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Tian S, Yang Y, Fang B, Uddin S, Liu X. The CrMYB33 transcription factor positively coordinate the regulation of both carotenoid accumulation and chlorophyll degradation in the peel of citrus fruit. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2024; 209:108540. [PMID: 38518398 DOI: 10.1016/j.plaphy.2024.108540] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2023] [Revised: 02/28/2024] [Accepted: 03/15/2024] [Indexed: 03/24/2024]
Abstract
Citrus, cultivated extensively across the globe, possesses considerable economic importance and nutritional value. With the degradation of chlorophyll and accumulation of carotenoids, mature citrus fruits develop an orange-yellow peel, enhancing fruit value and consumer preference. MYB transcription factors (TFs) exert a significant role in diverse plant developmental processes and investigating their involvement in fruit coloration is crucial for developing new cultivars. This work aimed to characterize a citrus TF, CrMYB33, whose expression was found to be positively correlated with carotenoid biosynthesis during fruit ripening. The interference of CrMYB33 expression in citrus fruit resulted in inhibition of carotenoid accumulation, down-regulation of carotenoid biosynthetic genes, and a slower rate of chlorophyll degradation. Conversely, overexpression of CrMYB33 in tomato (Solanum lycopersicum) enhanced chlorophyll degradation and carotenoid biosynthesis, resulting in a deeper red coloration of the fruits. Furthermore, the transcription of associated genes was upregulated in CrMYB33-overexpressing tomato fruits. Additional assays reveal that CrMYB33 exhibits direct links and activation of the promoters of lycopene β-cyclase 2 (CrLCYb2), and β-carotene hydroxylases 2 (CrBCH2), both crucial genes in the carotenoid biosynthetic pathway. Additionally, it was found to inhibit chlorophyllase (CrCLH), a gene essential in chlorophyll degradation. These findings provide insight into the observed changes in LCYb2, BCH2, and CLH expression in the transgenic lines under investigation. In conclusion, our study revealed that CrMYB33 modulates carotenoid accumulation and chlorophyll degradation in citrus fruits through transcriptionally activating genes involved in metabolic pathways.
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Affiliation(s)
- Shulin Tian
- College of Horticulture and Landscape Architecture, Southwest University, Chongqing, 400715, China; Key Laboratory of Agricultural Biosafety and Green Production of Upper Yangtze River (Ministry of Education), Southwest University, Chongqing, 400715, China
| | - Yuyan Yang
- College of Horticulture and Landscape Architecture, Southwest University, Chongqing, 400715, China
| | - Bo Fang
- Chongqing Academy of Agricultural Sciences, Chongqing, 401329, China
| | - Saleem Uddin
- College of Horticulture and Landscape Architecture, Southwest University, Chongqing, 400715, China
| | - Xiaogang Liu
- College of Horticulture and Landscape Architecture, Southwest University, Chongqing, 400715, China; Key Laboratory of Agricultural Biosafety and Green Production of Upper Yangtze River (Ministry of Education), Southwest University, Chongqing, 400715, China.
