title: [Effect of spermine on cell growth and polysaccharide production in suspension cultures of protocorm-like bodies from Dendrobium huoshanense].
abstract: The effect of outer spermine on cell growth, accumulation of polysaccharides and utilization of nutrient together with the intracellular polyamine contents were investigated in suspension cultures of protocorm-like bodies from Dendrobium huoshanense. The results indicated that spermine at 0.6 mmol/L was the most effective in increasing cell growth and polysaccharide synthesis. The specific growth rate of cell increased from 0.046d(-1) to 0.054d(-1), and the maximum dry weight and polysaccharide production reached 32.4g DW/L and 2.46g/L respectively, which were 1.32-fold and 1.31-fold that of the control on day 30. The titres of intracellular free polyamines were higher in the cultures treated with spermine than that of the control. Invertase and nitrate reductase activities were found to increase significantly in the cultured cells treated with spermine, which was beneficial to the utilization of carbon and nitrogen source.
authors: School of Biotechnology and Food Engineering, Hefei University of Technology, Hefei 230009, China.
authors: Ming
authors: M
authors: Wei
authors: Shao-Tong
authors: ST
authors: Jiang
authors: Jian-Ping
authors: JP
authors: Luo
mesh_terms: D018533:Biomass; D002244:Carbon / Q000378:metabolism; D049109:Cell Proliferation / Q000187:drug effects*; D002478:Cells, Cultured; D031667:Dendrobium / Q000166:cytology / Q000187:drug effects* / Q000378:metabolism; D050901:Nitrate Reductase / Q000378:metabolism; D009584:Nitrogen / Q000378:metabolism; D010940:Plant Proteins / Q000378:metabolism; D018547:Plant Stems / Q000166:cytology / Q000187:drug effects / Q000378:metabolism; D011073:Polyamines / Q000378:metabolism; D011134:Polysaccharides / Q000096:biosynthesis*; D013096:Spermine / Q000494:pharmacology*; D013997:Time Factors; D043324:beta-Fructofuranosidase / Q000378:metabolism
chemical_list: D010940:Plant Proteins; D011073:Polyamines; D011134:Polysaccharides; D013096:Spermine; D002244:Carbon; D050901:Nitrate Reductase; D043324:beta-Fructofuranosidase; D009584:Nitrogen