Profiles of Gene Family Members Related to Carotenoid Accumulation in Citrus Genus
Xu Wei, Southwest University, College of Food Science, Chongqing, China | Hao Hu, Saskatoon Research Center, Agriculture and Agri-Food Canada, Saskatoon, Canada | Huarong Tong, Southwest University, College of Food Science, Chongqing, China | Frederick G. Gmitter Jr., University of Florida, Citrus Research and Education Center, FL, USA
Citrus fruit are an important reservoir of carotenoids. Numerous studies have been carried out to identify and profile the members of gene families involved in carotenoid biosynthetic pathway to explain the diversity of coloration in citrus fruit. It was found that gene expression analysis could not always explain the changes in carotenoid content and composition, indicating that other unknown genes and mechanisms should be operative. This review summarizes and updates the current knowledge on gene families involved in the citrus carotenoid biosynthetic pathway and their roles on the regulation of carotenoid biosynthesis, as well as provides insightful questions leading to future experimentation.
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