title: Hydrolyzable tannins of tamaricaceous plants. IV: Micropropagation and ellagitannin production in shoot cultures of Tamarix tetrandra.
abstract: Shoot cultures of Tamarix tetrandra on Linsmaier-Skoog (LS) agar medium with 30 g l(-1) sucrose, 2.13 mg l(-1) indoleacetic acid and 2.25 mg l(-1) benzyl adenine produced ellagitannins found in intact plants of the Tamaricaceae. This was demonstrated by the isolation of 14 monomeric-tetrameric ellagitannins from the aq. Me2CO extract of the cultured tissues. This is the first report on the production of ellagitannin tetramers by plant tissue culture. The effects of light and certain medium constituents on tissue growth and ellagitannin production were examined. The contents of representative tannins of different types [i.e., tellimagrandin II (monomer), hirtellin A (linear GOG-type dimer), hirtellin B (hellinoyl-type dimer), hirtellin C (macrocyclic-type dimer), and hirtellin T1 (linear GOG-type trimer)] in the resultant tissues in response to these factors were estimated by HPLC, and the optimal condition for production of these tannins were established. Shoots cultured on LS hormone-free medium promoted root development, and regenerated plants could adapt to ordinary soil and climate. Acclimatized and intact T. tetrandra plants that were collected in November and May, respectively, demonstrated seasonal differences in individual ellagitannin contents. HPLC comparison of individual ellagitannin contents in different plant materials (i.e., leaves, stems, and roots) of intact T. tetrandra plants is also reported. The results are discussed with respect to cellular deposition and biosynthetic relationship of tannins.
authors.affiliation: Okayama University, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Tsushima, Okayama 700-8530, Japan.
authors.forename: Mohamed A A
authors.initials: MA
authors.lastname: Orabi
authors.forename: Shoko
authors.initials: S
authors.lastname: Taniguchi
authors.forename: Susumu
authors.initials: S
authors.lastname: Terabayashi
authors.forename: Tsutomu
authors.initials: T
authors.lastname: Hatano
mesh_terms: D003300:Copper / Q000494:pharmacology; D003470:Culture Media; D047348:Hydrolyzable Tannins / Q000737:chemistry / Q000302:isolation & purification / Q000378:metabolism*; D009584:Nitrogen / Q000494:pharmacology; D018520:Plant Shoots / Q000187:drug effects / Q000254:growth & development / Q000378:metabolism / Q000528:radiation effects; D012621:Seasons; D013395:Sucrose / Q000494:pharmacology; D032363:Tamaricaceae / Q000187:drug effects / Q000254:growth & development / Q000378:metabolism* / Q000528:radiation effects; D046509:Tissue Culture Techniques
chemical_list: D003470:Culture Media; D047348:Hydrolyzable Tannins; C013515:ellagitannin; D013395:Sucrose; D003300:Copper; D009584:Nitrogen