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Yang Q, Li Z, Ma Y, Fang L, Liu Y, Zhu X, Dong H, Wang S. Metabolite analysis reveals flavonoids accumulation during flower development in Rhododendron pulchrum sweet (Ericaceae). PeerJ 2024; 12:e17325. [PMID: 38832044 PMCID: PMC11146334 DOI: 10.7717/peerj.17325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Accepted: 04/10/2024] [Indexed: 06/05/2024] Open
Abstract
The azalea (Rhododendron simsii Planch.) is an important ornamental woody plant with various medicinal properties due to its phytochemical compositions and components. However little information on the metabolite variation during flower development in Rhododendron has been provided. In our study, a comparative analysis of the flavonoid profile was performed in Rhododendron pulchrum sweet at three stages of flower development, bud (stage 1), partially open flower (stage 2), and full bloom (stage 3). A total of 199 flavonoids, including flavone, flavonol, flavone C-glycosides, flavanone, anthocyanin, and isoflavone were identified. In hierarchical clustering analysis (HCA) and principal component analysis (PCA), the accumulation of flavonoids displayed a clear development stage variation. During flower development, 78 differential accumulated metabolites (DAMs) were identified, and most were enriched to higher levels at the full bloom stage. A total of 11 DAMs including flavone (chrysin, chrysoeriol O-glucuronic acid, and chrysoeriol O-hexosyl-O-pentoside), isoflavone (biochanin A), and flavonol (3,7-di-O-methyl quercetin and isorhamnetin) were significantly altered at three stages. In particular, 3,7-di-O-methyl quercetin was the top increased metabolite during flower development. Furthermore, integrative analyses of metabolomic and transcriptomic were conducted, revealing that the contents of isoflavone, biochanin A, glycitin, and prunetin were correlated with the expression of 2-hydroxyisoflavanone dehydratase (HIDH), which provide insight into the regulatory mechanism that controls isoflavone biosynthesis in R. pulchrum. This study will provide a new reference for increasing desired metabolites effectively by more accurate or appropriate genetic engineering strategies.
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Affiliation(s)
- Qiaofeng Yang
- Forestry and Fruit Tree Research Institute, Wuhan Academy of Agricultural Sciences, Wuhan, Hubei, China
- College of Food and Bioengineering, Henan University of Animal Husbandry and Economy, Zhengzhou, Henan, China
| | - Zhiliang Li
- Huanggang Normal University, Huanggang, China
| | - Yuting Ma
- Huanggang Normal University, Huanggang, China
| | - Linchuan Fang
- Forestry and Fruit Tree Research Institute, Wuhan Academy of Agricultural Sciences, Wuhan, Hubei, China
| | - Yan Liu
- Huanggang Normal University, Huanggang, China
| | - Xinyu Zhu
- Huanggang Normal University, Huanggang, China
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Zuo D, Yan Y, Ma J, Zhao P. Genome-Wide Analysis of Transcription Factor R2R3-MYB Gene Family and Gene Expression Profiles during Anthocyanin Synthesis in Common Walnut ( Juglans regia L.). Genes (Basel) 2024; 15:587. [PMID: 38790216 PMCID: PMC11121633 DOI: 10.3390/genes15050587] [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: 03/21/2024] [Revised: 04/30/2024] [Accepted: 05/02/2024] [Indexed: 05/26/2024] Open
Abstract
The R2R3-MYB gene family, encoding plant transcriptional regulators, participates in many metabolic pathways of plant physiology and development, including flavonoid metabolism and anthocyanin synthesis. This study proceeded as follows: the JrR2R3-MYB gene family was analyzed genome-wide, and the family members were identified and characterized using the high-quality walnut reference genome "Chandler 2.0". All 204 JrR2R3-MYBs were established and categorized into 30 subgroups via phylogenetic analysis. JrR2R3-MYBs were unevenly distributed over 16 chromosomes. Most JrR2R3-MYBs had similar structures and conservative motifs. The cis-acting elements exhibit multiple functions of JrR2R3-MYBs such as light response, metabolite response, and stress response. We found that the expansion of JrR2R3-MYBs was mainly caused by WGD or segmental duplication events. Ka/Ks analysis indicated that these genes were in a state of negative purifying selection. Transcriptome results suggested that JrR2R3-MYBs were widely entangled in the process of walnut organ development and differentially expressed in different colored varieties of walnuts. Subsequently, we identified 17 differentially expressed JrR2R3-MYBs, 9 of which may regulate anthocyanin biosynthesis based on the results of a phylogenetic analysis. These genes were present in greater expression levels in 'Zijing' leaves than in 'Lvling' leaves, as revealed by the results of qRT-PCR experiments. These results contributed to the elucidation of the functions of JrR2R3-MYBs in walnut coloration. Collectively, this work provides a foundation for exploring the functional characteristics of the JrR2R3-MYBs in walnuts and improving the nutritional value and appearance quality of walnuts.
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Affiliation(s)
| | | | | | - Peng Zhao
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, College of Life Sciences, Northwest University, Xi’an 710069, China; (D.Z.); (Y.Y.); (J.M.)
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Du Y, Ma H, Liu Y, Gong R, Lan Y, Zhao J, Liu G, Lu Y, Wang S, Jia H, Li N, Zhang R, Wang J, Sun G. Major quality regulation network of flavonoid synthesis governing the bioactivity of black wolfberry. THE NEW PHYTOLOGIST 2024; 242:558-575. [PMID: 38396374 DOI: 10.1111/nph.19602] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Accepted: 01/26/2024] [Indexed: 02/25/2024]
Abstract
Black wolfberry (Lycium ruthenicum Murr.) contains various bioactive metabolites represented by flavonoids, which are quite different among production regions. However, the underlying regulation mechanism of flavonoid biosynthesis governing the bioactivity of black wolfberry remains unclear. Presently, we compared the bioactivity of black wolfberry from five production regions. Multi-omics were performed to construct the regulation network associated with the fruit bioactivity. The detailed regulation mechanisms were identified using genetic and molecular methods. Typically, Qinghai (QH) fruit exhibited higher antioxidant and anti-inflammatory activities. The higher medicinal activity of QH fruit was closely associated with the accumulation of eight flavonoids, especially Kaempferol-3-O-rutinoside (K3R) and Quercetin-3-O-rutinoside (rutin). Flavonoid biosynthesis was found to be more active in QH fruit, and the upregulation of LrFLS, LrCHS, LrF3H and LrCYP75B1 caused the accumulation of K3R and rutin, leading to high medicinal bioactivities of black wolfberry. Importantly, transcription factor LrMYB94 was found to regulate LrFLS, LrCHS and LrF3H, while LrWRKY32 directly triggered LrCYP75B1 expression. Moreover, LrMYB94 interacted with LrWRKY32 to promote LrWRKY32-regulated LrCYP75B1 expression and rutin synthesis in black wolfberry. Transgenic black wolfberry overexpressing LrMYB94/LrWRKY32 contained higher levels of K3R and rutin, and exhibited high medicinal bioactivities. Importantly, the LrMYB94/LrWRKY32-regulated flavonoid biosynthesis was light-responsive, showing the importance of light intensity for the medicinal quality of black wolfberry. Overall, our results elucidated the regulation mechanisms of K3R and rutin synthesis, providing the basis for the genetic breeding of high-quality black wolfberry.
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Affiliation(s)
- Youwei Du
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of Plant Protection, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Huiya Ma
- College of Chemistry and Pharmacy, Northwest A&F University, Yangling, Shaanxi, 712100, China
- Department of Basic Medicine, Qinghai University, Xining, Qinghai, 810016, China
| | - Yuanyuan Liu
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of Plant Protection, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Rui Gong
- College of Chemistry and Pharmacy, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Yu Lan
- College of Chemistry and Pharmacy, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Jianhua Zhao
- National Wolfberry Engineering Center, Ningxia Academy of Agriculture and Forestry Sciences, Yinchuan, 750002, China
| | - Guangli Liu
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of Plant Protection, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Yiming Lu
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of Plant Protection, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Shuanghong Wang
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of Plant Protection, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Hongchen Jia
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of Plant Protection, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Na Li
- Instrumental Analysis Center, Xi'an Jiaotong University, Xi'an, Shaanxi, 710000, China
| | - Rong Zhang
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of Plant Protection, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Junru Wang
- College of Chemistry and Pharmacy, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Guangyu Sun
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of Plant Protection, Northwest A&F University, Yangling, Shaanxi, 712100, China
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Cao Y, Mei Y, Zhang R, Zhong Z, Yang X, Xu C, Chen K, Li X. Transcriptional regulation of flavonol biosynthesis in plants. HORTICULTURE RESEARCH 2024; 11:uhae043. [PMID: 38623072 PMCID: PMC11017525 DOI: 10.1093/hr/uhae043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/26/2023] [Accepted: 02/02/2024] [Indexed: 04/17/2024]
Abstract
Flavonols are a class of flavonoids that play a crucial role in regulating plant growth and promoting stress resistance. They are also important dietary components in horticultural crops due to their benefits for human health. In past decades, research on the transcriptional regulation of flavonol biosynthesis in plants has increased rapidly. This review summarizes recent progress in flavonol-specific transcriptional regulation in plants, encompassing characterization of different categories of transcription factors (TFs) and microRNAs as well as elucidation of different transcriptional mechanisms, including direct and cascade transcriptional regulation. Direct transcriptional regulation involves TFs, such as MYB, AP2/ERF, and WRKY, which can directly target the key flavonol synthase gene or other early genes in flavonoid biosynthesis. In addition, different regulation modules in cascade transcriptional regulation involve microRNAs targeting TFs, regulation between activators, interaction between activators and repressors, and degradation of activators or repressors induced by UV-B light or plant hormones. Such sophisticated regulation of the flavonol biosynthetic pathway in response to UV-B radiation or hormones may allow plants to fine-tune flavonol homeostasis, thereby balancing plant growth and stress responses in a timely manner. Based on orchestrated regulation, molecular design strategies will be applied to breed horticultural crops with excellent health-promoting effects and high resistance.
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Affiliation(s)
- Yunlin Cao
- Zhejiang Provincial Key Laboratory of Horticultural Crop Quality Manipulation, Zhejiang University, Hangzhou, 310058, China
- Center for Drug Safety Evaluation and Research, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, 310058, China
- Shandong (Linyi) Institute of Modern Agriculture, Zhejiang University, Linyi, 276000, China
| | - Yuyang Mei
- Zhejiang Provincial Key Laboratory of Horticultural Crop Quality Manipulation, Zhejiang University, Hangzhou, 310058, China
| | - Ruining Zhang
- Zhejiang Provincial Key Laboratory of Horticultural Crop Quality Manipulation, Zhejiang University, Hangzhou, 310058, China
| | - Zelong Zhong
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
| | - Xiaochun Yang
- Center for Drug Safety Evaluation and Research, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, 310058, China
- Shandong (Linyi) Institute of Modern Agriculture, Zhejiang University, Linyi, 276000, China
| | - Changjie Xu
- Zhejiang Provincial Key Laboratory of Horticultural Crop Quality Manipulation, Zhejiang University, Hangzhou, 310058, China
| | - Kunsong Chen
- Zhejiang Provincial Key Laboratory of Horticultural Crop Quality Manipulation, Zhejiang University, Hangzhou, 310058, China
| | - Xian Li
- Zhejiang Provincial Key Laboratory of Horticultural Crop Quality Manipulation, Zhejiang University, Hangzhou, 310058, China
- Shandong (Linyi) Institute of Modern Agriculture, Zhejiang University, Linyi, 276000, China
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Wang H, Han T, Bai A, Xu H, Wang J, Hou X, Li Y. Potential Regulatory Networks and Heterosis for Flavonoid and Terpenoid Contents in Pak Choi: Metabolomic and Transcriptome Analyses. Int J Mol Sci 2024; 25:3587. [PMID: 38612398 PMCID: PMC11011442 DOI: 10.3390/ijms25073587] [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: 01/31/2024] [Revised: 03/13/2024] [Accepted: 03/18/2024] [Indexed: 04/14/2024] Open
Abstract
Pak choi exhibits a diverse color range and serves as a rich source of flavonoids and terpenoids. However, the mechanisms underlying the heterosis and coordinated regulation of these compounds-particularly isorhamnetin-remain unclear. This study involved three hybrid combinations and the detection of 528 metabolites from all combinations, including 26 flavonoids and 88 terpenoids, through untargeted metabolomics. Analysis of differential metabolites indicated that the heterosis for the flavonoid and terpenoid contents was parent-dependent, and positive heterosis was observed for isorhamnetin in the two hybrid combinations (SZQ, 002 and HMG, ZMG). Moreover, there was a high transcription level of flavone 3'-O-methyltransferase, which is involved in isorhamnetin biosynthesis. The third group was considered the ideal hybrid combination for investigating the heterosis of flavonoid and terpenoid contents. Transcriptome analysis identified a total of 12,652 DEGs (TPM > 1) in various groups that were used for comparison, and DEGs encoding enzymes involved in various categories, including "carotenoid bio-synthesis" and "anthocyanin biosynthesis", were enriched in the hybrid combination (SZQ, 002). Moreover, the category of anthocyanin biosynthesis also was enriched in the hybrid combination (HMG, ZMG). The flavonoid pathway demonstrated more differential metabolites than the terpenoid pathway did. The WGCNA demonstrated notable positive correlations between the dark-green modules and many flavonoids and terpenoids. Moreover, there were 23 ERF genes in the co-expression network (r ≥ 0.90 and p < 0.05). Thus, ERF genes may play a significant role in regulating flavonoid and terpenoid biosynthesis. These findings enhance our understanding of the heterosis and coordinated regulation of flavonoid and terpenoid biosynthesis in pak choi, offering insights for genomics-based breeding improvements.
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Affiliation(s)
- Haibin Wang
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China; (H.W.); (T.H.); (A.B.); (H.X.); (J.W.); (X.H.)
| | - Tiantian Han
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China; (H.W.); (T.H.); (A.B.); (H.X.); (J.W.); (X.H.)
| | - Aimei Bai
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China; (H.W.); (T.H.); (A.B.); (H.X.); (J.W.); (X.H.)
| | - Huanhuan Xu
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China; (H.W.); (T.H.); (A.B.); (H.X.); (J.W.); (X.H.)
| | - Jianjun Wang
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China; (H.W.); (T.H.); (A.B.); (H.X.); (J.W.); (X.H.)
| | - Xilin Hou
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China; (H.W.); (T.H.); (A.B.); (H.X.); (J.W.); (X.H.)
- Nanjing Suman Plasma Engineering Research Institute, Nanjing Agricultural University, Nanjing 210095, China
| | - Ying Li
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China; (H.W.); (T.H.); (A.B.); (H.X.); (J.W.); (X.H.)
