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Tan C, Yang J, Xue X, Wei J, Li H, Li Z, Duan Y. MsMYB62-like as a negative regulator of anthocyanin biosynthesis in Malus spectabilis. PLANT SIGNALING & BEHAVIOR 2024; 19:2318509. [PMID: 38375800 PMCID: PMC10880495 DOI: 10.1080/15592324.2024.2318509] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2023] [Accepted: 02/07/2024] [Indexed: 02/21/2024]
Abstract
Crabapple is a valuable tree species in gardens due to its captivating array of flower and leaf colors, rendering it a favored choice in landscaping. The economic and ornamental values of Malus crabapple are closely associated with the biosynthesis of anthocyanin, a pigment responsible for its vibrant hues. The intricate regulation of anthocyanin biosynthesis involves the concerted activity of various genes. However, the specific mechanism governing this process in crabapple warrants in-depth exploration. In this study, we explored the inhibitory role of MsMYB62-like in anthocyanin biosynthesis. We identified MsDFR and MsANS as two downstream target genes of MsMYB62-like. These genes encode enzymes integral to the anthocyanin biosynthetic pathway. The findings demonstrate that MsMYB62-like directly binds to the promoters of MsDFR and MsANS, resulting in the downregulation of their expression levels. Additionally, our observations indicate that the plant hormone cytokinins exert a suppressive effect on the expression levels of MsMYB62-like, while concurrently upregulating MsDFR and MsANS. This study reveals that the MsMYB62-like-MsDFR/MsANS module plays an important role in governing anthocyanin levels in Malus crabapple. Notably, the regulatory interplay is modulated by the plant hormone cytokinins.
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Affiliation(s)
- Cuixia Tan
- College of Life Sciences, Northwest A&F University, Yangling, Shaanxi, China
| | - Jingyi Yang
- College of Life Sciences, Northwest A&F University, Yangling, Shaanxi, China
| | - Xingyue Xue
- College of Landscape Architecture and Art, Northwest A&F University, Yangling, Shaanxi, China
| | - Jun Wei
- College of Landscape Architecture and Art, Northwest A&F University, Yangling, Shaanxi, China
| | - Houhua Li
- College of Landscape Architecture and Art, Northwest A&F University, Yangling, Shaanxi, China
| | - Zenglin Li
- College of Life Sciences, Northwest A&F University, Yangling, Shaanxi, China
| | - Ying Duan
- College of Landscape Architecture and Art, Northwest A&F University, Yangling, Shaanxi, China
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Liu Y, Jin H, Zhang Y, Feng X, Dai Y, Zhu P. A novel three-layer module BoMYB1R1-BoMYB4b/BoMIEL1-BoDFR1 regulates anthocyanin accumulation in kale. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2024. [PMID: 38865101 DOI: 10.1111/tpj.16881] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2024] [Revised: 05/16/2024] [Accepted: 05/27/2024] [Indexed: 06/13/2024]
Abstract
Anthocyanin is an important pigment responsible for plant coloration and beneficial to human health. Kale (Brassica oleracea var. acephala), a primary cool-season flowers and vegetables, is an ideal material to study anthocyanin biosynthesis and regulation mechanisms due to its anthocyanin-rich leaves. However, the underlying molecular mechanism of anthocyanin accumulation in kale remains poorly understood. Previously, we demonstrated that BoDFR1 is a key gene controlling anthocyanin biosynthesis in kale. Here, we discovered a 369-bp InDel variation in the BoDFR1 promoter between the two kale inbred lines with different pink coloration, which resulted in reduced transcriptional activity of the BoDFR1 gene in the light-pink line. With the 369-bp insertion as a bait, an R2R3-MYB repressor BoMYB4b was identified using the yeast one-hybrid screening. Knockdown of the BoMYB4b gene led to increased BoDFR1 expression and anthocyanin accumulation. An E3 ubiquitin ligase, BoMIEL1, was found to mediate the degradation of BoMYB4b, thereby promoting anthocyanin biosynthesis. Furthermore, the expression level of BoMYB4b was significantly reduced by light signals, which was attributed to the direct repression of the light-signaling factor BoMYB1R1 on the BoMYB4b promoter. Our study revealed that a novel regulatory module comprising BoMYB1R1, BoMIEL1, BoMYB4b, and BoDFR1 finely regulates anthocyanin accumulation in kale. The findings aim to establish a scientific foundation for genetic improvement of leaf color traits in kale, meanwhile, providing a reference for plant coloration studies.
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Affiliation(s)
- Yang Liu
- College of Forestry, Shenyang Agricultural University, Shenyang, 110866, China
| | - Hangbiao Jin
- College of Forestry, Shenyang Agricultural University, Shenyang, 110866, China
| | - Yuting Zhang
- College of Forestry, Shenyang Agricultural University, Shenyang, 110866, China
| | - Xin Feng
- College of Forestry, Shenyang Agricultural University, Shenyang, 110866, China
- Key Laboratory of Forest Tree Genetics, Breeding and Cultivation of Liaoning Province, Shenyang, 110866, China
| | - Yujia Dai
- College of Forestry, Shenyang Agricultural University, Shenyang, 110866, China
| | - Pengfang Zhu
- College of Forestry, Shenyang Agricultural University, Shenyang, 110866, China
- Key Laboratory of Forest Tree Genetics, Breeding and Cultivation of Liaoning Province, Shenyang, 110866, China
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Xiao TW, Liu X, Fu N, Liu TJ, Wang ZF, Ge XJ, Huang HR. Chromosome-level genome assemblies of Musa ornata and Musa velutina provide insights into pericarp dehiscence and anthocyanin biosynthesis in banana. HORTICULTURE RESEARCH 2024; 11:uhae079. [PMID: 38766534 PMCID: PMC11101321 DOI: 10.1093/hr/uhae079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Accepted: 03/08/2024] [Indexed: 05/22/2024]
Abstract
Musa ornata and Musa velutina are members of the Musaceae family and are indigenous to the South and Southeast Asia. They are very popular in the horticultural market, but the lack of genomic sequencing data and genetic studies has hampered efforts to improve their ornamental value. In this study, we generated the first chromosome-level genome assemblies for both species by utilizing Oxford Nanopore long reads and Hi-C reads. The genomes of M. ornata and M. velutina were assembled into 11 pseudochromosomes with genome sizes of 427.85 Mb and 478.10 Mb, respectively. Repetitive sequences comprised 46.70% and 50.91% of the total genomes for M. ornata and M. velutina, respectively. Differentially expressed gene (DEG) and Gene Ontology (GO) enrichment analyses indicated that upregulated genes in the mature pericarps of M. velutina were mainly associated with the saccharide metabolic processes, particularly at the cell wall and extracellular region. Furthermore, we identified polygalacturonase (PG) genes that exhibited higher expression level in mature pericarps of M. velutina compared to other tissues, potentially being accountable for pericarp dehiscence. This study also identified genes associated with anthocyanin biosynthesis pathway. Taken together, the chromosomal-level genome assemblies of M. ornata and M. velutina provide valuable insights into the mechanism of pericarp dehiscence and anthocyanin biosynthesis in banana, which will significantly contribute to future genetic and molecular breeding efforts.
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Affiliation(s)
- Tian-Wen Xiao
- Key Laboratory of National Forestry and Grassland Administration on Plant Conservation and Utilization in Southern China, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
- South China National Botanical Garden, Guangzhou 510650, China
| | - Xin Liu
- Key Laboratory of National Forestry and Grassland Administration on Plant Conservation and Utilization in Southern China, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
- South China National Botanical Garden, Guangzhou 510650, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Ning Fu
- Key Laboratory of National Forestry and Grassland Administration on Plant Conservation and Utilization in Southern China, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
- South China National Botanical Garden, Guangzhou 510650, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Tong-Jian Liu
- Key Laboratory of National Forestry and Grassland Administration on Plant Conservation and Utilization in Southern China, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
- South China National Botanical Garden, Guangzhou 510650, China
| | - Zheng-Feng Wang
- South China National Botanical Garden, Guangzhou 510650, China
- Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
- Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, 510650, China
| | - Xue-Jun Ge
- South China National Botanical Garden, Guangzhou 510650, China
- State Key Laboratory of Plant Diversity and Specialty Crops, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
| | - Hui-Run Huang
- Key Laboratory of National Forestry and Grassland Administration on Plant Conservation and Utilization in Southern China, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
- South China National Botanical Garden, Guangzhou 510650, China
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Jiang L, Chen J, Qian J, Xu M, Qing H, Cheng H, Fu J, Zhang C. The R2R3-MYB transcription factor ZeMYB32 negatively regulates anthocyanin biosynthesis in Zinnia elegans. PLANT MOLECULAR BIOLOGY 2024; 114:48. [PMID: 38632151 DOI: 10.1007/s11103-024-01441-0] [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: 04/06/2023] [Accepted: 03/12/2024] [Indexed: 04/19/2024]
Abstract
KEY MESSAGE This study identified an R2R3-MYB from Zinnia elegans, ZeMYB32, which negatively regulates anthocyanin biosynthesis.
