Leaf volatile compounds of six citrus somatic allotetraploid hybrids originating from various combinations of lime, lemon, citron, sweet orange, and grapefruit.
Volatile compounds were extracted by a pentane/ether (1:1) mixture from the leaves of six citrus somatic allotetraploid hybrids resulting from various combinations of lime, lemon, citron, sweet orange, and grapefruit. Extracts were examined by gas chromatography-mass spectrometry (GC-MS) and compared with those of their respective parents. All hybrids having an acid citrus parent exhibit the same relative contents in hydrocarbons and oxygenated compounds as the acid citrus, while the (grapefruit + orange) hybrid behaves similarly to its two parents. When volatile compound contents (microg g(-1)) are examined in detail, several behaviors are encountered in hybrids and seem to depend on the presence/absence of the considered parental compound and on the corresponding hybrid combination. Meanwhile, the sesquiterpene hydrocarbons are present in all hybrids at concentrations systematically lower than those of the highest parental producers. Statistical analyses show that hybrids exhibit hardly discriminable aromatic profiles, meaning that no strong dominance of one or the other parent was observed in hybrids with regards to the leaf volatile compound production.
Gancel
Anne-Laure
AL
Département FLHOR, Centre de Coopération Internationale en Recherche Agronomique pour le Développement (CIRAD), TA50/16, F-34398 Montpellier Cedex 5, France.
Ollitrault
Patrick
P
Froelicher
Yann
Y
Tomi
Felix
F
Jacquemond
Camille
C
Luro
Francois
F
Brillouet
Jean-Marc
JM
D002957:Citrus / Q000737:chemistry*; D032083:Citrus paradisi / Q000737:chemistry; D032084:Citrus sinensis / Q000737:chemistry; D008401:Gas Chromatography-Mass Spectrometry; D006824:Hybridization, Genetic; D009812:Odorants / Q000032:analysis*; D018515:Plant Leaves / Q000737:chemistry*; D014835:Volatilization