Acylglycerol and fatty acid components of pulp, seed, and whole olive fruit oils. Their use to characterize fruit variety by chemometrics.
The contents of triacylglycerols and diacylglycerols in three kinds of olive fruit oils (pulp, seed, and whole fruit) were determined. The fatty acid composition and the quality ratios 1,2-diacylglycerols/1,3-diacylglycerols and 1,2-diacylglycerols/total diacylglycerols were also assessed. Seven major Italian olive varieties were considered. Results of univariate statistical analyses indicated that the above analytical parameters (glyceridic ratios excepted) were effective in discriminating between pulp and seed oils. The seed oil fraction did not determine any change in the glyceridic indices and the acylglycerol or fatty acid composition concerning the whole fruit oil (mixture of pulp and seed oil fractions), the weight (%) of seed ( approximately 2%) being by far lower than the weight (%) of pulp ( approximately 85%) (fruit weight basis). Based on the data of triacylglycerol or fatty acid composition, and using appropriate parametric or nonparametric multivariate statistics, the genetic origins (olive variety) of the three fruit oil kinds were characterized.
Ranalli
Alfonso
A
Istituto Sperimentale per l'Elaiotecnica, Viale Petruzzi 75, 65013 Città S. Angelo, Pescara, Italy. elaiotec@unich.it
Pollastri
Luciano
L
Contento
Stefania
S
Di Loreto
Giuseppina
G
Iannucci
Emilia
E
Lucera
Lucia
L
Russi
Francesca
F
D004075:Diglycerides / Q000032:analysis; D005227:Fatty Acids / Q000032:analysis*; D005638:Fruit / Q000737:chemistry*; D005989:Glycerides / Q000032:analysis*; D029592:Oleaceae / Q000737:chemistry*; D000069463:Olive Oil; D010938:Plant Oils / Q000737:chemistry*; D012639:Seeds / Q000737:chemistry*; D014280:Triglycerides / Q000032:analysis
C011439:1,2-diacylglycerol; D004075:Diglycerides; D005227:Fatty Acids; D005989:Glycerides; D000069463:Olive Oil; D010938:Plant Oils; D014280:Triglycerides