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Affiliation(s)
- Lingli Jiang
- Zhejiang Provincial Key Laboratory of Germplasm Innovation and Utilization for Garden Plants, School of Landscape Architecture, Zhejiang Agriculture & Forestry University, Hangzhou, 311300, China
- Key Laboratory of National Forestry and Grassland Administration on Germplasm Innovation and Utilization for Southern Garden Plants, School of Landscape Architecture, Zhejiang Agriculture & Forestry University, Hangzhou, 311300, China
| | - Jiahong Chen
- Zhejiang Provincial Key Laboratory of Germplasm Innovation and Utilization for Garden Plants, School of Landscape Architecture, Zhejiang Agriculture & Forestry University, Hangzhou, 311300, China
- Key Laboratory of National Forestry and Grassland Administration on Germplasm Innovation and Utilization for Southern Garden Plants, School of Landscape Architecture, Zhejiang Agriculture & Forestry University, Hangzhou, 311300, China
| | - Jieyu Qian
- Zhejiang Provincial Key Laboratory of Germplasm Innovation and Utilization for Garden Plants, School of Landscape Architecture, Zhejiang Agriculture & Forestry University, Hangzhou, 311300, China
- Key Laboratory of National Forestry and Grassland Administration on Germplasm Innovation and Utilization for Southern Garden Plants, School of Landscape Architecture, Zhejiang Agriculture & Forestry University, Hangzhou, 311300, China
| | - Menghan Xu
- Zhejiang Provincial Key Laboratory of Germplasm Innovation and Utilization for Garden Plants, School of Landscape Architecture, Zhejiang Agriculture & Forestry University, Hangzhou, 311300, China
- Key Laboratory of National Forestry and Grassland Administration on Germplasm Innovation and Utilization for Southern Garden Plants, School of Landscape Architecture, Zhejiang Agriculture & Forestry University, Hangzhou, 311300, China
| | - Hongsheng Qing
- Zhejiang Provincial Key Laboratory of Germplasm Innovation and Utilization for Garden Plants, School of Landscape Architecture, Zhejiang Agriculture & Forestry University, Hangzhou, 311300, China
- Key Laboratory of National Forestry and Grassland Administration on Germplasm Innovation and Utilization for Southern Garden Plants, School of Landscape Architecture, Zhejiang Agriculture & Forestry University, Hangzhou, 311300, China
| | - Hefeng Cheng
- Zhejiang Provincial Key Laboratory of Germplasm Innovation and Utilization for Garden Plants, School of Landscape Architecture, Zhejiang Agriculture & Forestry University, Hangzhou, 311300, China
- Key Laboratory of National Forestry and Grassland Administration on Germplasm Innovation and Utilization for Southern Garden Plants, School of Landscape Architecture, Zhejiang Agriculture & Forestry University, Hangzhou, 311300, China
| | - Jianxin Fu
- Zhejiang Provincial Key Laboratory of Germplasm Innovation and Utilization for Garden Plants, School of Landscape Architecture, Zhejiang Agriculture & Forestry University, Hangzhou, 311300, China.
- Key Laboratory of National Forestry and Grassland Administration on Germplasm Innovation and Utilization for Southern Garden Plants, School of Landscape Architecture, Zhejiang Agriculture & Forestry University, Hangzhou, 311300, China.
| | - Chao Zhang
- Zhejiang Provincial Key Laboratory of Germplasm Innovation and Utilization for Garden Plants, School of Landscape Architecture, Zhejiang Agriculture & Forestry University, Hangzhou, 311300, China.
- Key Laboratory of National Forestry and Grassland Administration on Germplasm Innovation and Utilization for Southern Garden Plants, School of Landscape Architecture, Zhejiang Agriculture & Forestry University, Hangzhou, 311300, China.
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Wang A, Ma H, Zhang X, Zhang B, Li F. Transcriptomic analysis reveals the mechanism underlying the anthocyanin changes in Fragaria nilgerrensis Schlecht. and its interspecific hybrids. BMC PLANT BIOLOGY 2023; 23:356. [PMID: 37434140 DOI: 10.1186/s12870-023-04361-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Accepted: 06/22/2023] [Indexed: 07/13/2023]
Abstract
BACKGROUND Fragaria nilgerrensis (FN) provides a rich source of genetic variations for strawberry germplasm innovation. The color of strawberry fruits is a key factor affecting consumer preferences. However, the genetic basis of the fruit color formation in F. nilgerrensis and its interspecific hybrids has rarely been researched. RESULTS In this study, the fruit transcriptomes and flavonoid contents of FN (white skin; control) and its interspecific hybrids BF1 and BF2 (pale red skin) were compared. A total of 31 flavonoids were identified. Notably, two pelargonidin derivatives (pelargonidin-3-O-glucoside and pelargonidin-3-O-rutinoside) were revealed as potential key pigments for the coloration of BF1 and BF2 fruits. Additionally, dihydroflavonol 4-reductase (DFR) (LOC101293459 and LOC101293749) and anthocyanidin 3-O-glucosyltransferase (BZ1) (LOC101300000), which are crucial structural genes in the anthocyanidin biosynthetic pathway, had significantly up-regulated expression levels in the two FN interspecific hybrids. Moreover, most of the genes encoding transcription factors (e.g., MYB, WRKY, TCP, bHLH, AP2, and WD40) related to anthocyanin accumulation were differentially expressed. We also identified two DFR genes (LOC101293749 and LOC101293459) that were significantly correlated with members in bHLH, MYB, WD40, AP2, and bZIP families. Two chalcone synthase (CHS) (LOC101298162 and LOC101298456) and a BZ1 gene (LOC101300000) were highly correlated with members in bHLH, WD40 and AP2 families. CONCLUSIONS Pelargonidin-3-O-glucoside and pelargonidin-3-O-rutinoside may be the key pigments contributing to the formation of pale red fruit skin. DFR and BZ1 structural genes and some bHLH, MYB, WD40, AP2, and bZIP TF family members enhance the accumulation of two pelargonidin derivatives. This study provides important insights into the regulation of anthocyanidin biosynthesis in FN and its interspecific hybrids. The presented data may be relevant for improving strawberry fruit coloration via genetic engineering.
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Affiliation(s)
- Aihua Wang
- School of Biological and Food Engineering, Engineering Research Center for Development and High Value Utilization of Genuine Medicinal Materials in North Anhui Province, Suzhou University, Suzhou, 234000, Anhui, China
- Horticulture Institute (Guizhou Horticultural Engineering Technology Research Caenter), Guizhou Academy of Agricultural Sciences, Guiyang, 550006, China
| | - Hongye Ma
- Horticulture Institute (Guizhou Horticultural Engineering Technology Research Caenter), Guizhou Academy of Agricultural Sciences, Guiyang, 550006, China
| | - Xingtao Zhang
- School of Biological and Food Engineering, Engineering Research Center for Development and High Value Utilization of Genuine Medicinal Materials in North Anhui Province, Suzhou University, Suzhou, 234000, Anhui, China
| | - Baohui Zhang
- Horticulture Institute (Guizhou Horticultural Engineering Technology Research Caenter), Guizhou Academy of Agricultural Sciences, Guiyang, 550006, China
| | - Fei Li
- Horticulture Institute (Guizhou Horticultural Engineering Technology Research Caenter), Guizhou Academy of Agricultural Sciences, Guiyang, 550006, China.
