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All Journal HAYATI Journal of Biosciences Journal of Tropical Soils
Monconegoro, Dicky Adihayyu
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Agriculture, Biological Sciences & Forestry Earth & Planetary Sciences Environmental Science

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The Potential Use of Wood Vinegar as an Alternative Inhibitor to Enhance 5-Aminolevulinic Acid Production by Bacillus paramycoides Farah; Fauzi, Ahmad; Monconegoro, Dicky Adihayyu; Nurani, Diana; Abraham, Silva
HAYATI Journal of Biosciences Vol. 32 No. 4 (2025): July 2025
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.4308/hjb.32.4.850-858

Abstract

The expensive production of 5-aminolevulinic acid (ALA) as a plant growth stimulator led to an attempt to get an alternative substrate to reduce the production cost. Levulinic acid is the inhibitor of ALA dehydratase in ALA production. Wood vinegar, a liquid gas produced from wood combustion in airtight conditions, is known to contain 12-17 mM of levulinic acid. This study aims to explore the use of wood vinegar as a potential substitute for levulinic acid in the extracellular production of ALA by bacteria identified as Bacillus paramycoides through 16S rRNA sequence analysis. Adding precursor and inhibitor glutamate and 1% wood vinegar increased the ALA production to 174.3 µM, while the combination of glutamate and levulinic acid raised the ALA production to 179.9 µM. This study confirmed that wood vinegar can enhance the concentration of ALA and potentially substitute levulinic acid as an inhibitor in ALA production.
The Influence of Bat Guano on Peat Soil Properties in the Oil Palm Plantations Bafadhal, Farah; Fauzi, Ahmad; Nurani, Diana; Monconegoro, Dicky Adihayyu
JOURNAL OF TROPICAL SOILS Vol. 28 No. 3: September 2023
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2023.v28i3.117-125

Abstract

Highlighting the role of bat guano as an organic fertilizer housing beneficial microbes for soil and plants. The research aimed to assess the effect of bat guano on bacterial diversity and chemical and nutrient properties of peat soil in the vicinity of a bat cave within oil palm plantation in West Sulawesi, Indonesia. Four samples, namely bat guano (BG), peat soil (PS), peat soil mixed with bat guano (PSM), and peat soil inside the cave (PSI) were assessed. Organic carbon, pH, total nitrogen, the C/N ratio, Cation Exchange Capacity (CEC), Base Saturation (BS), macronutrients, and micronutrients were measured across all samples. Bacteria from the samples were also isolated, and their capability in hydrolyzing urea, solubilizing phosphate, solubilizing potassium, and producing the Indole Acetic Acid (IAA) hormone was characterized. The influence of bat guano was found on the enhancement production of IAA hormone, pH, organic carbon, total nitrogen, C/N ratio, CEC, BS, macronutrients, and micronutrients. The results also demonstrated substantial bacterial community resemblance between PSM and BG in contrast to the original PS (3:1). Meanwhile, peat soil inside the cave was indicated unique and has bacterial diversity, which can hydrolyze urea, solubilizing phosphate, and potassium.
Co-Authors ABRAHAM, SILVA Bafadhal, Farah DIANA NURANI farah Fauzi Ahmad Muda