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Quinolizidine alkaloid status of Styphnolobium and Cladrastis (Leguminosae)
Authors:Geoffrey C Kite  R Toby Pennington
Institution:

a Royal Botanic Gardens, Kew, Richmond, Surrey TW9 3AB, UK

b Royal Botanic Garden Edinburgh, 20a Inverleith Row, Edinburgh EH3 5LR, UK

Abstract:Reports of quinolizidine alkaloids in Styphnolobium Schott and Cladrastis Raf. (Leguminosae) conflict with their position in recent molecular phylogenies because they are not members of a major clade of quinolizidine alkaloid-accumulating taxa. The alkaloid status of these two genera was therefore re-investigated using gas chromatography–mass spectrometry. Quinolizidine alkaloids could not be detected in extracts of leaves, flowers or seeds of S. japonicum (L.) Schott, nor in leaves of S. affine (Torrey & A. Gray) Walp., C. delavayi (Franch.) Prain, C. kentukea (Dum.-Cours.) Rudd or C. platycarpa Mak. In contrast, Calia secundiflora (Ortega) Yakovlev, also currently placed outside the major clade of quinolizidine alkaloid-producing genera in molecular phylogenies, was confirmed to accumulate a range of quinolizidine alkaloids.
Keywords:Styphnolobium  Cladrastis  Calia  Sophora  Leguminosae  Quinolizidine alkaloids  Chemosystematics  Gas chromatography–mass spectrometry
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