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Li S, Chen J, Guo X, Li X, Shen Q, Fu X, Tang D. Metabolic Patterns of Flavonoid and Its Key Gene Expression Characteristics of Five Cultivars of Tulipa gesneriana during Flower Development. PLANTS (BASEL, SWITZERLAND) 2024; 13:459. [PMID: 38337991 PMCID: PMC10857304 DOI: 10.3390/plants13030459] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Revised: 01/27/2024] [Accepted: 02/01/2024] [Indexed: 02/12/2024]
Abstract
Flower color is one of the most important ornamental traits of tulips (Tulipa gesneriana). Five typical tulip cultivars were selected to identify the flavonoid components and analyze their key gene expression in their tepals. Firstly, after preliminary determination of the pigment type, the flavonoids were identified by UPLC-Q-TOF-MS. A total of 17 anthoxanthins were detected in the five cultivars. The total anthoxanthin content in the white tulip and the red tulip showed a similar decreasing trend, while an increasing trend was observed in the black tulip. Similarly, a total of 13 anthocyanins were detected in five tulip cultivars. The black tulip contained the largest number of anthocyanins, mainly delphinidin derivatives (Dp) and cyanidin derivatives (Cy). The total anthocyanin content (TAC) in the orange, red, and black cultivars was higher than that in the white and yellow cultivars and presented an overall increase trend along with the flower development. TgCHS, TgFLS, TgF3H, TgF3'H, TgF3'5'H, and TgDFR, as key structural genes, were involved in the flavonoid synthesis pathway, and the expression patterns of these genes are basically consistent with the components and accumulation patterns of flavonoids mentioned above. Taken together, the flower color in tulips was closely related to the composition and content of anthocyanins and anthoxanthins, which were indeed regulated by certain key structural genes in the flavonoid pathway.
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Affiliation(s)
- Shu Li
- School of Design, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Jing Chen
- School of Design, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Xueying Guo
- School of Design, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Xin Li
- Instrumental Analysis Center, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Qiang Shen
- Shanghai Flower Port Enterprise Development Co., Ltd., Shanghai 200003, China
| | - Xueqing Fu
- School of Design, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Dongqin Tang
- School of Design, Shanghai Jiao Tong University, Shanghai 200240, China
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Pei L, Gao Y, Feng L, Zhang Z, Liu N, Yang B, Zhao N. Phenolic Acids and Flavonoids Play Important Roles in Flower Bud Differentiation in Mikania micrantha: Transcriptomics and Metabolomics. Int J Mol Sci 2023; 24:16550. [PMID: 38068873 PMCID: PMC10705899 DOI: 10.3390/ijms242316550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Revised: 11/13/2023] [Accepted: 11/17/2023] [Indexed: 12/18/2023] Open
Abstract
Mikania micrantha is a highly invasive vine, and its ability to sexually reproduce is a major obstacle to its eradication. The long-distance dissemination of M. micrantha depends on the distribution of seeds; therefore, inhibiting M. micrantha flowering and seed production is an effective control strategy. The number of blooms of M. micrantha differs at different altitudes (200, 900, and 1300 m). In this study, we used a combination of metabolomics and transcriptomics methods to study the patterns of metabolite accumulation in the flower buds of M. micrantha. Using LC-MS/MS, 658 metabolites were found in the flower buds of M. micrantha at three different altitudes (200, 900, and 1300 m). Flavonoids and phenolic acids were found to be the main differential metabolites, and their concentrations were lower at 900 m than at 200 m and 1300 m, with the concentrations of benzoic acid, ferulic acid, and caffeic acid being the lowest. The biosynthesis pathways for flavonoids and phenolic compounds were significantly enriched for differentially expressed genes (DEGs), according to the results of transcriptome analysis. The production of flavonoid and phenolic acids was strongly linked with the expressions of phenylalanine ammonia-lyase (PAL), caffeoyl-CoA O-methyltransferase (COMT), and 4-coumarate-CoA ligase (4CL), according to the results of the combined transcriptome and metabolome analysis. These genes' roles in the regulation of distinct phenolic acids and flavonoids during M. micrantha bud differentiation are still unknown. This study adds to our understanding of how phenolic acids and flavonoids are regulated in M. micrantha flower buds at various altitudes and identifies regulatory networks that may be involved in this phenomenon, offering a new approach for the prevention and management of M. micrantha.
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Affiliation(s)
- Ling Pei
- College of Life Sciences, Southwest Forestry University, Kunming 650224, China; (L.P.); (Y.G.); (L.F.); (Z.Z.)
| | - Yanzhu Gao
- College of Life Sciences, Southwest Forestry University, Kunming 650224, China; (L.P.); (Y.G.); (L.F.); (Z.Z.)
| | - Lichen Feng
- College of Life Sciences, Southwest Forestry University, Kunming 650224, China; (L.P.); (Y.G.); (L.F.); (Z.Z.)
| | - Zihan Zhang
- College of Life Sciences, Southwest Forestry University, Kunming 650224, China; (L.P.); (Y.G.); (L.F.); (Z.Z.)
| | - Naiyong Liu
- Key Laboratory of Forest Disaster Warning and Control of Yunnan Province, Southwest Forestry University, Kunming 650224, China;
| | - Bin Yang
- Key Laboratory of Forest Disaster Warning and Control of Yunnan Province, Southwest Forestry University, Kunming 650224, China;
| | - Ning Zhao
- College of Life Sciences, Southwest Forestry University, Kunming 650224, China; (L.P.); (Y.G.); (L.F.); (Z.Z.)
- Key Laboratory of Forest Disaster Warning and Control of Yunnan Province, Southwest Forestry University, Kunming 650224, China;
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Ma R, Luo J, Wang W, Song T, Fu Y. Function of the R2R3-MYB Transcription Factors in Dalbergia odorifera and Their Relationship with Heartwood Formation. Int J Mol Sci 2023; 24:12430. [PMID: 37569814 PMCID: PMC10419101 DOI: 10.3390/ijms241512430] [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: 06/21/2023] [Revised: 07/30/2023] [Accepted: 07/31/2023] [Indexed: 08/13/2023] Open
Abstract
R2R3-MYB transcription factors (TFs) form one of the most important TF families involved in regulating various physiological functions in plants. The heartwood of Dalbergia odorifera is a kind of high-grade mahogany and valuable herbal medicine with wide application. However, the role of R2R3-MYB genes in the growth and development of D. odorifera, especially their relevance to heartwood formation, has not been revealed. A total of 126 R2R3-MYBs were screened from the D. odorifera genome and named DodMYB1-126 based on their location on 10 chromosomes. The collinearity results showed that purification selection was the main driving force for the evolution of the R2R3-MYB TFs family, and whole genome/fragment replication event was the main form for expanding the R2R3-MYB family, generating a divergence of gene structure and function. Comparative phylogenetic analysis classified the R2R3-MYB TFs into 33 subfamilies. S3-7,10,12-13,21 and N4-7 were extensively involved in the metabolic process; S9,13,16-19,24-25 and N1-3,8 were associated with the growth and development of D. odorifera. Based on the differential transcriptional expression levels of R2R3-MYBs in different tissues, DodMYB32, DodMYB55, and DodMYB89 were tentatively screened for involvement in the regulatory process of heartwood. Further studies have shown that the DodMYB89, localized in the nucleus, has transcriptional activation activity and is involved in regulating the biosynthesis of the secondary metabolites of heartwood by activating the promoters of the structural genes DodI2'H and DodCOMT. This study aimed to comprehensively analyze the functions of the R2R3-MYB TFs and screen for candidate genes that might be involved in heartwood formation of D. odorifera.
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Affiliation(s)
- Ruoke Ma
- Key Laboratory of National Forestry and Grassland Administration for Fast-Growing Tree Breeding and Cultivation in Central and Southern China, College of Forestry, Guangxi University, Nanning 530004, China; (R.M.); (J.L.); (W.W.)
| | - Jia Luo
- Key Laboratory of National Forestry and Grassland Administration for Fast-Growing Tree Breeding and Cultivation in Central and Southern China, College of Forestry, Guangxi University, Nanning 530004, China; (R.M.); (J.L.); (W.W.)
| | - Weijie Wang
- Key Laboratory of National Forestry and Grassland Administration for Fast-Growing Tree Breeding and Cultivation in Central and Southern China, College of Forestry, Guangxi University, Nanning 530004, China; (R.M.); (J.L.); (W.W.)
| | - Tianqi Song
- College of Agronomy, Northwest A&F University, Xianyang 712000, China;
| | - Yunlin Fu
- Key Laboratory of National Forestry and Grassland Administration for Fast-Growing Tree Breeding and Cultivation in Central and Southern China, College of Forestry, Guangxi University, Nanning 530004, China; (R.M.); (J.L.); (W.W.)
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9
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Bao T, Kimani S, Li Y, Li H, Yang S, Zhang J, Wang Q, Wang Z, Ning G, Wang L, Gao X. Allelic variation of terpene synthases drives terpene diversity in the wild species of the Freesia genus. PLANT PHYSIOLOGY 2023; 192:2419-2435. [PMID: 36932696 PMCID: PMC10315281 DOI: 10.1093/plphys/kiad172] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Revised: 02/24/2023] [Accepted: 02/28/2023] [Indexed: 06/18/2023]
Abstract
Terpene synthases (TPSs) play pivotal roles in conferring the structural diversity of terpenoids, which are mainly emitted from flowers, whereas the genetic basis of the release of floral volatile terpenes remains largely elusive. Though quite similar in sequence, TPS allelic variants still function divergently, and how they drive floral terpene diversity in closely related species remains unknown. Here, TPSs responsible for the floral scent of wild Freesia species were characterized, and the functions of their natural allelic variants, as well as the causal amino acid residues, were investigated in depth. Besides the 8 TPSs previously reported in modern cultivars, 7 additional TPSs were functionally evaluated to contribute to the major volatiles emitted from wild Freesia species. Functional characterization of allelic natural variants demonstrated that allelic TPS2 and TPS10 variants changed the enzymatic capacity while allelic TPS6 variants drove the diversity of floral terpene products. Further residue substitution analysis revealed the minor residues determining the enzyme catalytic activity and product specificity. The clarification of TPSs in wild Freesia species reveals that allelic TPS variants evolved differently to determine the interspecific floral volatile terpenes in the genus and might be used for modern cultivar improvement.
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Affiliation(s)
- Tingting Bao
- Key Laboratory of Molecular Epigenetics of MOE, Northeast Normal University, Changchun 130024, China
| | - Shadrack Kimani
- Key Laboratory of Molecular Epigenetics of MOE, Northeast Normal University, Changchun 130024, China
- School of Pure and Applied Sciences, Karatina University, Karatina 10101, Kenya
| | - Yueqing Li
- Key Laboratory of Molecular Epigenetics of MOE, Northeast Normal University, Changchun 130024, China
| | - Hongjie Li
- Key Laboratory of Molecular Epigenetics of MOE, Northeast Normal University, Changchun 130024, China
| | - Song Yang
- Key Laboratory of Molecular Epigenetics of MOE, Northeast Normal University, Changchun 130024, China
| | - Jia Zhang
- Key Laboratory of Molecular Epigenetics of MOE, Northeast Normal University, Changchun 130024, China
| | - Qiuyue Wang
- Key Laboratory of Molecular Epigenetics of MOE, Northeast Normal University, Changchun 130024, China
| | - Zhaoxuan Wang
- Key Laboratory of Molecular Epigenetics of MOE, Northeast Normal University, Changchun 130024, China
| | - Guogui Ning
- Key laboratory of Horticultural Plant Biology, Ministry of Education, College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan 430070, China
| | - Li Wang
- Key Laboratory of Molecular Epigenetics of MOE, Northeast Normal University, Changchun 130024, China
| | - Xiang Gao
- Key Laboratory of Molecular Epigenetics of MOE, Northeast Normal University, Changchun 130024, China
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10
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Zhu J, Wang Y, Wang Q, Li B, Wang X, Zhou X, Zhang H, Xu W, Li S, Wang L. The combination of DNA methylation and positive regulation of anthocyanin biosynthesis by MYB and bHLH transcription factors contributes to the petal blotch formation in Xibei tree peony. HORTICULTURE RESEARCH 2023; 10:uhad100. [PMID: 37427034 PMCID: PMC10327543 DOI: 10.1093/hr/uhad100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Accepted: 05/05/2023] [Indexed: 07/11/2023]
Abstract
Xibei tree peony is a distinctive cultivar group that features red-purple blotches in petals. Interestingly, the pigmentations of blotches and non-blotches are largely independent of one another. The underlying molecular mechanism had attracted lots of attention from investigators, but was still uncertain. Our present work demonstrates the factors that are closely related to blotch formation in Paeonia rockii 'Shu Sheng Peng Mo'. Non-blotch pigmentation is prevented by the silencing of anthocyanin structural genes, among which PrF3H, PrDFR, and PrANS are the three major genes. We characterized two R2R3-MYBs as the key transcription factors that control the early and late anthocyanin biosynthetic pathways. PrMYBa1, which belongs to MYB subgroup 7 (SG7) was found to activate the early biosynthetic gene (EBG) PrF3H by interacting with SG5 member PrMYBa2 to form an 'MM' complex. The SG6 member PrMYBa3 interacts with two SG5 (IIIf) bHLHs to synergistically activate the late biosynthetic genes (LBGs) PrDFR and PrANS, which is essential for anthocyanin accumulation in petal blotches. The comparison of methylation levels of the PrANS and PrF3H promoters between blotch and non-blotch indicated a correlation between hypermethylation and gene silencing. The methylation dynamics of PrANS promoter during flower development revealed a potential early demethylating reaction, which may have contributed to the particular expression of PrANS solely in the blotch area. We suggest that the formation of petal blotch may be highly associated with the cooperation of transcriptional activation and DNA methylation of structural gene promoters.
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Affiliation(s)
- Jin Zhu
- Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
- China National Botanical Garden Beijing 100093, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yizhou Wang
- Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
- China National Botanical Garden Beijing 100093, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Qianyu Wang
- Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
- China National Botanical Garden Beijing 100093, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Bing Li
- Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
- China National Botanical Garden Beijing 100093, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiaohan Wang
- Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
- China National Botanical Garden Beijing 100093, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xian Zhou
- Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
- China National Botanical Garden Beijing 100093, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Hechen Zhang
- Horticulture Research Institute, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China
| | - Wenzhong Xu
- Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
- China National Botanical Garden Beijing 100093, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Shanshan Li
- Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
- China National Botanical Garden Beijing 100093, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Liangsheng Wang
- Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
- China National Botanical Garden Beijing 100093, China
- University of Chinese Academy of Sciences, Beijing 100049, China
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11
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Zhang X, Li L, He Y, Lang Z, Zhao Y, Tao H, Li Q, Hong G. The CsHSFA-CsJAZ6 module-mediated high temperature regulates flavonoid metabolism in Camellia sinensis. PLANT, CELL & ENVIRONMENT 2023. [PMID: 37190917 DOI: 10.1111/pce.14610] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Accepted: 05/01/2023] [Indexed: 05/17/2023]
Abstract
High temperatures (HTs) seriously affect the yield and quality of tea. Catechins, derived from the flavonoid pathway, are characteristic compounds that contribute to the flavour of tea leaves. In this study, we first showed that the flavonoid content of tea leaves was significantly reduced under HT conditions via metabolic profiles; and then demonstrated that two transcription factors, CsHSFA1b and CsHSFA2 were activated by HT and negatively regulate flavonoid biosynthesis during HT treatment. Jasmonate (JA), a defensive hormone, plays a key role in plant adaption to environmental stress. However, little has been reported on its involvement in HT response in tea. Herein, we demonstrated that CsHSFA1b and CsHSFA2 activate CsJAZ6 expression through directly binding to heat shock elements in its promoter, and thereby repress the JA pathway. Most secondary metabolites are regulated by JA, including catechin in tea. Our study reported that CsJAZ6 directly interacts with CsEGL3 and CsTTG1 and thereby reduces catechin accumulation. From this, we proposed a CsHSFA-CsJAZ6-mediated HT regulation model of catechin biosynthesis. We also determined that negative regulation of the JA pathway by CsHSFAs and its homologues is conserved in Arabidopsis. These findings broaden the applicability of the regulation of JAZ by HSF transcription factors and further suggest the JA pathway as a valuable candidate for HT-resistant breeding and cultivation.
