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'Indole Alkaloids' in keywords Facet   section ZfN Section C  [X]
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1982 (1)
1981 (1)
1Author    K.-H Knobloch, B. Hansen, J. Berlin, ForschungM B H, A. Bteilung, Pflanzliche Zellkulturen, M. Ascheroder WegRequires cookie*
 Title    Medium-Induced Formation of Indole Alkaloids and Concomitant Changes of Interrelated Enzyme Activities in Cell Suspension Cultures of Catharanthus roseus  
 Abstract    Recently m edium conditions have been developed which stim ulate the form ation of the indole alkaloid ajm alicine in cell suspension cultures o f Catharanthus roseus [6]. W hen cells were subjected to these conditions the alkaloid accum ulation was preceded by a 12-fold increase o f the specific activity o f tryptophan decarboxylase. The enzyme activity showed a maxim um two days after the cell transfer into the induction medium and subsequently declined. In contrast the activity of strictosidine synthase, the enzyme condensing tryptam ine and secologanin, was present over the entire measuring period at a constant level. The intracellular content of tryp­ tamine and ajmalicine increased during a period of 6 days after cell transfer and reached a plateau after that time. A possible regulatory function o f tryptophan decarboxylase in indole alkaloid biosynthesis is discussed. 
  Reference    Z. Naturforsch. 36c, 40—4 (1981); received N ovem ber 3 1980 
  Published    1981 
  Keywords    Catharanthus roseus, Indole Alkaloids, Tryptophan Decarboxylase, Strictosidine Synthase, Media Effects 
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 TEI-XML for    default:Reihe_C/36/ZNC-1981-36c-0040.pdf 
 Identifier    ZNC-1981-36c-0040 
 Volume    36 
2Author    Joachim Stöckigt, Karl-Heinz Pawelka, A. Na, R. Other, Brigitte DeusRequires cookie*
 Title    Indole Alkaloids from Cell Suspension Cultures of Stemmadenia tomentosa and Voacanga africana  
 Abstract    Cell suspension cultures o f Stemmadenia tomentosa synthesized under normal growth condition the eight major indole alkaloids: (-)-tabersonine, (—)-minovincinine, (+)-conoflorine (voaphyl-line), condylocarpine, (+)-tubotaiwine (dihydrocondylocarpine), (-)-norfluorocurarine (vin-canine), (-)-vinervine, and (—)-coronaridine. These alkaloids consist o f the three different types, Aspidosperma, Strychnos and Iboga. In contrast, cultures o f Voacanga africana produced mainly one alkaloid group (Aspidosperma-type) represented by (—)-tabersonine, lochnericine and (—)-minovincinine. Therefore this cell culture seems to be qualified for investigation concerning the biosynthesis o f Aspidosperma alkaloids. 
  Reference    Z. Naturforsch. 37c, 857—8 (1982); received June 3 1982 
  Published    1982 
  Keywords    Stemmadenia tomentosa var palmeri, Voacanga africana, Apocynaceae, Cell Suspension Cultures, Indole Alkaloids 
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 TEI-XML for    default:Reihe_C/37/ZNC-1982-37c-0857.pdf 
 Identifier    ZNC-1982-37c-0857 
 Volume    37