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Li S, Zhang Y, Shi L, Cao S, Chen W, Yang Z. Involvement of a MYB Transcription Factor in Anthocyanin Biosynthesis during Chinese Bayberry ( Morella rubra) Fruit Ripening. BIOLOGY 2023; 12:894. [PMID: 37508327 PMCID: PMC10376099 DOI: 10.3390/biology12070894] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2023] [Revised: 06/17/2023] [Accepted: 06/19/2023] [Indexed: 07/30/2023]
Abstract
Anthocyanin is a class of water-soluble flavonoids found in Chinese bayberry (Morella rubra) that is not only responsible for the variety of colors visible in nature but also has numerous health-promoting benefits in humans. Through comparative transcriptomics, we isolated and identified a transcription factor (TF) of the R2R3-MYB type, MrMYB9, in order to explore the anthocyanin biosynthesis pathway in red and white Chinese bayberries. MrMYB9 transcript was positively correlated with anthocyanin level and anthocyanin biosynthetic gene expression during Chinese bayberry fruit maturation (R-values in the range 0.54-0.84, p < 0.05). Sequence analysis revealed that MrMYB9 shared a similar R2R3 domain with MYB activators of anthocyanin biosynthesis in other plants. MrMYB9 substantially transactivated promoters of anthocyanin biosynthesis-related EBGs (MrCHI, MrF3'H, and MrANS) and LBGs (MrUFGT) upon co-expression of the AtEGL3 gene. Our findings indicated that MrMYB9 may positively modulate anthocyanin accumulation in Chinese bayberry.
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Affiliation(s)
- Saisai Li
- College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo 315100, China
| | - Yijuan Zhang
- College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo 315100, China
| | - Liyu Shi
- College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo 315100, China
| | - Shifeng Cao
- College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo 315100, China
| | - Wei Chen
- College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo 315100, China
| | - Zhenfeng Yang
- College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo 315100, China
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Anthocyanins distribution, transcriptional regulation, epigenetic and post-translational modification in fruits. Food Chem 2023; 411:135540. [PMID: 36701918 DOI: 10.1016/j.foodchem.2023.135540] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2022] [Revised: 01/04/2023] [Accepted: 01/19/2023] [Indexed: 01/24/2023]
Abstract
Anthocyanins have indispensable functions in plant resistance, human health, and fruit coloring, which arouse people's favorite. It has been reported that anthocyanins are widely found in fruits, and can be affected by numerous factors. In this review, we systematically summarize anthocyanin functions, classifications, distributions, biosynthesis, decoration, transportation, transcriptional regulation, DNA methylation, and post-translational regulation in fruits.
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Busche M, Pucker B, Weisshaar B, Stracke R. Three R2R3-MYB transcription factors from banana (Musa acuminata) activate structural anthocyanin biosynthesis genes as part of an MBW complex. BMC Res Notes 2023; 16:103. [PMID: 37312204 DOI: 10.1186/s13104-023-06375-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Accepted: 06/02/2023] [Indexed: 06/15/2023] Open
Abstract
OBJECTIVE Bananas are one of the most popular fruits in the world, providing food security and employment opportunities in several developing countries. Increasing the anthocyanin content of banana fruit could improve the health-promoting properties. Anthocyanin biosynthesis is largely regulated at the transcriptional level. However, relatively little is known about the transcriptional activation of anthocyanin biosynthesis in banana. RESULTS We analysed the regulatory activity of three Musa acuminata MYBs that were predicted by bioinformatic analysis to transcriptionally regulate anthocyanin biosynthesis in banana. MaMYBA1, MaMYBA2 and MaMYBPA2 did not complement the anthocyanin-deficient phenotype of the Arabidopsis thaliana pap1/pap2 mutant. However, co-transfection experiments in A. thaliana protoplasts showed that MaMYBA1, MaMYBA2 and MaMYBPA2 function as components of a transcription factor complex with a bHLH and WD40 protein, the so called MBW complex, resulting in the activation of the A. thaliana ANTHOCYANIDIN SYNTHASE and DIHYDROFLAVONOL 4-REDUCTASE promoters. The activation potential of MaMYBA1, MaMYBA2 and MaMYBPA2 was increased when combined with the monocot Zea mays bHLH ZmR instead of the dicot AtEGL3. This work paves the path towards decoding the MBW complex-mediated transcriptional activation of anthocyanin biosynthesis in banana. It will also facilitate research towards increased anthocyanin content in banana and other monocot crops.
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Affiliation(s)
- Mareike Busche
- Genetics and Genomics of Plants, Faculty of Biology, Bielefeld University, 33615, Bielefeld, Germany
| | - Boas Pucker
- Institute of Plant Biology & Braunschweig Integrated Centre of Systems Biology (BRICS), TU Braunschweig, 38106, Braunschweig, Germany
| | - Bernd Weisshaar
- Genetics and Genomics of Plants, Faculty of Biology, Bielefeld University, 33615, Bielefeld, Germany
| | - Ralf Stracke
- Genetics and Genomics of Plants, Faculty of Biology, Bielefeld University, 33615, Bielefeld, Germany.
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Wang Y, Wang Z, Zhang J, Liu Z, Wang H, Tu H, Zhou J, Luo X, Chen Q, He W, Yang S, Li M, Lin Y, Zhang Y, Zhang Y, Luo Y, Tang H, Wang X. Integrated Transcriptome and Metabolome Analyses Provide Insights into the Coloring Mechanism of Dark-red and Yellow Fruits in Chinese Cherry [ Cerasus pseudocerasus (Lindl.) G. Don]. Int J Mol Sci 2023; 24:ijms24043471. [PMID: 36834881 PMCID: PMC9965709 DOI: 10.3390/ijms24043471] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Revised: 02/03/2023] [Accepted: 02/07/2023] [Indexed: 02/11/2023] Open
Abstract
Chinese cherry [Cerasus pseudocerasus (Lindl.) G. Don] is an important fruit tree from China that has excellent ornamental, economic, and nutritional values with various colors. The dark-red or red coloration of fruit, an attractive trait for consumers, is determined by anthocyanin pigmentation. In this study, the coloring patterns during fruit development in dark-red and yellow Chinese cherry fruits were firstly illustrated by integrated transcriptome and widely-targeted metabolome analyses. Anthocyanin accumulation in dark-red fruits was significantly higher compared with yellow fruits from the color conversion period, being positively correlated to the color ratio. Based on transcriptome analysis, eight structural genes (CpCHS, CpCHI, CpF3H, CpF3'H, CpDFR, CpANS, CpUFGT, and CpGST) were significantly upregulated in dark-red fruits from the color conversion period, especially CpANS, CpUFGT, and CpGST. On contrary, the expression level of CpLAR were considerably higher in yellow fruits than in dark-red fruits, especially at the early stage. Eight regulatory genes (CpMYB4, CpMYB10, CpMYB20, CpMYB306, bHLH1, CpNAC10, CpERF106, and CpbZIP4) were also identified as determinants of fruit color in Chinese cherry. Liquid chromatography-tandem mass spectrometry identified 33 and 3 differential expressed metabolites related to anthocyanins and procyanidins between mature dark-red and yellow fruits. Cyanidin-3-O-rutinoside was the predominant anthocyanin compound in both fruits, while it was 6.23-fold higher in dark-red than in yellow fruits. More accumulated flavanol and procyanidin contents resulted in less anthocyanin content in flavonoid pathway in yellow fruits due to the higher expression level of CpLAR. These findings can help understand the coloring mechanism of dark-red and yellow fruits in Chinese cherry, and provide genetic basis for breeding new cultivars.