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Affiliation(s)
- Xueying Zhang
- State Key Laboratory for Managing Biotic and Chemical Treats to the Quality and Safety of Agro-Products, Key Laboratory of Biotechnology in Plant Protection of MOA of China and Zhejiang Province, Institute of Virology and Biotechnology, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
| | - Linying Li
- State Key Laboratory for Managing Biotic and Chemical Treats to the Quality and Safety of Agro-Products, Key Laboratory of Biotechnology in Plant Protection of MOA of China and Zhejiang Province, Institute of Virology and Biotechnology, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
| | - Yuqing He
- State Key Laboratory for Managing Biotic and Chemical Treats to the Quality and Safety of Agro-Products, Key Laboratory of Biotechnology in Plant Protection of MOA of China and Zhejiang Province, Institute of Virology and Biotechnology, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
| | - Zhuoliang Lang
- State Key Laboratory for Managing Biotic and Chemical Treats to the Quality and Safety of Agro-Products, Key Laboratory of Biotechnology in Plant Protection of MOA of China and Zhejiang Province, Institute of Virology and Biotechnology, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
| | - Yao Zhao
- State Key Laboratory for Managing Biotic and Chemical Treats to the Quality and Safety of Agro-Products, Key Laboratory of Biotechnology in Plant Protection of MOA of China and Zhejiang Province, Institute of Virology and Biotechnology, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
| | - Han Tao
- State Key Laboratory for Managing Biotic and Chemical Treats to the Quality and Safety of Agro-Products, Key Laboratory of Biotechnology in Plant Protection of MOA of China and Zhejiang Province, Institute of Virology and Biotechnology, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
| | - Qingsheng Li
- Institute of Sericulture and Tea, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
| | - Gaojie Hong
- State Key Laboratory for Managing Biotic and Chemical Treats to the Quality and Safety of Agro-Products, Key Laboratory of Biotechnology in Plant Protection of MOA of China and Zhejiang Province, Institute of Virology and Biotechnology, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
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12
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Ding X, Guo J, Lv M, Wang H, Sheng Y, Liu Y, Gai J, Yang S. The miR156b-GmSPL2b module mediates male fertility regulation of cytoplasmic male sterility-based restorer line under high-temperature stress in soybean. PLANT BIOTECHNOLOGY JOURNAL 2023. [PMID: 37057908 PMCID: PMC10363761 DOI: 10.1111/pbi.14056] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Revised: 02/17/2023] [Accepted: 04/01/2023] [Indexed: 06/19/2023]
Abstract
High-temperature (HT) stress at flowering stage causes significant damage to soybean, including pollen abortion and fertilization failure, but few genes involved in male fertility regulation under HT stress in soybean have been characterized. Here, we demonstrated that miR156b-GmSPL2b module involved in male fertility regulation of soybean cytoplasmic male sterility (CMS)-based restorer line under HT stress. Overexpression of miR156b decreased male fertility in soybean CMS-based restorer line and its hybrid F1 with CMS line under HT stress. RNA-seq analysis found that miR156b mediated male fertility regulation in soybean under HT stress by regulating the expression of pollen development and HT response related genes. Metabolomic analysis of miR156bOE revealed reduction in flavonoid content under HT stress. Integrated transcriptomic and metabolomic analysis showed that the overexpression of miR156b caused flavonoid metabolism disorder in soybean flower bud under HT stress. Knockout of GmSPL2b also decreased the thermotolerance of soybean CMS-based restorer line during flowering. Moreover, GmSPL2b turned out to be directly bounded to the promoter of GmHSFA6b. Further verification indicated that GmHSFA6b overexpression enhanced HT tolerance in Arabidopsis during flowering. Substance content and gene expression analysis revealed that miR156b-GmSPL2b may mediate reactive oxygen species clearance by regulating flavonoid metabolism, thus participating in the regulation of male fertility in soybean under HT stress. This study not only provided important progress for understanding the molecular mechanism of miR156b-GmSPL2b regulating the male fertility of soybean CMS-based restorer line under HT stress, but also provided genetic resources and theoretical basis for creating HT-tolerant strong restorer lines.
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Affiliation(s)
- Xianlong Ding
- Soybean Research Institute, National Center for Soybean Improvement, Key Laboratory of Biology and Genetic Improvement of Soybean (General, Ministry of Agriculture and Rural Affairs of the People's Republic of China), MOE National Innovation Platform for Soybean Bio-breeding Industry and Education Integration, State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Jiangsu Collaborative Innovation Center for Modern Crop Production, College of Agriculture, Nanjing Agricultural University, Nanjing, China
| | - Jinfeng Guo
- Soybean Research Institute, National Center for Soybean Improvement, Key Laboratory of Biology and Genetic Improvement of Soybean (General, Ministry of Agriculture and Rural Affairs of the People's Republic of China), MOE National Innovation Platform for Soybean Bio-breeding Industry and Education Integration, State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Jiangsu Collaborative Innovation Center for Modern Crop Production, College of Agriculture, Nanjing Agricultural University, Nanjing, China
| | - Menglin Lv
- Soybean Research Institute, National Center for Soybean Improvement, Key Laboratory of Biology and Genetic Improvement of Soybean (General, Ministry of Agriculture and Rural Affairs of the People's Republic of China), MOE National Innovation Platform for Soybean Bio-breeding Industry and Education Integration, State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Jiangsu Collaborative Innovation Center for Modern Crop Production, College of Agriculture, Nanjing Agricultural University, Nanjing, China
| | - Hongjie Wang
- Soybean Research Institute, National Center for Soybean Improvement, Key Laboratory of Biology and Genetic Improvement of Soybean (General, Ministry of Agriculture and Rural Affairs of the People's Republic of China), MOE National Innovation Platform for Soybean Bio-breeding Industry and Education Integration, State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Jiangsu Collaborative Innovation Center for Modern Crop Production, College of Agriculture, Nanjing Agricultural University, Nanjing, China
| | - Ying Sheng
- Soybean Research Institute, National Center for Soybean Improvement, Key Laboratory of Biology and Genetic Improvement of Soybean (General, Ministry of Agriculture and Rural Affairs of the People's Republic of China), MOE National Innovation Platform for Soybean Bio-breeding Industry and Education Integration, State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Jiangsu Collaborative Innovation Center for Modern Crop Production, College of Agriculture, Nanjing Agricultural University, Nanjing, China
| | - Ying Liu
- Soybean Research Institute, National Center for Soybean Improvement, Key Laboratory of Biology and Genetic Improvement of Soybean (General, Ministry of Agriculture and Rural Affairs of the People's Republic of China), MOE National Innovation Platform for Soybean Bio-breeding Industry and Education Integration, State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Jiangsu Collaborative Innovation Center for Modern Crop Production, College of Agriculture, Nanjing Agricultural University, Nanjing, China
| | - Junyi Gai
- Soybean Research Institute, National Center for Soybean Improvement, Key Laboratory of Biology and Genetic Improvement of Soybean (General, Ministry of Agriculture and Rural Affairs of the People's Republic of China), MOE National Innovation Platform for Soybean Bio-breeding Industry and Education Integration, State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Jiangsu Collaborative Innovation Center for Modern Crop Production, College of Agriculture, Nanjing Agricultural University, Nanjing, China
| | - Shouping Yang
- Soybean Research Institute, National Center for Soybean Improvement, Key Laboratory of Biology and Genetic Improvement of Soybean (General, Ministry of Agriculture and Rural Affairs of the People's Republic of China), MOE National Innovation Platform for Soybean Bio-breeding Industry and Education Integration, State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Jiangsu Collaborative Innovation Center for Modern Crop Production, College of Agriculture, Nanjing Agricultural University, Nanjing, China
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13
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Zhang Y, Duan J, Wang Q, Zhang M, Zhi H, Bai Z, Zhang Y, Luo J. The Paeonia qiui R2R3-MYB Transcription Factor PqMYBF1 Positively Regulates Flavonol Accumulation. PLANTS (BASEL, SWITZERLAND) 2023; 12:1427. [PMID: 37050052 PMCID: PMC10096829 DOI: 10.3390/plants12071427] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 03/11/2023] [Accepted: 03/21/2023] [Indexed: 06/19/2023]
Abstract
Tree peony is a "spring colored-leaf" plant which has red leaves in early spring, and the red color of the leaves usually fades in late spring. Flavonols are one subgroup of flavonoids, and they affect the plant organs' color as co-pigments of anthocyanins. To investigate the color variation mechanism of leaves in tree peony, PqMYBF1, one flavonol biosynthesis-related MYB gene was isolated from Paeonia qiui and characterized. PqMYBF1 contained the SG7 and SG7-2 motifs which are unique in flavonol-specific MYB regulators. Subcellular localization and transactivation assay showed that PqMYBF1 localized to the nucleus and acted as a transcriptional activator. The ectopic expression of PqMYBF1 in transgenic tobacco caused an observable increase in flavonol level and the anthocyanin accumulation was decreased significantly, resulting in pale pink flowers. Dual-luciferase reporter assays showed that PqMYBF1 could activate the promoters of PqCHS, PqF3H, and PqFLS. These results suggested that PqMYBF1 could promote flavonol biosynthesis by activating PqCHS, PqF3H, and PqFLS expression, which leads metabolic flux from anthocyanin to flavonol pathway, resulting in more flavonol accumulation. These findings provide a new train of thought for the molecular mechanism of leaf color variation in tree peony in spring, which will be helpful for the molecular breeding of tree peony with colored foliage.
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Affiliation(s)
- Yue Zhang
- College of Landscape Architecture and Arts, Northwest A&F University, Yangling 712100, China
- National Engineering Research Center for Oil Peony, Yangling 712100, China
| | - Jingjing Duan
- College of Landscape Architecture and Arts, Northwest A&F University, Yangling 712100, China
- National Engineering Research Center for Oil Peony, Yangling 712100, China
| | - Qiaoyun Wang
- College of Landscape Architecture and Arts, Northwest A&F University, Yangling 712100, China
- National Engineering Research Center for Oil Peony, Yangling 712100, China
| | - Min Zhang
- College of Landscape Architecture and Arts, Northwest A&F University, Yangling 712100, China
- National Engineering Research Center for Oil Peony, Yangling 712100, China
| | - Hui Zhi
- College of Landscape Architecture and Arts, Northwest A&F University, Yangling 712100, China
- National Engineering Research Center for Oil Peony, Yangling 712100, China
| | - Zhangzhen Bai
- College of Landscape Architecture and Arts, Northwest A&F University, Yangling 712100, China
- National Engineering Research Center for Oil Peony, Yangling 712100, China
| | - Yanlong Zhang
- College of Landscape Architecture and Arts, Northwest A&F University, Yangling 712100, China
- National Engineering Research Center for Oil Peony, Yangling 712100, China
| | - Jianrang Luo
- College of Landscape Architecture and Arts, Northwest A&F University, Yangling 712100, China
- National Engineering Research Center for Oil Peony, Yangling 712100, China
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14
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Yang J, Wu X, Aucapiña CB, Zhang D, Huang J, Hao Z, Zhang Y, Ren Y, Miao Y. NtMYB12 requires for competition between flavonol and (pro)anthocyanin biosynthesis in Narcissus tazetta tepals. MOLECULAR HORTICULTURE 2023; 3:2. [PMID: 37789446 PMCID: PMC10515073 DOI: 10.1186/s43897-023-00050-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2022] [Accepted: 01/19/2023] [Indexed: 10/05/2023]
Abstract
The color of flowers is one of the main characteristics adopted for plants to attract pollinators to ensure the reproductive success of the plant, they are also important in their ornamental appeal in Narcissus plant. In this study, we identified a NtMYB12 locus encoding an R2R3-MYB transcription factor. Comparative transcriptome analysis of loss- and gain- of NtMYB12 tissue relative to wild-type narcissus showed NtMYB12 was mainly involved in flavonol and phenylpropanoid metabolic pathways. Biochemical evidences of dual-luciferase activity and chromatin immunoprecipitation assay supported that MYB12 directly bound to promoters of NtFLS, NtLAR, and NtDFR that were cloned by genome walking assay, and activated NtFLS and NtLAR expression but repressed NtDFR expression. More interestingly, NtMYB12 can interact with NtbHLH1 and NtWD40-1 proteins via R3 domain that were selected by transcriptome-based WGCNA and confirmed by yeast two hybrid, bimolecular fluorescence complementation and coimmunoprecipitation assay. Interaction of NtMYB12 with NtbHLH1 and NtWD40-1 forming MYB-bHLH-WD40 triplex specially activated NtDFR and NtANS expression and promoted (pro)anthocyanin accumulation, while NtMYB12 alone activated NtFLS and NtLAR expression and accumulated flavonols, but repressed NtDFR expression. These results indicated that NtMYB12 alone or NtMYB12-bHLH1-WD40-1 triplex requires for competition of metabolism fluxes between flavonol and (pro)anthocyanin biosynthesis. NtMYB12 dually functions on flavonol and proanthocyanin biogenesis via physically binding to NtFLS and NtLAR promoter activating their expression and on (pro)anthocyanin biosynthesis via NtMYB12-NtWD40-NtbHLH (MBW) triplex activating NtDFR and NtANS expression. Requirement of NtMYB12 alone or MBW complex for the competition between flavonol and anthocyanin biosynthesis results in narcissus colorized petal traits.
