Accumulation of Polyphenolics and Differential Expression of Genes Related to Shikimate Pathway during Fruit Development and Maturation of Chinese Olive (Canarium album)

Phenolics in the Chinese olive (Canarium album (Lour.) Raeusch) fruit significantly affect its flavor and quality. The shikimate pathway is a bridge connecting primary metabolism secondary through which fixed carbon can be transformed into phenolics. In this study, we aimed to reveal relationship between phenolic compound biosynthesis. Three fruits (cv. Tanxiang (TX), Changying (CY) Lingfeng (LF)) with distinct were utilized as materials. results of study showed that synthesis accumulation quinate gallate active fruit. amount compounds was different among three cultivars. TX contained highest content ellagate, (iso)corilagin, conjugated quercetin kaempferol; CY luteolin; LF lowest gallate, hyperin, quercetin, kaempferol luteolin during development. expression 3-dehydroquinate/shikimate dehydrogenase gene-4 (DHD/SDH-4), 3-dehydroquinate synthase gene (DHQS), chorismate (CS) Chorismate mutase gene-1 (CM-1) increased maturing 3-Deoxy-D-arabino-heptulosonate-7-phosphate (DAHPS-1) most expressed TX, while barely CM-1 CY. gene-2 (CM-2) higher late cultivars DAHPS-1 genes (CMs) accumulated more CMs are proposed key for polyphenolic These proved had positive effect on phenols’ synthesis. Our provides new insight regulatory mechanism biosynthesis olive.