文献类型：期刊文献

英文题名：Characterizations of MYB Transcription Factors in Camellia oleifera Reveal the Key Regulators Involved in Oil Biosynthesis

作者：Li, Sijia[1,2,3] Huang, Hu[1,2,3] Ma, Xianjin[1,2,3] Hu, Zhikang[1,2,3] Li, Jiyuan[3] Yin, Hengfu[1,3]

第一作者：Li, Sijia

通信作者：Yin, HF[1];Yin, HF[2]

机构：[1]Chinese Acad Forestry, Res Inst Subtrop Forestry, State Key Lab Tree Genet & Breeding, Hangzhou 311400, Peoples R China;[2]Nanjing Forestry Univ, Coll Informat Sci & Technol, Nanjing 210037, Peoples R China;[3]Chinese Acad Forestry, Res Inst Subtrop Forestry, Key Lab Forest Genet & Breeding, Hangzhou 311400, Peoples R China

年份：2022

卷号：8

期号：8

外文期刊名：HORTICULTURAE

收录：;Scopus(收录号：2-s2.0-85137524531);WOS:【SCI-EXPANDED(收录号:WOS:000845931500001)】；

基金：This research was supported by the Zhejiang Science and Technology Major Program on Agricultural New Variety Breeding (2021C02070-1) and Nonprofit Research Projects (CAFYBB2021QD001) of the Chinese Academy of Forestry.

语种：英文

外文关键词：genomic analysis; gene expression; gene family; MYB transcription factor; seed oil biosynthesis

摘要：MYB (myeloblastosis) transcription factors plays an important role in various physiological and biochemical processes in plants. However, little is known about the regulatory roles of MYB family genes underlying seed oil biosynthesis in Camellia oleifera. To identify potential regulators, we performed the genome-wide characterizations of the MYB family genes and their expression profiles in C. oleifera. A total of 186 CoMYB genes were identified, including 128 R2R3-type MYB genes that had conserved R2 and R3 domains. Phylogenetic analysis revealed the CoR2R3-MYBs formed 25 subgroups and possessed some highly conserved motifs outside the MYB DNA-binding domain. We investigated the promoter regions of CoR2R3-MYBs and revealed a series of cis-acting elements related to development, hormone response, and environmental stress response, suggesting a diversified regulatory mechanism of gene functions. In addition, we identified four tandem clusters containing eleven CoR2R3-MYBs, which indicated that tandem duplications played an important role in the expansion of the CoR2R3-MYB subfamily. Furthermore, we analyzed the global gene expression profiles at five stages during seed development and revealed seven CoR2R3-MYB genes that potentially regulated lipid metabolism and seed maturation in C. oleifera. These results provide new insights into understanding the function of the MYB genes and the genetic improvement of seed oil.