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Affiliation(s)
- Yan Wang
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China
- Institute of Pomology and Olericulture, Sichuan Agricultural University, Chengdu 611130, China
| | - Zhiyi Wang
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China
- Institute of Pomology and Olericulture, Sichuan Agricultural University, Chengdu 611130, China
| | - Jing Zhang
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China
- Institute of Pomology and Olericulture, Sichuan Agricultural University, Chengdu 611130, China
| | - Zhenshan Liu
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China
- Institute of Pomology and Olericulture, Sichuan Agricultural University, Chengdu 611130, China
| | - Hao Wang
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China
- Institute of Pomology and Olericulture, Sichuan Agricultural University, Chengdu 611130, China
| | - Hongxia Tu
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China
- Institute of Pomology and Olericulture, Sichuan Agricultural University, Chengdu 611130, China
| | - Jingting Zhou
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China
- Institute of Pomology and Olericulture, Sichuan Agricultural University, Chengdu 611130, China
| | - Xirui Luo
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China
| | - Qing Chen
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China
| | - Wen He
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China
- Institute of Pomology and Olericulture, Sichuan Agricultural University, Chengdu 611130, China
| | - Shaofeng Yang
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China
- Institute of Pomology and Olericulture, Sichuan Agricultural University, Chengdu 611130, China
| | - Mengyao Li
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China
| | - Yuanxiu Lin
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China
- Institute of Pomology and Olericulture, Sichuan Agricultural University, Chengdu 611130, China
| | - Yunting Zhang
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China
- Institute of Pomology and Olericulture, Sichuan Agricultural University, Chengdu 611130, China
| | - Yong Zhang
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China
| | - Ya Luo
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China
| | - Haoru Tang
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China
- Institute of Pomology and Olericulture, Sichuan Agricultural University, Chengdu 611130, China
| | - Xiaorong Wang
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China
- Institute of Pomology and Olericulture, Sichuan Agricultural University, Chengdu 611130, China
- Correspondence:
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Yin Z, Liu J, Zhao H, Chu X, Liu H, Ding X, Lu C, Wang X, Zhao X, Li Y, Ding X. SlMYB1 regulates the accumulation of lycopene, fruit shape, and resistance to Botrytis cinerea in tomato. HORTICULTURE RESEARCH 2023; 10:uhac282. [PMID: 36818368 PMCID: PMC9930398 DOI: 10.1093/hr/uhac282] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Accepted: 12/07/2022] [Indexed: 05/20/2023]
Abstract
Fruit lycopene, shape, and resistance are essential traits in vegetables whose final product is fruit, and they are also closely related to and strictly regulated by multiple transcription factors. Lycopene, which cannot be synthesized by the human body and can only be ingested from the outside, was important in maintaining human health. During fruit ripening and post-harvest, tomato plants face a variety of biotic or abiotic stresses, which might inflict great damage to fruit quality due to its flat shape and pointed tip during storage and transportation. Therefore, there is an urgent need for key molecular switches to simultaneously improve fruit lycopene and resistance to biotic stress during ripening. Here, we identified the MYB transcription factor SlMYB1 in tomato plants which could bind to the promoters of lycopene synthesis-related genes, SlLCY1, SlPSY2, and the pathogen-related gene SlPR5 directly, to regulate the fruit lycopene and resistance to Botrytis cinerea in tomato. In addition to regulating lycopene synthesis, SlMYB1 also regulates the content of soluble sugar, soluble protein and flavonoid in tomato. What's more, SlMYB1 could regulate the tomato fruit shape, making it smoother or flatter to prevent skin damage caused by vibration on fruits. RNA sequencing (RNA-seq) further showed that SlMYB1 fruit-specific expression lines had multiple differentially expressed genes compared with those from wild-type plants, suggesting that SlMYB1 might have multiple roles in fruit nutritional quality control and resistance to stresses, which is a rare occurrence in previous studies. In summary, our results revealed that SlMYB1 was an essential multi-functional transcription factor that could regulate the lycopene and resistance to Botrytis cinerea, and change the shape of fruit in tomato plants.
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Affiliation(s)
| | | | | | - Xiaomeng Chu
- State Key Laboratory of Crop Biology, Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect Pests, College of plant protection, Shandong Agricultural University, Taian 271018, Shandong, China
| | - Haoqi Liu
- State Key Laboratory of Crop Biology, Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect Pests, College of plant protection, Shandong Agricultural University, Taian 271018, Shandong, China
| | - Xiangyu Ding
- State Key Laboratory of Crop Biology, Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect Pests, College of plant protection, Shandong Agricultural University, Taian 271018, Shandong, China
| | - Chongchong Lu
- State Key Laboratory of Crop Biology, Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect Pests, College of plant protection, Shandong Agricultural University, Taian 271018, Shandong, China
| | - Xinyu Wang
- State Key Laboratory of Crop Biology, Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect Pests, College of plant protection, Shandong Agricultural University, Taian 271018, Shandong, China
| | - Xiangyu Zhao
- State Key Laboratory of Crop Biology, College of Academy of Life Science, Shandong Agricultural University, Taian 271018, Shandong, China
| | - Yang Li
- Corresponding authors. E-mails: ;
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11
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Zou H, Zhou L, Han L, Lv J, Jia Y, Wang Y. Transcriptome profiling reveals the roles of pigment formation mechanisms in yellow Paeonia delavayi flowers. Mol Genet Genomics 2023; 298:375-387. [PMID: 36580169 PMCID: PMC9938063 DOI: 10.1007/s00438-022-01973-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Accepted: 10/30/2022] [Indexed: 12/30/2022]
Abstract
The yellow colour of ornamental varieties of tree peony originated from Paeonia delavayi. However, but P. delavayi and Paeonia suffruticosa belong to different subgroups, so hybridization is difficult and results in a long breeding cycle. However, no comprehensive transcriptomic profiling has focused on the colour formation mechanisms of yellow tree peony petals. Analysing the colour formation mechanism of yellow petals in P. delavayi is very important for directional molecular breeding. In this study, the transcriptional map of yellow pigment development in petals was used to analyse the mechanism of petal colour formation. We analysed the genes related to the metabolism of flavonoids and carotenoids and the transcription factors (TFs) involved in P. delavayi var. lutea (pure yellow individual) yellow pigment development using transcriptome sequence profiling. Transcriptome sequence profiles revealed three and four differentially expressed transcripts (DETs) involved in flavonoid biosynthesis and carotenoid biosynthesis, respectively. An analysis of DETs in the flavonoid pathway showed that chalcone synthase (CHS) and chalcone 2´-glucosyltransferases (THC2'GT) act in synergy to synthesize isosalipurposide (ISP). CHS and flavonol synthase (FLS) synergistically synthesize quercetin and kaempferol. DEG analysis of the carotenoid pathway revealed that phytoene synthase (PSY), carotenoid isomerase (CRTISO) and β-carotene hydroxylases (CHYB) play a key role in regulating lutein formation, and carotenoid cleavage dioxygenase (CCD) plays an important role in the degradation of carotenoids. These two pathways may be regulated by TF families such as bHLH, ARF, and MYB. The results of the transient overexpression of genes showed that CHS and CHI are regulated by PdMYB2. In this study, the molecular mechanism of ISP synthesis was analysed in depth, and the complete metabolic pathway of carotenoids in Paeonia L. was reported for the first time. By studying the formation mechanism of yellow pigment in P. delavayi petals, a breeding strategy for improving flavonol and carotenoid contents and reducing anthocyanin synthesis by genetic engineering was suggested.
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Affiliation(s)
- Hongzhu Zou
- Key Laboratory of Tree Breeding and Cultivation, State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, 10091, China
| | - Lin Zhou
- Key Laboratory of Tree Breeding and Cultivation, State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, 10091, China
| | - Lulu Han
- Key Laboratory of Tree Breeding and Cultivation, State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, 10091, China
| | - JiHang Lv
- Key Laboratory of Tree Breeding and Cultivation, State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, 10091, China
| | - YingHua Jia
- Key Laboratory of Tree Breeding and Cultivation, State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, 10091, China
| | - Yan Wang
- Key Laboratory of Tree Breeding and Cultivation, State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, 10091, China.