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Nagayoshi H, Murayama N, Kim V, Kim D, Takenaka S, Yamazaki H, Guengerich FP, Shimada T. Oxidation of Naringenin, Apigenin, and Genistein by Human Family 1 Cytochrome P450 Enzymes and Comparison of Interaction of Apigenin with Human P450 1B1.1 and Scutellaria P450 82D.1. Chem Res Toxicol 2023; 36:1778-1788. [PMID: 37783573 DOI: 10.1021/acs.chemrestox.3c00229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
Naringenin, an initial synthesized flavanone in various plant species, is further utilized for production of many biologically active flavonoids, e.g., apigenin, eriodictyol, and genistein, by various plant enzymes including cytochrome P450s (P450s or CYPs). We examined how these flavonoids are oxidized by human P450 family 1 and 2A enzymes. Naringenin was principally oxidized at the 3'-position to form eriodictyol by CYP1 enzymes more efficiently than by CYP2A enzymes, and the resulting eriodictyol was further oxidized to two penta-hydroxylated products. In contrast to plant P450 enzymes, these human P450s did not mediate the desaturation of naringenin and eriodictyol to give apigenin and luteolin, respectively. Apigenin was oxidized at the C3' and C6 positions to form luteolin and scutellarein by these P450s. CYP1B1.1 and 1B1.3 had high activities in apigenin 6-hydroxylation with a homotropic cooperative manner, as has been observed previously in chrysin 6-hydroxylation (Nagayoshi et al., Chem. Res. Toxicol. 2019, 32, 1268-1280). Molecular docking analysis suggested that CYP1B1 had two apigenin binding sites and showed similarities in substrate recognition sites to plant CYP82D.1, one of the enzymes in catalyzing apigenin and chrysin 6-hydroxylations in Scutellaria baicalensis. The present results suggest that human CYP1 enzymes and CYP2A13 in some reactions have important roles in the oxidation of naringenin, eriodictyol, apigenin, and genistein and that human CYP1B1 and Scutellaria CYP82D.1 have similarities in their SRS regions, catalyzing 6-hydroxylation of both apigenin and chrysin.
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Affiliation(s)
- Haruna Nagayoshi
- Food Chemistry Section, Division of Hygienic Chemistry, Osaka Institute of Public Health, Higashinari-ku, Osaka 537-0025, Japan
| | - Norie Murayama
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, Machida, Tokyo 194-8543, Japan
| | - Vitchan Kim
- Department of Biological Sciences, Konkuk University, Seoul 05025, Korea
| | - Donghak Kim
- Department of Biological Sciences, Konkuk University, Seoul 05025, Korea
| | - Shigeo Takenaka
- Department of Clinical Nutrition, Graduate School of Comprehensive Rehabilitation, Osaka Metropolitan University, Habikino, Osaka 583-8555, Japan
| | - Hiroshi Yamazaki
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, Machida, Tokyo 194-8543, Japan
| | - F Peter Guengerich
- Department of Biochemistry, School of Medicine, Vanderbilt University, Nashville, Tennessee 37232-0146, United States
| | - Tsutomu Shimada
- Department of Clinical Nutrition, Graduate School of Comprehensive Rehabilitation, Osaka Metropolitan University, Habikino, Osaka 583-8555, Japan
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Zheng J, Zhao C, Liao Z, Liu X, Gong Q, Zhou C, Liu Y, Wang Y, Cao J, Liu L, Wang D, Sun C. Functional characterization of two flavone synthase II members in citrus. HORTICULTURE RESEARCH 2023; 10:uhad113. [PMID: 37577395 PMCID: PMC10419818 DOI: 10.1093/hr/uhad113] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Accepted: 05/16/2023] [Indexed: 08/15/2023]
Abstract
Polymethoxylated flavones (PMFs), the main form of flavones in citrus, are derived from the flavone branch of the flavonoid biosynthesis pathway. Flavone synthases (FNSs) are enzymes that catalyze the synthesis of flavones from flavanones. However, the FNS in citrus has not been characterized yet. Here, we identified two type II FNSs, designated CitFNSII-1 and CitFNSII-2, based on phylogenetics and transcriptome analysis. Both recombinant CitFNSII-1 and CitFNSII-2 proteins directly converted naringenin, pinocembrin, and liquiritigenin to the corresponding flavones in yeast. In addition, transient overexpression of CitFNSII-1 and CitFNSII-2, respectively, in citrus peel significantly enhanced the accumulation of total PMFs, while virus-induced CitFNSII-1 and CitFNSII-2 genes silencing simultaneously significantly reduced the expression levels of both genes and total PMF content in citrus seedlings. CitFNSII-1 and CitFNSII-2 presented distinct expression patterns in different cultivars as well as different developmental stages. Methyl salicylate (MeSA) treatment reduced the CitFNSII-2 expression as well as the PMFs content in the peel of Citrus sinensis fruit but did not affect the CitFNSII-1 expression. These results indicated that both CitFNSII-1 and CitFNSII-2 participated in the flavone biosynthesis in citrus while the regulatory mechanism governing their expression might be specific. Our findings improved the understanding of the PMFs biosynthesis pathway in citrus and laid the foundation for further investigation on flavone synthesis regulation.
