Abstract:
Objective To analyze the content of triacylglycerols (TAGs) in different oil-tea camellia cones.
Method The TAGs composition of six oil-tea camellia species and nine varieties of Camellia oleifera cones were analyzed by HPLC-MS and principal component analysis (PCA).
Result Twenty-four kinds of TAGs were detected, mainly OOO (triolein), OOL (1, 2-dioleoyl-3-linoleoyl-rac-glycerol) and OOP (1, 2-dioleoyl-3-palmitoyl-rac-glycerol). Among oil-tea camellia species, the cones of C. chekiangoleosa had the highest contents of OOO and OOL (21.18%, 17.70%), the common C.oleifera had the highest OOP content (14.62%). Among the common C. oleifera species, Changlin-166 had higher OOO (45.83%, Changlin-18 had higher OOL (21.05%), and Changlin-53 had higher OOP (16.90%), all of them were over 10%. The comprehensive evaluation ranking of TAGs was inconsistent with the oil content in different oil-tea camellia cones.
Conclusion From the analysis of oil content and PCA of TAGs, it is concluded that the nutritional value of C. chekiangoleosa is better among oil-tea camellia species and Changlin-21 is better among common varieties of C. oleifera. The results could provide references in the construction of fingerprint and quality identification of oil-tea camellia oil.