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12
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Kavas M, Abdulla MF, Mostafa K, Seçgin Z, Yerlikaya BA, Otur Ç, Gökdemir G, Kurt Kızıldoğan A, Al-Khayri JM, Jain SM. Investigation and Expression Analysis of R2R3-MYBs and Anthocyanin Biosynthesis-Related Genes during Seed Color Development of Common Bean ( Phaseolus vulgaris). PLANTS (BASEL, SWITZERLAND) 2022; 11:3386. [PMID: 36501424 PMCID: PMC9736660 DOI: 10.3390/plants11233386] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/23/2022] [Revised: 11/30/2022] [Accepted: 12/01/2022] [Indexed: 06/17/2023]
Abstract
Anthocyanins are responsible for the coloration of common bean seeds, and their accumulation is positively correlated with the expression level of anthocyanin biosynthetic genes. The MBW (MYB-bHLH-WD40) complex is thought to regulate the expression of these genes, and MYB proteins, which are a key factor in activating anthocyanin pathway genes, have been identified in several plants. This study demonstrated gene structures, chromosomal placements, gene duplications of R2R3-MYBs, miRNAs associated with R2R3-MYBs, and the interaction of these genes with other flavonoid regulatory genes. qRT-PCR was used to investigate the role of specific R2R3-MYBs and flavonoid genes in common bean seed color development. As a result of a comprehensive analysis with the help of in silico tools, we identified 160 R2R3-MYB genes in the common bean genome. We divided these genes into 16 classes on the basis of their intron-exon and motif structures. Except for three, the rest of the common bean R2R3-MYB members were distributed to all chromosomes with different densities, primarily located on chromosomes 3 and 8. We identified a total of 44 duplicated gene pairs dispersed across 11 chromosomes and evolved under purifying selection (Ka/Ks < 1), 19 of which were derived from a whole-genome duplication. Our research uncovered 25 putative repressor PvMYB proteins that contain the EAR motif. Additionally, fifty different cis-regulatory elements regulated by light, stress, and hormone were identified. Within the genome of the common bean, we discovered a total of 36 microRNAs that target a total of 72 R2R3-MYB transcripts. The effect of 16 R2R3-MYB genes and 16 phenylpropanoid pathway genes, selected on the basis of their interaction in the protein-protein interaction map, playing role in the regulation of seed coat color development was evaluated using qRT-PCR in 5 different tissues at different developmental stages. The results revealed that these specific genes have different expression levels during different developmental periods, with higher levels in the pod filling and early pod stages than in the rest of the developmental periods. Furthermore, it was shown that PvTT8 (bHLH), PvTT2 (PvMYB42), PvMYB113, PvTTG1, and PvWD68 genes have effects on the regulation of seed coat color. The findings of this study, which is the first to use whole-genome analysis to identify and characterize the R2R3-MYB genes in common bean, may serve as a reference for future functional research in the legume.
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Affiliation(s)
- Musa Kavas
- Department of Agricultural Biotechnology, Faculty of Agriculture, Ondokuz Mayis University, Samsun 55270, Turkey
| | - Mohamed Farah Abdulla
- Department of Agricultural Biotechnology, Faculty of Agriculture, Ondokuz Mayis University, Samsun 55270, Turkey
| | - Karam Mostafa
- Department of Agricultural Biotechnology, Faculty of Agriculture, Ondokuz Mayis University, Samsun 55270, Turkey
- The Central Laboratory for Date Palm Research and Development, Agricultural Research Center (ARC), Giza 12619, Egypt
| | - Zafer Seçgin
- Department of Agricultural Biotechnology, Faculty of Agriculture, Ondokuz Mayis University, Samsun 55270, Turkey
| | - Bayram Ali Yerlikaya
- Department of Agricultural Biotechnology, Faculty of Agriculture, Ondokuz Mayis University, Samsun 55270, Turkey
| | - Çiğdem Otur
- Department of Agricultural Biotechnology, Faculty of Agriculture, Ondokuz Mayis University, Samsun 55270, Turkey
| | - Gökhan Gökdemir
- Department of Agricultural Biotechnology, Faculty of Agriculture, Ondokuz Mayis University, Samsun 55270, Turkey
| | - Aslıhan Kurt Kızıldoğan
- Department of Agricultural Biotechnology, Faculty of Agriculture, Ondokuz Mayis University, Samsun 55270, Turkey
| | - Jameel Mohammed Al-Khayri
- Department of Plant Biotechnology, College of Agriculture and Food Sciences, King Faisal University, Al-Ahsa 31982, Saudi Arabia
| | - Shri Mohan Jain
- Department of Agricultural Sciences, University of Helsinki, PL-27, 00014 Helsinki, Finland
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13
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Xie T, Zan X, Chen X, Zhu H, Rong H, Wang Y, Jiang J. An R3-MYB repressor, BnCPC forms a feedback regulation with MBW complex to modulate anthocyanin biosynthesis in Brassica napus. BIOTECHNOLOGY FOR BIOFUELS AND BIOPRODUCTS 2022; 15:133. [PMID: 36447291 PMCID: PMC9706894 DOI: 10.1186/s13068-022-02227-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Accepted: 11/09/2022] [Indexed: 12/03/2022]
Abstract
BACKGROUND Anthocyanins are metabolites of phenylpropanoid pathway, and involves in diverse processes of plant development and adaptation, which are regulated by the MYB-bHLH-WD40 (MBW) protein complexes. Many R2R3-MYB activators have been well characterized, but the MYB repressors in anthocyanin biosynthesis were recognized recently, which are also important in modulating phenylpropanoid metabolism in plants. The regulatory mechanism of anthocyanin biosynthesis in oil crop Brassica napus remains to be revealed. RESULTS In this study, we identified an anthocyanin repressor BnCPC in B. napus. BnCPC encoded a typical R3-MYB protein containing a conserved [D/E]Lx2[R/K]x3Lx6Lx3R motif for interaction with bHLH proteins. Overexpression of BnCPC in B. napus inhibited anthocyanin accumulation, especially under anthocyanin inducible conditions. Protein-protein interaction and dual-luciferase assays confirmed that BnCPC could compete with BnPAP1 to interact with bHLHs (BnTT8 and BnEGL3), and repress the expression of anthocyanin biosynthetic genes (e.g., BnDFR) that activated by MBW complexes. Moreover, we found BnCPC inhibited the MBW complex-induced BnCPC activity. CONCLUSIONS Overall, this research demonstrated that BnCPC repressed anthocyanin biosynthesis by affecting the formation of MBW complex, and formed a feedback loop to regulate anthocyanin accumulation in B. napus.
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Affiliation(s)
- Tao Xie
- grid.268415.cJiangsu Provincial Key Laboratory of Crop Genetics and Physiology, Yangzhou University, Yangzhou, 225009 China ,Joint International Research Laboratory of Agriculture and Agri-Product Safety, The Ministry of Education of China, Yangzhou, 225009 China
| | - Xiongyun Zan
- grid.268415.cJiangsu Provincial Key Laboratory of Crop Genetics and Physiology, Yangzhou University, Yangzhou, 225009 China
| | - Xin Chen
- grid.268415.cJiangsu Provincial Key Laboratory of Crop Genetics and Physiology, Yangzhou University, Yangzhou, 225009 China
| | - Haotian Zhu
- grid.268415.cJiangsu Provincial Key Laboratory of Crop Genetics and Physiology, Yangzhou University, Yangzhou, 225009 China
| | - Hao Rong
- grid.263761.70000 0001 0198 0694School of Biological and Food Engineering, Suzhou University, Suzhou, 234000 China
| | - Youping Wang
- grid.268415.cJiangsu Provincial Key Laboratory of Crop Genetics and Physiology, Yangzhou University, Yangzhou, 225009 China
| | - Jinjin Jiang
- grid.268415.cJiangsu Provincial Key Laboratory of Crop Genetics and Physiology, Yangzhou University, Yangzhou, 225009 China
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14
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Rajput R, Naik J, Stracke R, Pandey A. Interplay between R2R3 MYB-type activators and repressors regulates proanthocyanidin biosynthesis in banana (Musa acuminata). THE NEW PHYTOLOGIST 2022; 236:1108-1127. [PMID: 35842782 DOI: 10.1111/nph.18382] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Accepted: 07/11/2022] [Indexed: 06/15/2023]
Abstract
Proanthocyanidins are oligomeric flavonoids that promote plant disease resistance and benefit human health. Banana is one of the world's most extensively farmed crops and its fruit pulp contain proanthocyanidins. However, the transcriptional regulatory network that fine tunes proanthocyanidin biosynthesis in banana remains poorly understood. We characterised two proanthocyanidin-specific R2R3 MYB activators (MaMYBPA1-MaMYBPA2) and four repressors (MaMYBPR1-MaMYBPR4) to elucidate the mechanisms underlying the transcriptional regulation of proanthocyanidin biosynthesis in banana. Heterologous expression of MaMYBPA1 and MaMYBPA2 partially complemented the Arabidopsis thaliana proanthocyanidin-deficient transparent testa2 mutant. MaMYBPA1 and MaMYBPA2 interacted physically with MaMYCs to transactivate anthocyanin synthase, leucoanthocyanidin reductase, and anthocyanidin reductase genes in vitro and form functional MYB-bHLH-WD Repeat (MBW) complexes with MaTTG1 to transactivate these promoters in vivo. Overexpression of MaMYBPAs alone or with MaMYC in banana fruits induced proanthocyanidin accumulation and transcription of proanthocyanidin biosynthesis-related genes. MaMYBPR repressors are also shown to interact with MaMYCs forming repressing MBW complexes, and diminished proanthocyanidin accumulation. Interestingly overexpression of MaMYBPA induces the expression of MaMYBPR, indicating an agile regulation of proanthocyanidin biosynthesis through the formation of competitive MBW complexes. Our results reveal regulatory modules of R2R3 MYB- that fine tune proanthocyanidin biosynthesis and offer possible targets for genetic manipulation for nutritional improvement of banana.