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Affiliation(s)
- Jingwen Yang
- Fujian Provincial Key Laboratory of Plant Functional Biology, Fujian Agriculture and Forestry University, Fuzhou, 350002 China
| | - Xi Wu
- Fujian Provincial Key Laboratory of Plant Functional Biology, Fujian Agriculture and Forestry University, Fuzhou, 350002 China
| | - Cristina belen Aucapiña
- Fujian Provincial Key Laboratory of Plant Functional Biology, Fujian Agriculture and Forestry University, Fuzhou, 350002 China
| | - Deyu Zhang
- Fujian Provincial Key Laboratory of Plant Functional Biology, Fujian Agriculture and Forestry University, Fuzhou, 350002 China
| | - Jiazhi Huang
- Fujian Provincial Key Laboratory of Plant Functional Biology, Fujian Agriculture and Forestry University, Fuzhou, 350002 China
| | - Ziyuan Hao
- Fujian Provincial Key Laboratory of Plant Functional Biology, Fujian Agriculture and Forestry University, Fuzhou, 350002 China
| | - Yu Zhang
- Fujian Provincial Key Laboratory of Plant Functional Biology, Fujian Agriculture and Forestry University, Fuzhou, 350002 China
| | - Yujun Ren
- Fujian Provincial Key Laboratory of Plant Functional Biology, Fujian Agriculture and Forestry University, Fuzhou, 350002 China
| | - Ying Miao
- Fujian Provincial Key Laboratory of Plant Functional Biology, Fujian Agriculture and Forestry University, Fuzhou, 350002 China
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15
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Wang J, Zhang H, Tian S, Hao W, Chen K, Du L. The R2R3MYB transcription factors MaMYBF and MaMYB1 regulate flavonoid biosynthesis in grape hyacinth. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2023; 194:85-95. [PMID: 36395598 DOI: 10.1016/j.plaphy.2022.11.010] [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: 07/23/2022] [Revised: 11/06/2022] [Accepted: 11/08/2022] [Indexed: 06/16/2023]
Abstract
R2R3 MYBs play vital roles in the regulation of flavonoid biosynthesis. However, the regulatory network of R2R3 MYBs in flavonoid biosynthesis is not fully understood in grape hyacinth (Muscari spp.). Here, we identified two R2R3 MYBs, MaMYBF and MaMYB1, as potential regulators of flavonol and anthocyanin biosynthesis, respectively. MaMYBF and MaMYB1 expression was elevated during flower development and was light-induced, and the expression patterns were related to those of the flavonoid structural genes MaFLS and MaDFR, respectively. The BiFC assay verified that MaMYB1 interacts with MabHLH1, but MaMYBF does not. A dual luciferase assay revealed that MaMYBF alone strongly activated pMaFLS, and its activation was attenuated at reduced doses of MaMYBF in the presence of MabHLH1, MaMybA, and MaMYB1. MaDFR transcription mediated by MaMybA and MabHLH1 was inhibited by MaMYB1. Moreover, overexpression of MaMYBF and MaMYB1 in tobacco reduced flower pigmentation and repressed the expression of flavonoid pathway key structural genes. Therefore, MaMYBF regulates the flavonol pathway independently of cofactors. Whereas MaMYB1 regulates anthocyanin biosynthesis by binding to MabHLH1 and disrupting the MaMybA-bHLH complex in grape hyacinth. Our results offer new insights into the intricate regulatory network of flavonoids in grape hyacinth involving the regulation of both flavonol and anthocyanin.
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Affiliation(s)
- Jiangyu Wang
- College of Landscape Architecture and Arts, Northwest A&F University, Yangling, 712100, Shaanxi, PR China; State Key Laboratory of Crop Stress Biology for Arid Areas and College of Horticulture, Northwest A&F University, Yangling, 712100, Shaanxi, PR China; Key Laboratory of Horticultural Plant Biology and Germplasm Innovation in Northwest China, Ministry of Agriculture, Yangling, 712100, Shaanxi, PR China
| | - Han Zhang
- College of Landscape Architecture and Arts, Northwest A&F University, Yangling, 712100, Shaanxi, PR China; State Key Laboratory of Crop Stress Biology for Arid Areas and College of Horticulture, Northwest A&F University, Yangling, 712100, Shaanxi, PR China; Key Laboratory of Horticultural Plant Biology and Germplasm Innovation in Northwest China, Ministry of Agriculture, Yangling, 712100, Shaanxi, PR China
| | - Shuting Tian
- College of Landscape Architecture and Arts, Northwest A&F University, Yangling, 712100, Shaanxi, PR China; State Key Laboratory of Crop Stress Biology for Arid Areas and College of Horticulture, Northwest A&F University, Yangling, 712100, Shaanxi, PR China; Key Laboratory of Horticultural Plant Biology and Germplasm Innovation in Northwest China, Ministry of Agriculture, Yangling, 712100, Shaanxi, PR China
| | - Wenhui Hao
- College of Landscape Architecture and Arts, Northwest A&F University, Yangling, 712100, Shaanxi, PR China; State Key Laboratory of Crop Stress Biology for Arid Areas and College of Horticulture, Northwest A&F University, Yangling, 712100, Shaanxi, PR China; Key Laboratory of Horticultural Plant Biology and Germplasm Innovation in Northwest China, Ministry of Agriculture, Yangling, 712100, Shaanxi, PR China
| | - Kaili Chen
- College of Fisheries, Southwest University, Rongchang, 402460, Chongqing, PR China
| | - Lingjuan Du
- College of Landscape Architecture and Arts, Northwest A&F University, Yangling, 712100, Shaanxi, PR China; State Key Laboratory of Crop Stress Biology for Arid Areas and College of Horticulture, Northwest A&F University, Yangling, 712100, Shaanxi, PR China; Key Laboratory of Horticultural Plant Biology and Germplasm Innovation in Northwest China, Ministry of Agriculture, Yangling, 712100, Shaanxi, PR China.
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16
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Wang R, Mao C, Ming F. PeMYB4L interacts with PeMYC4 to regulate anthocyanin biosynthesis in Phalaenopsis orchid. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2022; 324:111423. [PMID: 35995112 DOI: 10.1016/j.plantsci.2022.111423] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2022] [Revised: 08/07/2022] [Accepted: 08/14/2022] [Indexed: 06/15/2023]
Abstract
Phalaenopsis spp., one genus of Orchidaceae, have become very popular worldwide for their fascinating flowers with various colors and pigmentation patterns. Several R2R3-MYB transcription factors have been reported to function in anthocyanin accumulation in Phalaenopsis spp. However, its molecular mechanism underlying the detailed regulatory pathway remains poorly understood. In this study, we identified a novel subgroup 2 R2R3-MYB transcription factor PeMYB4L, the expression profile of which was concomitant with red color formation in Phalaenopsis spp. flowers. Virus-induced gene silencing (VIGS) and transient overexpression assay verified that PeMYB4L promotes anthocyanin accumulation in flower tissues. In addition, PeMYB4L could directly regulates the expression of Phalaenopsis spp. chalcone synthase gene (PeCHS) through MYBST1 (GGATA) binding site. It's interesting that the basic-helix-loop-helix (bHLH) protein PeMYC4 shows opposite expression pattern from PeMYB4L in anthocyanin accumulation. Furthermore, PeMYC4 was verified to form MYB-bHLH complex with PeMYB4L, and attenuated the expression of PeCHS and weakened anthocyanin production, indicating a novel regulatory model of MYB-bHLH complex. Our findings uncover the detailed regulatory pathway of MYB-bHLH, and might provide a new insight into the complicated anthocyanin pigmentation in Phalaenopsis spp.
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Affiliation(s)
- Rui Wang
- Shanghai Key Laboratory of Plant Molecular Sciences, College of Life Sciences, Shanghai Normal University, Shanghai 200234, China; The Biotechnology Research Institute, Shanghai Academy of Agricultural Sciences, Shanghai 201106, China
| | - Chanjuan Mao
- Shanghai Key Laboratory of Plant Molecular Sciences, College of Life Sciences, Shanghai Normal University, Shanghai 200234, China; The Biotechnology Research Institute, Shanghai Academy of Agricultural Sciences, Shanghai 201106, China
| | - Feng Ming
- Shanghai Key Laboratory of Plant Molecular Sciences, College of Life Sciences, Shanghai Normal University, Shanghai 200234, China; The Biotechnology Research Institute, Shanghai Academy of Agricultural Sciences, Shanghai 201106, China.
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17
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Tang D, Shen Y, Li F, Yue R, Duan J, Ye Z, Lin Y, Zhou W, Yang Y, Chen L, Wang H, Zhao J, Li P. Integrating metabolite and transcriptome analysis revealed the different mechanisms of characteristic compound biosynthesis and transcriptional regulation in tea flowers. FRONTIERS IN PLANT SCIENCE 2022; 13:1016692. [PMID: 36247612 PMCID: PMC9557745 DOI: 10.3389/fpls.2022.1016692] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Accepted: 09/12/2022] [Indexed: 06/16/2023]
Abstract
The flowers of tea plants (Camellia sinensis), as well as tea leaves, contain abundant secondary metabolites and are big potential resources for the extraction of bioactive compounds or preparation of functional foods. However, little is known about the biosynthesis and transcriptional regulation mechanisms of those metabolites in tea flowers, such as terpenoid, flavonol, catechins, caffeine, and theanine. This study finely integrated target and nontarget metabolism analyses to explore the metabolic feature of developing tea flowers. Tea flowers accumulated more abundant terpenoid compounds than young leaves. The transcriptome data of developing flowers and leaves showed that a higher expression level of later genes of terpenoid biosynthesis pathway, such as Terpene synthases gene family, in tea flowers was the candidate reason of the more abundant terpenoid compounds than in tea leaves. Differently, even though flavonol and catechin profiling between tea flowers and leaves was similar, the gene family members of flavonoid biosynthesis were selectively expressed by tea flowers and tea leaves. Transcriptome and phylogenetic analyses indicated that the regulatory mechanism of flavonol biosynthesis was perhaps different between tea flowers and leaves. However, the regulatory mechanism of catechin biosynthesis was perhaps similar between tea flowers and leaves. This study not only provides a global vision of metabolism and transcriptome in tea flowers but also uncovered the different mechanisms of biosynthesis and transcriptional regulation of those important compounds.
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Affiliation(s)
- Dingkun Tang
- State Key Laboratory of Tea Plant Biology and Utilization, College of Tea and Food Science and Technology, Anhui Agricultural University, Hefei, China
| | - Yihua Shen
- State Key Laboratory of Tea Plant Biology and Utilization, College of Tea and Food Science and Technology, Anhui Agricultural University, Hefei, China
| | - Fangdong Li
- College of Science, Anhui Agricultural University, Hefei, China
| | - Rui Yue
- State Key Laboratory of Tea Plant Biology and Utilization, College of Tea and Food Science and Technology, Anhui Agricultural University, Hefei, China
| | - Jianwei Duan
- State Key Laboratory of Tea Plant Biology and Utilization, College of Tea and Food Science and Technology, Anhui Agricultural University, Hefei, China
| | - Zhili Ye
- State Key Laboratory of Tea Plant Biology and Utilization, College of Tea and Food Science and Technology, Anhui Agricultural University, Hefei, China
| | - Ying Lin
- State Key Laboratory of Tea Plant Biology and Utilization, College of Tea and Food Science and Technology, Anhui Agricultural University, Hefei, China
| | - Wei Zhou
- State Key Laboratory of Tea Plant Biology and Utilization, College of Tea and Food Science and Technology, Anhui Agricultural University, Hefei, China
| | - Yilin Yang
- State Key Laboratory of Tea Plant Biology and Utilization, College of Tea and Food Science and Technology, Anhui Agricultural University, Hefei, China
| | - Lixiao Chen
- Municipal Research Institute for Processing of Agricultural and Featured Products, Shiyan Academy of Agricultural Science, Shiyan, China
| | - Hongyan Wang
- State Key Laboratory of Tea Plant Biology and Utilization, College of Tea and Food Science and Technology, Anhui Agricultural University, Hefei, China
| | - Jian Zhao
- State Key Laboratory of Tea Plant Biology and Utilization, College of Tea and Food Science and Technology, Anhui Agricultural University, Hefei, China
| | - Penghui Li
- State Key Laboratory of Tea Plant Biology and Utilization, College of Tea and Food Science and Technology, Anhui Agricultural University, Hefei, China
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18
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Luan Y, Chen Z, Wang X, Zhang H, Tao J, Zhao D. Herbaceous peony PlACLB2 positively regulates red petal formation by promoting anthocyanin accumulation. FRONTIERS IN PLANT SCIENCE 2022; 13:992529. [PMID: 36247540 PMCID: PMC9554437 DOI: 10.3389/fpls.2022.992529] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Accepted: 09/05/2022] [Indexed: 06/16/2023]
Abstract
ATP-citrate lyase (ACL) gene catalyzes the formation of acetyl-CoA to provide intermediate precursors for many secondary metabolites, and also plays an important role in anthocyanin biosynthesis of plants. Herbaceous peony (Paeonia lactiflora Pall.) is an international cut flower known for its rich flower colors, however, the function of the ACL gene in flower color regulation is still unclear. Here, double-colored P. lactiflora 'Hebao Jinlian' were used to study the molecular mechanism of red petal, and acetyl-CoA and anthocyanin biosynthesis related PlACLB2, PlCHS, PlDFR, PlANS, and PlbHLH1 genes were initially found to highly expressed in the red outer-petals. The expression pattern of PlACLB2 was consistent with the spatial accumulation of anthocyanins. The correlation analysis of PlACLB2 expression pattern, acetyl-CoA content, and anthocyanin accumulation revealed that PlACLB2 was positively correlated with the acetyl-CoA and anthocyanin contents with correlation coefficients of 0.82 and 0.80. Moreover, multiple sequence alignment identified two typical conserved domains in PlACLB2, and phylogenetic analysis clustered PlACLB2 into the ACLB clade. PlACLB2 was localized in the nucleus and cytoplasm. On the one hand, silencing PlACLB2 in P. lactiflora red outer-petal resulted in lighter petal color and decreased acetyl-CoA accumulation, and quantitative analysis detected that PlACLB2-silenced petals lost more anthocyanins than the control groups with a decrease of 31.0%, and the main pigment component cyanidin-3,5-O-diglucoside was reduced by 31.9%. On the other hand, overexpression of PlACLB2 significantly promoted red coloration, acetyl-CoA content, and anthocyanin accumulation in tobacco flowers. These results demonstrated that PlACLB2 promoted anthocyanin accumulation by increasing the abundance of its precursor substrate acetyl-CoA, thereby regulating the formation of the red petals in P. lactiflora.
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Affiliation(s)
- Yuting Luan
- College of Horticulture and Landscape Architecture, Yangzhou University, Yangzhou, China
| | - Zijie Chen
- College of Horticulture and Landscape Architecture, Yangzhou University, Yangzhou, China
| | - Xin Wang
- College of Horticulture and Landscape Architecture, Yangzhou University, Yangzhou, China
| | - Hechen Zhang
- Institute of Horticulture, Henan Academy of Agricultural Sciences, Zhengzhou, China
| | - Jun Tao
- College of Horticulture and Landscape Architecture, Yangzhou University, Yangzhou, China
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education of China, Yangzhou University, Yangzhou, China
| | - Daqiu Zhao
- College of Horticulture and Landscape Architecture, Yangzhou University, Yangzhou, China
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19
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Huang H, Gao X, Gao X, Zhang S, Zheng Y, Zhang N, Hong B, Zhao X, Gu Z. Flower color mutation, pink to orange, through CmGATA4 - CCD4a-5 module regulates carotenoids degradation in chrysanthemum. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2022; 322:111290. [PMID: 35753140 DOI: 10.1016/j.plantsci.2022.111290] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Revised: 04/11/2022] [Accepted: 04/14/2022] [Indexed: 06/15/2023]
Abstract
The carotenoids biosynthesis pathway in plants has been studied extensively, yet little is known about the regulatory mechanisms underlying this process, especially for ornamental horticulture plants. In this study, a natural variation of chrysanthemum with orange coloration was identified and compared with the wild type with pink coloration; the content and component of carotenoids were largely enriched in the mutant with orange coloration. CmCCD4a-5, the DNA sequence in both 'Pink yan' and the mutant, was identified and shown to function as a carotenoid degradation enzyme. Compared with 'Pink yan', the mutant shows lower expression level of CmCCD4a-5. Furthermore, CmGATA4 was found to have an opposite expression trend to CmCCD4a-5, and it could directly bind with the CmCCD4a-5 promoter. Taken together, this study demonstrates that CmGATA4 acts as a negative regulator of CmCCD4a-5 and, furthermore, low expression of CmCCD4a-5 resulted in carotenoid accumulation in the mutant.
