Coumarin and furanocoumarin quantities (mmol kg^-1 fresh weight) in the peel extracts of the 61 <i>Citrus</i> species investigated.

Abstract

<p>Coumarins are represented in orange; furanocoumarins of the bergapten cluster, in blue; furanocoumarins of the xanthotoxin cluster, in red; and furanocoumarins of the isopimpinellin cluster, in green. Ancestral taxa and secondary species are highlighted in the bottom of the graph. Sweet mandarins are presented in bright red, and acidic mandarins are illustrated in deep red.</p