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All Journal BIOTROPIA - The Southeast Asian Journal of Tropical Biology AGRIKA Cropsaver : Journal of Plant Protection Agrovigor: Jurnal Agroekoteknologi Plumula : Berkala Ilmiah Agroteknologi Jurnal Agroekoteknologi International Journal of Applied Biology BIOEDUSCIENCE JPT : JURNAL PROTEKSI TANAMAN (JOURNAL OF PLANT PROTECTION) Jurnal Pembelajaran dan Biologi Nukleus Jurnal Agrotropika Nusantara Science and Technology Proceedings Jurnal Bioteknologi & Biosains Indonesia (JBBI) Jurnal Bioteknologi & Biosains Indonesia
Prasetyawati, Endang Triwahyu
Agrotechnology, Agriculture Faculty, Universitas Pembangunan Nasional “Veteran” Jawa Timur, Surabaya 60294, Indonesia
Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Economics, Econometrics & Finance Education Energy Engineering Environmental Science Health Professions Immunology & microbiology Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Medicine & Pharmacology Veterinary

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ALGINATE-SEED ENCAPSULATION CONTAINING ENDOPHYTIC Bacillus cereus BTH21 FOR BIOCONTROLLING WILT DISEASE IN EGGPLANT Arika Purnawati; Endang Triwahyu Prasetyawati; Haidar Fari Aditya; Saefur Rohman
BIOTROPIA Vol. 32 No. 3 (2025): BIOTROPIA Vol. 32 No. 3 December 2025
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11598/btb.2025.32.3.2410

Abstract

HIGHLIGHTSSeed encapsulation using alginate and B. cereus BTH21 for biocontrol of wilt disease in eggplant.ABSTRACTBacterial wilt is a major plant disease caused by Ralstonia solanacearum that infects important crops, such as eggplant, causing wilt, stunted growth, and reduced yield. The biocontrol of the pathogen can be done by employing antagonistic bacteria, yet direct inoculation into the soils are often ineffective due to low population of the pathogen in the soils, which also easily washed away by watering activity. Seed encapsulation technique, using alginate, zeolite and peat, containing antagonistic bacteria Bacillus cereus BTH21 to control R. solanacearum is the novelty proposed in this research. Hence, this research aimed to develop alginate seed-encapsulation technique containing Bacillus cells as a mean to biologically control R. solanacearum in eggplant. Endophytic Bacillus cereus BTH21 strains was isolated from healthy eggplant tissue obtained from Kediri, East Java Province, Indonesia. Subsequent isolation, purification and molecular identification confirmed the identity of the strain. Three seed-encapsulation formulations were made: a) control (no encapsulation); b) alginate + zeolite + Bacillus (Al+Z+B); and c) alginate + peat + Bacillus (Al+P+B). A field experiment was designed in a Completely Randomized Design (CRD) where the alginate-encapsulated eggplant seeds were sown along with deliberate R. solanacearum inoculation (107 cfu/mL) into the soils. Observations were carried out every 7 days from 0 – 49 days after sowing (DAS) on several parameters, i.e., incubation period, infection rate, germination percentage, plant height, and number of leaves. The data were analyzed by using analysis of variance (ANOVA) followed by Duncan’s multiple range test at a significance level of P < 0.05. The results showed that both seed encapsulation formulations prolonged incubation period (15 and 13 DAS) compared to the control (10 DAS), reduced infection rate, increased germination rate, as well as higher agronomic performances (plant height, number of leaves) compared to the control at 7 – 49 DAS. Overall, this results indicated the potential of alginate seed-encapsulation techniques containing biocontrol agents to control plant diseases.
Isolation and Characterization of Endophytic Bacteria from The Roots of Avicennia sp. in The Mangrove Area of Gunung Anyar, Surabaya Fatimah Azzahra; Endang Triwahyu Prasetyawati; Safira Rizka Lestari
JURNAL PEMBELAJARAN DAN BIOLOGI NUKLEUS Vol 11, No 1: Jurnal Pembelajaran Dan Biologi Nukleus March 2025
Publisher : Universitas Labuhanbatu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36987/jpbn.v11i1.6596

Abstract

Mangroves are unique ecosystems that support biodiversity, including endophytic microorganisms. Endophytic bacteria group is a group of microbes that have a mutualistic symbiosis to the host plant without harming the host, and can act as biocontrol agents and plant stimulants. Endophytic bacteria have a very wide host range. Each plant has an abundance and diversity of endophytic bacteria, depending on the internal and external factors that affect it. This study aims to determine the characteristics of endophytic bacteria and identify the diversity of endophytic bacteria found in Avicennia sp. Method Sampling from mangrove area of Gunung Anyar, Surabaya. Characterization of endophytic bacteria was done by Gram test, spore staining test, catalase test, oxidative-fermentative test, and selective media test (King's B and Yeast Dextrose Carbonate). The results showed the existence of several isolates of endophytic bacteria that have morphological diversity and different characteristics, such as shape, color, colony edge, and colony surface. Conclusions In this study has been successfully isolated some endophytic bacteria such as Lactobacillus sp., Corynebacterium sp., Bacillus sp., Xanthomonas sp., and there are also endophytic bacterial isolates that have not been identified. This study contributes to an early understanding of the diversity of microorganisms in mangrove ecosystems and opens up opportunities for further exploration of their potential applications, one of which is in agriculture
Co-Authors Abifah, Serlia Nur Al Rahmad, Nirmala Putri Amalia, Anisa Rizki Arika Purnawati Dita Megasari Dwirizki Permata, Aprilla Hendiana Fatimah Azzahra Febiola, Regina Rosari Haidar Fari Aditya Heriyati, Sukma Herry Nirwanto Khairunnisa, Nabila Zahra Maulina Aizah, Shinta Nensi Agustina Octavianti, Dewi Fortuna Penta SURYAMINARSIH Perwira Moekti, Nirwana Septania Galih Rani, Sasiska Sa'adah, Fatimah Lailatus Saefur Rohman Safira Rizka Lestari Sagala, Yosua Nathanael Itona Sasiska Rani Sri Wiyatiningsih Tri MUJOKO Wafiah Huwaina Zata Dini Yanti, Vika Yenny Wuryandari Yenny WURYANDARI Yosua Nathanael Itona Sagala