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Liu Y, Jin H, Zhang Y, Feng X, Dai Y, Zhu P. A novel three-layer module BoMYB1R1-BoMYB4b/BoMIEL1-BoDFR1 regulates anthocyanin accumulation in kale. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2024. [PMID: 38865101 DOI: 10.1111/tpj.16881] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2024] [Revised: 05/16/2024] [Accepted: 05/27/2024] [Indexed: 06/13/2024]
Abstract
Anthocyanin is an important pigment responsible for plant coloration and beneficial to human health. Kale (Brassica oleracea var. acephala), a primary cool-season flowers and vegetables, is an ideal material to study anthocyanin biosynthesis and regulation mechanisms due to its anthocyanin-rich leaves. However, the underlying molecular mechanism of anthocyanin accumulation in kale remains poorly understood. Previously, we demonstrated that BoDFR1 is a key gene controlling anthocyanin biosynthesis in kale. Here, we discovered a 369-bp InDel variation in the BoDFR1 promoter between the two kale inbred lines with different pink coloration, which resulted in reduced transcriptional activity of the BoDFR1 gene in the light-pink line. With the 369-bp insertion as a bait, an R2R3-MYB repressor BoMYB4b was identified using the yeast one-hybrid screening. Knockdown of the BoMYB4b gene led to increased BoDFR1 expression and anthocyanin accumulation. An E3 ubiquitin ligase, BoMIEL1, was found to mediate the degradation of BoMYB4b, thereby promoting anthocyanin biosynthesis. Furthermore, the expression level of BoMYB4b was significantly reduced by light signals, which was attributed to the direct repression of the light-signaling factor BoMYB1R1 on the BoMYB4b promoter. Our study revealed that a novel regulatory module comprising BoMYB1R1, BoMIEL1, BoMYB4b, and BoDFR1 finely regulates anthocyanin accumulation in kale. The findings aim to establish a scientific foundation for genetic improvement of leaf color traits in kale, meanwhile, providing a reference for plant coloration studies.
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Affiliation(s)
- Yang Liu
- College of Forestry, Shenyang Agricultural University, Shenyang, 110866, China
| | - Hangbiao Jin
- College of Forestry, Shenyang Agricultural University, Shenyang, 110866, China
| | - Yuting Zhang
- College of Forestry, Shenyang Agricultural University, Shenyang, 110866, China
| | - Xin Feng
- College of Forestry, Shenyang Agricultural University, Shenyang, 110866, China
- Key Laboratory of Forest Tree Genetics, Breeding and Cultivation of Liaoning Province, Shenyang, 110866, China
| | - Yujia Dai
- College of Forestry, Shenyang Agricultural University, Shenyang, 110866, China
| | - Pengfang Zhu
- College of Forestry, Shenyang Agricultural University, Shenyang, 110866, China
- Key Laboratory of Forest Tree Genetics, Breeding and Cultivation of Liaoning Province, Shenyang, 110866, China
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Guo D, Jiang H, Xie L. An R2R3-MYB Transcriptional Factor LuMYB314 Associated with the Loss of Petal Pigmentation in Flax ( Linum usitatissimum L.). Genes (Basel) 2024; 15:511. [PMID: 38674445 PMCID: PMC11050253 DOI: 10.3390/genes15040511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2024] [Revised: 04/14/2024] [Accepted: 04/16/2024] [Indexed: 04/28/2024] Open
Abstract
The loss of anthocyanin pigments is one of the most common evolutionary transitions in petal color, yet the genetic basis for these changes in flax remains largely unknown. In this study, we used crossing studies, a bulk segregant analysis, genome-wide association studies, a phylogenetic analysis, and transgenic testing to identify genes responsible for the transition from blue to white petals in flax. This study found no correspondence between the petal color and seed color, refuting the conclusion that a locus controlling the seed coat color is associated with the petal color, as reported in previous studies. The locus controlling the petal color was mapped using a BSA-seq analysis based on the F2 population. However, no significantly associated genomic regions were detected. Our genome-wide association study identified a highly significant QTL (BP4.1) on chromosome 4 associated with flax petal color in the natural population. The combination of a local Manhattan plot and an LD heat map identified LuMYB314, an R2R3-MYB transcription factor, as a potential gene responsible for the natural variations in petal color in flax. The overexpression of LuMYB314 in both Arabidopsis thaliana and Nicotiana tabacum resulted in anthocyanin deposition, indicating that LuMYB314 is a credible candidate gene for controlling the petal color in flax. Additionally, our study highlights the limitations of the BSA-seq method in low-linkage genomic regions, while also demonstrating the powerful detection capabilities of GWAS based on high-density genomic variation mapping. This study enhances our genetic insight into petal color variations and has potential breeding value for engineering LuMYB314 to develop colored petals, bast fibers, and seeds for multifunctional use in flax.
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Affiliation(s)
- Dongliang Guo
- Xinjiang Key Laboratory of Biological Resources and Genetic Engineering, College of Life Science and Technology, Xinjiang University, Urumqi 830017, China;
| | - Haixia Jiang
- Key Laboratory of Plant Stress Biology in Arid Land, College of Life Science, Xinjiang Normal University, Urumqi 830017, China;
| | - Liqiong Xie
- Xinjiang Key Laboratory of Biological Resources and Genetic Engineering, College of Life Science and Technology, Xinjiang University, Urumqi 830017, China;
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Li H, Yang J, Ma R, An X, Pan F, Zhang S, Fu Y. Genome-wide identification and expression analysis of MYB gene family in Cajanus cajan and CcMYB107 improves plant drought tolerance. PHYSIOLOGIA PLANTARUM 2023; 175:e13954. [PMID: 37318225 DOI: 10.1111/ppl.13954] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Revised: 06/06/2023] [Accepted: 06/12/2023] [Indexed: 06/16/2023]
Abstract
MYB transcription factor (TF) is one of the largest superfamilies that play a vital role in multiple plant biological processes. However, the MYB family has not been comprehensively identified and functionally verified in Cajanus cajan, which is the sixth most important legume crop. Here, 170 CcR2R3-MYBs were identified and divided into 43 functional subgroups. Segmental and tandem duplications and alternative splicing events were found and promoted the expansion of the CcR2R3-MYB gene family. Functional prediction results showed that CcR2R3-MYBs were mainly involved in secondary metabolism, cell fate and identity, developmental processes, and responses to abiotic stress. Cis-acting element analysis of promoters revealed that stress response elements were widespread in the above four functional branches, further suggesting CcR2R3-MYBs were extensively involved in abiotic stress response. The transcriptome data and qRT-PCR results indicated that most of the CcR2R3-MYB genes responded to various stresses, of which the expression of CcMYB107 was significantly induced by drought stress. Overexpression of CcMYB107 enhanced antioxidant enzyme activity and increased proline and lignin accumulation, thus improving the drought resistance of C. cajan. Furthermore, Overexpression of CcMYB107 up-regulated the expression of stress-related genes and lignin biosynthesis genes after drought stress. Our findings established a strong foundation for the investigation of biological function of CcR2R3-MYB TFs in C. cajan.
