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Enhancement of polysaccharide production in suspension cultures of protocorm-like bodies from Dendrobium huoshanense by optimization of medium compositions and feeding of sucrose

Paper ID Volume ID Publish Year Pages File Format Full-Text
36130 45122 2007 8 PDF Available
Title
Enhancement of polysaccharide production in suspension cultures of protocorm-like bodies from Dendrobium huoshanense by optimization of medium compositions and feeding of sucrose
Abstract

A strategy that optimization of medium compositions for maximum biomass followed by feeding of sucrose for maximum polysaccharide synthesis was developed for enhancing polysaccharide production in suspension culture of protocorm-like bodies (PLBs) of Dendrobium huoshanense C.Z. Tang et S.J. Cheng. In growth stage, the original half-strength MS medium was optimized with carbon sources, nitrogen sources and metal ion combinations. The effects of different carbon sources on PLBs growth were remarkable and sucrose at 35 g l−1 was the most suitable. Sole nitrate nitrogen of 30 mmol l−1 was the best for PLBs growth. Metal ions (Ca2+, Fe2+, Mn2+ and Zn2+) showed different influences on PLBs growth. The optimal concentration of Ca2+, Fe2+, Mn2+ and Zn2+ was 4.5 mmol l−1, 0.1 mmol l−1, 0.5 mmol l−1 and 0.06 mmol l−1, respectively. In the optimized medium (sucrose, nitrate, Ca2+, Fe2+, Mn2+ and Zn2+ concentration as described above, the other component concentration seen in half-strength MS), 33.9 g DW l−1 PLBs were harvested after 30 days of culture and biomass increase was improved 245% as compared with that in the original medium. In production stage, polysaccharide synthesis was significantly improved by the feeding sucrose. The maximum polysaccharide production (22 g l−1) was obtained in the case of 50 g l−1 sucrose feeding at day 30 of culture, which was about 109-fold higher than that in the original medium without feeding of sucrose.

Keywords
Dendrobium huoshanense; Protocorm-like bodies (PLBs); Polysaccharide; Suspension culture
First Page Preview
Enhancement of polysaccharide production in suspension cultures of protocorm-like bodies from Dendrobium huoshanense by optimization of medium compositions and feeding of sucrose
Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 42, Issue 3, March 2007, Pages 344–351
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering