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Journal : Biology, Medicine,

Isolation, Morphological Characterization, Biochemistry, and Antagonistic Activity of Endophytic Bacteria from Rice Against Xanthomonas oryzae pv. Oryzae Sihotang, Saipul; Butar-Butar, Alfons Dwi Putra; Nasution, Lita; Rahma, Haliatur; Trizelia, Trizelia; Saragih, Magdalena; Kuswardani, Retna Astuti; Listiana, Ika; Napitupulu, Beatrix Sofranes
Biology, Medicine, & Natural Product Chemistry Vol 14, No 2 (2025)
Publisher : Sunan Kalijaga State Islamic University & Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14421/biomedich.2025.142.825-829

Abstract

Endophytic bacteria have the potential as environmentally friendly biocontrol agents in controlling bacterial leaf blight (BLB) in rice caused by Xanthomonas oryzae pv. oryzae (Xoo). This study aims to isolate, characterize morphology and biochemical tests, and test the antagonistic activity of endophytic bacteria from rice against Xoo. Isolation was carried out from healthy rice root tissue using a surface sterilization method. Morphological characterization included colony shape, color, edge, elevation, and Gram properties, while biochemical characterization included catalase, oxidase, motility, starch hydrolysis, and sugar fermentation tests. The antagonistic test used a dual culture assay method on NA (nutrient agar) media. The isolation results obtained six endophytic bacterial isolates (BETP 01–06) identified as the genus Pseudomonas and Bacillus with varying colony morphological characters. Antimicrobial activity test showed two potential isolates, BETP 03 (Pseudomonas) and BETP 05 (Bacillus), with an average inhibitory diameter of 16.3 mm and 16.5 mm against Xoo, respectively. Biochemical characterization showed that BETP 03 was bacillus, Gram-negative, citrate-negative, motile, gelatin hydrolysis positive, starch hydrolysis positive, and catalase positive; while BETP 05 was bacillus, Gram-positive, citrate-positive, motile, gelatin hydrolysis negative, starch hydrolysis positive, and catalase positive. These results indicate that both isolates have high potential as biological biocontrol agents in controlling bacterial leaf blight disease in rice.
Co-Authors Abdul Rahman Abidah Ayu Aisar Novita alqindi, muhammad iqbal Aminuyati Ariani Safitri, Sri Azwana Azwana Azwana Azwana B. Sengli J. Damanik Bidasari bidasari bidasari, Bidasari Budi Hartono Butar-Butar, Alfons Dwi Putra Chairani Hanum Chairani Hanum Dalimunthe, Arpan Darma Bakti Darma Bakti Dewi Siregar, Fitri Yanni E. Harso Kardhinata Effendi, Ihsan Ellen Lumisar Panggabean Emmy Harso Kardhinata Endang Sari Simanullang Erwin Hasibuan ERWIN NYAK AKOEB Erwin Nyak Akoeb, Erwin Nyak Erwin Pane, Erwin Eryanto, Okto Eva Sriana Ferdiansyah, Yudi Firmansyah, Dimas Ginting, Dian Dominika br Ginting, Jordanta Ginting, Natal Haliatur Rahma, Haliatur Hanny Hafiar Harahap, Abdul Anas Harahap, Darmadi Erwin Hasanuddin Hasanuddin Hasibuan, Syahbuddin Hernosa, Siswa Panjang HS Siregar, Tumpal Ida Ayu Putu Sri Widnyani Ida Sari Siregar Ika Listiana Indah Apriliya Irawan, Maya Novita Sari Lamria Sidauruk Lubis, Susilawati M. Akbar Siregar Maya Novita Sari Irawan Mitra Musika Lubis Muhammad Darwis Muhammad Deaprama Aydra Muhammad Reza Aulia Napitupulu, Beatrix Sofranes Nasution, Jamilah Nasution, Lita Natal Ginting Nina Salmaniah Siregar Noer, Zulhery Nurhidayana Nurhidayana Nurhidayana, Nurhidayana Pradana, Mahardika Gama Puspita, Diah Eka Rahmad Fauzi Rahmad Syah, Rahmad Rahmanta Rahmanta, Rahmanta Ramadhana, Muhammad Bobby Raudha Anggraini Tarigan Saipul Sihotang Saipul Sihotang, Saipul Salqaura, Siti Sabrina Saragih, Bahdan Saragih, Magdalena Sartini Sartini Sarumaha, Agustinus Seca Gandaseca Seri Sekar Sari Setya, Rezki Tri Silvia Nora, Silvia Sina sina Sina sina, Sina Siregar, Agus Saputra Siregar, Awaluddin M Siregar, M. Akbar Siregar, Nina Salmaniah Siti Mardiana Situmorang, Sudiwan Sri Milfayetty Surip Mawardi Suswati Syahbudin Hasibuan, Syahbudin Taufik Siregar Trizelia . Tumpal H.S. Siregar Vajri, Indri Yanil Wijoyo, Hadi Wiwik Handayani Yabani, Yabani Yanil Vajri, Indri Yusniar Lubis Zahari Zen Zul Fadhly