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Affiliation(s)
- Hongquan Li
- College of Chemistry, Chemical Engineering and Resource Utilization, Northeast Forestry University, Harbin, China
- Key Laboratory of Forest Plant Ecology, Ministry of Education, Northeast Forestry University, Harbin, Harbin, China
| | - Jie Yang
- College of Chemistry, Chemical Engineering and Resource Utilization, Northeast Forestry University, Harbin, China
- Key Laboratory of Forest Plant Ecology, Ministry of Education, Northeast Forestry University, Harbin, Harbin, China
| | - Ruijin Ma
- College of Chemistry, Chemical Engineering and Resource Utilization, Northeast Forestry University, Harbin, China
- Key Laboratory of Forest Plant Ecology, Ministry of Education, Northeast Forestry University, Harbin, Harbin, China
| | - Xiaoli An
- College of Chemistry, Chemical Engineering and Resource Utilization, Northeast Forestry University, Harbin, China
- Key Laboratory of Forest Plant Ecology, Ministry of Education, Northeast Forestry University, Harbin, Harbin, China
| | - Feng Pan
- College of Chemistry, Chemical Engineering and Resource Utilization, Northeast Forestry University, Harbin, China
- Key Laboratory of Forest Plant Ecology, Ministry of Education, Northeast Forestry University, Harbin, Harbin, China
| | - Su Zhang
- College of Forestry, Beijing Forestry University, Beijing, China
| | - Yujie Fu
- College of Forestry, Beijing Forestry University, Beijing, China
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Ye JH, Ye Y, Yin JF, Jin J, Liang YR, Liu RY, Tang P, Xu YQ. Bitterness and astringency of tea leaves and products: Formation mechanism and reducing strategies. Trends Food Sci Technol 2022. [DOI: 10.1016/j.tifs.2022.02.031] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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He Y, Wang Z, Ge H, Liu Y, Chen H. Weighted gene co-expression network analysis identifies genes related to anthocyanin biosynthesis and functional verification of hub gene SmWRKY44. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2021; 309:110935. [PMID: 34134842 DOI: 10.1016/j.plantsci.2021.110935] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2021] [Revised: 03/31/2021] [Accepted: 05/01/2021] [Indexed: 05/08/2023]
Abstract
Eggplant is rich in anthocyanins, which are thought to be highly beneficial for human health. There is no study on weighted gene co-expression network analysis (WGCNA) of anthocyanin biosynthesis in eggplant. Here, transcriptome data of 33 eggplant pericarp samples treated with light were used for WGCNA to identify significant modules. Total 13000 DEGs and 12 modules were identified, and the most significant module was associated with the secondary metabolites pathways. In addition, the hub gene SmWRKY44 with high connectivity was selected and its function was verified. The expression of SmWRKY44 showed a significant correlation with anthocyanin accumulation in the eggplant peels, leaves, and flowers. SmWRKY44-OE Arabidopsis significantly increased the accumulation of anthocyanins. Yeast two-hybrid and BiFC assays showed that SmWRKY44 could interact with SmMYB1, and it was also found that they could jointly promote the biosynthesis of anthocyanins in eggplant leaves through transient expression analysis. Our work provides a new direction for studying the molecular mechanism of light-induced anthocyanin biosynthesis in eggplant.
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Affiliation(s)
- Yongjun He
- School of Agriculture and Biology, Shanghai JiaoTong University, 800 Dongchuan Road, Minhang District, Shanghai, 200240, China.
| | - Zhaowei Wang
- School of Agriculture and Biology, Shanghai JiaoTong University, 800 Dongchuan Road, Minhang District, Shanghai, 200240, China.
| | - Haiyan Ge
- School of Agriculture and Biology, Shanghai JiaoTong University, 800 Dongchuan Road, Minhang District, Shanghai, 200240, China.
| | - Yang Liu
- School of Agriculture and Biology, Shanghai JiaoTong University, 800 Dongchuan Road, Minhang District, Shanghai, 200240, China.
| | - Huoying Chen
- School of Agriculture and Biology, Shanghai JiaoTong University, 800 Dongchuan Road, Minhang District, Shanghai, 200240, China.
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Yang J, Song HD, Chen Y, Chen B, Kim M, Kim P, Kawabata S, Li Y, Wang Y. A single amino acid substitution in the R2R3 conserved domain of the BrPAP1a transcription factor impairs anthocyanin production in turnip (Brassica rapa subsp. rapa). PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2021; 162:124-136. [PMID: 33676299 DOI: 10.1016/j.plaphy.2021.02.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Accepted: 02/10/2021] [Indexed: 05/27/2023]
Abstract
The purple pigmentation in the epidermis of swollen roots of 'Tsuda' turnip (Brassica rapa subsp. rapa) is induced by light, providing a good system to investigate the genetic mechanism of light-dependent anthocyanin biosynthesis in B. rapa. Here, we identified the R2R3 MYB transcription factor gene PRODUCTION OF ANTHOCYANIN PIGMENT1 (BrPAP1a) as the critical gene in the anthocyanin-defective mutant w68. A nucleotide mutation in the turn region of the R3 domain was screened, which caused an amino acid substitution from glycine to serine (G94S). Functional analysis showed that the interaction of BrPAP1a with two bHLH factors ENHANCER OF GLABRA 3 (BrEGL3) and TRANSPARENT TESTA 8 (BrTT8) were impaired by the mutation. Expression of BrTT8 was activated by BrPAP1a and enhanced by MYB-bHLH-WDR (MBW) complexes, but blocked by the mutation. Furthermore, BrPAP1a directly bound the MYB-recognizing element (MRE) in the BrTT8 promoter, while the G94S substitution caused a loss of DNA-binding activity. Our findings indicate that G94 is required for protein interaction with BrTT8 and BrEGL3 and DNA-binding of BrPAP1a to activate BrTT8 expression, which leads to anthocyanin biosynthesis. Collectively, our data indicate the importance of the highly conserved amino acids within R2R3 MYB proteins in regulating anthocyanin biosynthesis and could aid programs to increase anthocyanins in turnip roots.
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Affiliation(s)
- Jianfei Yang
- Key Laboratory of Saline-alkali Vegetation Ecology Restoration (Northeast Forestry University), Ministry of Education, Harbin, 150040, China; College of Life Science, Northeast Forestry University, Harbin, 150040, China.
| | - Hyon Dok Song
- Key Laboratory of Saline-alkali Vegetation Ecology Restoration (Northeast Forestry University), Ministry of Education, Harbin, 150040, China; College of Life Science, Northeast Forestry University, Harbin, 150040, China.
| | - Yunzhu Chen
- Key Laboratory of Saline-alkali Vegetation Ecology Restoration (Northeast Forestry University), Ministry of Education, Harbin, 150040, China; College of Life Science, Northeast Forestry University, Harbin, 150040, China.
| | - Bowei Chen
- Key Laboratory of Saline-alkali Vegetation Ecology Restoration (Northeast Forestry University), Ministry of Education, Harbin, 150040, China; College of Life Science, Northeast Forestry University, Harbin, 150040, China.
| | - Minjun Kim
- Key Laboratory of Saline-alkali Vegetation Ecology Restoration (Northeast Forestry University), Ministry of Education, Harbin, 150040, China; College of Life Science, Northeast Forestry University, Harbin, 150040, China.
| | - Pyol Kim
- Key Laboratory of Saline-alkali Vegetation Ecology Restoration (Northeast Forestry University), Ministry of Education, Harbin, 150040, China; College of Life Science, Northeast Forestry University, Harbin, 150040, China.
| | - Saneyuki Kawabata
- Institute for Sustainable Agroecosystem Services, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Midoricho, Nishitokyo, Tokyo, 188-0002, Japan.
| | - Yuhua Li
- Key Laboratory of Saline-alkali Vegetation Ecology Restoration (Northeast Forestry University), Ministry of Education, Harbin, 150040, China; College of Life Science, Northeast Forestry University, Harbin, 150040, China.
| | - Yu Wang
- Key Laboratory of Saline-alkali Vegetation Ecology Restoration (Northeast Forestry University), Ministry of Education, Harbin, 150040, China; College of Life Science, Northeast Forestry University, Harbin, 150040, China.
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7
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Lin N, Liu X, Zhu W, Cheng X, Wang X, Wan X, Liu L. Ambient Ultraviolet B Signal Modulates Tea Flavor Characteristics via Shifting a Metabolic Flux in Flavonoid Biosynthesis. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:3401-3414. [PMID: 33719437 DOI: 10.1021/acs.jafc.0c07009] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Tea leaves contain an extraordinarily high level of flavonoids that contribute to tea health benefits and flavor characteristics, but the regulatory mechanism of ambient ultraviolet B (UV-B) on tea flavonoid enrichment remains unclear. Here, we report that ambient UV-B modulates tea quality by inducing a metabolic flux in flavonoid biosynthesis. UV-B absence decreased bitter- and astringent-tasting flavonol glycosides (kaempferol-7-O-glucoside, myricetin-3-O-glucoside, and quercetin-7-O-glucoside) but increased non-galloylated catechins. Conversely, supplementary UV-B increased flavonols and decreased catechins in tea leaves. These responses were achieved via CsHY5, which mediates the UV-B-induced MYB12 activation and binds to the promoters of flavonoid biosynthetic genes (CsFLS, CsLARa, and CsDFRa), leading to flavonoid changes. Transcriptomic data indicated that UV-B-induced tea flavonoid regulation is responsive to multiple biotic and abiotic environmental stresses. These findings improve our understanding of light-regulated tea astringency and bitterness underlying shading effects and seasonal light changes and provide novel insights into tea cultivation management and processing.
