA AKHADIYA ALINA AKHDIYA Amanda, Nisa Widya Ani Suryani ANIK KUSMIATUN ANIK KUSMIATUN ANJA MERYANDINI Antonius - Suwanto ANTONIUS SUWANTO ANTONIUS SUWANTO Ari Fina Bintarti, Ari Fina ARIS TRI WAHYUDI Baskoro S Wibowo, Baskoro S Cahyadi Irwan, Cahyadi Cahyadi, Alfan CECEP KUSMANA CECILIA ANNA SEUMAHU Daniel Djokosetiyanto DEDY DURYADI SOLIHIN Desniar - - Desniar -, Desniar Desniar . DIAH ISKANDRIATI DIAH ISKANDRIATI DONDIN SAJUTHI DONDIN SAJUTHI DWI NINGSIH SUSILOWATI Eddy Supriyono Fachriyan Hasmi Pasaribu Ferbiyanto, Andri Fredinan Yulianda HAPPY WIDIASTUTI Hefni Effendi I MADE ARTIKA I Made Samudra It Jamilah KATHARINA JESSICA KATHARINA JESSICA Khairul Syahputra, Khairul Komang Gede Wiryawan Kukuh Nirmala Kuntari, Wahyu Budi Lena Novita MIFTAHUDIN ., MIFTAHUDIN Munti Yuhana MUTTAQIN, MAFRIKHUL Niken T.M Pratiwi, Niken T.M NISA RACHMANIA MUBARIK Novita, Hessy PANJI, TRI - PRIHASTO SETYANTO Puspaningsih, Dewi Rahman Rahman RATNA SETYANINGSIH RATNANINGTYAS, SUSI Ridwan Affandi RIKA RAFFIUDIN Rina Hesti Utami ROEDHY POERWANTO Siti Nur Jannah SRI BUDIARTI SRI BUDIARTI SUSAN SOKA SUSAN SOKA T. Widiyanto Thenawidjaya, Maggy TRI EKO WAHYONO, TRI EKO Tri Handayani Kurniati Tri Muji Ermayanti Tri Puji Priyatno Tri Widiyanto UTUT WIDYASTUTI Wibowo, Risky Hadi Widiyati, Ani Yadi Suryadi Yohana A Dahliani, Yohana A YULIN LESTARI Yuni Puji Hastuti Yuni Puji Hastuti Yusli Wardiatno Yusup, Ciptadi Achmad