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Affiliation(s)
- Juan Zheng
- Plant Growth, Development and Quality Improvement, Zhejiang Provincial Key Laboratory of Integrative Biology of Horticultural Plants, Zhejiang University, Hangzhou, 310000, China
| | - Chenning Zhao
- Plant Growth, Development and Quality Improvement, Zhejiang Provincial Key Laboratory of Integrative Biology of Horticultural Plants, Zhejiang University, Hangzhou, 310000, China
| | - Zhenkun Liao
- Plant Growth, Development and Quality Improvement, Zhejiang Provincial Key Laboratory of Integrative Biology of Horticultural Plants, Zhejiang University, Hangzhou, 310000, China
| | - Xiaojuan Liu
- Plant Growth, Development and Quality Improvement, Zhejiang Provincial Key Laboratory of Integrative Biology of Horticultural Plants, Zhejiang University, Hangzhou, 310000, China
| | - Qin Gong
- Plant Growth, Development and Quality Improvement, Zhejiang Provincial Key Laboratory of Integrative Biology of Horticultural Plants, Zhejiang University, Hangzhou, 310000, China
| | - Chenwen Zhou
- Plant Growth, Development and Quality Improvement, Zhejiang Provincial Key Laboratory of Integrative Biology of Horticultural Plants, Zhejiang University, Hangzhou, 310000, China
| | - Yilong Liu
- Plant Growth, Development and Quality Improvement, Zhejiang Provincial Key Laboratory of Integrative Biology of Horticultural Plants, Zhejiang University, Hangzhou, 310000, China
| | - Yue Wang
- Plant Growth, Development and Quality Improvement, Zhejiang Provincial Key Laboratory of Integrative Biology of Horticultural Plants, Zhejiang University, Hangzhou, 310000, China
| | - Jinping Cao
- Plant Growth, Development and Quality Improvement, Zhejiang Provincial Key Laboratory of Integrative Biology of Horticultural Plants, Zhejiang University, Hangzhou, 310000, China
| | - Lili Liu
- Quzhou Academy of Agriculture and Forestry Science, Quzhou, 324000, China
| | - Dengliang Wang
- Quzhou Academy of Agriculture and Forestry Science, Quzhou, 324000, China
| | - Chongde Sun
- Plant Growth, Development and Quality Improvement, Zhejiang Provincial Key Laboratory of Integrative Biology of Horticultural Plants, Zhejiang University, Hangzhou, 310000, China
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Liu X, Gong Q, Zhao C, Wang D, Ye X, Zheng G, Wang Y, Cao J, Sun C. Genome-wide analysis of cytochrome P450 genes in Citrus clementina and characterization of a CYP gene encoding flavonoid 3'-hydroxylase. HORTICULTURE RESEARCH 2023; 10:uhac283. [PMID: 36818367 PMCID: PMC9930397 DOI: 10.1093/hr/uhac283] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Accepted: 12/07/2022] [Indexed: 06/18/2023]
Abstract
Cytochrome P450s (CYPs) are the largest family of enzymes in plant and play multifarious roles in development and defense but the available information about the CYP superfamily in citrus is very limited. Here we provide a comprehensive genome-wide analysis of the CYP superfamily in Citrus clementina genome, identifying 301 CYP genes grouped into ten clans and 49 families. The characteristics of both gene structures and motif compositions strongly supported the reliability of the phylogenetic relationship. Duplication analysis indicated that tandem duplication was the major driving force of expansion for this superfamily. Promoter analysis revealed numerous cis-acting elements related to various responsiveness. RNA-seq data elucidated their expression patterns in citrus fruit peel both during development and in response to UV-B. Furthermore, we characterize a UV-B-induced CYP gene (Ciclev10019637m, designated CitF3'H) as a flavonoid 3'-hydroxylase for the first time. CitF3'H catalyzed numerous flavonoids and favored naringenin in yeast assays. Virus-induced silencing of CitF3'H in citrus seedlings significantly reduced the levels of 3'-hydroxylated flavonoids and their derivatives. These results together with the endoplasmic reticulum-localization of CitF3'H in plant suggest that this enzyme is responsible for the biosynthesis of 3'-hydroxylated flavonoids in citrus. Taken together, our findings provide extensive information about the CYP superfamily in citrus and contribute to further functional verification.
