Chemical variability of peel and leaf essential oils of sour orange

Peel and leaf oils of 30 sour orange cultivars, belonging to four different species (C. aurantium L., C. myrtifolia Raf., C. natsudaidai Hay. and C. neo-aurantium Tan.) were obtained from fruits and leaves collected on sour orange trees submitted to the same pedoclimatic and horticultural conditions. Their chemical composition was investigated by capillary GC, GC–MS and 13C-NMR. Two chemotypes, limonene and limonene/β-pinene, were distinguished for peel oils, while four chemotypes, linalool/linalyl acetate, sabinene/(E)-β-ocimene, limonene/β-pinene and β-pinene/linalool, were observed for leaf oils.