Article

Non-volatile floral oils of Diascia spp. (Scrophulariaceae).

Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, D-06120 Halle, Germany.
Phytochemistry (impact factor: 3.35). 05/2008; 69(6):1372-83. DOI:10.1016/j.phytochem.2007.12.012
Source: PubMed

ABSTRACT The floral oils of Diascia purpurea, Diascia vigilis, Diascia cordata, Diascia megathura, Diascia integerrima and Diascia barberae (Scrophulariaceae) were selectively collected from trichome elaiophores. The derivatized floral oils were analyzed by gas chromatography-mass spectrometry (GC-MS), whilst the underivatized samples were analysed by electrospray ionization mass spectrometry (ESI-MS) and Fourier-transform ion cyclotron resonance mass spectrometry (FTICR-MS). The most common constituents of the floral oils investigated are partially acetylated acylglycerols of (3R)-acetoxy fatty acids (C(14), C(16), and C(18)), as was proven with non-racemic synthetic reference samples. The importance of these oils for Rediviva bees is discussed in a co-evolutionary context.

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Keywords

co-evolutionary context
 
common constituents
 
derivatized floral oils
 
Diascia barberae
 
Diascia cordata
 
Diascia integerrima
 
Diascia megathura
 
Diascia purpurea
 
Diascia vigilis
 
electrospray ionization mass spectrometry
 
floral oils
 
Fourier-transform ion cyclotron resonance mass spectrometry
 
gas chromatography-mass spectrometry
 
non-racemic synthetic reference samples
 
trichome elaiophores
 
underivatized samples