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An X, Liao Y, Yu Y, Fan J, Wan J, Wei Y, Ouyang Z. Effects of MhMYB1 and MhMYB2 transcription factors on the monoterpenoid biosynthesis pathway in l-menthol chemotype of Mentha haplocalyx Briq. PLANTA 2024; 260:3. [PMID: 38767800 DOI: 10.1007/s00425-024-04441-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2024] [Accepted: 05/13/2024] [Indexed: 05/22/2024]
Abstract
MAIN CONCLUSION Transcription factors MhMYB1 and MhMYB2 correlate with monoterpenoid biosynthesis pathway in l-menthol chemotype of Mentha haplocalyx Briq, which could affect the contents of ( -)-menthol and ( -)-menthone. Mentha haplocalyx Briq., a plant with traditional medicinal and edible uses, is renowned for its rich essential oil content. The distinct functional activities and aromatic flavors of mint essential oils arise from various chemotypes. While the biosynthetic pathways of the main monoterpenes in mint are well understood, the regulatory mechanisms governing different chemotypes remain inadequately explored. In this investigation, we identified and cloned two transcription factor genes from the M. haplocalyx MYB family, namely MhMYB1 (PP236792) and MhMYB2 (PP236793), previously identified by our research group. Bioinformatics analysis revealed that MhMYB1 possesses two conserved MYB domains, while MhMYB2 contains a conserved SANT domain. Yeast one-hybrid (Y1H) analysis results demonstrated that both MhMYB1 and MhMYB2 interacted with the promoter regions of MhMD and MhPR, critical enzymes in the monoterpenoid biosynthesis pathway of M. haplocalyx. Subsequent virus-induced gene silencing (VIGS) of MhMYB1 and MhMYB2 led to a significant reduction (P < 0.01) in the relative expression levels of MhMD and MhPR genes in the VIGS groups of M. haplocalyx. In addition, there was a noteworthy decrease (P < 0.05) in the contents of ( -)-menthol and ( -)-menthone in the essential oil of M. haplocalyx. These findings suggest that MhMYB1 and MhMYB2 transcription factors play a positive regulatory role in ( -)-menthol biosynthesis, consequently influencing the essential oil composition in the l-menthol chemotype of M. haplocalyx. This study serves as a pivotal foundation for unraveling the regulatory mechanisms governing monoterpenoid biosynthesis in different chemotypes of M. haplocalyx.
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Affiliation(s)
- Xin An
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, 212013, China
| | - Yangzhen Liao
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, 212013, China
| | - Yifan Yu
- School of Pharmacy, Jiangsu University, Zhenjiang, 212013, China
| | - Jiahe Fan
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, 212013, China
| | - Jingqiong Wan
- School of Pharmacy, Jiangsu University, Zhenjiang, 212013, China
| | - Yuan Wei
- School of Pharmacy, Jiangsu University, Zhenjiang, 212013, China
| | - Zhen Ouyang
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, 212013, China.
- School of Pharmacy, Jiangsu University, Zhenjiang, 212013, China.
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Zhan J, Di T, Chen X, Zheng T, Sun W, Yang M, Zhou M, Shen Z, Chen H, Su N. CbMYB108 integrates the regulation of diterpene biosynthesis and trichome development in Conyza blinii against UV-B. PLANT, CELL & ENVIRONMENT 2024; 47:1300-1318. [PMID: 38221803 DOI: 10.1111/pce.14809] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Revised: 12/03/2023] [Accepted: 12/28/2023] [Indexed: 01/16/2024]
Abstract
Plants synthesize abundant terpenes through glandular trichomes (GTs), thereby protecting themselves from environmental stresses and increasing the economic value in some medicinal plants. However, the potential mechanisms for simultaneously regulating terpenes synthesis and GTs development remain unclear. Here, we showed that terpenes in Conyza blinii could be synthesized through capitate GTs. By treating with appropriate intensity of UV-B, the density of capitate GTs and diterpene content can be increased. Through analyzing corresponding transcriptome, we identified a MYB transcription factor CbMYB108 as a positive regulator of both diterpene synthesis and capitate GT density. Transiently overexpressing/silencing CbMYB108 on C. blinii leaves could increase diterpene synthesis and capitate GT density. Further verification showed that CbMYB108 upregulated CbDXS and CbGGPPS expression in diterpene synthesis pathway. Moreover, CbMYB108 could also upregulated the expression of CbTTG1, key WD40 protein confirmed in this study to promote GT development, rather than through interaction between CbMYB108 and CbTTG1 proteins. Thus, results showed that the UV-B-induced CbMYB108 owned dual-function of simultaneously improving diterpene synthesis and GT development. Our research lays a theoretical foundation for cultivating C. blinii with high terpene content, and broadens the understanding of the integrated mechanism on terpene synthesis and GT development in plants.
