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All Journal JURNAL ILMU PERTANIAN Agrotekma: Jurnal Agroteknologi dan Ilmu Pertanian Agritrop : Jurnal Ilmu-Ilmu Pertanian (Journal of Agricultural Science) Jurnal Agrotek Lestari Jurnal Pembelajaran dan Biologi Nukleus Bakti Cendana: Jurnal Pengabdian Masyarakat Jurnal Eksplorasi Akuntansi (JEA) Room of Civil Society Development J+Plus: Jurnal Mahasiswa Pendidikan Luar Sekolah Room of Civil Social Development
Maulidia, Vina
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Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemistry Computer Science & IT Economics, Econometrics & Finance Education Environmental Science Immunology & microbiology Languange, Linguistic, Communication & Media Nursing Social Sciences Other

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Exploration of Endophytic Bacteria from Rice Roots as a Biocontrol Agency for Leaf Blight Disease in Vitro Maulidia, Vina; Agustinur, Agustinur; Siregar, Mawaddah Putri Arisma; Weihan, Rayhan Amadius
JURNAL PEMBELAJARAN DAN BIOLOGI NUKLEUS Vol 11, No 4: Jurnal Pembelajaran Dan Biologi Nukleus December 2025
Publisher : Universitas Labuhanbatu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36987/jpbn.v11i4.8113

Abstract

Background: Endophytic bacteria live within plant tissues without causing disease symptoms and possess strong potential as biocontrol agents through the production of antimicrobial compounds such as bacillomycin, iturin, siderophores, hydrogen cyanide, chitinase, glucanase, protease, and volatile compounds like acetoin, 2,3-butanediol, and H₂S. These metabolites can inhibit leaf blight pathogens, including Xanthomonas oryzae. The prolonged use of chemical pesticides has caused pathogen resistance, environmental harm, and health risks, highlighting the need for eco-friendly biopesticides. Endophytic bacteria provide a sustainable alternative by suppressing pathogens through competition, biofilm formation, and inducing plant resistance. This study aims to explore the potential of endophytic bacteria isolated from rice roots as biocontrol agents against leaf blight pathogens in vitro. Methodology: Endophytic bacteria were isolated from healthy 40 days rice plants in Pajar Village, Darul Hikmah District, Aceh Jaya Regency Aceh Province. Isolation and purification were carried out using the streak plate technique, followed by macroscopic and microscopic characterization. Antagonistic ability was evaluated through the well diffusion method, and the effects of selected isolates on seed vigor and viability were assessed. Findings: A total of 25 isolates were successfully obtained, exhibiting macroscopic and microscopic diversity. Seven isolates inhibited pathogen growth by forming clear zones, with isolate AJY07 showing moderate inhibition (10 mm). These seven isolates (AJY04, AJY06, AJY07, AJY09, AJY11, AJY23, and AJY24) also enhanced seed vigor and viability and reduced infection during germination by 10–20% compared to controls. Contributions: The findings demonstrate the potential of selected endophytic bacteria as environmentally friendly biopesticides to support the development for sustainable rice cultivation
Co-Authors Agustinur, Agustinur Aini, Zahriatul Atmaja, Nanda Chairudin Chairudin Dewi Fithria Diman, Banta Harahap, Arya Gading Heryanto Susilo Ida Ayu Putu Sri Widnyani Irvan Subandar Jalil, Muhammad Jasmi Jasmi Jekki Irawan Lizmah, Sumeinika Fitria Muhammad Afrillah Pebriyani, Dewi Pelangi, Putri Pramulya, Rahmat Putra, Iwandikasyah Rayhan Amadius Weihan Sari, Putri Mustika Siregar, Mawaddah Putri Arisma Wijaksena, Ego Ibnu Yuliana Yuliana