In recent research by scientists from Southwest University, large changes in the volatile profiles and gene expression in terpenoid metabolism were observed in oleocellosis peels compared to healthy ones. Among volatiles, the decreased contents of α-pinene, d-limonene, β-myrcene, linalool, β-caryophyllene, α-terpineol, nonanal, neryl acetate and (−)-carvone played a major role in these changes. For gene expressions in terpenoid metabolism, the up-regulated genes aldehyde dehydrogenase (NAD+) (ALDH) and the down-regulated genes β-caryophyllene synthase 1 (BCS1), α-terpineol synthase 2 (TES2) and myrcene synthase (MS) were the main differences in oleocellosis peels.
Overview of the expression pattern of the genes involved in terpenoid metabolism of citrus fruit peel: Jincheng orange (a), Navel orange (b), and Ponkan mandarin (c). Genes were considered to be significant with log 2-fold change >1.00 and p < .05.
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J. Xie, L. Deng, Y. Zhou, S. Yao, K. Zeng (2017) Analysis of changes in volatile constituents and expression of genes involved in terpenoid metabolism in oleocellosis peel Food Chem. doi: 10.1016/j.foodchem.2017.09.142 [abstract]