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Affiliation(s)
- Junyi Zhan
- College of Life Science, Nanjing Agricultural University, Nanjing, China
- College of Life Science, Sichuan Agricultural University, Ya'an, China
| | - Tiantian Di
- College of Life Science, Nanjing Agricultural University, Nanjing, China
| | - Xuan Chen
- College of Life Science, Nanjing Agricultural University, Nanjing, China
| | - Tianrun Zheng
- Traditional Chinese Medicine Planting Institute, Chongqing Academy of Chinese Materia Medica, Chongqing College of Traditional Chinese Medicine, Chongqing, China
| | - Wenjun Sun
- College of Life Science, Sichuan Agricultural University, Ya'an, China
| | - Ming Yang
- College of Life Science, Sichuan Agricultural University, Ya'an, China
| | - Min Zhou
- College of Life Science, Sichuan Agricultural University, Ya'an, China
| | - Zhenguo Shen
- College of Life Science, Nanjing Agricultural University, Nanjing, China
| | - Hui Chen
- College of Life Science, Sichuan Agricultural University, Ya'an, China
| | - Nana Su
- College of Life Science, Nanjing Agricultural University, Nanjing, China
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Chen X, Li Y, Pang Y, Shen W, Chen Q, Liu L, Luo X, Chen Z, Li X, Li Y, Zhang Y, Huang M, Yuan C, Wang D, Guan L, Liu Y, Yang Q, Chen H, Wu H, Yu F. A comparative analysis of morphology, microstructure, and volatile metabolomics of leaves at varied developmental stages in Ainaxiang ( Blumea balsamifera (Linn.) DC.). FRONTIERS IN PLANT SCIENCE 2023; 14:1285616. [PMID: 38034556 PMCID: PMC10682096 DOI: 10.3389/fpls.2023.1285616] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Accepted: 10/26/2023] [Indexed: 12/02/2023]
Abstract
Introduction Ainaxiang (Blumea balsamifera (Linn.) DC.) is cultivated for the extraction of (-)-borneol and other pharmaceutical raw materials due to its abundant volatile oil. However, there is limited knowledge regarding the structural basis and composition of volatile oil accumulation in fresh B. balsamifera leaves. Methods To address this problem, we compare the fresh leaves' morphology, microstructure, and volatile metabonomic at different development stages, orderly defined from the recently unfolded young stage (S1) to the senescent stage (S4). Results and discussion Distinct differences were observed in the macro-appearance and microstructure at each stage, particularly in the B. balsamifera glandular trichomes (BbGTs) distribution. This specialized structure may be responsible for the accumulation of volatile matter. 213 metabolites were identified through metabolomic analysis, which exhibited spatiotemporal accumulation patterns among different stages. Notably, (-)-borneol was enriched at S1, while 10 key odor metabolites associated with the characteristic balsamic, borneol, fresh, and camphor aromas of B. balsamifera were enriched in S1 and S2. Ultra-microstructural examination revealed the involvement of chloroplasts, mitochondria, endoplasmic reticulum, and vacuoles in the synthesizing, transporting, and storing essential oils. These findings confirm that BbGTs serve as the secretory structures in B. balsamifera, with the population and morphology of BbGTs potentially serving as biomarkers for (-)-borneol accumulation. Overall, young B. balsamifera leaves with dense BbGTs represent a rich (-)-borneol source, while mesophyll cells contribute to volatile oil accumulation. These findings reveal the essential oil accumulation characteristics in B. balsamifera, providing a foundation for further understanding.