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Affiliation(s)
- Ning Lin
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei, Anhui 230036, People's Republic of China
| | - Xuyang Liu
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei, Anhui 230036, People's Republic of China
| | - Wenfeng Zhu
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei, Anhui 230036, People's Republic of China
| | - Xin Cheng
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei, Anhui 230036, People's Republic of China
| | - Xiaohui Wang
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei, Anhui 230036, People's Republic of China
| | - Xiaochun Wan
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei, Anhui 230036, People's Republic of China
| | - Linlin Liu
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei, Anhui 230036, People's Republic of China
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8
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Yan H, Pei X, Zhang H, Li X, Zhang X, Zhao M, Chiang VL, Sederoff RR, Zhao X. MYB-Mediated Regulation of Anthocyanin Biosynthesis. Int J Mol Sci 2021; 22:3103. [PMID: 33803587 PMCID: PMC8002911 DOI: 10.3390/ijms22063103] [Citation(s) in RCA: 129] [Impact Index Per Article: 43.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Revised: 03/11/2021] [Accepted: 03/15/2021] [Indexed: 11/16/2022] Open
Abstract
Anthocyanins are natural water-soluble pigments that are important in plants because they endow a variety of colors to vegetative tissues and reproductive plant organs, mainly ranging from red to purple and blue. The colors regulated by anthocyanins give plants different visual effects through different biosynthetic pathways that provide pigmentation for flowers, fruits and seeds to attract pollinators and seed dispersers. The biosynthesis of anthocyanins is genetically determined by structural and regulatory genes. MYB (v-myb avian myeloblastosis viral oncogene homolog) proteins are important transcriptional regulators that play important roles in the regulation of plant secondary metabolism. MYB transcription factors (TFs) occupy a dominant position in the regulatory network of anthocyanin biosynthesis. The TF conserved binding motifs can be combined with other TFs to regulate the enrichment and sedimentation of anthocyanins. In this study, the regulation of anthocyanin biosynthetic mechanisms of MYB-TFs are discussed. The role of the environment in the control of the anthocyanin biosynthesis network is summarized, the complex formation of anthocyanins and the mechanism of environment-induced anthocyanin synthesis are analyzed. Some prospects for MYB-TF to modulate the comprehensive regulation of anthocyanins are put forward, to provide a more relevant basis for further research in this field, and to guide the directed genetic modification of anthocyanins for the improvement of crops for food quality, nutrition and human health.
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Affiliation(s)
- Huiling Yan
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin 150040, China; (H.Y.); (H.Z.); (X.L.); (X.Z.); (M.Z.); (V.L.C.)
| | - Xiaona Pei
- Harbin Research Institute of Forestry Machinery, State Administration of Forestry and Grassland, Harbin 150086, China;
- Research Center of Cold Temperate Forestry, CAF, Harbin 150086, China
| | - Heng Zhang
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin 150040, China; (H.Y.); (H.Z.); (X.L.); (X.Z.); (M.Z.); (V.L.C.)
| | - Xiang Li
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin 150040, China; (H.Y.); (H.Z.); (X.L.); (X.Z.); (M.Z.); (V.L.C.)
| | - Xinxin Zhang
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin 150040, China; (H.Y.); (H.Z.); (X.L.); (X.Z.); (M.Z.); (V.L.C.)
| | - Minghui Zhao
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin 150040, China; (H.Y.); (H.Z.); (X.L.); (X.Z.); (M.Z.); (V.L.C.)
| | - Vincent L. Chiang
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin 150040, China; (H.Y.); (H.Z.); (X.L.); (X.Z.); (M.Z.); (V.L.C.)
- Forest Biotechnology Group, Department of Forestry and Environmental Resources, North Carolina State University, Raleigh, NC 27695, USA;
| | - Ronald Ross Sederoff
- Forest Biotechnology Group, Department of Forestry and Environmental Resources, North Carolina State University, Raleigh, NC 27695, USA;
| | - Xiyang Zhao
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin 150040, China; (H.Y.); (H.Z.); (X.L.); (X.Z.); (M.Z.); (V.L.C.)
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Shi J, Zhang X, Zhang Y, Lin X, Li B, Chen Z. Integrated metabolomic and transcriptomic strategies to understand the effects of dark stress on tea callus flavonoid biosynthesis. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2020; 155:549-559. [PMID: 32846390 DOI: 10.1016/j.plaphy.2020.07.048] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Revised: 07/15/2020] [Accepted: 07/31/2020] [Indexed: 05/18/2023]
Abstract
Flavonoid biosynthesis is a crucial secondary metabolism process for tea plants. Its metabolism is affected by multiple environmental factors, especially light. Shade, also known as dark stress (DS), is generally used during cultivation to improve tea quality by influencing the flavonoid accumulation. To explore the molecular mechanisms of flavonoid biosynthesis under DS, metabolomics and transcriptomics (METR) analyses were performed in tea callus via culturing the plants in vitro using 12 h light/12 h dark cycles (A) or completely dark (B) conditions for 30 days. In total, 161 differential metabolic products (DMPs) and 3592 differential expression genes (DEGs) were identified. The major flavonoids including epicatechin gallate, catechin gallate, gallocatechin-catechin, cyanidin 3-O-glucoside and the total of catechin, anthocyanin and proanthocyanidin contents were all remarkably down-regulated in tea callus under DS. Meanwhile, 9 genes including CsPAL, Cs4CL, CsCHS, CsFLS, CsDFR, CsANS, CsLAR, CsANR, and CsUFGT determined to be responsible for the flavonoid biosynthesis. In addition, 2 transcription factors (TFs) including CsMYBT1 and CsMYBT2 verified to play key role in regulation the flavonoid biosynthesis. These results helped us further understand the underlying molecular mechanism of flavonoid metabolism in tea plants.
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Affiliation(s)
- Jing Shi
- College of Food Science, South China Agricultural University, 483 Wushan Street, Tianhe District, Guangzhou, Guangdong, PR China
| | - Xue Zhang
- College of Food Science, South China Agricultural University, 483 Wushan Street, Tianhe District, Guangzhou, Guangdong, PR China
| | - Yuanyuan Zhang
- College of Food Science, South China Agricultural University, 483 Wushan Street, Tianhe District, Guangzhou, Guangdong, PR China
| | - Xiaorong Lin
- College of Food Science, South China Agricultural University, 483 Wushan Street, Tianhe District, Guangzhou, Guangdong, PR China
| | - Bin Li
- College of Food Science, South China Agricultural University, 483 Wushan Street, Tianhe District, Guangzhou, Guangdong, PR China; Guangdong Provincial Key Laboratory of Nutraceuticals and Functional Foods, South China Agricultural University, Guangzhou, Guangdong, PR China
| | - Zhongzheng Chen
- College of Food Science, South China Agricultural University, 483 Wushan Street, Tianhe District, Guangzhou, Guangdong, PR China; Guangdong Provincial Key Laboratory of Nutraceuticals and Functional Foods, South China Agricultural University, Guangzhou, Guangdong, PR China.
