Abstract
The aim of this study is to reveal differences of volatile components of royal jelly (RJ) produced by different honeybee stocks. Volatile components of three RJ samples from high and low RJ production honeybee stocks were extracted by headspace-solid phase micro-extraction and analyzed by gas chromatography-mass spectrometry. Principal component analysis, hierarchical clustering analysis of the volatile components are suggestive of the fact that honeybee stock selected for increasing RJ yields (royal jelly bees) has shaped distinct volatile component profile compared with the unselected Italian bees. In total, 37 components were identified that could distinguish three RJ samples, including 5 aldehydes, 5 esters, 5 alkanes, 14 alcohols and phenols, 4 ketones and 4 other components. Our study provides the first characterization of volatile components in RJs and uncovered the differences among royal jelly secreted by different bee stocks.
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