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Affiliation(s)
- Ruchika Rajput
- National Institute of Plant Genome Research, Aruna Asaf Ali Marg, New Delhi, 110067, India
| | - Jogindra Naik
- National Institute of Plant Genome Research, Aruna Asaf Ali Marg, New Delhi, 110067, India
| | - 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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15
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Xia P, Hu W, Zheng Y, Wang Y, Yan K, Liang Z. Structural and interactions analysis of a transcription factor PnMYB2 in Panax notoginseng. JOURNAL OF PLANT PHYSIOLOGY 2022; 275:153756. [PMID: 35767909 DOI: 10.1016/j.jplph.2022.153756] [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: 01/11/2022] [Revised: 06/15/2022] [Accepted: 06/17/2022] [Indexed: 06/15/2023]
Abstract
The main active ingredients of the traditional Chinese medicinal plant, Panax notoginseng, are the Panax notoginseng saponins (PNS). They can be synthesized via the mevalonate pathway; PnSS and PnSE1 are the key rate-limiting enzymes in this pathway. In this study, an interaction between PnMYB2 and the key enzymes was identified and characterized from the P. notoginseng cDNA library using the Y1H technique. Subsequently, X-α-gal color reaction confirmed the interaction between PnMYB2 and the upstream sequences of PnSS and PnSE1 promoters. Full-length cDNA sequence of PnMYB2 was isolated and characterized. PnMYB2 has an open reading frame of 864 bp, encoding 287 amino acids. 3D structural analysis of PnMYB2 indicated that its structure was similar to that of the template. Phylogenetic analysis revealed that PnMYB2 and PgMYB2 are highly homologous and belong to the R2R3 MYB transcription factor (TF). Subcellular localization analysis showed that PnMYB2 was localized in the nucleus. The recombinant protein PnMYB2 was successfully obtained through prokaryotic expression and was confirmed to be an inclusion body protein. Furthermore, electrophoretic mobility shift assay (EMSA) experiments demonstrated that PnMYB2 specifically binds to MYB core and AC-rich elements. This study provides a theoretical basis for transcriptional regulation of saponin biosynthesis in P. notoginseng.
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Affiliation(s)
- Pengguo Xia
- Key Laboratory of Plant Secondary Metabolism and Regulation of Zhejiang Province, College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, 310018, China.
| | - Wanying Hu
- Key Laboratory of Plant Secondary Metabolism and Regulation of Zhejiang Province, College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, 310018, China
| | - Yujie Zheng
- Key Laboratory of Plant Secondary Metabolism and Regulation of Zhejiang Province, College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, 310018, China
| | - Yong Wang
- Institute of Sanqi Research, Wenshan University, Wenshan, 663000, China
| | - Kaijing Yan
- Tasly Pharmaceutical Group Co., Ltd, Tianjin, 300410, China
| | - Zongsuo Liang
- Key Laboratory of Plant Secondary Metabolism and Regulation of Zhejiang Province, College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, 310018, China
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16
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Liu S, Long J, Zhang L, Gao J, Dong T, Wang Y, Peng C. Arabidopsis sucrose transporter 4 (AtSUC4) is involved in high sucrose-mediated inhibition of root elongation. BIOTECHNOL BIOTEC EQ 2022. [DOI: 10.1080/13102818.2022.2101942] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022] Open
Affiliation(s)
- Siwen Liu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou, PR China
| | - Jianmei Long
- Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, PR China
| | - Liding Zhang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou, PR China
| | - Jiayu Gao
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou, PR China
| | - Tiantian Dong
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou, PR China
| | - Ying Wang
- Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, PR China
| | - Changcao Peng
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou, PR China
- Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, PR China
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17
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Analysis of TCP Transcription Factors Revealed Potential Roles in Plant Growth and Fusarium oxysporum f.sp. cubense Resistance in Banana (cv. Rasthali). Appl Biochem Biotechnol 2022; 194:5456-5473. [DOI: 10.1007/s12010-022-04065-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/24/2022] [Indexed: 11/02/2022]
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18
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Yang YY, Shan W, Yang TW, Wu CJ, Liu XC, Chen JY, Lu WJ, Li ZG, Deng W, Kuang JF. MaMYB4 is a negative regulator and a substrate of RING-type E3 ligases MaBRG2/3 in controlling banana fruit ripening. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2022; 110:1651-1669. [PMID: 35395128 DOI: 10.1111/tpj.15762] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Revised: 03/14/2022] [Accepted: 03/28/2022] [Indexed: 06/14/2023]
Abstract
Fruit ripening is a complex developmental process, which is modulated by both transcriptional and post-translational events. Control of fruit ripening is important in maintaining moderate quality traits and minimizing postharvest deterioration. In this study, we discovered that the transcription factor MaMYB4 acts as a negative regulator of fruit ripening in banana. The protein levels of MaMYB4 decreased gradually with banana fruit ripening, paralleling ethylene production, and decline in firmness. DNA affinity purification sequencing combined with RNA-sequencing analyses showed that MaMYB4 preferentially binds to the promoters of various ripening-associated genes including ethylene biosynthetic and cell wall modifying genes. Furthermore, ectopic expression of MaMYB4 in tomato delayed tomato fruit ripening, which was accompanied by downregulation of ethylene biosynthetic and cell wall modifying genes. Importantly, two RING finger E3 ligases MaBRG2/3, whose protein accumulation increased progressively with fruit ripening, were found to interact with and ubiquitinate MaMYB4, contributing to decreased accumulation of MaMYB4 during fruit ripening. Transient overexpression of MaMYB4 and MaBRG2/3 in banana fruit ripening delayed or promoted fruit ripening by inhibiting or stimulating ethylene biosynthesis, respectively. Taken together, we demonstrate that MaMYB4 negatively modulates banana fruit ripening, and that MaMYB4 abundance could be regulated by protein ubiquitination, thus providing insights into the role of MaMYB4 in controlling fruit ripening at both transcriptional and post-translational levels.