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Affiliation(s)
- Hongfeng Huang
- Beijing Key Laboratory of Development and Quality Control of Ornamental Crops, Department of Ornamental Horticulture, China Agricultural University, Beijing 100193, China.
| | - Xuekai Gao
- Beijing Key Laboratory of Development and Quality Control of Ornamental Crops, Department of Ornamental Horticulture, China Agricultural University, Beijing 100193, China.
| | - Xiang Gao
- Key Laboratory of Molecular Epigenetics of MOE and Institute of Genetics & Cytology, Northeast Normal University, Changchun 130024, China.
| | - Shiqi Zhang
- Beijing Key Laboratory of Development and Quality Control of Ornamental Crops, Department of Ornamental Horticulture, China Agricultural University, Beijing 100193, China.
| | - Ying Zheng
- Beijing Key Laboratory of Development and Quality Control of Ornamental Crops, Department of Ornamental Horticulture, China Agricultural University, Beijing 100193, China.
| | - Ning Zhang
- Beijing Key Laboratory of Development and Quality Control of Ornamental Crops, Department of Ornamental Horticulture, China Agricultural University, Beijing 100193, China.
| | - Bo Hong
- Beijing Key Laboratory of Development and Quality Control of Ornamental Crops, Department of Ornamental Horticulture, China Agricultural University, Beijing 100193, China.
| | - Xin Zhao
- Beijing Key Laboratory of Development and Quality Control of Ornamental Crops, Department of Ornamental Horticulture, China Agricultural University, Beijing 100193, China; State Key Laboratory of Plant Physiology and Biochemistry, College of Biological Sciences, China Agricultural University, Beijing 100193, China.
| | - Zhaoyu Gu
- Beijing Key Laboratory of Development and Quality Control of Ornamental Crops, Department of Ornamental Horticulture, China Agricultural University, Beijing 100193, China.
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20
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Borghi M, Perez de Souza L, Tohge T, Mi J, Melandri G, Proost S, Martins MCM, Al-Babili S, Bouwmeester HJ, Fernie AR. High-energy-level metabolism and transport occur at the transition from closed to open flowers. PLANT PHYSIOLOGY 2022; 190:319-339. [PMID: 35640120 PMCID: PMC9434183 DOI: 10.1093/plphys/kiac253] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Accepted: 04/29/2022] [Indexed: 06/15/2023]
Abstract
During the maturation phase of flower development, the onset of anthesis visibly marks the transition from buds to open flowers, during which petals stretch out, nectar secretion commences, and pollination occurs. Analysis of the metabolic changes occurring during this developmental transition has primarily focused on specific classes of metabolites, such as pigments and scent emission, and far less on the whole network of primary and secondary metabolites. To investigate the metabolic changes occurring at anthesis, we performed multi-platform metabolomics alongside RNA sequencing in individual florets harvested from the main inflorescence of Arabidopsis (Arabidopsis thaliana) ecotype Col-0. To trace metabolic fluxes at the level of the whole inflorescence and individual florets, we further integrated these studies with radiolabeled experiments. These extensive analyses revealed high-energy-level metabolism and transport of carbohydrates and amino acids, supporting intense metabolic rearrangements occurring at the time of this floral transition. These comprehensive data are discussed in the context of our current understanding of the metabolic shifts underlying flower opening. We envision that this analysis will facilitate the introgression of floral metabolic traits promoting pollination in crop species for which a comprehensive knowledge of flower metabolism is still limited.
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Affiliation(s)
- Monica Borghi
- Department of Biology, Utah State University, Logan, Utah 84321-5305, USA
- Max Planck Institute of Molecular Plant Physiology, 14476 Potsdam, Germany
- Laboratory of Plant Physiology, Wageningen University and Research, Wageningen 6708 PB, The Netherlands
| | | | - Takayuki Tohge
- Max Planck Institute of Molecular Plant Physiology, 14476 Potsdam, Germany
- Nara Institute of Science and Technology, Nara 630-0192, Japan
| | - Jianing Mi
- The Bioactives Lab, Biological and Environmental Sciences and Engineering Division, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia
| | - Giovanni Melandri
- Laboratory of Plant Physiology, Wageningen University and Research, Wageningen 6708 PB, The Netherlands
- INRAE, University of Bordeaux, UMR BFP, Villenave d’Ornon 33140, France
| | - Sebastian Proost
- Max Planck Institute of Molecular Plant Physiology, 14476 Potsdam, Germany
- Laboratory of Molecular Bacteriology, Department of Microbiology and Immunology, Rega Institute, KU Leuven, Leuven, Belgium
- Center for Microbiology, VIB, Leuven 3000, Belgium
| | - Marina C M Martins
- Max Planck Institute of Molecular Plant Physiology, 14476 Potsdam, Germany
- In Press—Consultoria e Comunicação Científica, São Paulo 05089-030, Brazil
| | - Salim Al-Babili
- The Bioactives Lab, Biological and Environmental Sciences and Engineering Division, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia
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21
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Schilbert HM, Glover BJ. Analysis of flavonol regulator evolution in the Brassicaceae reveals MYB12, MYB111 and MYB21 duplications and MYB11 and MYB24 gene loss. BMC Genomics 2022; 23:604. [PMID: 35986242 PMCID: PMC9392221 DOI: 10.1186/s12864-022-08819-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2022] [Accepted: 08/03/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Flavonols are the largest subgroup of flavonoids, possessing multiple functions in plants including protection against ultraviolet radiation, antimicrobial activities, and flower pigmentation together with anthocyanins. They are of agronomical and economical importance because the major off-taste component in rapeseed protein isolates is a flavonol derivative, which limits rapeseed protein use for human consumption. Flavonol production in Arabidopsis thaliana is mainly regulated by the subgroup 7 (SG7) R2R3-MYB transcription factors MYB11, MYB12, and MYB111. Recently, the SG19 MYBs MYB21, MYB24, and MYB57 were shown to regulate flavonol accumulation in pollen and stamens. The members of each subgroup are closely related, showing gene redundancy and tissue-specific expression in A. thaliana. However, the evolution of these flavonol regulators inside the Brassicaceae, especially inside the Brassiceae, which include the rapeseed crop species, is not fully understood. RESULTS We studied the SG7 and SG19 MYBs in 44 species, including 31 species of the Brassicaceae, by phylogenetic analyses followed by synteny and gene expression analyses. Thereby we identified a deep MYB12 and MYB111 duplication inside the Brassicaceae, which likely occurred before the divergence of Brassiceae and Thelypodieae. These duplications of SG7 members were followed by the loss of MYB11 after the divergence of Eruca vesicaria from the remaining Brassiceae species. Similarly, MYB21 experienced duplication before the emergence of the Brassiceae tribe, where the gene loss of MYB24 is also proposed to have happened. The members of each subgroup revealed frequent overlapping spatio-temporal expression patterns in the Brassiceae member B. napus, which are assumed to compensate for the loss of MYB11 and MYB24 in the analysed tissues. CONCLUSIONS We identified a duplication of MYB12, MYB111, and MYB21 inside the Brassicaceae and MYB11 and MYB24 gene loss inside the tribe Brassiceae. We propose that polyploidization events have shaped the evolution of the flavonol regulators in the Brassicaceae, especially in the Brassiceae.
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Affiliation(s)
- Hanna M Schilbert
- Department of Plant Sciences, University of Cambridge, Cambridge, UK.
- Genetics and Genomics of Plants, CeBiTec & Faculty of Biology, Bielefeld University, Bielefeld, Germany.
| | - Beverley J Glover
- Department of Plant Sciences, University of Cambridge, Cambridge, UK
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22
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Systematic Analysis and Functional Characterization of R2R3-MYB Genes in Scutellaria baicalensis Georgi. Int J Mol Sci 2022; 23:ijms23169342. [PMID: 36012606 PMCID: PMC9408826 DOI: 10.3390/ijms23169342] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2022] [Revised: 08/10/2022] [Accepted: 08/13/2022] [Indexed: 11/26/2022] Open
Abstract
R2R3-MYB transcription factors participate in multiple critical biological processes, particularly as relates to the regulation of secondary metabolites. The dried root of Scutellaria baicalensis Georgi is a traditional Chinese medicine and possesses various bioactive attributes including anti-inflammation, anti-HIV, and anti-COVID-19 properties due to its flavonoids. In the current study, a total of 95 R2R3-MYB genes were identified in S. baicalensis and classified into 34 subgroups, as supported by similar exon–intron structures and conserved motifs. Among them, 93 R2R3-SbMYBs were mapped onto nine chromosomes. Collinear analysis revealed that segmental duplications were primarily responsible for driving the evolution and expansion of the R2R3-SbMYB gene family. Synteny analyses showed that the ortholog numbers of the R2R3-MYB genes between S. baicalensis and other dicotyledons had a higher proportion compared to that which is found from the monocotyledons. RNA-seq data indicated that the expression patterns of R2R3-SbMYBs in different tissues were different. Quantitative reverse transcriptase-PCR (qRT-PCR) analysis showed that 36 R2R3-SbMYBs from different subgroups exhibited specific expression profiles under various conditions, including hormone stimuli treatments (methyl jasmonate and abscisic acid) and abiotic stresses (drought and cold shock treatments). Further investigation revealed that SbMYB18/32/46/60/70/74 localized in the nucleus, and SbMYB18/32/60/70 possessed transcriptional activation activity, implying their potential roles in the regulatory mechanisms of various biological processes. This study provides a comprehensive understanding of the R2R3-SbMYBs gene family and lays the foundation for further investigation of their biological function.
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23
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Zhang Z, Liu Y, Yuan Q, Xiong C, Xu H, Hu B, Suo H, Yang S, Hou X, Yuan F, Pei Z, Dai X, Zou X, Liu F. The bHLH1-DTX35/DFR module regulates pollen fertility by promoting flavonoid biosynthesis in Capsicum annuum L. HORTICULTURE RESEARCH 2022; 9:uhac172. [PMID: 36238346 PMCID: PMC9552195 DOI: 10.1093/hr/uhac172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Accepted: 07/25/2022] [Indexed: 06/16/2023]
Abstract
High pollen fertility can ensure the yield and efficiency of breeding work, but factors that affect the fertility of pepper pollen have not been studied extensively. In this work, we screened the reduced pollen fertility 1 (rpf1) mutant of Capsicum annuum with reduced pollen fertility and yellow anthers from an EMS (ethyl methanesulfonate)-mutagenized pepper population. Through construction of an F 2 population followed by BSA (bulked segregant analysis) mapping and KASP genotyping, we identified CabHLH1 as a candidate gene for control of this trait. A G → A mutation at a splice acceptor site in CabHLH1 causes a frameshift mutation in the mutant, and the translated protein is terminated prematurely. Previous studies on CabHLH1 have focused on the regulation of flavonoid synthesis. Here, we found that CabHLH1 also has an important effect on pollen fertility. Pollen vigor, anther flavonoid content, and seed number were lower in CabHLH1-silenced pepper plants, whereas anther H2O2 and MDA (malondialdehyde) contents were higher. RNA-seq analyses showed that expression of the flavonoid synthesis genes DFR, ANS, and RT was significantly reduced in anthers of CabHLH1-silenced plants and rpf1 plants, as was the expression of DTX35, a gene related to pollen fertility and flavonoid transport. Yeast one-hybrid and dual-luciferase reporter assays showed that CabHLH1 can directly bind to the promoters of DTX35 and DFR and activate their expression. These results indicate that CabHLH1 regulates reactive oxygen species homeostasis by promoting the synthesis of anther flavonoids and acts as a positive regulator of pepper pollen fertility.
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Affiliation(s)
| | | | - Qiaoling Yuan
- Engineering Research Center of Education Ministry for Germplasm Innovation and Breeding New Varieties of Horticultural Crops, Key Laboratory for Vegetable Biology of Hunan Province, College of Horticulture, Hunan Agricultural University, Changsha 410125, China
| | - Cheng Xiong
- Engineering Research Center of Education Ministry for Germplasm Innovation and Breeding New Varieties of Horticultural Crops, Key Laboratory for Vegetable Biology of Hunan Province, College of Horticulture, Hunan Agricultural University, Changsha 410125, China
| | - Hao Xu
- Engineering Research Center of Education Ministry for Germplasm Innovation and Breeding New Varieties of Horticultural Crops, Key Laboratory for Vegetable Biology of Hunan Province, College of Horticulture, Hunan Agricultural University, Changsha 410125, China
| | - Bowen Hu
- Engineering Research Center of Education Ministry for Germplasm Innovation and Breeding New Varieties of Horticultural Crops, Key Laboratory for Vegetable Biology of Hunan Province, College of Horticulture, Hunan Agricultural University, Changsha 410125, China
| | - Huan Suo
- Engineering Research Center of Education Ministry for Germplasm Innovation and Breeding New Varieties of Horticultural Crops, Key Laboratory for Vegetable Biology of Hunan Province, College of Horticulture, Hunan Agricultural University, Changsha 410125, China
| | - Sha Yang
- Engineering Research Center of Education Ministry for Germplasm Innovation and Breeding New Varieties of Horticultural Crops, Key Laboratory for Vegetable Biology of Hunan Province, College of Horticulture, Hunan Agricultural University, Changsha 410125, China
| | - Xilin Hou
- College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China
| | - Fang Yuan
- Engineering Research Center of Education Ministry for Germplasm Innovation and Breeding New Varieties of Horticultural Crops, Key Laboratory for Vegetable Biology of Hunan Province, College of Horticulture, Hunan Agricultural University, Changsha 410125, China
| | - Zhenming Pei
- Engineering Research Center of Education Ministry for Germplasm Innovation and Breeding New Varieties of Horticultural Crops, Key Laboratory for Vegetable Biology of Hunan Province, College of Horticulture, Hunan Agricultural University, Changsha 410125, China
| | - Xiongze Dai
- Engineering Research Center of Education Ministry for Germplasm Innovation and Breeding New Varieties of Horticultural Crops, Key Laboratory for Vegetable Biology of Hunan Province, College of Horticulture, Hunan Agricultural University, Changsha 410125, China
| | - Xuexiao Zou
- Engineering Research Center of Education Ministry for Germplasm Innovation and Breeding New Varieties of Horticultural Crops, Key Laboratory for Vegetable Biology of Hunan Province, College of Horticulture, Hunan Agricultural University, Changsha 410125, China
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24
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Liu Y, Li C, Yan R, Yu R, Ji M, Chen F, Fan S, Meng J, Liu F, Zhou G, Tang X. Metabolome and transcriptome analyses of the flavonoid biosynthetic pathway for the efficient accumulation of anthocyanins and other flavonoids in a new duckweed variety (68-red). JOURNAL OF PLANT PHYSIOLOGY 2022; 275:153753. [PMID: 35760019 DOI: 10.1016/j.jplph.2022.153753] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Revised: 06/04/2022] [Accepted: 06/08/2022] [Indexed: 05/21/2023]
Abstract
Duckweed is a kind of aquatic plant with the characteristics of high nutritional value and medicinal benefits. However, most researches focused on the natural germplasms. The underlying metabolic pathway remains to be systematically elaborated in duckweed. In our laboratory, one reddish-purple mutant with high-flavonoids was screened from a mutant library of Spirodela polyrhiza 6068, named 68-red. The content of anthocyanins and proanthocyanidins in 68-red mutant increased by 563.47% and 231.19%, respectively, compared to wild type. It is interesting that cynaroside and orientin content were significantly increased, in contrast, apigetrin and vitexin were decreased in 68-red mutant. Considering this, metabolome and transcriptome were employed to explore the flavonoids biosynthetic pathway. Here, a total of 734 metabolites were identified in the wild type and 68-red mutant. Among which, cyanidin-3-O-glucoside, cyanidin-3-O-galactoside, pelargonidin-3-O-glucoside and pelargonidin-3-O-(6″-O-malonyl)glucoside were significantly accumulated, which were positively correlated with deep reddish-purple of 68-red mutant. In addition, proanthocyanidins (B1, B2, B3, B4, C1, C2), flavonoid and its glycosides (11 luteolin and its glycosides, 14 quercetin and its glycosides, 14 kaempferol and its glycosides, 2 apigenin glycosides) were significantly accumulated, 2 apigenin glycosides were down-regulated in 68-red mutant. The transcriptome data and qRT-PCR indicated that 16 enzyme genes in flavonoids biosynthetic pathway (PAL, C4H, CHSs, F3H, ANS, ANR, F3'Hs, DFRs, LAR, GT1, BZ1) were significantly up-regulated in 68-red mutant. Correlation analysis found that three copies of F3'H gene play important roles in the synthesis of anthocyanins, luteolin and apigenin glycosides. In conclusion, the 68-red mutant is a high quality germplasm resources for food and medical industry. Metabolome and transcriptome provide new insight for exploring the enzyme genes and functional metabolites in duckweed.