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Marsafari M, Samizadeh H, Rabiei B, Mehrabi A, Koffas M, Xu P. Biotechnological Production of Flavonoids: An Update on Plant Metabolic Engineering, Microbial Host Selection, and Genetically Encoded Biosensors. Biotechnol J 2020; 15:e1900432. [DOI: 10.1002/biot.201900432] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Revised: 02/19/2020] [Indexed: 12/24/2022]
Affiliation(s)
- Monireh Marsafari
- Department of ChemicalBiochemical, and Environmental EngineeringUniversity of Maryland Baltimore MD 21250 USA
- Department of Agronomy and Plant BiotechnologyUniversity of Guilan Rasht 44052 Iran
| | - Habibollah Samizadeh
- Department of Agronomy and Plant BiotechnologyUniversity of Guilan Rasht 44052 Iran
| | - Babak Rabiei
- Department of Agronomy and Plant BiotechnologyUniversity of Guilan Rasht 44052 Iran
| | | | - Mattheos Koffas
- Department of Chemical and Biological EngineeringRensselaer Polytechnic Institute Troy NY 12180 USA
| | - Peng Xu
- Department of ChemicalBiochemical, and Environmental EngineeringUniversity of Maryland Baltimore MD 21250 USA
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Zhou L, He Y, Li J, Liu Y, Chen H. CBFs Function in Anthocyanin Biosynthesis by Interacting with MYB113 in Eggplant (Solanum melongena L.). PLANT & CELL PHYSIOLOGY 2020; 61:416-426. [PMID: 31725150 DOI: 10.1093/pcp/pcz209] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2019] [Accepted: 10/31/2019] [Indexed: 05/12/2023]
Abstract
Eggplant is rich in anthocyanins. R2R3-MYB transcription factors play a key role in the anthocyanin pathway. Low temperature is vital abiotic stress that affects the anthocyanin biosynthesis in plants. CBFs (C-repeat binding factors) act as central regulators in cold response. In this study, we found that SmCBF1, SmCBF2 and SmCBF3, via their C-terminal, physically interacted with SmMYB113, a key regulator of anthocyanin biosynthesis in eggplant. SmCBF2 and SmCBF3 upregulated the expression of SmCHS and SmDFR via a SmMYB113-dependent pathway. In addition, the transient expression assays demonstrated that co-infiltrating SmCBFs and SmMYB113 significantly improved the contents of anthocyanin and the expression levels of anthocyanin structural genes in tobacco. When SmTT8, a bHLH partner of SmMYB113, coexpressed with SmCBFs and SmMYB113, the anthocyanin contents were significantly enhanced compared with SmCBFs and SmMYB113. Furthermore, overexpression of SmCBF2 and SmCBF3 could facilitate the anthocyanin accumulation under cold conditions in Arabidopsis. Taken together, these results shed light on the functions of SmCBFs and potential mechanisms of low-temperature-induced anthocyanin biosynthesis in eggplant.
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Affiliation(s)
- Lu Zhou
- School of Agriculture and Biology, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, Shanghai 200240, China
| | - Yongjun He
- School of Agriculture and Biology, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, Shanghai 200240, China
| | - Jing Li
- School of Agriculture and Biology, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, Shanghai 200240, China
| | - Yang Liu
- School of Agriculture and Biology, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, Shanghai 200240, China
| | - Huoying Chen
- School of Agriculture and Biology, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, Shanghai 200240, China
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Deng GM, Zhang S, Yang QS, Gao HJ, Sheng O, Bi FC, Li CY, Dong T, Yi GJ, He WD, Hu CH. MaMYB4, an R2R3-MYB Repressor Transcription Factor, Negatively Regulates the Biosynthesis of Anthocyanin in Banana. FRONTIERS IN PLANT SCIENCE 2020; 11:600704. [PMID: 33488646 PMCID: PMC7817548 DOI: 10.3389/fpls.2020.600704] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2020] [Accepted: 11/23/2020] [Indexed: 05/22/2023]
Abstract
Anthocyanins spatiotemporally accumulate in certain tissues of particular species in the banana plant, and MYB transcription factors (TFs) serve as their primary regulators. However, the precise regulatory mechanism in banana remains to be determined. Here, we report the identification and characterization of MaMYB4, an R2R3-MYB repressor TF, characterized by the presence of EAR (ethylene-responsive element binding factor-associated amphiphilic repression) and TLLLFR motifs. MaMYB4 expression was induced by the accumulation of anthocyanins. Transgenic banana plants overexpressing MaMYB4 displayed a significant reduction in anthocyanin compared to wild type. Consistent with the above results, metabolome results showed that there was a decrease in all three identified cyanidins and one delphinidin, the main anthocyanins that determine the color of banana leaves, whereas both transcriptome and reverse transcription-quantitative polymerase chain reaction analysis showed that many key anthocyanin synthesis structural genes and TF regulators were downregulated in MaMYB4 overexpressors. Furthermore, dual-luciferase assays showed that MaMYB4 was able to bind to the CHS, ANS, DFR, and bHLH promoters, leading to inhibition of their expression. Yeast two-hybrid analysis verified that MaMYB4 did not interact with bHLH, which ruled out the possibility that MaMYB4 could be incorporated into the MYB-bHLH-WD40 complex. Our results indicated that MaMYB4 acts as a repressor of anthocyanin biosynthesis in banana, likely due to a two-level repression mechanism that consists of reduced expression of anthocyanin synthesis structural genes and the parallel downregulation of bHLH to interfere with the proper assembly of the MYB-bHLH-WD40 activation complex. To the best of our knowledge, this is the first MYB TF that regulates anthocyanin synthesis that was identified by genetic methods in bananas, which will be helpful for manipulating anthocyanin coloration in banana programs in the future.
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Affiliation(s)
- Gui-Ming Deng
- Institute of Fruit Tree Research, Guangdong Academy of Agricultural Sciences/Key Laboratory of South Subtropical Fruit Biology and Genetic Resource Utilization (Ministry of Agriculture and Rural Affairs)/Guangdong Province Key Laboratory of Tropical and Subtropical Fruit Tree Research, Guangzhou, China
| | - Sen Zhang
- Key Laboratory of Horticultural Plant Biology of the Ministry of Education, College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan, China
| | - Qiao-Song Yang
- Institute of Fruit Tree Research, Guangdong Academy of Agricultural Sciences/Key Laboratory of South Subtropical Fruit Biology and Genetic Resource Utilization (Ministry of Agriculture and Rural Affairs)/Guangdong Province Key Laboratory of Tropical and Subtropical Fruit Tree Research, Guangzhou, China
| | - Hui-Jun Gao
- Institute of Fruit Tree Research, Guangdong Academy of Agricultural Sciences/Key Laboratory of South Subtropical Fruit Biology and Genetic Resource Utilization (Ministry of Agriculture and Rural Affairs)/Guangdong Province Key Laboratory of Tropical and Subtropical Fruit Tree Research, Guangzhou, China
| | - Ou Sheng
- Institute of Fruit Tree Research, Guangdong Academy of Agricultural Sciences/Key Laboratory of South Subtropical Fruit Biology and Genetic Resource Utilization (Ministry of Agriculture and Rural Affairs)/Guangdong Province Key Laboratory of Tropical and Subtropical Fruit Tree Research, Guangzhou, China
| | - Fang-Cheng Bi
- Institute of Fruit Tree Research, Guangdong Academy of Agricultural Sciences/Key Laboratory of South Subtropical Fruit Biology and Genetic Resource Utilization (Ministry of Agriculture and Rural Affairs)/Guangdong Province Key Laboratory of Tropical and Subtropical Fruit Tree Research, Guangzhou, China
| | - Chun-Yu Li
- Institute of Fruit Tree Research, Guangdong Academy of Agricultural Sciences/Key Laboratory of South Subtropical Fruit Biology and Genetic Resource Utilization (Ministry of Agriculture and Rural Affairs)/Guangdong Province Key Laboratory of Tropical and Subtropical Fruit Tree Research, Guangzhou, China
| | - Tao Dong
- Institute of Fruit Tree Research, Guangdong Academy of Agricultural Sciences/Key Laboratory of South Subtropical Fruit Biology and Genetic Resource Utilization (Ministry of Agriculture and Rural Affairs)/Guangdong Province Key Laboratory of Tropical and Subtropical Fruit Tree Research, Guangzhou, China
| | - Gan-Jun Yi
- Institute of Fruit Tree Research, Guangdong Academy of Agricultural Sciences/Key Laboratory of South Subtropical Fruit Biology and Genetic Resource Utilization (Ministry of Agriculture and Rural Affairs)/Guangdong Province Key Laboratory of Tropical and Subtropical Fruit Tree Research, Guangzhou, China
| | - Wei-Di He
