Molecular regulation of oil gland development and biosynthesis of essential oils in Citrus spp.

• 成果类型: Article
• 署名作者: Wang, Hongxing; Ren, Jie; Zhou, Shiyun; Duan, Yaoyuan; Zhu, Chenqiao; Chen, Chuanwu; Liu, Ziyan; Zheng, Qingyou; Xiang, Shu; Xie, Zongzhou; Wang, Xia; Chai, Lijun; Ye, Junli; Xu, Qiang; Guo, Wenwu; Deng, Xiuxin; Zhang, Fei
• 署名单位: Huazhong Agricultural University; Hubei Hongshan Laboratory
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-9218
• DOI: 10.1126/science.adl2953
• 发表日期: 2024-02-09
• 页码: 659-666
• 关键词: meristem identity; dornroschen-like; cell-division; gene; initiation; EVOLUTION; expression; induction; alignment; DEFENSE

摘要

Secretory structures in terrestrial plants serve as reservoirs for a variety of secondary metabolites. Among these, the secretory cavity of the Rutaceae family is notable for containing essential oils with a wide range of applications. However, the molecular basis underlying secretory cavity development is unknown. Here, we reveal a molecular framework for Citrus oil gland formation. Using genetic mapping and genome editing, we demonstrated that this process requires LATE MERISTEM IDENTITY1 (LMI1), a key regulator of leaf serration. A conserved GCC box element of the LMI1 promoter recruits DORNROSCHEN-like (DRNL) for transcriptional activation. This DRNL-LMI1 cascade triggers MYC5 activation, facilitating the development of oil glands and the biosynthesis of essential oils. Our findings spotlight cis-regulatory divergence within leaf shape genes, propelling novel functional tissue formation.