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Affiliation(s)
- Yu Liu
- College of Landscape Architecture and Forestry, Qingdao Agricultural University, Qingdao, Shandong, 266109, China
| | - Chuantong Li
- College of Resources and Environment, Qingdao Agricultural University, Qingdao, China
| | - Ruiting Yan
- College of Resources and Environment, Qingdao Agricultural University, Qingdao, China
| | - Ruikang Yu
- College of Resources and Environment, Qingdao Agricultural University, Qingdao, China
| | - Meijing Ji
- College of Resources and Environment, Qingdao Agricultural University, Qingdao, China
| | - Fei Chen
- College of Resources and Environment, Qingdao Agricultural University, Qingdao, China
| | - Shusheng Fan
- College of Resources and Environment, Qingdao Agricultural University, Qingdao, China
| | - Jie Meng
- College of Landscape Architecture and Forestry, Qingdao Agricultural University, Qingdao, Shandong, 266109, China
| | - Fumei Liu
- College of Landscape Architecture and Forestry, Qingdao Agricultural University, Qingdao, Shandong, 266109, China
| | - Gongke Zhou
- College of Landscape Architecture and Forestry, Qingdao Agricultural University, Qingdao, Shandong, 266109, China.
| | - Xianfeng Tang
- Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, China.
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25
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Zhang D, Wang S, Lin L, Zhang J, Cui M, Wang S, Zhao X, Dong J, Long Y, Xing Z. Integrative Analysis of Metabolome and Transcriptome Reveals the Mechanism of Flavonoid Biosynthesis in Lithocarpus polystachyus Rehd. ACS OMEGA 2022; 7:19437-19453. [PMID: 35722012 PMCID: PMC9202069 DOI: 10.1021/acsomega.2c01125] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Accepted: 05/23/2022] [Indexed: 05/28/2023]
Abstract
Lithocarpus polystachyus Rehd has received great attention because of its pharmacological activities, such as inhibiting oxidation and lowering blood glucose and blood pressure, and flavonoids are one of its main pharmacodynamic components. It is important to understand the mechanisms of the flavonoid biosynthetic pathway of L. polystachyus, but the regulation of flavonoid biosynthesis is still unclear. In this study, differentially expressed genes and differentially accumulated metabolites in L. polystachyus were studied by integrating transcriptomics and metabolomics technologies. We confirmed the key genes involved in the flavonoid biosynthesis of L. polystachyus, including LpPAL3, LpCHS1, LpCHS2, LpCHI2, and LpF3H, which had consistent expression patterns with their upstream and downstream metabolites, and there is a significantly positive correlation between them. Compared to mature leaves, stems and young leaves are higher in the expression levels of key structural genes. We deduced that the MYB and bHLH transcription factors regulated the biosynthesis of different flavonoid metabolites and their regulatory patterns. Among them, LpMYB2, LpMYB20, LpMYB54, LpMYB12, and LpWD40-113 positively regulated the biosynthesis of flavones and flavanones. This discovery preliminarily revealed the pathways and key genes of flavonoid biosynthesis in L. polystachyus, which provided a reference for further study on flavonoid biosynthesis.
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Affiliation(s)
- Duoduo Zhang
- College
of Life Sciences, North China University
of Science and Technology, Tangshan 063210, China
| | - Shuqing Wang
- Hospital
of North China University of Science and Technology, Tangshan 063210, China
| | - Limei Lin
- College
of Life Sciences, North China University
of Science and Technology, Tangshan 063210, China
| | - Jie Zhang
- College
of Life Sciences, North China University
of Science and Technology, Tangshan 063210, China
| | - Minghui Cui
- College
of Life Sciences, North China University
of Science and Technology, Tangshan 063210, China
| | - Shuo Wang
- College
of Life Sciences, North China University
of Science and Technology, Tangshan 063210, China
| | - Xuelei Zhao
- College
of Life Sciences, North China University
of Science and Technology, Tangshan 063210, China
| | - Jing Dong
- College
of Life Sciences, North China University
of Science and Technology, Tangshan 063210, China
| | - Yuehong Long
- College
of Life Sciences, North China University
of Science and Technology, Tangshan 063210, China
| | - Zhaobin Xing
- College
of Life Sciences, North China University
of Science and Technology, Tangshan 063210, China
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26
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Wong DCJ, Perkins J, Peakall R. Anthocyanin and Flavonol Glycoside Metabolic Pathways Underpin Floral Color Mimicry and Contrast in a Sexually Deceptive Orchid. FRONTIERS IN PLANT SCIENCE 2022; 13:860997. [PMID: 35401591 PMCID: PMC8983864 DOI: 10.3389/fpls.2022.860997] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Accepted: 02/17/2022] [Indexed: 06/10/2023]
Abstract
Sexually deceptive plants secure pollination by luring specific male insects as pollinators using a combination of olfactory, visual, and morphological mimicry. Flower color is a key component to this attraction, but its chemical and genetic basis remains poorly understood. Chiloglottis trapeziformis is a sexually deceptive orchid which has predominantly dull green-red flowers except for the central black callus projecting from the labellum lamina. The callus mimics the female of the pollinator and the stark color contrast between the black callus and dull green or red lamina is thought to enhance the visibility of the mimic. The goal of this study was to investigate the chemical composition and genetic regulation of temporal and spatial color patterns leading to visual mimicry, by integrating targeted metabolite profiling and transcriptomic analysis. Even at the very young bud stage, high levels of anthocyanins were detected in the dark callus, with peak accumulation by the mature bud stage. In contrast, anthocyanin levels in the lamina peaked as the buds opened and became reddish-green. Coordinated upregulation of multiple genes, including dihydroflavonol reductase and leucoanthocyanidin dioxygenase, and the downregulation of flavonol synthase genes (FLS) in the callus at the very young bud stage underpins the initial high anthocyanin levels. Conversely, within the lamina, upregulated FLS genes promote flavonol glycoside over anthocyanin production, with the downstream upregulation of flavonoid O-methyltransferase genes further contributing to the accumulation of methylated flavonol glycosides, whose levels peaked in the mature bud stage. Finally, the peak anthocyanin content of the reddish-green lamina of the open flower is underpinned by small increases in gene expression levels and/or differential upregulation in the lamina in select anthocyanin genes while FLS patterns showed little change. Differential expression of candidate genes involved in specific transport, vacuolar acidification, and photosynthetic pathways may also assist in maintaining the distinct callus and contrasting lamina color from the earliest bud stage through to the mature flower. Our findings highlight that flower color in this sexually deceptive orchid is achieved by complex tissue-specific coordinated regulation of genes and biochemical pathways across multiple developmental stages.
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Wu Y, Wen J, Xia Y, Zhang L, Du H. Evolution and functional diversification of R2R3-MYB transcription factors in plants. HORTICULTURE RESEARCH 2022; 9:uhac058. [PMID: 35591925 PMCID: PMC9113232 DOI: 10.1093/hr/uhac058] [Citation(s) in RCA: 58] [Impact Index Per Article: 29.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Accepted: 02/24/2022] [Indexed: 05/31/2023]
Abstract
R2R3-MYB genes (R2R3-MYBs) form one of the largest transcription factor gene families in the plant kingdom, with substantial structural and functional diversity. However, the evolutionary processes leading to this amazing functional diversity have not yet been clearly established. Recently developed genomic and classical molecular technologies have provided detailed insights into the evolutionary relationships and functions of plant R2R3-MYBs. Here, we review recent genome-level and functional analyses of plant R2R3-MYBs, with an emphasis on their evolution and functional diversification. In land plants, this gene family underwent a large expansion by whole genome duplications and small-scale duplications. Along with this population explosion, a series of functionally conserved or lineage-specific subfamilies/groups arose with roles in three major plant-specific biological processes: development and cell differentiation, specialized metabolism, and biotic and abiotic stresses. The rapid expansion and functional diversification of plant R2R3-MYBs are highly consistent with the increasing complexity of angiosperms. In particular, recently derived R2R3-MYBs with three highly homologous intron patterns (a, b, and c) are disproportionately related to specialized metabolism and have become the predominant subfamilies in land plant genomes. The evolution of plant R2R3-MYBs is an active area of research, and further studies are expected to improve our understanding of the evolution and functional diversification of this gene family.
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Affiliation(s)
- Yun Wu
- Department of Landscape Architecture, School of Civil Engineering and Architecture, Zhejiang Sci-Tech University, Hangzhou, 310018, China
- Genomics and Genetic Engineering Laboratory of Ornamental Plants, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, 310058, China
| | - Jing Wen
- College of Agronomy and Biotechnology, Southwest University, Chongqing, 400716, China
| | - Yiping Xia
- Genomics and Genetic Engineering Laboratory of Ornamental Plants, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, 310058, China
| | - Liangsheng Zhang
- Genomics and Genetic Engineering Laboratory of Ornamental Plants, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, 310058, China
| | - Hai Du
- College of Agronomy and Biotechnology, Southwest University, Chongqing, 400716, China
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28
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Xie DL, Zheng XL, Zhou CY, Kanwar MK, Zhou J. Functions of Redox Signaling in Pollen Development and Stress Response. Antioxidants (Basel) 2022; 11:antiox11020287. [PMID: 35204170 PMCID: PMC8868224 DOI: 10.3390/antiox11020287] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 01/28/2022] [Accepted: 01/29/2022] [Indexed: 02/01/2023] Open
Abstract
Cellular redox homeostasis is crucial for normal plant growth and development. Each developmental stage of plants has a specific redox mode and is maintained by various environmental cues, oxidants, and antioxidants. Reactive oxygen species (ROS) and reactive nitrogen species are the chief oxidants in plant cells and participate in cell signal transduction and redox balance. The production and removal of oxidants are in a dynamic balance, which is necessary for plant growth. Especially during reproductive development, pollen development depends on ROS-mediated tapetal programmed cell death to provide nutrients and other essential substances. The deviation of the redox state in any period will lead to microspore abortion and pollen sterility. Meanwhile, pollens are highly sensitive to environmental stress, in particular to cell oxidative burst due to its peculiar structure and function. In this regard, plants have evolved a series of complex mechanisms to deal with redox imbalance and oxidative stress damage. This review summarizes the functions of the main redox components in different stages of pollen development, and highlights various redox protection mechanisms of pollen in response to environmental stimuli. In continuation, we also discuss the potential applications of plant growth regulators and antioxidants for improving pollen vigor and fertility in sustaining better agriculture practices.
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Affiliation(s)
- Dong-Ling Xie
- Department of Horticulture, Zhejiang University, Yuhangtang Road 866, Hangzhou 310058, China; (D.-L.X.); (X.-L.Z.); (C.-Y.Z.); (M.K.K.)
| | - Xue-Lian Zheng
- Department of Horticulture, Zhejiang University, Yuhangtang Road 866, Hangzhou 310058, China; (D.-L.X.); (X.-L.Z.); (C.-Y.Z.); (M.K.K.)
| | - Can-Yu Zhou
- Department of Horticulture, Zhejiang University, Yuhangtang Road 866, Hangzhou 310058, China; (D.-L.X.); (X.-L.Z.); (C.-Y.Z.); (M.K.K.)
| | - Mukesh Kumar Kanwar
- Department of Horticulture, Zhejiang University, Yuhangtang Road 866, Hangzhou 310058, China; (D.-L.X.); (X.-L.Z.); (C.-Y.Z.); (M.K.K.)
| | - Jie Zhou
- Department of Horticulture, Zhejiang University, Yuhangtang Road 866, Hangzhou 310058, China; (D.-L.X.); (X.-L.Z.); (C.-Y.Z.); (M.K.K.)
- Key Laboratory of Horticultural Plants Growth, Development and Quality Improvement, Agricultural Ministry of China, Yuhangtang Road 866, Hangzhou 310058, China
- Shandong (Linyi) Institute of Modern Agriculture, Zhejiang University, Linyi 276000, China
- Correspondence:
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Chen Q, Zhang X, Fang Y, Wang B, Xu S, Zhao K, Zhang J, Fang J. Genome-Wide Identification and Expression Analysis of the R2R3-MYB Transcription Factor Family Revealed Their Potential Roles in the Flowering Process in Longan ( Dimocarpus longan). FRONTIERS IN PLANT SCIENCE 2022; 13:820439. [PMID: 35401601 PMCID: PMC8990856 DOI: 10.3389/fpls.2022.820439] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Accepted: 03/02/2022] [Indexed: 05/10/2023]
Abstract
Longan (Dimocarpus longan Lour.) is a productive fruit crop with high nutritional and medical value in tropical and subtropical regions. The MYB gene family is one of the most widespread plant transcription factor (TF) families participating in the flowering regulation. However, little is known about the MYB TFs involved in the flowering process in longan and its regulatory network. In this study, a total of 119 DlR2R3-MYB genes were identified in the longan genome and were phylogenetically grouped into 28 subgroups. The groupings were supported by highly conserved gene structures and motif composition of DlR2R3-MYB genes in each subgroup. Collinearity analysis demonstrated that segmental replications played a more crucial role in the expansion of the DlR2R3-MYB gene family compared to tandem duplications, and all tandem/segmental duplication gene pairs have evolved under purifying selection. Interspecies synteny analysis among longan and five representative species implied the occurrence of gene duplication events was one of the reasons contributing to functional differentiation among species. RNA-seq data from various tissues showed DlR2R3-MYB genes displayed tissue-preferential expression patterns. The pathway of flower development was enriched with six DlR2R3-MYB genes. Cis-acting element prediction revealed the putative functions of DlR2R3-MYB genes were related to the plant development, phytohormones, and environmental stresses. Notably, the orthologous counterparts between Arabidopsis and longan R2R3-MYB members tended to play conserved roles in the flowering regulation and stress responses. Transcriptome profiling on off-season flower induction (FI) by KClO3 indicated two up-regulated and four down-regulated DlR2R3-MYB genes involved in the response to KClO3 treatment compared with control groups. Additionally, qRT-PCR confirmed certain genes exhibited high expression in flowers/flower buds. Subcellular localization experiments revealed that three predicted flowering-associated MYB proteins were localized in the nucleus. Future functional studies on these potential candidate genes involved in the flowering development could further the understanding of the flowering regulation mechanism.
