文献类型： 外文期刊

作者： Lin, Ping ¹ ; Wang, Kailiang ¹ ; Zhou, Changfu ² ; Xie, Yunhai ³ ; Yao, Xiaohua ¹ ; Yin, Hengfu ¹ ;

作者机构： 1.Chinese Acad Forestry, Res Inst Subtrop Forestry, Hangzhou 311400, Zhejiang, Peoples R China

2.Hunan Acad Agr Sci, Inst Hort Res, Changsha 410125, Hunan, Peoples R China

3.Forestry Seedling Management Stn Zhejiang Prov, Hangzhou 310020, Zhejiang, Peoples R China

关键词： Camellia oleifera;transcriptomics;lipid biosynthesis;fatty acid;seed oil

期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：5.923； 五年影响因子：6.132 ）

ISSN： 1422-0067

年卷期： 2018 年 19 卷 1 期

页码：

收录情况： SCI

摘要： Camellia oleifera is a major tree species for producing edible oil. Its seed oil is well known for the high level of oleic acids; however, little is known regarding the molecular mechanism of lipid biosynthesis in C. oleifera. Here, we measured the oil contents and fatty acid (FA) compositions at four developmental stages and investigated the global gene expression profiles through transcriptomics sequencing. We identified differentially-expressed genes (DEGs) among the developmental stages and found that the distribution of numbers of DEGs was associated with the accumulation pattern of seed oil. Gene Ontology (GO) enrichment analysis revealed some critical biological processes related to oil accumulation, including lipid metabolism and phosphatidylcholine metabolism. Furthermore, we investigated the expression patterns of lipid biosynthesis genes. We showed that most of the genes were identified with single or multiple copies, and some had correlated profiles along oil accumulation. We proposed that the higher levels of stearoyl-ACP desaturases (SADs) coupled with lower activities of fatty acid desaturase 2 (FAD2) might be responsive to the boost of oleic acid at the late stage of C. oleifera seeds' development. This work presents a comprehensive transcriptomics study of C. oleifera seeds and uncovers valuable DEGs that are associated with the seed oil accumulation.