Narrow leaved lupin

The quinolizidine alkaloid content of seeds is usually 1-2% (w/w) and is responsible for the characteristic bitter taste of lupin seeds. The development of commercial cultivars of sweet varieties of narrow-leaved lupin Lupinus angustifolius) with quinolizidine alkaloid contents of less than 0.015% (w/w) has expanded the potential use of lupin as a food source (Figure 4.15). However, quinolizidine alkaloids are involved in the defence response in plants, and consequently sweet lupin varieties are less resistant to pathogens and herbivores (Ruiz and Sotelo 2001). 

FIGURE 24.7 Single [M + H] ions and UV chromatograms at 260- and 330-nm wavelengths of flavonoid compounds present in leaves of narrow-leafed lupine (Lupinus angustifolius) recorded using a hybrid LC/MS/UV system (photodiode array quadru-pole time-of-flight mass spectrometer) (reproduced from Reference [79]). 

FIGURE 24.9 Mass spectrum of chrysoeriol glucoside, xylosyl-glucoside (molecular weight [MW] = 754) from the leaves of narrow-leafed lupine Lupinus angustifolius) the substitution pattern could not be established on the basis of registered CID MS/ MS spectra (reproduced from Reference [79]). 

Muth, D., Kachlicki, E, Krajewski, R, Przystalski, M., Stobiecki, M. (2009) Differential metabolic response of narrow leafed lupine Lupiniis angustifolius) leaves to infection with Colletotrichum lupini. Metabolomics, 5, 354-362. 

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