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Affiliation(s)
- Qinchang Chen
- College of Life Sciences, Fujian Normal University, Fuzhou, China
- Center of Engineering Technology Research for Microalgae Germplasm Improvement of Fujian, Southern Institute of Oceanography, Fujian Normal University, Fuzhou, China
| | - Xiaodan Zhang
- Department of Plant Biology, University of Illinois at Urbana-Champaign, Urbana, IL, United States
| | - Yaxue Fang
- Center for Genomics and Biotechnology, Fujian Provincial Key Laboratory of Haixia Applied Plant Systems Biology, Key Laboratory of Genetics, Breeding and Multiple Utilization of Crops, Ministry of Education, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Baiyu Wang
- Center for Genomics and Biotechnology, Fujian Provincial Key Laboratory of Haixia Applied Plant Systems Biology, Key Laboratory of Genetics, Breeding and Multiple Utilization of Crops, Ministry of Education, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Shaosi Xu
- College of Life Sciences, Fujian Normal University, Fuzhou, China
- Center of Engineering Technology Research for Microalgae Germplasm Improvement of Fujian, Southern Institute of Oceanography, Fujian Normal University, Fuzhou, China
| | - Kai Zhao
- College of Life Sciences, Fujian Normal University, Fuzhou, China
- Center of Engineering Technology Research for Microalgae Germplasm Improvement of Fujian, Southern Institute of Oceanography, Fujian Normal University, Fuzhou, China
| | - Jisen Zhang
- Center for Genomics and Biotechnology, Fujian Provincial Key Laboratory of Haixia Applied Plant Systems Biology, Key Laboratory of Genetics, Breeding and Multiple Utilization of Crops, Ministry of Education, Fujian Agriculture and Forestry University, Fuzhou, China
- Jisen Zhang,
| | - Jingping Fang
- College of Life Sciences, Fujian Normal University, Fuzhou, China
- Center of Engineering Technology Research for Microalgae Germplasm Improvement of Fujian, Southern Institute of Oceanography, Fujian Normal University, Fuzhou, China
- *Correspondence: Jingping Fang,
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30
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Zhu J, Guo X, Li X, Tang D. Composition of Flavonoids in the Petals of Freesia and Prediction of Four Novel Transcription Factors Involving in Freesia Flavonoid Pathway. FRONTIERS IN PLANT SCIENCE 2021; 12:756300. [PMID: 34868147 PMCID: PMC8634401 DOI: 10.3389/fpls.2021.756300] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Accepted: 10/18/2021] [Indexed: 06/13/2023]
Abstract
Freesia hybrida is rich in flower colors with beautiful flower shapes and pleasant aroma. Flavonoids are vital to the color formation of its flowers. In this study, five Freesia cultivars with different flower colors were used to study on the level of accumulation of their flavonoids and expression of flavonoid-related genes and further explore new novel transcription factor (TF). Ultra-high-performance liquid chromatography and VION ion mobility quadrupole time-of-flight mass spectrometer (UPLC-Q-TOF-MS) were used to determine the flavonoids. Combined with transcriptome sequencing technology, the molecular mechanism of the flavonoid metabolism difference in Freesia was revealed. A total of 10 anthoxanthin components and 12 anthocyanin components were detected using UPLC-Q-TOF-MS. All six common anthocyanin aglycones in high plants, including cyanidin, delphinidin, petunidin, peonidin, malvidin, and pelargonidin, were detected in Freesia at first time in this study. In orange, yellow, and white cultivars, anthoxanthins gradually decreased with the opening of the petals, while in red and purple cultivars, anthoxanthins first increased and then decreased. No anthocyanin was detected in yellow and white cultivars, while anthocyanins increased with the opening of the petals and reached their maximum at the flowering stage (S3) in other three cultivars. The correlation analysis revealed that the color of Freesia petals was closely related to the composition and content of anthoxanthins and anthocyanins. Petals of five cultivars at S3 were then selected for transcriptome sequencing by using the Illumina Hiseq 4000 platform, and a total of 100,539 unigenes were obtained. There were totally 5,162 differentially expressed genes (DEGs) when the four colored cultivars were compared with the white cultivar at S3. Comparing all DEGs with gene ontology (GO), KEGG, and Pfam databases, it was found that the genes involved in the flavonoid biosynthesis pathway were significantly different. In addition, AP2, WRKY, and bHLH TF families ranked the top three among all differently expressed TFs in all DEGs. Quantitative real-time PCR (qRT-PCR) technology was used to analyze the expression patterns of the structural genes of flavonoid biosynthesis pathway in Freesia. The results showed that metabolic process was affected significantly by structural genes in this pathway, such as CHS1, CHI2, DFR1, ANS1, 3GT1, and FLS1. Cluster analysis was performed by using all annotated WRKY and AP2 TFs and the above structural genes based on their relatively expression. Four novel candidate TFs of WRKY and AP2 family were screened. Their spatiotemporal expression patterns revealed that these four novel TFs may participate in the regulation of the flavonoid biosynthesis, thus controlling its color formation in Freesia petals.
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Affiliation(s)
- Jiayi Zhu
- School of Design, Shanghai Jiao Tong University, Shanghai, China
| | - Xueying Guo
- School of Design, Shanghai Jiao Tong University, Shanghai, China
| | - Xin Li
- Instrumental Analysis Center, Shanghai Jiao Tong University, Shanghai, China
| | - Dongqin Tang
- School of Design, Shanghai Jiao Tong University, Shanghai, China
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31
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Schilbert HM, Schöne M, Baier T, Busche M, Viehöver P, Weisshaar B, Holtgräwe D. Characterization of the Brassica napus Flavonol Synthase Gene Family Reveals Bifunctional Flavonol Synthases. FRONTIERS IN PLANT SCIENCE 2021; 12:733762. [PMID: 34721462 PMCID: PMC8548573 DOI: 10.3389/fpls.2021.733762] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Accepted: 09/21/2021] [Indexed: 06/13/2023]
Abstract
Flavonol synthase (FLS) is a key enzyme for the formation of flavonols, which are a subclass of the flavonoids. FLS catalyzes the conversion of dihydroflavonols to flavonols. The enzyme belongs to the 2-oxoglutarate-dependent dioxygenases (2-ODD) superfamily. We characterized the FLS gene family of Brassica napus that covers 13 genes, based on the genome sequence of the B. napus cultivar Express 617. The goal was to unravel which BnaFLS genes are relevant for seed flavonol accumulation in the amphidiploid species B. napus. Two BnaFLS1 homeologs were identified and shown to encode bifunctional enzymes. Both exhibit FLS activity as well as flavanone 3-hydroxylase (F3H) activity, which was demonstrated in vivo and in planta. BnaFLS1-1 and -2 are capable of converting flavanones into dihydroflavonols and further into flavonols. Analysis of spatio-temporal transcription patterns revealed similar expression profiles of BnaFLS1 genes. Both are mainly expressed in reproductive organs and co-expressed with the genes encoding early steps of flavonoid biosynthesis. Our results provide novel insights into flavonol biosynthesis in B. napus and contribute information for breeding targets with the aim to modify the flavonol content in rapeseed.
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Affiliation(s)
- Hanna Marie Schilbert
- Genetics and Genomics of Plants, CeBiTec and Faculty of Biology, Bielefeld University, Bielefeld, Germany
| | - Maximilian Schöne
- Genetics and Genomics of Plants, CeBiTec and Faculty of Biology, Bielefeld University, Bielefeld, Germany
| | - Thomas Baier
- Algae Biotechnology and Bioenergy, CeBiTec and Faculty of Biology, Bielefeld University, Bielefeld, Germany
| | - Mareike Busche
- Genetics and Genomics of Plants, CeBiTec and Faculty of Biology, Bielefeld University, Bielefeld, Germany
| | - Prisca Viehöver
- Genetics and Genomics of Plants, CeBiTec and Faculty of Biology, Bielefeld University, Bielefeld, Germany
| | - Bernd Weisshaar
- Genetics and Genomics of Plants, CeBiTec and Faculty of Biology, Bielefeld University, Bielefeld, Germany
| | - Daniela Holtgräwe
- Genetics and Genomics of Plants, CeBiTec and Faculty of Biology, Bielefeld University, Bielefeld, Germany
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32
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Busche M, Acatay C, Martens S, Weisshaar B, Stracke R. Functional Characterisation of Banana ( Musa spp.) 2-Oxoglutarate-Dependent Dioxygenases Involved in Flavonoid Biosynthesis. FRONTIERS IN PLANT SCIENCE 2021; 12:701780. [PMID: 34484266 PMCID: PMC8415913 DOI: 10.3389/fpls.2021.701780] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Accepted: 07/20/2021] [Indexed: 05/27/2023]
Abstract
Bananas (Musa) are non-grass, monocotyledonous, perennial plants that are well known for their edible fruits. Their cultivation provides food security and employment opportunities in many countries. Banana fruits contain high levels of minerals and phytochemicals, including flavonoids, which are beneficial for human nutrition. To broaden the knowledge on flavonoid biosynthesis in this major crop plant, we aimed to identify and functionally characterise selected structural genes encoding 2-oxoglutarate-dependent dioxygenases, involved in the formation of the flavonoid aglycon. Musa candidates genes predicted to encode flavanone 3-hydroxylase (F3H), flavonol synthase (FLS) and anthocyanidin synthase (ANS) were assayed. Enzymatic functionalities of the recombinant proteins were confirmed in vivo using bioconversion assays. Moreover, transgenic analyses in corresponding Arabidopsis thaliana mutants showed that MusaF3H, MusaFLS and MusaANS were able to complement the respective loss-of-function phenotypes, thus verifying functionality of the enzymes in planta. Knowledge gained from this work provides a new aspect for further research towards genetic engineering of flavonoid biosynthesis in banana fruits to increase their antioxidant activity and nutritional value.
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Affiliation(s)
- Mareike Busche
- Genetics and Genomics of Plants, Faculty of Biology, Bielefeld University, Bielefeld, Germany
| | - Christopher Acatay
- Genetics and Genomics of Plants, Faculty of Biology, Bielefeld University, Bielefeld, Germany
| | - Stefan Martens
- Fondazione Edmund Mach, Research and Innovation Centre, San Michele All’ Adige, Italy
| | - Bernd Weisshaar
- Genetics and Genomics of Plants, Faculty of Biology, Bielefeld University, Bielefeld, Germany
| | - Ralf Stracke
- Genetics and Genomics of Plants, Faculty of Biology, Bielefeld University, Bielefeld, Germany
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33
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Gao R, Han T, Xun H, Zeng X, Li P, Li Y, Wang Y, Shao Y, Cheng X, Feng X, Zhao J, Wang L, Gao X. MYB transcription factors GmMYBA2 and GmMYBR function in a feedback loop to control pigmentation of seed coat in soybean. JOURNAL OF EXPERIMENTAL BOTANY 2021; 72:4401-4418. [PMID: 33825878 DOI: 10.1093/jxb/erab152] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Accepted: 04/02/2021] [Indexed: 06/12/2023]
Abstract
Soybean has undergone extensive selection pressures for seed nutrient composition and seed color during domestication, but the major genetic loci controlling seed coat color have not been completely understood, and the transcriptional regulation relationship among the loci remains elusive. Here, two major regulators, GmMYBA2 and GmMYBR, were functionally characterized as an anthocyanin activator and repressor, respectively. Ectopic expression of GmMYBA2 in soybean hairy roots conferred the enhanced accumulation of delphinidin and cyanidin types of anthocyanins in W1t and w1T backgrounds, respectively, through activating anthocyanin biosynthetic genes in the reported loci. The seed coat pigmentation of GmMYBA2-overexpressing transgenic plants in the W1 background mimicked the imperfect black phenotype (W1/w1, i, R, t), suggesting that GmMYBA2 was responsible for the R locus. Molecular and biochemical analysis showed that GmMYBA2 interacted with GmTT8a to directly activate anthocyanin biosynthetic genes. GmMYBA2 and GmMYBR might form a feedback loop to fine-tune seed coat coloration, which was confirmed in transgenic soybeans. Both GmTT8a and GmMYBR that were activated by GmMYBA2 in turn enhanced and obstructed the formation of the GmMYBA2-GmTT8a module, respectively. The results revealed the sophisticated regulatory network underlying the soybean seed coat pigmentation loci and shed light on the understanding of the seed coat coloration and other seed inclusions.
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Affiliation(s)
- Ruifang Gao
- Key Laboratory of Molecular Epigenetics of MOE and Institute of Genetics & Cytology, Northeast Normal University, Changchun, China
| | - Taotao Han
- Key Laboratory of Molecular Epigenetics of MOE and Institute of Genetics & Cytology, Northeast Normal University, Changchun, China
| | - Hongwei Xun
- Jilin Provincial Key Laboratory of Agricultural Biotechnology, Agro-Biotechnology Institute, Jilin Academy of Agricultural Sciences, Changchun, China
| | - Xiangsheng Zeng
- State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, Hefei, China
| | - Penghui Li
- State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, Hefei, China
| | - Yueqing Li
- Key Laboratory of Molecular Epigenetics of MOE and Institute of Genetics & Cytology, Northeast Normal University, Changchun, China
| | - Yanan Wang
- Key Laboratory of Molecular Epigenetics of MOE and Institute of Genetics & Cytology, Northeast Normal University, Changchun, China
| | - Yan Shao
- Key Laboratory of Molecular Epigenetics of MOE and Institute of Genetics & Cytology, Northeast Normal University, Changchun, China
| | - Xin Cheng
- Key Laboratory of Molecular Epigenetics of MOE and Institute of Genetics & Cytology, Northeast Normal University, Changchun, China
| | - Xianzhong Feng
- Key Laboratory of Soybean Molecular Design Breeding, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, China
| | - Jian Zhao
- State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, Hefei, China
| | - Li Wang
- Key Laboratory of Molecular Epigenetics of MOE and Institute of Genetics & Cytology, Northeast Normal University, Changchun, China
| | - Xiang Gao
- Key Laboratory of Molecular Epigenetics of MOE and Institute of Genetics & Cytology, Northeast Normal University, Changchun, China
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34
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Zhang X, He Y, Li L, Liu H, Hong G. Involvement of the R2R3-MYB transcription factor MYB21 and its homologs in regulating flavonol accumulation in Arabidopsis stamen. JOURNAL OF EXPERIMENTAL BOTANY 2021; 72:4319-4332. [PMID: 33831169 PMCID: PMC8163065 DOI: 10.1093/jxb/erab156] [Citation(s) in RCA: 44] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2021] [Accepted: 04/03/2021] [Indexed: 05/19/2023]
Abstract
Commonly found flavonols in plants are synthesized from dihydroflavonols by flavonol synthase (FLS). The genome of Arabidopsis thaliana contains six FLS genes, among which FLS1 encodes a functional enzyme. Previous work has demonstrated that the R2R3-MYB subgroup 7 transcription factors MYB11, MYB12, and MYB111 redundantly regulate flavonol biosynthesis. However, flavonol accumulation in pollen grains was unaffected in the myb11myb12myb111 triple mutant. Here we show that MYB21 and its homologs MYB24 and MYB57, which belong to subgroup 19, promote flavonol biosynthesis through regulation of FLS1 gene expression. We used a combination of genetic and metabolite analysis to identify the role of MYB21 in regulating flavonol biosynthesis through direct binding to the GARE cis-element in the FLS1 promoter. Treatment with kaempferol or overexpression of FLS1 rescued stamen defects in the myb21 mutant. We also observed that excess reactive oxygen species (ROS) accumulated in the myb21 stamen, and that treatment with the ROS inhibitor diphenyleneiodonium chloride partly rescued the reduced fertility of the myb21 mutant. Furthermore, drought increased ROS abundance and impaired fertility in myb21, myb21myb24myb57, and chs, but not in the wild type or myb11myb12myb111, suggesting that pollen-specific flavonol accumulation contributes to drought-induced male fertility by ROS scavenging in Arabidopsis.
