Adhesion of Lactobacillus amylovorus to Insoluble and Derivatized Cornstarch Granules
AUTOR(ES)
Imam, Syed H.
RESUMO
Approximately 70% of the cells in a suspension of the amylolytic bacterium Lactobacillus amylovorus bind to cornstarch granules within 30 min at 25°C. More than 60% of the bound bacteria were removed by formaldehyde (2%) or glycine (1 M) at pH 2.0. More than 90% of the bound bacteria were removed by MgCl2 (2 M; pH 7.0). Binding of L. amylovorus to cornstarch was inhibited in heat-killed cells and in cells that had been pretreated with glutaraldehyde, formaldehyde, sodium azide, trypsin, or 1% soluble potato starch. Bacterial binding to cornstarch appeared to correlate with both the concentration of cornstarch in the suspension and the amylose content in the granules. The ability of L. amylovorus to adhere to cornstarch granules was reduced for granules that had been extracted with HCl-ethanol, HCl-methanol, HCl-propanol, or HCl-butanol. Chemical derivatization of cornstarch resulted in a wide variety of adhesion responses by these bacteria. For example, 2-O-butyl starch (degree of substitution, 0.09) enhanced adhesion, whereas two palmitate starches (degree of substitution, 0.48 and 0.09) exhibited reduced adhesion activities. 2-O-(2-hydroxybutyl) starch and starch-poly(ethylene-co-acrylic acid) ester showed adhesion activities similar to those of the nonderivatized starch controls.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=182856Documentos Relacionados
- Development of an amylolytic Lactobacillus plantarum silage strain expressing the Lactobacillus amylovorus alpha-amylase gene.
- Adhesion of Cultured Fibroblasts to Insoluble Analogues of Cell-Surface Carbohydrates
- Specific Response of a Novel and Abundant Lactobacillus amylovorus-Like Phylotype to Dietary Prebiotics in the Guts of Weaning Piglets
- Bacteriocin Production with Lactobacillus amylovorus DCE 471 Is Improved and Stabilized by Fed-Batch Fermentation
- Enzyme system in rat leucocyte granules which degrades insoluble collagen.