1. Influence of Tween-80 on the production and structure of water-insoluble curdlan from Agrobacterium sp.
- Author
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Liang Y, Zhu L, Gao M, Zheng Z, Wu J, and Zhan X
- Subjects
- Adenosine Triphosphate agonists, Adenosine Triphosphate biosynthesis, Agrobacterium metabolism, Agrobacterium ultrastructure, Cell Membrane metabolism, Cell Membrane ultrastructure, Cell Membrane Permeability drug effects, Enzyme Activation drug effects, Fermentation, Glucosyltransferases metabolism, Kinetics, Oxygen metabolism, Polysaccharides, Bacterial biosynthesis, Polysaccharides, Bacterial isolation & purification, Uridine Triphosphate agonists, Uridine Triphosphate biosynthesis, Water chemistry, beta-Glucans isolation & purification, beta-Glucans metabolism, Agrobacterium drug effects, Cell Membrane drug effects, Polysaccharides, Bacterial chemistry, Polysorbates pharmacology, beta-Glucans chemistry
- Abstract
In order to explore the mechanism by which Tween-80 enhances the production of curdlan produced by Agrobacterium sp., the effects of Tween-80 on the production and structure of curdlan and Agrobacterium sp. were evaluated. Maximum curdlan production (51.94g/L) was achieved when 16g/L Tween-80 was added at the beginning of the cell growth stage. The addition of Tween-80 at higher concentration inhibited cell growth. However, the addition of 16g/L Tween-80 enhanced the production of curdlan with a looser ultrastructure, significantly weakened the envelopment of curdlan on Agrobacterium sp., altered the fine structure of cell membrane, and increased the cell membrane permeability. Moreover, the efficiency of oxygen and mass transport, respiration intensity, UTP regeneration, ATP regeneration, activity of curdlan synthetase, capacity of stress response and energy supply of Agrobacterium sp. were all greatly improved by the addition of Tween-80. These findings demonstrate the mechanisms by which Tween-80 enhances curdlan production and provide a cheap and feasible approach to weaken the envelopment of water-insoluble polysaccharides on bacteria., (Copyright © 2017. Published by Elsevier B.V.)
- Published
- 2018
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