Effects of dietary supplementation with Jerusalem artichoke (&lt;i&gt;Helianthus tuberosus&lt;/i&gt; L.) tubers on growth performance, nutrient digestibility as well as activity and composition of large intestinal microbiota in rats

L Samal,A.K Pattanaik,V.B Chaturvedi

doi:10.22358/jafs/68779/2017

Effects of dietary supplementation with Jerusalem artichoke (<i>Helianthus tuberosus</i> L.) tubers on growth performance, nutrient digestibility as well as activity and composition of large intestinal microbiota in rats

L Samal, A.K Pattanaik + Show 1 more

Open Access

https://doi.org/10.22358/jafs/68779/2017

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Abstract

Highlights

Prebiotics are dietary components resistant to digestion in the small intestine which are selectively fermented by the microbiota, mainly in the large intestine
These carbohydrates are β-(2→1) linear fructans with a terminal glucose unit linked by an α-(1→2) bond. They are neither hydrolysed by the low pH of gastric fluid nor by the host endogenous digestive enzymes in the small intestine (Flickinger et al, 2003). They reach the hindgut in the intact form and are available for fermentation by bacteria yielding a variety of products, such as short-chain fatty acids (SCFA) and gases (CO2, CH4, H2, etc.)
Supplementation of rat diets with JA tuber powder had no effect on growth performance (Table 2)

Summary

Introduction

Prebiotics are dietary components resistant to digestion in the small intestine which are selectively fermented by the microbiota, mainly in the large intestine They are expected to provide health promoting properties (Roberfroid et al, 2010) being a substrate for potentially beneficial endogenous gut microbiota (e.g., Bifidobacterium spp. and Lactobacillus spp.) residing in the hindgut, but not to the potentially pathogenic bacteria such as toxin producing Clostridium spp., proteolytic Bacteroides and toxigenic Escherichia coli (Samal and Behura, 2015). These carbohydrates are β-(2→1) linear fructans with a terminal glucose unit linked by an α-(1→2) bond They are neither hydrolysed by the low pH of gastric fluid nor by the host endogenous digestive enzymes in the small intestine (Flickinger et al, 2003). The undissociated SCFA, as anti-bacterial agent, can act against pH-sensitive pathogenic bacteria (den Besten et al, 2013)

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