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International Journal of Zoology and Applied Biosciences Research Article
Modulation of culture conditions on lipase production by Lysinibacillus fusiformis PM4 isolated from the gut of Penaeus monodon
G. Dhanush, V. Sanjaikumar, T. Ramesh and M. Thangaraj
Year : 2026 | Volume: 11 | Issue: 1 | Pages: 293-302
Received on: 14/11/2025
Revised on: 27/12/2025
Accepted on: 17/01/2026
Published on: 31/01/2026
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G. Dhanush, V. Sanjaikumar, T. Ramesh and M. Thangaraj( 2026).
Modulation of culture conditions on lipase production by Lysinibacillus fusiformis PM4 isolated from the gut of Penaeus monodon
. International Journal of Zoology and Applied Biosciences, 11( 1), 293-302.
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Abstract
Microbial symbionts inhabiting the gastrointestinal tract of Penaeus monodon constitute a crucial reservoir of functional traits that influence host nutrition, immunity, and disease resistance. This study evaluated the effects of key environmental parameters including temperature, pH, and salinity on extracellular lipase production by a potent gut-associated bacterial isolate, Lysinibacillus fusiformis PM4. The isolate was cultured under varying physicochemical conditions, and lipase activity was quantified across incubation periods. Results revealed that L. fusiformis PM4 is a halotolerant, mesophilic, and alkaliphilic strain exhibiting peak lipase activity under defined stress conditions. Time-course assessments further indicated a consistent and progressive increase in enzyme production, highlighting its stable and sustained catalytic potential. The adaptive resilience, enzymatic competence, and antagonistic properties of L. fusiformis PM4 underscore its promise as a probiotic candidate for improving nutrient assimilation, pathogen suppression, and overall productivity in shrimp aquaculture systems.
Keywords
Aquaculture, Gut microbes, Lipase, Lysinibacillus, Optimization, Penaeus monodon.
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© The Author(s) 2025. This article is published by International Journal of Zoology and Applied Biosciences under the terms of the Creative Commons Attribution 4.0 International License (creativecommons.org), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
