Bioproduction of exopolysaccharides by lactic acid bacteria using agave by-products

• Published in: Process biochemistry (1991) Vol. 146; pp. 234 - 240
• Main Authors: Vázquez-Vargas, C.C., Cordero-Soto, I.N., Flores-Maciel, H.A., Lara-Ceniceros, T.E., Gallegos-Infante, A., González-Herrera, S.M., Ochoa-Martínez, L.A., Rutiaga-Quiñones, O.M.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.11.2024
• Subjects: Agave leaves; Bagasse; Lactic acid bacteria; Polymer; Polymer; Lactic acid bacteria; Bagasse; Agave leaves
• ISSN: 1359-5113
• DOI: 10.1016/j.procbio.2024.07.028

The capacity to produce exopolysaccharides (EPS) is well known among several microorganisms, especially lactic acid bacteria (LAB). However, the physiological role of these polymers has yet to be elucidated. Nevertheless, it has been observed that LAB growth conditions and adaptation to external environments and substrates are directly related to EPS biosynthesis. This study aimed to evaluate alternative carbon sources from agave by-products to synthesize EPS with LAB. Native LAB from the genera Lactococcus and Lactiplantibacillus were evaluated for their ability to produce EPS from simple carbon sources; they showed potential to produce EPS, presenting positive results on Congo red plates using glucose and fructose as carbon sources. In addition, native LAB could synthesize EPS from agave leaves and bagasse. L. plantarum ITD-ZC-107 stand out in the production of EPS, especially from bagasse. Thermostability of EPS from the evaluated carbon sources was analyzed. EPS from agave leaves and bagasse showed a higher degradation temperature than the ones obtained from glucose and sucrose, indicating better thermo-resistance. [Display omitted] •Native lactic acid bacteria produced exopolysaccharides from glucose and sucrose.•Exopolysaccharides were produced by lactic acid bacteria using agave by-products.•EPS from agave by-products showed high degradation temperatures.