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Affiliation(s)
- Xueying Zhang
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Institute of Virology and Biotechnology, Zhejiang Academy of Agricultural Sciences, 198 Shiqiao Road, Hangzhou 310021, China
| | - Yuqing He
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Institute of Virology and Biotechnology, Zhejiang Academy of Agricultural Sciences, 198 Shiqiao Road, Hangzhou 310021, China
| | - Linying Li
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Institute of Virology and Biotechnology, Zhejiang Academy of Agricultural Sciences, 198 Shiqiao Road, Hangzhou 310021, China
| | - Hongru Liu
- National Key Laboratory of Plant Molecular Genetics and National Plant Gene Research Center, CAS Center for Excellence in Molecular Plant Sciences, Shanghai Institute of Plant Physiology and Ecology, Shanghai 200032, China
| | - Gaojie Hong
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Institute of Virology and Biotechnology, Zhejiang Academy of Agricultural Sciences, 198 Shiqiao Road, Hangzhou 310021, China
- Correspondence:
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35
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Naik J, Rajput R, Pucker B, Stracke R, Pandey A. The R2R3-MYB transcription factor MtMYB134 orchestrates flavonol biosynthesis in Medicago truncatula. PLANT MOLECULAR BIOLOGY 2021; 106:157-172. [PMID: 33704646 DOI: 10.1007/s11103-021-01135-x] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Accepted: 02/25/2021] [Indexed: 05/24/2023]
Abstract
Our results provide insights into the flavonol biosynthesis regulation of M. truncatula. The R2R3-MYB transcription factor MtMYB134 emerged as tool to improve the flavonol biosynthesis. Flavonols are plant specialized metabolites with vital roles in plant development and defense and are known as diet compound beneficial to human health. In leguminous plants, the regulatory proteins involved in flavonol biosynthesis are not well characterized. Using a homology-based approach, three R2R3-MYB transcription factor encoding genes have been identified in the Medicago truncatula reference genome sequence. The gene encoding a protein with highest similarity to known flavonol regulators, MtMYB134, was chosen for further experiments and was characterized as a functional flavonol regulator from M. truncatula. MtMYB134 expression levels are correlated with the expression of MtFLS2, encoding a key enzyme of flavonol biosynthesis, and with flavonol metabolite content. MtMYB134 was shown to activate the promoters of the A. thaliana flavonol biosynthesis genes AtCHS and AtFLS1 in Arabidopsis protoplasts in a transactivation assay and to interact with the Medicago promoters of MtCHS2 and MtFLS2 in yeast 1-hybrid assays. To ascertain the functional aspect of the identified transcription factor, we developed a sextuple mutant, which is defective in anthocyanin and flavonol biosynthesis. Ectopic expression of MtMYB134 in a multiple myb A. thaliana mutant restored flavonol biosynthesis. Furthermore, overexpression of MtMYB134 in hairy roots of M. truncatula enhanced the biosynthesis of various flavonol derivatives. Taken together, our results provide insight into the understanding of flavonol biosynthesis regulation in M. truncatula and provides MtMYB134 as tool for genetic manipulation to improve flavonol synthesis.
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Affiliation(s)
- Jogindra Naik
- National Institute of Plant Genome Research, Aruna Asaf Ali Marg, New Delhi, 110067, India
| | - Ruchika Rajput
- National Institute of Plant Genome Research, Aruna Asaf Ali Marg, New Delhi, 110067, India
| | - Boas Pucker
- Chair of Genetics and Genomics of Plants, Bielefeld University, 33615, Bielefeld, Germany
- Evolution and Diversity, Department of Plant Sciences, University of Cambridge, CB2 3EA, Cambridge, UK
| | - Ralf Stracke
- Chair of Genetics and Genomics of Plants, Bielefeld University, 33615, Bielefeld, Germany
| | - Ashutosh Pandey
- National Institute of Plant Genome Research, Aruna Asaf Ali Marg, New Delhi, 110067, India.
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Huo Y, Zhang B, Chen L, Zhang J, Zhang X, Zhu C. Isolation and Functional Characterization of the Promoters of Miltiradiene Synthase Genes, TwTPS27a and TwTPS27b, and Interaction Analysis with the Transcription Factor TwTGA1 from Tripterygium wilfordii. PLANTS 2021; 10:plants10020418. [PMID: 33672407 PMCID: PMC7926782 DOI: 10.3390/plants10020418] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Revised: 02/19/2021] [Accepted: 02/20/2021] [Indexed: 12/19/2022]
Abstract
Miltiradiene synthase (MS) genes, TwTPS27a and TwTPS27b, are the key diterpene synthase genes in the biosynthesis of triptolide, which is an important medicinally active diterpenoid in Tripterygium wilfordii. However, the mechanism underlying the regulation of key genes TwTPS27a/b in triptolide biosynthesis remains unclear. In this study, the promoters of TwTPS27a (1496 bp) and TwTPS27b (1862 bp) were isolated and analyzed. Some hormone-/stress-responsive elements and transcription factor (TF) binding sites were predicted in both promoters, which might be responsible for the regulation mechanism of TwTPS27a/b. The β-glucuronidase (GUS) activity analysis in promoter deletion assays under normal and methyl jasmonate (MeJA) conditions showed that the sequence of −921 to −391 bp is the potential core region of the TwTPS27b promoter. And the TGACG-motif, a MeJA-responsive element found in this core region, might be responsible for MeJA-mediated stress induction of GUS activity. Moreover, the TGACG-motif is also known as the TGA TF-binding site. Yeast one-hybrid and GUS transactivation assays confirmed the interaction between the TwTPS27a/b promoters and the TwTGA1 TF (a MeJA-inducible TGA TF upregulating triptolide biosynthesis in T. wilfordii), indicating that TwTPS27a/b are two target genes regulated by TwTGA1. In conclusion, our results provide important information for elucidating the regulatory mechanism of MS genes, TwTPS27a and TwTPS27b, as two target genes of TwTGA1, in jasmonic acid (JA)-inducible triptolide biosynthesis.
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Affiliation(s)
- Yanbo Huo
- College of Plant Protection, Northwest A&F University, Yangling 712100, China; (Y.H.); (B.Z.); (L.C.); (J.Z.)
| | - Bin Zhang
- College of Plant Protection, Northwest A&F University, Yangling 712100, China; (Y.H.); (B.Z.); (L.C.); (J.Z.)
| | - Ling Chen
- College of Plant Protection, Northwest A&F University, Yangling 712100, China; (Y.H.); (B.Z.); (L.C.); (J.Z.)
| | - Jing Zhang
- College of Plant Protection, Northwest A&F University, Yangling 712100, China; (Y.H.); (B.Z.); (L.C.); (J.Z.)
- Engineering and Research Center of Biological Pesticide of Shaanxi Province, Yangling 712100, China
| | - Xing Zhang
- College of Plant Protection, Northwest A&F University, Yangling 712100, China; (Y.H.); (B.Z.); (L.C.); (J.Z.)
- Engineering and Research Center of Biological Pesticide of Shaanxi Province, Yangling 712100, China
- Correspondence: (X.Z.); (C.Z.)
| | - Chuanshu Zhu
- College of Plant Protection, Northwest A&F University, Yangling 712100, China; (Y.H.); (B.Z.); (L.C.); (J.Z.)
- Engineering and Research Center of Biological Pesticide of Shaanxi Province, Yangling 712100, China
- Correspondence: (X.Z.); (C.Z.)
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Dong NQ, Lin HX. Contribution of phenylpropanoid metabolism to plant development and plant-environment interactions. JOURNAL OF INTEGRATIVE PLANT BIOLOGY 2021; 63:180-209. [PMID: 33325112 DOI: 10.1111/jipb.13054] [Citation(s) in RCA: 448] [Impact Index Per Article: 149.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Accepted: 12/10/2020] [Indexed: 05/21/2023]
Abstract
Phenylpropanoid metabolism is one of the most important metabolisms in plants, yielding more than 8,000 metabolites contributing to plant development and plant-environment interplay. Phenylpropanoid metabolism materialized during the evolution of early freshwater algae that were initiating terrestrialization and land plants have evolved multiple branches of this pathway, which give rise to metabolites including lignin, flavonoids, lignans, phenylpropanoid esters, hydroxycinnamic acid amides, and sporopollenin. Recent studies have revealed that many factors participate in the regulation of phenylpropanoid metabolism, and modulate phenylpropanoid homeostasis when plants undergo successive developmental processes and are subjected to stressful environments. In this review, we summarize recent progress on elucidating the contribution of phenylpropanoid metabolism to the coordination of plant development and plant-environment interaction, and metabolic flux redirection among diverse metabolic routes. In addition, our review focuses on the regulation of phenylpropanoid metabolism at the transcriptional, post-transcriptional, post-translational, and epigenetic levels, and in response to phytohormones and biotic and abiotic stresses.
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Affiliation(s)
- Nai-Qian Dong
- National Key Laboratory of Plant Molecular Genetics, CAS Centre for Excellence in Molecular Plant Sciences and Collaborative Innovation Center of Genetics and Development, Shanghai Institute of Plant Physiology and Ecology, the Chinese Academy of Sciences, Shanghai, 200032, China
| | - Hong-Xuan Lin
- National Key Laboratory of Plant Molecular Genetics, CAS Centre for Excellence in Molecular Plant Sciences and Collaborative Innovation Center of Genetics and Development, Shanghai Institute of Plant Physiology and Ecology, the Chinese Academy of Sciences, Shanghai, 200032, China
- University of the Chinese Academy of Sciences, Beijing, 100049, China
- School of Life Science and Technology, ShanghaiTech University, Shanghai, 201210, China
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Yang F, Li CH, Das D, Zheng YH, Song T, Wang LX, Chen MX, Li QZ, Zhang J. Comprehensive Transcriptome and Metabolic Profiling of Petal Color Development in Lycoris sprengeri. FRONTIERS IN PLANT SCIENCE 2021; 12:747131. [PMID: 34925402 PMCID: PMC8678534 DOI: 10.3389/fpls.2021.747131] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2021] [Accepted: 10/18/2021] [Indexed: 05/16/2023]
Abstract
Lycoris sprengeri (L. sprengeri) is an important ornamental bulbous plant, and its numerous varieties in different color forms are widely planted. Multiple color types of petals in L. sprengeri provide us with possibilities to delineate the complicated metabolic networks underlying the biochemical traits behind color formation in this plant species, especially petal color. In this study, we sequenced and annotated a reference transcriptome of pink and white petals of L. sprengeri and analyzed the metabolic role of anthocyanin biosynthesis in regulating color pigment metabolism. Briefly, white and pink petal samples were sequenced with an Illumina platform, to obtain the reads that could be assembled into 100,778 unique sequences. Sequences expressed differentially between white vs. pink petals were further annotated with the terms of Gene Ontology (GO), Clusters of Orthologous Groups (COG), Kyoto Encyclopedia of Genes and Genomes (KEGG), and eggNOG. Gene expression analyses revealed the repression of anthocyanin and steroid biosynthesis enzymes and R2R3 MYB transcription factor (TF) genes in white petals compared to pink petals. Furthermore, the targeted metabolic profiling of anthocyanins revealed that color-related delphinidin (Del) and cyanidin (Cy) pigments are lower in white petals, which correlate well with the reduced gene expression levels of anthocyanin biosynthesis genes. Taken together, it is hypothesized that anthocyanin biosynthesis, steroid biosynthesis, and R2R3 MYB TFs may play vital regulatory roles in petal color development in L. sprengeri. This work provides a valuable genomic resource for flower breeding and metabolic engineering in horticulture and markers for studying the flower trait evolution of L. sprengeri.
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Affiliation(s)
- Feng Yang
- Forestry and Pomology Research Institute, Protected Horticultural Research Institute, Shanghai Academy of Agricultural Sciences, Shanghai, China
- Shenzhen Research Institute, The Chinese University of Hong Kong, Shenzhen, China
| | - Chao-han Li
- Forestry and Pomology Research Institute, Protected Horticultural Research Institute, Shanghai Academy of Agricultural Sciences, Shanghai, China
| | - Debatosh Das
- Shenzhen Research Institute, The Chinese University of Hong Kong, Shenzhen, China
| | - Yu-hong Zheng
- Ornamental Plant Research Center, Institute of Botany, Jiangsu Province and Chinese Academy of Sciences (Nanjing Botanical Garden Memorial Sun Yat-Sen), Nanjing, China
| | - Tao Song
- Shenzhen Research Institute, The Chinese University of Hong Kong, Shenzhen, China
| | - Lan-xiang Wang
- Shenzhen Institute of Synthetic Biology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Mo-Xian Chen
- Shenzhen Institute of Synthetic Biology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Qing-zhu Li
- Forestry and Pomology Research Institute, Protected Horticultural Research Institute, Shanghai Academy of Agricultural Sciences, Shanghai, China
- *Correspondence: Qing-zhu Li,
| | - Jianhua Zhang
- Department of Biology, Hong Kong Baptist University, and State Key Laboratory of Agrobiotechnology, The Chinese University of Hong Kong, Hong Kong SAR, China
- Jianhua Zhang,
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Plant Volatile Organic Compounds Evolution: Transcriptional Regulation, Epigenetics and Polyploidy. Int J Mol Sci 2020; 21:ijms21238956. [PMID: 33255749 PMCID: PMC7728353 DOI: 10.3390/ijms21238956] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Revised: 11/18/2020] [Accepted: 11/23/2020] [Indexed: 12/15/2022] Open
Abstract
Volatile organic compounds (VOCs) are emitted by plants as a consequence of their interaction with biotic and abiotic factors, and have a very important role in plant evolution. Floral VOCs are often involved in defense and pollinator attraction. These interactions often change rapidly over time, so a quick response to those changes is required. Epigenetic factors, such as DNA methylation and histone modification, which regulate both genes and transcription factors, might trigger adaptive responses to these evolutionary pressures as well as regulating the rhythmic emission of VOCs through circadian clock regulation. In addition, transgenerational epigenetic effects and whole genome polyploidy could modify the generation of VOCs’ profiles of offspring, contributing to long-term evolutionary shifts. In this article, we review the available knowledge about the mechanisms that may act as epigenetic regulators of the main VOC biosynthetic pathways, and their importance in plant evolution.
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