- Institute of Fruit Tree Research, Guangdong Academy of Agricultural Sciences/Key Laboratory of South Subtropical Fruit Biology and Genetic Resource Utilization (Ministry of Agriculture and Rural Affairs)/Guangdong Province Key Laboratory of Tropical and Subtropical Fruit Tree Research, Guangzhou, China
- *Correspondence: Wei-Di He,
| | - Chun-Hua Hu
- Institute of Fruit Tree Research, Guangdong Academy of Agricultural Sciences/Key Laboratory of South Subtropical Fruit Biology and Genetic Resource Utilization (Ministry of Agriculture and Rural Affairs)/Guangdong Province Key Laboratory of Tropical and Subtropical Fruit Tree Research, Guangzhou, China
- Chun-Hua Hu,
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Wang X, Wu Z, Bao W, Hu H, Chen M, Chai T, Wang H. Identification and evaluation of reference genes for quantitative real-time PCR analysis in Polygonum cuspidatum based on transcriptome data. BMC PLANT BIOLOGY 2019; 19:498. [PMID: 31726985 PMCID: PMC6854638 DOI: 10.1186/s12870-019-2108-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2019] [Accepted: 10/30/2019] [Indexed: 05/06/2023]
Abstract
BACKGROUND Polygonum cuspidatum of the Polygonaceae family is a traditional medicinal plant with many bioactive compounds that play important roles in human health and stress responses. Research has attempted to identify biosynthesis genes and metabolic pathways in this species, and quantitative real-time PCR (RT-qPCR) has commonly been used to detect gene expression because of its speed, sensitivity, and specificity. However, no P. cuspidatum reference genes have been identified, which hinders gene expression studies. Here, we aimed to identify suitable reference genes for accurate and reliable normalization of P. cuspidatum RT-qPCR data. RESULTS Twelve candidate reference genes, including nine common (ACT, TUA, TUB, GAPDH, EF-1γ, UBQ, UBC, 60SrRNA, and eIF6A) and three novel (SKD1, YLS8, and NDUFA13), were analyzed in different tissues (root, stem, and leaf) without treatment and in leaves under abiotic stresses (salt, ultraviolet [UV], cold, heat, and drought) and hormone stimuli (abscisic acid [ABA], ethylene [ETH], gibberellin [GA3], methyl jasmonate [MeJA], and salicylic acid [SA]). Expression stability in 65 samples was calculated using the △CT method, geNorm, NormFinder, BestKeeper, and RefFinder. Two reference genes (NDUFA13 and EF-1γ) were sufficient to normalize gene expression across all sample sets. They were also the two most stable genes for abiotic stresses and different tissues, whereas NDUFA13 and SKD1 were the top two choices for hormone stimuli. Considering individual experimental sets, GAPDH was the top-ranked gene under ABA, ETH, and GA3 treatments, while 60SrRNA showed good stability under MeJA and cold treatments. ACT, UBC, and TUB were suitable genes for drought, UV, and ABA treatments, respectively. TUA was not suitable because of its considerable variation in expression under different conditions. The expression patterns of PcPAL, PcSTS, and PcMYB4 under UV and SA treatments and in different tissues normalized by stable and unstable reference genes demonstrated the suitability of the optimal reference genes. CONCLUSIONS We propose NDUFA13 and EF-1γ as reference genes to normalize P. cuspidatum expression data. To our knowledge, this is the first systematic study of reference genes in P. cuspidatum which could help advance molecular biology research in P. cuspidatum and allied species.
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Affiliation(s)
- Xiaowei Wang
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Zhijun Wu
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Wenqi Bao
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Hongyan Hu
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Mo Chen
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Tuanyao Chai
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China.
- Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101, China.
| | - Hong Wang
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China.
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14
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Zhuang H, Lou Q, Liu H, Han H, Wang Q, Tang Z, Ma Y, Wang H. Differential Regulation of Anthocyanins in Green and Purple Turnips Revealed by Combined De Novo Transcriptome and Metabolome Analysis. Int J Mol Sci 2019; 20:E4387. [PMID: 31500111 PMCID: PMC6769466 DOI: 10.3390/ijms20184387] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2019] [Revised: 08/30/2019] [Accepted: 08/31/2019] [Indexed: 01/20/2023] Open
Abstract
Purple turnip Brassica rapa ssp. rapa is highly appreciated by consumers but the metabolites and molecular mechanisms underlying the root skin pigmentation remain open to study. Herein, we analyzed the anthocyanin composition in purple turnip (PT) and green turnip (GT) at five developmental stages. A total of 21 anthocyanins were detected and classified into the six major anthocynanin aglycones. Distinctly, PT contains 20 times higher levels of anthocyanins than GT, which explain the difference in the root skin pigmentation. We further sequenced the transcriptomes and analyzed the differentially expressed genes between the two turnips. We found that PT essentially diverts dihydroflavonols to the biosynthesis of anthocyanins over flavonols biosynthesis by strongly down-regulating one flavonol synthase gene, while strikingly up-regulating dihydroflavonol 4-reductase (DFR), anthocyanidin synthase and UDP-glucose: flavonoid-3-O-glucosyltransferase genes as compared to GT. Moreover, a nonsense mutation identified in the coding sequence of the DFR gene may lead to a nonfunctional protein, adding another hurdle to the accumulation of anthocyanin in GT. We also uncovered several key members of MYB, bHLH and WRKY families as the putative main drivers of transcriptional changes between the two turnips. Overall, this study provides new tools for modifying anthocyanin content and improving turnip nutritional quality.
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Affiliation(s)
- Hongmei Zhuang
- Institute of Horticultural Crops, Xinjiang Academy of Agricultural Sciences, Urumqi 830091, China.
| | - Qian Lou
- College of Horticulture, Northwest A & F University, Yangling 712100, China.
| | - Huifang Liu
- Institute of Horticultural Crops, Xinjiang Academy of Agricultural Sciences, Urumqi 830091, China.
| | - Hongwei Han
- Institute of Horticultural Crops, Xinjiang Academy of Agricultural Sciences, Urumqi 830091, China.
| | - Qiang Wang
- Institute of Horticultural Crops, Xinjiang Academy of Agricultural Sciences, Urumqi 830091, China.
| | - Zhonghua Tang
- Key Laboratory of Plant Ecology, Northeast Forestry University, Harbin 150040, China.
- Institute of Genetic Resources, Xinjiang Academy of Agricultural Science, Urumqi 830091, China.
| | - Yanming Ma
- Institute of Genetic Resources, Xinjiang Academy of Agricultural Science, Urumqi 830091, China.
| | - Hao Wang
- Institute of Horticultural Crops, Xinjiang Academy of Agricultural Sciences, Urumqi 830091, China.
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15
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Chen L, Hu B, Qin Y, Hu G, Zhao J. Advance of the negative regulation of anthocyanin biosynthesis by MYB transcription factors. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2019; 136:178-187. [PMID: 30685697 DOI: 10.1016/j.plaphy.2019.01.024] [Citation(s) in RCA: 128] [Impact Index Per Article: 25.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2018] [Revised: 01/08/2019] [Accepted: 01/19/2019] [Indexed: 05/21/2023]
Abstract
Anthocyanins are secondary metabolites derived from the specific branch of the flavonoid pathway, responsible for red, purple and blue coloration display in the flowers and fruits. The functions of anthocyanins are diverse, including acting as visual signals to pollinators, defense against biotic and abiotic stresses. Thus, anthocyanins have been the most intensely studied secondary metabolite pathway. From model plants to horticultural crops, numerous studies have resulted in the discovery of highly conserved MYB-bHLH-WDR (MBW) transcriptional complex for the regulation of anthocyanin biosynthesis in plants. Recent discoveries have revealed that the anthocyanin biosynthesis pathway is also controlled by MYB repressors. Here we focus on the research progress into the role of MYB repressors in anthocyanin biosynthesis. In particular, we will discuss their functions and relationship to the MBW complex in the control of anthocyanin accumulation. In addition, an integrated regulatory network of anthocyanin biosynthesis controlled by MYB repressors and MBW activation complex is built based on the significant progress.
