Carotenoid Biosynthetic Genes in Cabbage: Genome-Wide Identification, Evolution, and Expression Analysis

文献类型： 外文期刊

第一作者： Cao, Wenxue

作者： Cao, Wenxue;Wang, Peng;Yang, Limei;Fang, Zhiyuan;Zhang, Yangyong;Zhuang, Mu;Lv, Honghao;Wang, Yong;Ji, Jialei;Cao, Wenxue

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关键词： carotenoid biosynthetic genes; comparative genomics; Brassica oleracea; PSY (phytoene synthase) genes

期刊名称：GENES （ 影响因子：4.141； 五年影响因子：4.474 ）

ISSN：

年卷期： 2021 年 12 卷 12 期

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收录情况： SCI

摘要： Carotenoids are natural functional pigments produced by plants and microorganisms and play essential roles in human health. Cabbage (Brassica oleracea L. var. capitata L.) is an economically important vegetable in terms of production and consumption. It is highly nutritious and contains beta-carotene, lutein, and other antioxidant carotenoids. Here, we systematically analyzed carotenoid biosynthetic genes (CBGs) on the whole genome to understand the carotenoid biosynthetic pathway in cabbage. In total, 62 CBGs were identified in the cabbage genome, which are orthologs of 47 CBGs in Arabidopsis thaliana. Out of the 62 CBGs, 46 genes in cabbage were mapped to nine chromosomes. Evolutionary analysis of carotenoid biosynthetic orthologous gene pairs among B. oleracea, B. rapa, and A. thaliana revealed that orthologous genes of B. oleracea underwent a negative selection similar to that of B. rapa. Expression analysis of the CBGs showed functional differentiation of orthologous gene copies in B. oleracea and B. rapa. Exogenous phytohormone treatment suggested that ETH, ABA, and MeJA can promote some important CBGs expression in cabbage. Phylogenetic analysis showed that BoPSYs exhibit high conservatism. Subcellular localization analysis indicated that BoPSYs are located in the chloroplast. This study is the first to study carotenoid biosynthesis genes in cabbage and provides a basis for further research on carotenoid metabolic mechanisms in cabbage.

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