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Affiliation(s)
- Ying-Ying Yang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources/Guangdong Provincial Key Laboratory of Postharvest Science of Fruits and Vegetables/Engineering Research Center of Southern Horticultural Products Preservation, Ministry of Education, College of Horticultural Science, South China Agricultural University, Guangzhou, 510642, China
| | - Wei Shan
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources/Guangdong Provincial Key Laboratory of Postharvest Science of Fruits and Vegetables/Engineering Research Center of Southern Horticultural Products Preservation, Ministry of Education, College of Horticultural Science, South China Agricultural University, Guangzhou, 510642, China
| | - Tian-Wei Yang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources/Guangdong Provincial Key Laboratory of Postharvest Science of Fruits and Vegetables/Engineering Research Center of Southern Horticultural Products Preservation, Ministry of Education, College of Horticultural Science, South China Agricultural University, Guangzhou, 510642, China
| | - Chao-Jie Wu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources/Guangdong Provincial Key Laboratory of Postharvest Science of Fruits and Vegetables/Engineering Research Center of Southern Horticultural Products Preservation, Ministry of Education, College of Horticultural Science, South China Agricultural University, Guangzhou, 510642, China
| | - Xun-Cheng Liu
- Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, 510650, China
| | - Jian-Ye Chen
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources/Guangdong Provincial Key Laboratory of Postharvest Science of Fruits and Vegetables/Engineering Research Center of Southern Horticultural Products Preservation, Ministry of Education, College of Horticultural Science, South China Agricultural University, Guangzhou, 510642, China
| | - Wang-Jin Lu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources/Guangdong Provincial Key Laboratory of Postharvest Science of Fruits and Vegetables/Engineering Research Center of Southern Horticultural Products Preservation, Ministry of Education, College of Horticultural Science, South China Agricultural University, Guangzhou, 510642, China
| | - Zheng-Guo Li
- Key Laboratory of Plant Hormones and Development Regulation of Chongqing, School of Life Sciences, Chongqing University, Chongqing, 400044, China
| | - Wei Deng
- Key Laboratory of Plant Hormones and Development Regulation of Chongqing, School of Life Sciences, Chongqing University, Chongqing, 400044, China
| | - Jian-Fei Kuang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources/Guangdong Provincial Key Laboratory of Postharvest Science of Fruits and Vegetables/Engineering Research Center of Southern Horticultural Products Preservation, Ministry of Education, College of Horticultural Science, South China Agricultural University, Guangzhou, 510642, China
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Combined transcriptome and metabolome integrated analysis of Acer mandshuricum to reveal candidate genes involved in anthocyanin accumulation. Sci Rep 2021; 11:23148. [PMID: 34848790 PMCID: PMC8633053 DOI: 10.1038/s41598-021-02607-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Accepted: 11/18/2021] [Indexed: 12/28/2022] Open
Abstract
The red color formation of Acer mandshuricum leaves is caused by the accumulation of anthocyanins primarily, but the molecular mechanism researches which underlie anthocyanin biosynthesis in A. mandshuricum were still lacking. Therefore, we combined the transcriptome and metabolome and analyzed the regulatory mechanism and accumulation pattern of anthocyanins in three different leaf color states. In our results, 26 anthocyanins were identified. Notably, the metabolite cyanidin 3-O-glucoside was found that significantly correlated with the color formation, was the predominant metabolite in anthocyanin biosynthesis of A. mandshuricum. By the way, two key structural genes ANS (Cluster-20561.86285) and BZ1 (Cluster-20561.99238) in anthocyanidin biosynthesis pathway were significantly up-regulated in RL, suggesting that they might enhance accumulation of cyanidin 3-O-glucoside which is their downstream metabolite, and contributed the red formation of A. mandshuricum leaves. Additionally, most TFs (e.g., MYBs, bZIPs and bHLHs) were detected differentially expressed in three leaf color stages that could participate in anthocyanin accumulation. This study sheds light on the anthocyanin molecular regulation of anthocyanidin biosynthesis and accumulation underlying the different leaf color change periods in A. mandshuricum, and it could provide basic theory and new insight for the leaf color related genetic improvement of A. mandshuricum.
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Pang D, Liu Y, Sun Y, Tian Y, Chen L. Menghai Huangye, a novel albino tea germplasm with high theanine content and a high catechin index. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2021; 311:110997. [PMID: 34482909 DOI: 10.1016/j.plantsci.2021.110997] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Revised: 07/13/2021] [Accepted: 07/20/2021] [Indexed: 06/13/2023]
Abstract
Yunnan Province has a very wide diversity of tea germplasm resources. A variety of special tea germplasms with outstanding traits have been discovered, including tea germplasms with high anthocyanin content and low caffeine content. Albino tea cultivars generally have higher contents of theanine that contribute to the umami taste, and the quality of tea brewed from it is higher. The catechin index (CI), the ratio of dihydroxylated catechins (DIC) to trihydroxylated catechins (TRIC), is a crucial index of suitability for processing tea. In this study, the albino tea plant Menghai Huangye (MHHY) with yellow leaves was identified. Analysis of the biochemical components revealed that MHHY was enriched in theanine and the total catechins (TC) were lower than Yunkang 10 (YK10). In addition, the CI value of MHHY was extremely significantly higher than that of YK10. Metabolic profile of catechins and the related gene expression profile analysis found that the coordinated expression of the key branch genes F3'H and F3'5'Ha for the synthesis of DIC and TRIC in tea plant was closely related to the high CI and low TC of MHHY. Further analysis of the F3'H promoter showed that a 284-bp deletion mutation was present in the F3'H promoter of MHHY, containing the binding sites of the transcriptional repressor MYB4 involved in flavonoid metabolism, which might be an important reason for the up-regulated expression of F3'H in MHHY. Overall, this study provides a theoretical basis for understanding the characteristics of albino tea germplasm resources and efficiently utilizing high-CI tea germplasm resources.
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Affiliation(s)
- Dandan Pang
- Tea Research Institute, Yunnan Academy of Agricultural Sciences, Yunnan Provincial Key Laboratory of Tea Science, 2 Jingnan Road, Menghai, Yunnan, 666201, China.
| | - Yufei Liu
- Tea Research Institute, Yunnan Academy of Agricultural Sciences, Yunnan Provincial Key Laboratory of Tea Science, 2 Jingnan Road, Menghai, Yunnan, 666201, China.
| | - Yunnan Sun
- Tea Research Institute, Yunnan Academy of Agricultural Sciences, Yunnan Provincial Key Laboratory of Tea Science, 2 Jingnan Road, Menghai, Yunnan, 666201, China.
| | - Yiping Tian
- Tea Research Institute, Yunnan Academy of Agricultural Sciences, Yunnan Provincial Key Laboratory of Tea Science, 2 Jingnan Road, Menghai, Yunnan, 666201, China.
| | - Linbo Chen
- Tea Research Institute, Yunnan Academy of Agricultural Sciences, Yunnan Provincial Key Laboratory of Tea Science, 2 Jingnan Road, Menghai, Yunnan, 666201, China.
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21
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Anwar M, Chen L, Xiao Y, Wu J, Zeng L, Li H, Wu Q, Hu Z. Recent Advanced Metabolic and Genetic Engineering of Phenylpropanoid Biosynthetic Pathways. Int J Mol Sci 2021; 22:9544. [PMID: 34502463 PMCID: PMC8431357 DOI: 10.3390/ijms22179544] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 08/20/2021] [Accepted: 08/25/2021] [Indexed: 12/11/2022] Open
Abstract
The MYB transcription factors (TFs) are evolving as critical role in the regulation of the phenylpropanoid and tanshinones biosynthetic pathway. MYB TFs relate to a very important gene family, which are involved in the regulation of primary and secondary metabolisms, terpenoids, bioactive compounds, plant defense against various stresses and cell morphology. R2R3 MYB TFs contained a conserved N-terminal domain, but the domain at C-terminal sorts them different regarding their structures and functions. MYB TFs suppressors generally possess particular repressive motifs, such as pdLNLD/ELxiG/S and TLLLFR, which contribute to their suppression role through a diversity of complex regulatory mechanisms. A novel flower specific "NF/YWSV/MEDF/LW" conserved motif has a great potential to understand the mechanisms of flower development. In the current review, we summarize recent advanced progress of MYB TFs on transcription regulation, posttranscriptional, microRNA, conserved motif and propose directions to future prospective research. We further suggest there should be more focus on the investigation for the role of MYB TFs in microalgae, which has great potential for heterologous protein expression system for future perspectives.
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Affiliation(s)
- Muhammad Anwar
- Guangdong Technology Research Center for Marine Algal Bioengineering, Guangdong Key Laboratory of Plant Epigenetics, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen 518060, China; (M.A.); (L.C.); (Y.X.); (H.L.); (Q.W.)
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
| | - Liu Chen
- Guangdong Technology Research Center for Marine Algal Bioengineering, Guangdong Key Laboratory of Plant Epigenetics, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen 518060, China; (M.A.); (L.C.); (Y.X.); (H.L.); (Q.W.)
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
| | - Yibo Xiao
- Guangdong Technology Research Center for Marine Algal Bioengineering, Guangdong Key Laboratory of Plant Epigenetics, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen 518060, China; (M.A.); (L.C.); (Y.X.); (H.L.); (Q.W.)