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Affiliation(s)
- Linhuan Chen
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources/Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (South China) of Ministry of Agriculture, College of Horticulture, South China Agricultural University, Guangzhou, China
| | - Bing Hu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources/Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (South China) of Ministry of Agriculture, College of Horticulture, South China Agricultural University, Guangzhou, China
| | - Yonghua Qin
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources/Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (South China) of Ministry of Agriculture, College of Horticulture, South China Agricultural University, Guangzhou, China
| | - Guibing Hu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources/Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (South China) of Ministry of Agriculture, College of Horticulture, South China Agricultural University, Guangzhou, China
| | - Jietang Zhao
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources/Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (South China) of Ministry of Agriculture, College of Horticulture, South China Agricultural University, Guangzhou, China.
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16
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Chen S, Wu F, Li Y, Qian Y, Pan X, Li F, Wang Y, Wu Z, Fu C, Lin H, Yang A. NtMYB4 and NtCHS1 Are Critical Factors in the Regulation of Flavonoid Biosynthesis and Are Involved in Salinity Responsiveness. FRONTIERS IN PLANT SCIENCE 2019; 10:178. [PMID: 30846995 PMCID: PMC6393349 DOI: 10.3389/fpls.2019.00178] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Accepted: 02/05/2019] [Indexed: 05/19/2023]
Abstract
High levels of salinity induce serious oxidative damage in plants. Flavonoids, as antioxidants, have important roles in reactive oxygen species (ROS) scavenging. In the present study, the tobacco R2R3 MYB type repressor, NtMYB4, was isolated and characterized. The expression of NtMYB4 was suppressed by salinity. Overexpression of NtMYB4 reduced the salt tolerance in transgenic tobacco plants. NtMYB4 repressed the promoter activity of NtCHS1 and negatively regulated its expression. Rutin accumulation was significantly decreased in NtMYB4 overexpressing transgenic plants and NtCHS1 RNAi silenced transgenic plants. Moreover, high H2O2 andO 2 - contents were detected in both types of rutin-reduced transgenic plants under high salt stress. In addition, exogenous rutin supplementation effectively scavenged ROS (H2O2 andO 2 - ) and improved the salt tolerance of the rutin-reduced transgenic plants. In contrast, NtCHS1 overexpressing plants had increased rutin accumulation, lower H2O2 andO 2 - contents, and higher tolerance to salinity. These results suggested that tobacco NtMYB4 acts as a salinity response repressor and negatively regulates NtCHS1 expression, which results in the reduced flavonoid accumulation and weakened ROS-scavenging ability under salt stress.
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Affiliation(s)
- Shuai Chen
- Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao, China
| | - Fengyan Wu
- Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao, China
| | - Yiting Li
- Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao, China
| | - Yanli Qian
- Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao, China
| | - Xuhao Pan
- Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao, China
| | - Fengxia Li
- Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao, China
| | - Yuanying Wang
- Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao, China
| | - Zhenying Wu
- Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, China
| | - Chunxiang Fu
- Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, China
| | - Hao Lin
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Aiguo Yang
- Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao, China
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17
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Liu L, Li Y, She G, Zhang X, Jordan B, Chen Q, Zhao J, Wan X. Metabolite profiling and transcriptomic analyses reveal an essential role of UVR8-mediated signal transduction pathway in regulating flavonoid biosynthesis in tea plants (Camellia sinensis) in response to shading. BMC PLANT BIOLOGY 2018; 18:233. [PMID: 30314466 PMCID: PMC6186127 DOI: 10.1186/s12870-018-1440-0] [Citation(s) in RCA: 60] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2018] [Accepted: 09/24/2018] [Indexed: 05/18/2023]
Abstract
BACKGROUND Tea is the most popular nonalcoholic beverage worldwide for its pleasant characteristics and healthful properties. Catechins, theanine and caffeine are the major natural products in tea buds and leaves that determine tea qualities such as infusion colors, tastes and fragrances, as well as their health benefits. Shading is a traditional and effective practice to modify natural product accumulation and to enhance the tea quality in tea plantation. However, the mechanism underlying the shading effects is not fully understood. This study aims to explore the regulation of flavonoid biosynthesis in Camellia sinensis under shading by using both metabolomic and transcriptional analyses. RESULTS While shading enhanced chlorophyll accumulation, major catechins, including C, EC, GC and EGC, decreased significantly in tea buds throughout the whole shading period. The reduction of catechins and flavonols were consistent with the simultaneous down-regulation of biosynthetic genes and TFs associated with flavonoid biosynthesis. Of 16 genes involved in the flavonoid biosynthetic pathway, F3'H and FLS significantly decreased throughout shading while the others (PAL, CHSs, DFR, ANS, ANR and LAR, etc.) temporally decreased in early or late shading stages. Gene co-expression cluster analysis suggested that a number of photoreceptors and potential genes involved in UV-B signal transductions (UVR8_L, HY5, COP1 and RUP1/2) showed decreasing expression patterns consistent with structural genes (F3'H, FLS, ANS, ANR, LAR, DFR and CHSs) and potential TFs (MYB4, MYB12, MYB14 and MYB111) involved in flavonoid biosynthesis, when compared with genes in the UV-A/blue and red/far-red light signal transductions. The KEGG enrichment and matrix correlation analyses also attributed the regulation of catechin biosynthesis to the UVR8-mediated signal transduction pathway. Further UV-B treatment in the controlled environment confirmed UV-B induction on flavonols and EGCG accumulation in tea leaves. CONCLUSIONS We proposed that catechin biosynthesis in C. sinensis leaves is predominantly regulated by UV through the UVR8-mediated signal transduction pathway to MYB12/MYB4 downstream effectors, to modulate flavonoid accumulation. Our study provides new insights into our understanding of regulatory mechanisms for shading-enhanced tea quality.
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Affiliation(s)
- Linlin Liu
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei, 230036 Anhui China
| | - Yingying Li
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei, 230036 Anhui China
| | - Guangbiao She
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei, 230036 Anhui China
| | - Xianchen Zhang
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei, 230036 Anhui China
| | - Brian Jordan
- Centre for Viticulture and Oenology, Faculty of Agriculture and Life Sciences, Lincoln University, Christchurch, 7647 New Zealand
| | - Qi Chen
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei, 230036 Anhui China
| | - Jian Zhao
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei, 230036 Anhui China
| | - Xiaochun Wan
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei, 230036 Anhui China
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Zhang K, Logacheva MD, Meng Y, Hu J, Wan D, Li L, Janovská D, Wang Z, Georgiev MI, Yu Z, Yang F, Yan M, Zhou M. Jasmonate-responsive MYB factors spatially repress rutin biosynthesis in Fagopyrum tataricum. JOURNAL OF EXPERIMENTAL BOTANY 2018; 69:1955-1966. [PMID: 29394372 PMCID: PMC6018783 DOI: 10.1093/jxb/ery032] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2017] [Accepted: 01/16/2018] [Indexed: 05/17/2023]
Abstract
Jasmonates are plant hormones that induce the accumulation of many secondary metabolites, such as rutin in buckwheat, via regulation of jasmonate-responsive transcription factors. Here, we report on the identification of a clade of jasmonate-responsive subgroup 4 MYB transcription factors, FtMYB13, FtMYB14, FtMYB15, and FtMYB16, which directly repress rutin biosynthesis in Fagopyrum tataricum. Immunoblot analysis showed that FtMYB13, FtMYB14, and FtMYB15 could be degraded via the 26S proteasome in the COI1-dependent jasmonate signaling pathway, and that this degradation is due to the SID motif in their C-terminus. Yeast two-hybrid and bimolecular fluorescence complementation assays revealed that FtMYB13, FtMYB14, and FtMYB15 interact with the importin protein Sensitive to ABA and Drought 2 (FtSAD2) in stem and inflorescence. Furthermore, the key repressor of jasmonate signaling FtJAZ1 specifically interacts with FtMYB13. Point mutation analysis showed that the conserved Asp residue of the SID domain contributes to mediating protein-protein interaction. Protoplast transient activation assays demonstrated that FtMYB13, FtMYB14, and FtMYB15 directly repress phenylalanine ammonia lyase (FtPAL) gene expression, and FtSAD2 and FtJAZ1 significantly promote the repressing activity of FtMYBs. These findings may ultimately be promising for further engineering of plant secondary metabolism.
