文献类型：期刊文献

英文题名：LcMYB106 suppresses monoterpene biosynthesis by negatively regulating LcTPS32 expression in Litsea cubeba

作者：Zhao, Yunxiao[1,2] Chen, Yicun[1,2] Gao, Ming[1,2] Wu, Liwen[1,2] Wang, Yangdong[1,2]

第一作者：赵耘霄

通信作者：Wang, YD[1];Wang, YD[2]

机构：[1]Chinese Acad Forestry, State Key Lab Tree Genet & Breeding, Xiangshan Rd, Beijing 100091, Peoples R China;[2]Chinese Acad Forestry, Res Inst Subtrop Forestry, Hangzhou 311400, Zhejiang, Peoples R China

年份：2023

外文期刊名：TREE PHYSIOLOGY

收录：;Scopus(收录号：2-s2.0-85179849792);WOS:【SCI-EXPANDED(收录号:WOS:001082710900001)】；

基金：This work was supported by the National Natural Science Foundation of China (32071804 and 32101561).

语种：英文

外文关键词：essential oil; MYB; terpene synthase

摘要：Litsea cubeba, the core species of the Lauraceae family, is valuable for the production of essential oils due to its high concentration of monoterpenes (90%). The key monoterpene synthase and metabolic regulatory network of monoterpene biosynthesis have provided new insights for improving essential oil content. However, there are few studies on the regulation mechanism of monoterpenes in L. cubeba. In this study, we investigated LcTPS32, a member of the TPS-b subfamily, and identified its function as an enzyme for the synthesis of monoterpenes, including geraniol, alpha-pinene, beta-pinene, beta-myrcene, linalool and eucalyptol. The quantitative real-time PCR analysis showed that LcTPS32 was highly expressed in the fruits of L. cubeba and contributed to the characteristic flavor of its essential oil. Overexpression of LcTPS32 resulted in a significant increase in the production of monoterpenes in L. cubeba by activating both the MVA and MEP pathways. Additionally, the study revealed that LcMYB106 played a negative regulatory role in monoterpenes biosynthesis by directly binding to the promoter of LcTPS32. Our study indicates that LcMYB106 could serve as a crucial target for metabolic engineering endeavors, aiming at enhancing the monoterpene biosynthesis in L. cubeba.