Proliferation and Tolerance Capability of Lactobacillus bulgaricus and Lactobacillus plantarum Regulated by the Resistant Starch from Arenga pinnata
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Abstract:
In this study, the starch from Arenga pinnata was used as the raw material to prepare Arenga pinnata resistant starch (APRS). In vitro fermentation was performed to investigate the effects of different concentrations of APRS (0.1%, 0.2%, 0.5%, 1%, 1.5%) on the proliferation and tolerance capability in the adverse gastrointestinal environment of Lactobacillus bulgaricus (LB) and Lactobacillus plantarum (LP) were studied. The results showed that when the APRS concentration gradually increased to 0.2%, the OD600 nm of LB reached the maximum (0.91); when the APRS concentration gradually increased to 0.5%, the OD600 nm of LP reached the maximum (0.94). However, with the continuous increase of APRS content, the concentration of probiotics solution decreased significantly. Therefore, APRS at a low concentration (0.1%~0.5%) could promote on the growth of LB and LP; but APRS at a high concentration (1%~1.5%) was not conducive to on the growth of LB and LP. Compared with glucose (GLU), APRS could enhance the tolerance capability of LB and LP to an acidic environment, high concentration of bile acid salts and gastric fluid environment (p<0.05). APRS promoted and inhibited the proliferation of probiotics at a low and high concentration, respectively, thereby enhancing their tolerance in the gastrointestinal environment. The potential prebiotic effect of APRS can provide a theoretical reference for further development of APRS.