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Affiliation(s)
- Kaixuan Zhang
- Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Maria D Logacheva
- Department of Evolutionary Biochemistry, AN Belozersky Institute of Physico-Chemical Biology, MV Lomonosov Moscow State University, Moscow, Russia
| | - Yu Meng
- College of Landscape and Travel, Agricultural University of Hebei, Baoding, China
| | - Jianping Hu
- College of Agricultural Science, Xichang University, Xichang, Sichuan, China
| | - Dongpu Wan
- Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing, China
- College of Agriculture, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia, China
| | - Long Li
- Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing, China
- School of Life Sciences, Hunan University of Science and Technology, Xiangtan, Hunan, China
| | - Dagmar Janovská
- Department of Gene Bank, Crop Research Institute, Drnovská, Czech Republic
| | - Zhiyong Wang
- College of Agriculture, Hainan University, Haikou, Hainan, China
| | - Milen I Georgiev
- Group of Plant Cell Biotechnology and Metabolomics, The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, Plovdiv, Bulgaria
- Center of Plant Systems Biology and Biotechnology, Plovdiv, Bulgaria
| | - Zhuo Yu
- College of Agriculture, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia, China
| | - Fuyu Yang
- Grassland Institute, China Agricultural University, Beijing, China
| | - Mingli Yan
- School of Life Sciences, Hunan University of Science and Technology, Xiangtan, Hunan, China
| | - Meiliang Zhou
- Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing, China
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Li J, Ren L, Gao Z, Jiang M, Liu Y, Zhou L, He Y, Chen H. Combined transcriptomic and proteomic analysis constructs a new model for light-induced anthocyanin biosynthesis in eggplant (Solanum melongena L.). PLANT, CELL & ENVIRONMENT 2017; 40:3069-3087. [PMID: 28940206 DOI: 10.1111/pce.13074] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2017] [Revised: 09/04/2017] [Accepted: 09/05/2017] [Indexed: 05/20/2023]
Abstract
Light is a key environmental factor affecting anthocyanin biosynthesis. Our previous study demonstrated that "Lanshan Hexian" is a light-sensitive eggplant cultivar, but its regulatory mechanism is unknown. Here, delphinidin-3-[4-(cis-p-coumaroyl)-rhamnosyl-glucopyranoside]-5-glucopyranoside and delphinidin-3-[4-(trans-p-coumaroyl)-rhamnosyl-glucopyranoside]-5-glucopyranoside were identified as the main anthocyanin components in Lanshan Hexian by ultra-performance liquid chromatography-tandem mass spectrometry. Three time points of anthocyanin accumulation, including the start point (0 day), fastest point (5 days), and highest point (12 day), were investigated by using ribonucleic acid sequencing and iTRAQ technology. The corresponding correlation coefficients of differentially expressed genes, and differentially expressed proteins were 0.6936, 0.2332, and 0.6672. Anthocyanin biosynthesis was a significantly enriched pathway, and CHI, F3H, 3GT, 5GT, and HY5 were regulated at both transcriptional and translational levels. Moreover, some transcription factors and photoreceptors may participate in light-induced anthocyanin biosynthesis like the known transcription factors MYB113 and TT8. The transient expression assay indicated that SmMYB35, SmMYB44, and a SmMYB86 isoform might involve in the light-induced anthocyanin biosynthesis pathway. Finally, a regulatory model for light-induced anthocyanin biosynthesis in eggplant was constructed. Our work provides a new direction for the study of the molecular mechanisms of light-induced anthocyanin biosynthesis in eggplant.
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Affiliation(s)
- Jing Li
- School of Agriculture and Biology, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, Shanghai, 200240, China
| | - Li Ren
- School of Agriculture and Biology, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, Shanghai, 200240, China
- Institute for Agri-Food Standards and Testing Technology, Shanghai Academy of Agricultural Sciences, 1000 Jinqi Road, Fengxian District, Shanghai, 201403, China
| | - Zhen Gao
- School of Agriculture and Biology, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, Shanghai, 200240, China
| | - Mingmin Jiang
- School of Agriculture and Biology, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, Shanghai, 200240, China
| | - Yang Liu
- School of Agriculture and Biology, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, Shanghai, 200240, China
| | - Lu Zhou
- School of Agriculture and Biology, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, Shanghai, 200240, China
| | - Yongjun He
- School of Agriculture and Biology, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, Shanghai, 200240, China
| | - Huoying Chen
- School of Agriculture and Biology, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, Shanghai, 200240, China
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Zhou M, Sun Z, Ding M, Logacheva MD, Kreft I, Wang D, Yan M, Shao J, Tang Y, Wu Y, Zhu X. FtSAD2 and FtJAZ1 regulate activity of the FtMYB11 transcription repressor of the phenylpropanoid pathway in Fagopyrum tataricum. THE NEW PHYTOLOGIST 2017; 216:814-828. [PMID: 28722263 DOI: 10.1111/nph.14692] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2017] [Accepted: 06/06/2017] [Indexed: 05/21/2023]
Abstract
Little is known about the molecular mechanism of the R2R3-MYB transcriptional repressors involved in plant phenylpropanoid metabolism. Here, we describe one R2R3-type MYB repressor, FtMYB11 from Fagopyrum tataricum. It contains the SID-like motif GGDFNFDL and it is regulated by both the importin protein 'Sensitive to ABA and Drought 2' (SAD2) and the jasmonates signalling cascade repressor JAZ protein. Yeast two hybrid and bimolecular fluorescence complementation assays demonstrated that FtMYB11 interacts with SAD2 and FtJAZ1. Protoplast transactivation assays demonstrated that FtMYB11 acts synergistically with FtSAD2 or FtJAZ1 and directly represses its target genes via the MYB-core element AATAGTT. Changing the Asp122 residue to Asn in the SID-like motif results in cytoplasmic localization of FtMYB11 because of loss of interaction with SAD2, while changing the Asp126 residue to Asn results in the loss of interaction with FtJAZ1. Overexpression of FtMYB11or FtMYB11D126N in F. tataricum hairy roots resulted in reduced accumulation of rutin, while overexpression of FtMYB11D122N in hairy roots did not lead to such a change. The results indicate that FtMYB11 acts as a regulator via interacting with FtSAD2 or FtJAZ1 to repress phenylpropanoid biosynthesis, and this repression depends on two conserved Asp residues of its SID-like motif.
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Affiliation(s)
- Meiliang Zhou
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
- College of Environmental Sciences, Sichuan Agricultural University, Chengdu, 611130, Sichuan, China
| | - Zhanmin Sun
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
| | - Mengqi Ding
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
| | - Maria D Logacheva
- Department of Evolutionary Biochemistry, AN Belozersky Institute of Physico-Chemical Biology, MV Lomonosov, Moscow State University, Moscow, Russia
| | - Ivan Kreft
- Nutrition Institute, Tržaška 40, SI-1000, Ljubljana, Slovenia
| | - Dan Wang
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
| | - Mingli Yan
- School of Life Sciences, Hunan University of Science and Technology, Xiangtan, 411201, Hunan, China
| | - Jirong Shao
- College of Life Sciences, Sichuan Agricultural University, Yaan, 625014, Sichuan, China
| | - Yixiong Tang
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
| | - Yanmin Wu
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
| | - Xuemei Zhu
- College of Environmental Sciences, Sichuan Agricultural University, Chengdu, 611130, Sichuan, China
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21
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Yang JF, Chen YZ, Kawabata S, Li YH, Wang Y. Identification of Light-Independent Anthocyanin Biosynthesis Mutants Induced by Ethyl Methane Sulfonate in Turnip "Tsuda" (Brassica rapa). Int J Mol Sci 2017. [PMID: 28640193 PMCID: PMC5535824 DOI: 10.3390/ijms18071288] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
The epidermis of swollen storage roots in purple cultivars of turnip “Tsuda” (Brassica rapa) accumulates anthocyanin in a light-dependent manner, especially in response to UV-A light, of which the mechanism is unclear. In this study, we mutagenized 15,000 seeds by 0.5% (v/v) ethyl methane sulfonate (EMS) and obtained 14 mutants with abnormal anthocyanin production in their epidermis of swollen storage roots. These mutants were classified into two groups: the red mutants with constitutive anthocyanin accumulation in their epidermis of storage roots even in underground parts in darkness and the white mutants without anthocyanin accumulation in the epidermis of storage roots in aboveground parts exposed to sunlight. Test cross analysis demonstrated that w9, w68, w204, r15, r21, r30 and r57 contained different mutations responsible for their phenotypic variations. Further genetic analysis of four target mutants (w9, w68, w204 and r15) indicated that each of them was controlled by a different recessive gene. Intriguingly, the expression profiles of anthocyanin biosynthesis genes, including structural and regulatory genes, coincided with their anthocyanin levels in the epidermis of storage roots in the four target mutants. We proposed that potential genes responsible for the mutations should be upstream factors of the anthocyanin biosynthesis pathway in turnips, which provided resources to further investigate the mechanisms of light-induced anthocyanin accumulation.