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Affiliation(s)
- Xiaojuan Liu
- Laboratory of Fruit Quality Biology, The State Agriculture Ministry Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Zhejiang Provincial Key Laboratory of Integrative Biology of Horticultural Plants, Zhejiang University, Hangzhou, China
| | - Qin Gong
- Laboratory of Fruit Quality Biology, The State Agriculture Ministry Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Zhejiang Provincial Key Laboratory of Integrative Biology of Horticultural Plants, Zhejiang University, Hangzhou, China
| | - Chenning Zhao
- Laboratory of Fruit Quality Biology, The State Agriculture Ministry Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Zhejiang Provincial Key Laboratory of Integrative Biology of Horticultural Plants, Zhejiang University, Hangzhou, China
| | - Dengliang Wang
- Institute of Fruit Tree Research, Quzhou Academy of Agriculture and Forestry Acience, Quzhou, China
| | - Xianming Ye
- Research and Development Department, Zhejiang Jianong Fruit &Vegetable Co., Ltd, Quzhou, China
| | - Guixia Zheng
- Research and Development Department, Zhejiang Jianong Fruit &Vegetable Co., Ltd, Quzhou, China
| | - Yue Wang
- Laboratory of Fruit Quality Biology, The State Agriculture Ministry Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Zhejiang Provincial Key Laboratory of Integrative Biology of Horticultural Plants, Zhejiang University, Hangzhou, China
| | - Jinping Cao
- Laboratory of Fruit Quality Biology, The State Agriculture Ministry Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Zhejiang Provincial Key Laboratory of Integrative Biology of Horticultural Plants, Zhejiang University, Hangzhou, China
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Zhang W, Zeng Y, Jiao M, Ye C, Li Y, Liu C, Wang J. Integration of high-throughput omics technologies in medicinal plant research: The new era of natural drug discovery. FRONTIERS IN PLANT SCIENCE 2023; 14:1073848. [PMID: 36743502 PMCID: PMC9891177 DOI: 10.3389/fpls.2023.1073848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Accepted: 01/04/2023] [Indexed: 06/18/2023]
Abstract
Medicinal plants are natural sources to unravel novel bioactive compounds to satisfy human pharmacological potentials. The world's demand for herbal medicines is increasing year by year; however, large-scale production of medicinal plants and their derivatives is still limited. The rapid development of modern technology has stimulated multi-omics research in medicinal plants, leading to a series of breakthroughs on key genes, metabolites, enzymes involved in biosynthesis and regulation of active compounds. Here, we summarize the latest research progress on the molecular intricacy of medicinal plants, including the comparison of genomics to demonstrate variation and evolution among species, the application of transcriptomics, proteomics and metabolomics to explore dynamic changes of molecular compounds, and the utilization of potential resources for natural drug discovery. These multi-omics research provide the theoretical basis for environmental adaptation of medicinal plants and allow us to understand the chemical diversity and composition of bioactive compounds. Many medicinal herbs' phytochemical constituents and their potential health benefits are not fully explored. Given their large diversity and global distribution as well as the impacts of growth duration and environmental factors on bioactive phytochemicals in medicinal plants, it is crucial to emphasize the research needs of using multi-omics technologies to address basic and applied problems in medicinal plants to aid in developing new and improved medicinal plant resources and discovering novel medicinal ingredients.