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Affiliation(s)
- Xiaolu Chen
- Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences/Key Laboratory of Biology and Cultivation of Herb Medicine (Haikou), Ministry of Agriculture and Rural Affairs/Hainan Provincial Engineering Research Center for Blumea balsamifera, Haikou, China
| | - Yanqun Li
- Medicinal Plants Research Center, South China Agricultural University, Guangzhou, China
| | - Yuxin Pang
- Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences/Key Laboratory of Biology and Cultivation of Herb Medicine (Haikou), Ministry of Agriculture and Rural Affairs/Hainan Provincial Engineering Research Center for Blumea balsamifera, Haikou, China
- School of Pharmacy, Guizhou University of Traditional Chinese Medicine, Guiyang, China
| | - Wanyun Shen
- Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences/Key Laboratory of Biology and Cultivation of Herb Medicine (Haikou), Ministry of Agriculture and Rural Affairs/Hainan Provincial Engineering Research Center for Blumea balsamifera, Haikou, China
- School of Pharmacy, Guizhou University of Traditional Chinese Medicine, Guiyang, China
| | - Qilei Chen
- School of Chinese Medicine, Hong Kong Baptist University, Hong Kong, Hong Kong SAR, China
| | - Liwei Liu
- Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences/Key Laboratory of Biology and Cultivation of Herb Medicine (Haikou), Ministry of Agriculture and Rural Affairs/Hainan Provincial Engineering Research Center for Blumea balsamifera, Haikou, China
- School of Traditional Chinese Medicine, Guangdong Pharmaceutical University, Guangzhou, China
| | - Xueting Luo
- Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences/Key Laboratory of Biology and Cultivation of Herb Medicine (Haikou), Ministry of Agriculture and Rural Affairs/Hainan Provincial Engineering Research Center for Blumea balsamifera, Haikou, China
- College of Tropical Crops, Yunnan Agricultural University, Puer, China
| | - Zhenxia Chen
- Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences/Key Laboratory of Biology and Cultivation of Herb Medicine (Haikou), Ministry of Agriculture and Rural Affairs/Hainan Provincial Engineering Research Center for Blumea balsamifera, Haikou, China
| | - Xingfei Li
- Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences/Key Laboratory of Biology and Cultivation of Herb Medicine (Haikou), Ministry of Agriculture and Rural Affairs/Hainan Provincial Engineering Research Center for Blumea balsamifera, Haikou, China
| | - Yulan Li
- Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences/Key Laboratory of Biology and Cultivation of Herb Medicine (Haikou), Ministry of Agriculture and Rural Affairs/Hainan Provincial Engineering Research Center for Blumea balsamifera, Haikou, China
| | - Yingying Zhang
- Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences/Key Laboratory of Biology and Cultivation of Herb Medicine (Haikou), Ministry of Agriculture and Rural Affairs/Hainan Provincial Engineering Research Center for Blumea balsamifera, Haikou, China
| | - Mei Huang
- Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences/Key Laboratory of Biology and Cultivation of Herb Medicine (Haikou), Ministry of Agriculture and Rural Affairs/Hainan Provincial Engineering Research Center for Blumea balsamifera, Haikou, China
| | - Chao Yuan
- Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences/Key Laboratory of Biology and Cultivation of Herb Medicine (Haikou), Ministry of Agriculture and Rural Affairs/Hainan Provincial Engineering Research Center for Blumea balsamifera, Haikou, China
| | - Dan Wang
- Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences/Key Laboratory of Biology and Cultivation of Herb Medicine (Haikou), Ministry of Agriculture and Rural Affairs/Hainan Provincial Engineering Research Center for Blumea balsamifera, Haikou, China
| | - Lingliang Guan
- Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences/Key Laboratory of Biology and Cultivation of Herb Medicine (Haikou), Ministry of Agriculture and Rural Affairs/Hainan Provincial Engineering Research Center for Blumea balsamifera, Haikou, China
| | - Yuchen Liu
- School of Pharmacy, Guizhou University of Traditional Chinese Medicine, Guiyang, China
| | - Quan Yang
- School of Traditional Chinese Medicine, Guangdong Pharmaceutical University, Guangzhou, China
| | - Hubiao Chen
- School of Chinese Medicine, Hong Kong Baptist University, Hong Kong, Hong Kong SAR, China
| | - Hong Wu
- Medicinal Plants Research Center, South China Agricultural University, Guangzhou, China
| | - Fulai Yu
- Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences/Key Laboratory of Biology and Cultivation of Herb Medicine (Haikou), Ministry of Agriculture and Rural Affairs/Hainan Provincial Engineering Research Center for Blumea balsamifera, Haikou, China
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