Composition and morphology of cuticular wax in blueberry (Vaccinium spp.) fruits. (15th March 2017)

• Record Type: Journal Article
• Authors: Chu, Wenjing; Gao, Haiyan; Cao, Shifeng; Fang, Xiangjun; Chen, Hangjun; Xiao, Shangyue
• Is Part Of: Food chemistry. Volume 219(2017)
• Page Start: 436
• Page End: 442
• Publication Date: 2017-03-15
• Subjects: Cuticular wax -- Blueberries -- Chemical composition -- Morphology -- GC–MS -- SEM; Food -- Analysis -- Periodicals; Food -- Composition -- Periodicals; 664
• DOI: 10.1016/j.foodchem.2016.09.186
• Languages: English
• ISSNs: 0308-8146

Abstract

Highlights: Wax profile in blueberry fruits were determined using GC–MS and SEM. Two β -diketones were detected in the blueberry wax for the first time. Ursolic or oleanolic acid was the most abundant triterpenoids. Tube-type waxes were found in the fruits of all the examined cultivars. Abstract: The chemical composition and morphology of cuticular wax in mature fruit of nine blueberry cultivars were investigated using gas chromatography–mass spectrometry (GC–MS) and scanning electron microscope (SEM). Triterpenoids and β -diketones were the most prominent compounds, accounting for on average 64.2% and 16.4% of the total wax, respectively. Ursolic or oleanolic acid was identified as the most abundant triterpenoids differing in cultivars. Two β -diketones, hentriacontan-10, 12-dione and tritriacontan-12, 14-dione, were detected in cuticular wax of blueberry fruits for the first time. Notably, hentriacontan-10, 12-dione and tritriacontan-12, 14-dione were only detected in highbush ( V. corymbosum ) and rabbiteye ( V. ashei ) blueberries, respectively. The results of SEM showed that a large amount of tubular wax deposited on the surface of blueberry fruits. There was no apparent difference in wax morphology among the nine cultivars.