PRODUCTION AND COMPOSITION OF EXTRACELLULAR POLYSACCHARIDE FROM CELL-SUSPENSION CULTURES OF MENTHA

被引:11
|
作者
UCHIYAMA, T
NUMATA, M
TERADA, S
HOSINO, T
机构
[1] Faculty of Agriculture, Niigata University, Niigata, 950-21, Ikarashi
关键词
EXTRACELLULAR POLYSACCHARIDE; MENTHA SUSPENSION CULTURE; PECTIC MATERIAL; XYLOGLUCAN;
D O I
10.1007/BF00029837
中图分类号
Q81 [生物工程学(生物技术)]; Q93 [微生物学];
学科分类号
071005 ; 0836 ; 090102 ; 100705 ;
摘要
A suspension culture of Mentha was established from callus which formed on the tips of young shoots of a Mentha hybrid (M. arvenis X M. spicata). Changes in growth parameters during a culture cycle were recorded. The general appearance of cells during division and growth, including the changes in cell form, was also represented. Suspension-cultured cells of Mentha hybrid released a large amount of extracellular polysaccharides (ECP) mainly at the logarithmic phase of the growth cycle. The ECP contained galacturonic acid as major components and arabinose, galactose, glucose, xylose, rhamnose and mannose as minor components. The ratio of the uronic acid content to total sugar content in the ECP was below 40% at day 7, but increased up to 90% at day 21. The relative contents of xylose and glucose in the ECP decreased during the culture period, while the arabinose content increased and those of rhamnose, mannose and galactose remained constant. The IR spectrum suggested that the ECP were low-methoxylated pectic polysaccharides. The presence of lignin and related compounds in the ECP was not detected. The protein content of the ECP was about 10% and the main amino acids were alanine, proline, hydroxyproline, valine, asparticacid and serine, in that order.
引用
收藏
页码:153 / 159
页数:7
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