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Affiliation(s)
- Jian-Fei Yang
- College of Life Science, Northeast Forestry University, Harbin 150040, China.
| | - Yun-Zhu Chen
- College of Life Science, Northeast Forestry University, Harbin 150040, China.
| | - Saneyuki Kawabata
- Graduate School of Agricultural and Life Sciences, The University of Tokyo, Yayoi, Bunkyo Tokyo 113-8654, Japan.
| | - Yu-Hua Li
- College of Life Science, Northeast Forestry University, Harbin 150040, China.
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin 150040, China.
| | - Yu Wang
- College of Life Science, Northeast Forestry University, Harbin 150040, China.
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin 150040, China.
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22
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Zhou M, Memelink J. Jasmonate-responsive transcription factors regulating plant secondary metabolism. Biotechnol Adv 2016; 34:441-449. [PMID: 26876016 DOI: 10.1016/j.biotechadv.2016.02.004] [Citation(s) in RCA: 214] [Impact Index Per Article: 26.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2015] [Revised: 02/04/2016] [Accepted: 02/08/2016] [Indexed: 01/24/2023]
Abstract
Plants produce a large variety of secondary metabolites including alkaloids, glucosinolates, terpenoids and phenylpropanoids. These compounds play key roles in plant-environment interactions and many of them have pharmacological activity in humans. Jasmonates (JAs) are plant hormones which induce biosynthesis of many secondary metabolites. JAs-responsive transcription factors (TFs) that regulate the JAs-induced accumulation of secondary metabolites belong to different families including AP2/ERF, bHLH, MYB and WRKY. Here, we give an overview of the types and functions of TFs that have been identified in JAs-induced secondary metabolite biosynthesis, and highlight their similarities and differences in regulating various biosynthetic pathways. We review major recent developments regarding JAs-responsive TFs mediating secondary metabolite biosynthesis, and provide suggestions for further studies.
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Affiliation(s)
- Meiliang Zhou
- Institute of Biology, Leiden University, Sylvius Laboratory, P.O. Box 9505, 2300 RA, Leiden, The Netherlands; Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
| | - Johan Memelink
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
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23
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Zhou M, Sun Z, Wang C, Zhang X, Tang Y, Zhu X, Shao J, Wu Y. Changing a conserved amino acid in R2R3-MYB transcription repressors results in cytoplasmic accumulation and abolishes their repressive activity in Arabidopsis. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2015; 84:395-403. [PMID: 26332741 DOI: 10.1111/tpj.13008] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2015] [Revised: 08/16/2015] [Accepted: 08/20/2015] [Indexed: 05/11/2023]
Abstract
Sub-group 4 R2R3-type MYB transcription factors, including MYB3, MYB4, MYB7 and MYB32, act as repressors in phenylpropanoid metabolism. These proteins contain the conserved MYB domain and the ethylene-responsive element binding factor-associated amphiphilic repression (EAR) repression domain. Additionally, MYB4, MYB7 and MYB32 possess a putative zinc-finger domain and a conserved GY/FDFLGL motif in their C-termini. The protein 'sensitive to ABA and drought 2' (SAD2) recognizes the nuclear pore complex, which then transports the SAD2-MYB4 complex into the nucleus. Here, we show that the conserved GY/FDFLGL motif contributes to the interaction between MYB factors and SAD2. The Asp → Asn mutation in the GY/FDFLGL motif abolishes the interaction between MYB transcription factors and SAD2, and therefore they cannot be transported into the nucleus and cannot repress their target genes. We found that MYB4(D261N) loses the capacity to repress expression of the cinnamate 4-hydroxylase (C4H) gene and biosynthesis of sinapoyl malate. Our results indicate conservation among MYB transcription factors in terms of their interaction with SAD2. Therefore, the Asp → Asn mutation may be used to engineer transcription factors.
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Affiliation(s)
- Meiliang Zhou
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
| | - Zhanmin Sun
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
| | - Chenglong Wang
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
- School of Life Science, Sichuan Agricultural University, Yaan, 625014, Sichuan, China
| | - Xinquan Zhang
- Grassland Science Department, Sichuan Agriculture University, Chengdu, 611130, Sichuan, China
| | - Yixiong Tang
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
| | - Xuemei Zhu
- School of Resources and Environment, Sichuan Agricultural University, Chengdu, 611130, Sichuan, China
| | - Jirong Shao
- School of Life Science, Sichuan Agricultural University, Yaan, 625014, Sichuan, China
| | - Yanmin Wu
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
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24
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Laursen T, Møller BL, Bassard JE. Plasticity of specialized metabolism as mediated by dynamic metabolons. TRENDS IN PLANT SCIENCE 2015; 20:20-32. [PMID: 25435320 DOI: 10.1016/j.tplants.2014.11.002] [Citation(s) in RCA: 72] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2014] [Revised: 10/24/2014] [Accepted: 11/07/2014] [Indexed: 05/02/2023]
Abstract
The formation of specialized metabolites enables plants to respond to biotic and abiotic stresses, but requires the sequential action of multiple enzymes. To facilitate swift production and to avoid leakage of potentially toxic and labile intermediates, many of the biosynthetic pathways are thought to organize in multienzyme clusters termed metabolons. Dynamic assembly and disassembly enable the plant to rapidly switch the product profile and thereby prioritize its resources. The lifetime of metabolons is largely unknown mainly due to technological limitations. This review focuses on the factors that facilitate and stimulate the dynamic assembly of metabolons, including microenvironments, noncatalytic proteins, and allosteric regulation. Understanding how plants organize carbon fluxes within their metabolic grids would enable targeted bioengineering of high-value specialized metabolites.
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Affiliation(s)
- Tomas Laursen
- VILLUM Research Center for Plant Plasticity, Center for Synthetic Biology 'bioSYNergy', and Plant Biochemistry Laboratory, Department of Plant and Environmental Sciences, University of Copenhagen, 40 Thorvaldsensvej, DK-1871 Frederiksberg C, Copenhagen, Denmark
| | - Birger Lindberg Møller
- VILLUM Research Center for Plant Plasticity, Center for Synthetic Biology 'bioSYNergy', and Plant Biochemistry Laboratory, Department of Plant and Environmental Sciences, University of Copenhagen, 40 Thorvaldsensvej, DK-1871 Frederiksberg C, Copenhagen, Denmark; Carlsberg Laboratory, 10 Gamle Carlsberg Vej, DK-1799 Copenhagen V, Denmark.
| | - Jean-Etienne Bassard
- VILLUM Research Center for Plant Plasticity, Center for Synthetic Biology 'bioSYNergy', and Plant Biochemistry Laboratory, Department of Plant and Environmental Sciences, University of Copenhagen, 40 Thorvaldsensvej, DK-1871 Frederiksberg C, Copenhagen, Denmark
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