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Journal : biotropika

Isolation and Identification of Non-Symbiotic Nitrogen-Fixing Bacteria in Prancak Village Tobacco Farming Soil Hefdiyah, Hefdiyah; Rofiqoh, Rofiqoh
Biotropika: Journal of Tropical Biology Vol. 13 No. 1 (2025)
Publisher : Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.biotropika.2025.013.01.04

Abstract

Prancak 95 is one of the most prominent tobacco (Nicotiana tabacum L.) varieties in Indonesia, originating from Prancak Village, Madura. Among the essential nutrients required for tobacco growth, nitrogen plays a crucial role in supporting vegetative and reproductive development. Although atmospheric nitrogen is abundant, constituting approximately 78% of the air, it is unavailable to plants in its diatomic form (N2). One sustainable approach to increasing nitrogen availability in soil is through the activity of non-symbiotic nitrogen-fixing bacteria (NFB), which convert atmospheric nitrogen into plant-accessible forms. This study aimed to isolate and identify non-symbiotic NFB from Prancak 95 tobacco farmland soils, in order to assess their population density, nitrogen-fixing potential, and taxonomic affiliation. Soil samples were collected from two locations in Prancak Village: West Tegal and Bilamabuk hamlets. Bacterial isolation was carried out using the pour plate method on Yeast Extract Mannitol Agar (YEMA) medium, followed by incubation at 37°C for 3 days. Pure bacterial isolates were subjected to macroscopic, microscopic, and biochemical characterisation based on Bergey's Manual of Determinative Bacteriology. Nitrogen-fixation potential was assessed by measuring the clear zone diameter on YEMA medium supplemented with Congo red, and the clear zone ratio was used as an indicator of nitrogenase activity. The results showed that the average non-symbiotic NFB population in West Tegal was 3.25 × 105 CFU.g-1, while in Bilamabuk it was 2.7 × 105 CFU.g-1. A total of six bacterial isolates were selected for further study. All isolates demonstrated nitrogen-fixing potential, with clear zone ratios ranging from 1.26 to 2.60 cm. Based on morphological, microscopic, and biochemical analyses, isolates coded PT2, PB1, and PB3 were identified as belonging to the genus Bacillus, while isolates PT1, PT3, and PB2 were tentatively identified as members of the genus Corynebacterium.
Co-Authors AA Sudharmawan, AA Abdul Kamaruddin Agussatriana Ahmad Habibi Syahid, Ahmad Habibi Ahmad Samawi Aisyah Aisyah Aisyah Kahar Putri, Aisyah Kahar Alfarisi, Hilmi Pratama Amalia Buntu Amanda, Esti Amanda, Nurul Hafifah Amelia Nurul Hakim Aminah Suriaman Anas, Mohammad Nizar Andi Nur Indah Sari Andi Patmasari Anggreani, Dwi Putri Toba Anggreni, Afrillia Anindita, Dominica Adeline Shiva Anisa Sekar Widhi Anisah Indah Sakinah Ansori, Muhammad Rizal Anwar, Rina Anwar, Seniwaty Ashari, Abdul Azizah Rachmawati Azizah, Ririn Nurul Bella, Shinta Budi Budi Buna, Pertiwi Sari Cindy, Margaret Damayanti, Mita Eka Damayanti, Selvi Defniwita Yuska Desrin Lebagi Devi, Govinda Kurnia Dewi, Anjar Kusuma Dewi, Novi Rosita dg. masikki, maharani farah dhifa Dharmawan, Rio L. Dinayah, Syafinatud Dini Amalia, Dini Djupi, Nurdiyanto Dwi Lestari, Putri Dwi Putri, Dwi Eko Noerhayati Eli Suryani Ernita Erniwati Erniwati Erza Lorenza Fali, Muhammad Faqih Faqih Febiani, Anita Firdayani, Firdayani Fitria, Ayu Fitriani Fitriani Gani, Kameriah Halimah, Azka Handayani, Sekar Hanifah, Lulu Romadhoni Harni, Harni Hasanah, Adinda Shofiatul Hasriany Arifin Hastini, Hastini Hefdiyah Hefdiyah Herlin Susanti Hidayati, Nazlah I Made Budiarsa I Nengah Kundera Ida Nursida Idris Idris Imanuddin Imanuddin, Imanuddin Iriansyah Iriansyah, Iriansyah Ismanti, Septie Putri Kamaruddin, Abd. Kanserini, Julia Kappa, Eyleen Kartika, Niluh Yuni Konder Manurung Kurniawati, Kuni Kusumawardani, Emi Kusumawati, Evi La Banudi, La Banudi M. Ramli M. Rodiaminullah Maemonah, Maemonah Maf'ulah, Maf'ulah Maf'ulah, Maf’ulah Mahdy, Yanuar Roihan Maheswari, Anindya Dinarya Mainingsih, Sayu Majid, Alisha Vinia Alethea Martini Martini Maryam Qodarin Mashuri Mashuri Mbani , Nurmakfira Mentari, Cindhy Qirana Cinta Moh Zahid Rosi Asyari Mu'awanah, Mu'awanah Muhammad Muttaqin Mukrim, Mukrim Musyarrafah Musyarrafah Mutmainah Wahyuningrum Mu’affan, Achmad Adha Nadimin Nadimin Nadrun, Nadrun Nasir, Nurul Azizah M Neliyanti Netty Ino Ischak Ningsih Laelatul Hidayah Nirwana, Nirwana Noorma, Nilam Notesya Astri Amanupunnyo Novika, Revi Gama Hatta Nur Anisa Nur Hidayah Nur Sehang Thamrin Nurhawa, Nurhawa Nuriastiti, Oktaviana Nurli, Muhammad Oktarina, Mutiara Oli’i, Apriliani Pratiwi, Adelina Putra, Lutfi Lafil Cahya Rahmi Junaida Rahmi, Junida Ramadhan, Muhammad Ridho Renaldi, Laode Moh Ririn Nurul Azizah Rofika Rofika, Rofika Rosita Sofyaningrum Rudi Munawwir Ashalahi Rustandi, Jajang Rutinah, Rutinah Sambonu, Febiola Santi Aprilian Lestaluhu Santoso, M. Ferry Teguh Saputri, Ona Sari, Nupita Sendra, Eny Shinta Mayasari Siswanto, Dedi Siti Khoiriyah Siti Nur Qomariah Situmeang, Lamria Solekah, Siti Maratus Sony Firmansyah Sri Astutik Sriati Usman Supeno Supeno Syahri Syahri Syahrul Munir Toruntju, Sultan Akbar Tri Sutrisno Tutik Setyowati, Tutik Ulum, Miftahol Umaira, Siti Uswatun Hasanah Utami Utami Van Gobel, Sri Yunanci Wahyudin Wahyudin Wakano, Abuzar Wardani, Ali Ridho Wardatul Jannah Windarsih, Yulia Yulita, Hendra Zainab Zarkiani Hasyim Zulvin, Moh.