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All Journal JURNAL GALUNG TROPIKA Jurnal Biologi Tropis
Yovi Avianto
Institut Pertanian STIPER
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Immunology & microbiology

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Optimalisasi Pertumbuhan dan Kualitas Buah Pepaya California (Carica pepaya L.) melalui Kombinasi Vermikompos dan Bakteri Fotosintesis Yovi Avianto; Alan Handru
Jurnal Galung Tropika Vol 15 No 1 (2026)
Publisher : Fakultas Pertanian, Peternakan dan Perikanan Universitas Muhammadiyah Parepare

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31850/jgt.v15i1.1355

Abstract

California pepaya is a highly popular fruit among Indonesian consumers. However, its productivity is often hindered by declining soil fertility caused by excessive use of chemical fertilizers. Substituting chemical fertilizers with vermicompost and photosynthetic bacteria has been reported to effectively improve soil fertility and enhance plant resilience. This study aims to optimize the growth and fruit quality of California pepaya through the combination of vermicompost and photosynthetic bacteria. The research was conducted from August 2023 to November 2024 at the Education and Research Farm (KP2) of the STIPER Agricultural Institute, Yogyakarta. The treatments tested in this study included vermicompost and the photosynthetic bacterium Rhodopseudomonas palustris, applied to planting holes, along with a control. Data on soil physical and chemical properties, as well as pepaya growth and production, were analyzed using an independent t-test, and their relationships were evaluated through correlation analysis. The results showed that the application of vermicompost and photosynthetic bacteria significantly improved soil physical properties of water-holding capacity. Vermicompost and photosynthetic bacteria also enhanced soil organik matter, C-organik, cation exchange capacity (CEC), and the availability of nutrients (N and K) while reducing chloride (Cl) levels. The combination of vermicompost and photosynthetic bacteria improved physiological parameters of pepaya plants, such as relative water content, and increased plant height, number of flower, and fruit brix levels, although fruit weight and length decreased.
Physiological Response of Mentik Wangi Rice (Oryza sativa L.) to Zinc oxide Nanoparticles Under Drought Stress Abdul Zaki; Yovi Avianto; Henra Henra; Rina Puji Lestari
Jurnal Biologi Tropis Vol. 26 No. 3 (2026): in Progress
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v26i3.11910

Abstract

Mentik wangi rice (Oryza sativa L.) is a local aromatic Indonesian variety known for its superior grain quality but susceptible to drought Stress. 2Zinc Oxide Nanoparticles (ZnO-NPs) have been widely investigated as nano-fertilizers to improve plant physiological performance under abiotic stress; however, information regarding their effects on the local aromatic rice cultivar Mentik Wangi remains limited. This study aimed to evaluate the physiological responses of Mentik Wangi rice to ZnO-NPs application under drought stress and to identify the most effective ZnO-NPs concentration for each physiological parameter. The experiment was arranged in a factorial Completely Randomized Design with two water regimes (50% and 100% field capacity) and six ZnO-NPs concentrations (0, 0.75, 1.50, 2.25, 3.00, and 3.75 ppm). Data were analyzed using two-way analysis of variance followed by Duncan's Multiple Range Test at the 5% significance level. Under drought stress, ZnO-NPs at 2.25 ppm produced the highest photosynthetic rate (0.79 µmol CO₂ m⁻² s⁻¹) and improved membrane stability index, whereas 1.50 ppm resulted in the lowest transpiration rate (0.016 mmol H₂O m⁻² s⁻¹) and the highest proline accumulation. Chlorophyll content also increased under normal conditions following the application of 2.25 ppm ZnO-NPs. In contrast, ZnO-NPs did not significantly affect ascorbic acid content or relative water content. These findings indicate that the physiological response of Mentik Wangi rice to ZnO-NPs depends on the parameter evaluated, with 2.25 ppm and 1.50 ppm producing the most favorable responses for different physiological traits under the conditions of this study.
Co-Authors Abdul Zaki Alan Handru Henra Henra Rina Puji Lestari