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Affiliation(s)
- Wenting Zhang
- Guangdong Provincial Key Laboratory of Crops Genetics & Improvement, Crops Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, China
- Guangdong Provincial Engineering & Technology Research Center for Conservation and Utilization of the Genuine Southern Medicinal Resources, Guangzhou, China
| | - Yuan Zeng
- School of Plant and Environmental Sciences, Virginia Tech, VA, Blacksburg, United States
- Southern Piedmont Agricultural Research and Extension Center, Virginia Tech, VA, Blackstone, United States
| | - Meng Jiao
- College of Life Sciences, South China Agricultural University, Guangzhou, China
| | - Chanjuan Ye
- Rice Research Institute, Guangdong Rice Engineering Laboratory, Guangdong Key Laboratory of New Technology in Rice Breeding, Guangdong Academy of Agricultural Sciences, Guangzhou, China
| | - Yanrong Li
- College of Life Sciences, South China Agricultural University, Guangzhou, China
| | - Chuanguang Liu
- Rice Research Institute, Guangdong Rice Engineering Laboratory, Guangdong Key Laboratory of New Technology in Rice Breeding, Guangdong Academy of Agricultural Sciences, Guangzhou, China
| | - Jihua Wang
- Guangdong Provincial Key Laboratory of Crops Genetics & Improvement, Crops Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, China
- Guangdong Provincial Engineering & Technology Research Center for Conservation and Utilization of the Genuine Southern Medicinal Resources, Guangzhou, China
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6
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Costine B, Zhang M, Chhajed S, Pearson B, Chen S, Nadakuduti SS. Exploring native Scutellaria species provides insight into differential accumulation of flavones with medicinal properties. Sci Rep 2022; 12:13201. [PMID: 35915209 PMCID: PMC9343603 DOI: 10.1038/s41598-022-17586-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Accepted: 07/27/2022] [Indexed: 12/30/2022] Open
Abstract
Scutellaria baicalensis is a well-studied medicinal plant belonging to the Lamiaceae family, prized for the unique 4′-deoxyflavones produced in its roots. In this study, three native species to the Americas, S. lateriflora, S. arenicola, and S. integrifolia were identified by DNA barcoding, and phylogenetic relationships were established with other economically important Lamiaceae members. Furthermore, flavone profiles of native species were explored. 4′-deoxyflavones including baicalein, baicalin, wogonin, wogonoside, chrysin and 4′-hydroxyflavones, scutellarein, scutellarin, and apigenin, were quantified from leaves, stems, and roots. Qualitative, and quantitative differences were identified in their flavone profiles along with characteristic tissue-specific accumulation. 4′-deoxyflavones accumulated in relatively high concentrations in root tissues compared to aerial tissues in all species except S. lateriflora. Baicalin, the most abundant 4′-deoxyflavone detected, was localized in the roots of S. baicalensis and leaves of S. lateriflora, indicating differential accumulation patterns between the species. S. arenicola and S. integrifolia are phylogenetically closely related with similar flavone profiles and distribution patterns. Additionally, the S. arenicola leaf flavone profile was dominated by two major unknown peaks, identified using LC–MS/MS to most likely be luteolin-7-O-glucuronide and 5,7,2′-trihydroxy-6-methoxyflavone 7-O-glucuronide. Collectively, results presented in this study suggest an evolutionary divergence of flavonoid metabolic pathway in the Scutellaria genus of Lamiaceae.
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Affiliation(s)
- Blake Costine
- Department of Environmental Horticulture, University of Florida, Gainesville, FL, USA
| | - Mengzi Zhang
- Department of Environmental Horticulture, Mid-Florida Research and Education Center, University of Florida, Apopka, FL, USA
| | - Shweta Chhajed
- Department of Biology, Genetics Institute, University of Florida, Gainesville, FL, USA
| | - Brian Pearson
- Department of Environmental Horticulture, Mid-Florida Research and Education Center, University of Florida, Apopka, FL, USA
| | - Sixue Chen
- Department of Biology, Genetics Institute, University of Florida, Gainesville, FL, USA.,Plant Molecular and Cellular Biology Program, University of Florida, Gainesville, FL, USA
| | - Satya Swathi Nadakuduti
- Department of Environmental Horticulture, University of Florida, Gainesville, FL, USA. .,Plant Molecular and Cellular Biology Program, University of Florida, Gainesville, FL, USA.
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