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
| | - Jinsong Wu
- Shenzhen Key Laboratory of Marine Bioresource & Eco-Environmental Science, Longhua Innovation Institute for Biotechnology, Shenzhen University, Shenzhen 518060, China;
| | - Lihui Zeng
- College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou 350002, China;
| | - Hui Li
- Guangdong Technology Research Center for Marine Algal Bioengineering, Guangdong Key Laboratory of Plant Epigenetics, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen 518060, China; (M.A.); (L.C.); (Y.X.); (H.L.); (Q.W.)
| | - Qingyu Wu
- Guangdong Technology Research Center for Marine Algal Bioengineering, Guangdong Key Laboratory of Plant Epigenetics, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen 518060, China; (M.A.); (L.C.); (Y.X.); (H.L.); (Q.W.)
- Shenzhen Key Laboratory of Marine Bioresource & Eco-Environmental Science, Longhua Innovation Institute for Biotechnology, Shenzhen University, Shenzhen 518060, China;
| | - Zhangli Hu
- Guangdong Technology Research Center for Marine Algal Bioengineering, Guangdong Key Laboratory of Plant Epigenetics, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen 518060, China; (M.A.); (L.C.); (Y.X.); (H.L.); (Q.W.)
- Shenzhen Key Laboratory of Marine Bioresource & Eco-Environmental Science, Longhua Innovation Institute for Biotechnology, Shenzhen University, Shenzhen 518060, China;
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22
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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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Khusnutdinov E, Sukhareva A, Panfilova M, Mikhaylova E. Anthocyanin Biosynthesis Genes as Model Genes for Genome Editing in Plants. Int J Mol Sci 2021; 22:8752. [PMID: 34445458 PMCID: PMC8395717 DOI: 10.3390/ijms22168752] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Revised: 08/09/2021] [Accepted: 08/13/2021] [Indexed: 12/13/2022] Open
Abstract
CRISPR/Cas, one of the most rapidly developing technologies in the world, has been applied successfully in plant science. To test new nucleases, gRNA expression systems and other inventions in this field, several plant genes with visible phenotypic effects have been constantly used as targets. Anthocyanin pigmentation is one of the most easily identified traits, that does not require any additional treatment. It is also associated with stress resistance, therefore plants with edited anthocyanin genes might be of interest for agriculture. Phenotypic effect of CRISPR/Cas editing of PAP1 and its homologs, DFR, F3H and F3'H genes have been confirmed in several distinct plant species. DFR appears to be a key structural gene of anthocyanin biosynthesis, controlled by various transcription factors. There are still many promising potential model genes that have not been edited yet. Some of them, such as Delila, MYB60, HAT1, UGT79B2, UGT79B3 and miR156, have been shown to regulate drought tolerance in addition to anthocyanin biosynthesis. Genes, also involved in trichome development, such as TTG1, GLABRA2, MYBL2 and CPC, can provide increased visibility. In this review successful events of CRISPR/Cas editing of anthocyanin genes are summarized, and new model genes are proposed. It can be useful for molecular biologists and genetic engineers, crop scientists, plant genetics and physiologists.
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Affiliation(s)
| | | | | | - Elena Mikhaylova
- Institute of Biochemistry and Genetics, Ufa Federal Research Center RAS, Prospekt Oktyabrya 71, 450054 Ufa, Russia; (E.K.); (A.S.); (M.P.)
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Shi L, Chen X, Wang K, Yang M, Chen W, Yang Z, Cao S. MrMYB6 From Chinese Bayberry ( Myrica rubra) Negatively Regulates Anthocyanin and Proanthocyanidin Accumulation. FRONTIERS IN PLANT SCIENCE 2021; 12:685654. [PMID: 34220906 PMCID: PMC8253226 DOI: 10.3389/fpls.2021.685654] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Accepted: 05/27/2021] [Indexed: 05/06/2023]
Abstract
Anthocyanins and proanthocyanidins (PAs) are important flavonoids in Chinese bayberry (Morella rubra), which functions in fruit color and exhibits multiple health promoting and disease-preventing effects. To investigate the regulation of their biosynthesis in Chinese bayberries, we isolated and identified a subgroup 4 MYB transcription factor (TF), MrMYB6, and found MrMYB6 shared similar repressor domains with other MYB co-repressors of anthocyanin and PA biosynthesis after sequence analysis. Gene expression results revealed the transcripts of MrMYB6 were negatively correlated with the anthocyanin and insoluble PA contents and also with the gene expressions involved in anthocyanin biosynthesis and PA specific genes such as MrLAR and MrANR during the late ripening stages of bayberries. In addition, overexpression of MrMYB6 in tobacco inhibited the transcript levels of NtCHI, NtLAR, and NtANR2, resulting into a decline in the levels of anthocyanins and PAs in tobacco flowers. We further found that MrMYB6 interacted with MrbHLH1 and MrWD40-1 to form functional complexes that acted to directly repress the promoter activities of the PA-specific gene MrLAR and MrANR and the anthocyanin-specific gene MrANS and MrUFGT. Taken together, our results suggested that MrMYB6 might negatively regulate anthocyanin and PA accumulation in Chinese bayberry.
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Yin X, Zhang Y, Zhang L, Wang B, Zhao Y, Irfan M, Chen L, Feng Y. Regulation of MYB Transcription Factors of Anthocyanin Synthesis in Lily Flowers. FRONTIERS IN PLANT SCIENCE 2021; 12:761668. [PMID: 34925411 PMCID: PMC8672200 DOI: 10.3389/fpls.2021.761668] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Accepted: 10/28/2021] [Indexed: 05/13/2023]
Abstract
Flower color is the decisive factor that affects the commercial value of ornamental flowers. Therefore, it is important to study the regulation of flower color formation in lily to discover the positive and negative factors that regulate this important trait. In this study, MYB transcription factors (TFs) were characterized to understand the regulatory mechanism of anthocyanin biosynthesis in lily. Two R2R3-MYB TFs, LvMYB5, and LvMYB1, were found to regulate anthocyanin biosynthesis in lily flowers. LvMYB5, which has an activation motif, belongs to the SG6 MYB protein subgroup of Arabidopsis thaliana. Transient expression of LvMYB5 indicated that LvMYB5 can promote coloration in Nicotiana benthamiana leaves, and that expression of LvMYB5 increases the expression levels of NbCHS, NbDFR, and NbANS. VIGS experiments in lily petals showed that the accumulation of anthocyanins was reduced when LvMYB5 was silenced. Luciferase assays showed that LvMYB5 can promote anthocyanin synthesis by activating the ANS gene promoter. Therefore, LvMYB5 plays an important role in flower coloration in lily. In addition, the transient expression experiment provided preliminary evidence that LvMYB1 (an R2R3-MYB TF) inhibits anthocyanin synthesis in lily flowers. The discovery of activating and inhibitory factors related to anthocyanin biosynthesis in lily provides a theoretical basis for improving flower color through genetic engineering. The results of our study provide a new direction for the further study of the mechanisms of flower color formation in lilies.
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Affiliation(s)
- Xiaojuan Yin
- Plant Protection College, Shenyang Agricultural University, Shenyang, China
| | - Yibing Zhang
- Key Laboratory of Agriculture Biotechnology, College of Biosciences and Biotechnology, Shenyang Agricultural University, Shenyang, China
| | - Li Zhang
- Key Laboratory of Agriculture Biotechnology, College of Biosciences and Biotechnology, Shenyang Agricultural University, Shenyang, China
- Key Laboratory of Protected Horticulture (Ministry of Education), College of Horticulture, Shenyang Agricultural University, Shenyang, China
| | - Baohua Wang
- Key Laboratory of Agriculture Biotechnology, College of Biosciences and Biotechnology, Shenyang Agricultural University, Shenyang, China
| | - Yidi Zhao
- Key Laboratory of Agriculture Biotechnology, College of Biosciences and Biotechnology, Shenyang Agricultural University, Shenyang, China
| | - Muhammad Irfan
- Department of Biotechnology, Faculty of Science, University of Sargodha, Sargodha, Pakistan
| | - Lijing Chen
- Key Laboratory of Agriculture Biotechnology, College of Biosciences and Biotechnology, Shenyang Agricultural University, Shenyang, China
- Key Laboratory of Protected Horticulture (Ministry of Education), College of Horticulture, Shenyang Agricultural University, Shenyang, China
- *Correspondence: Lijing Chen, ;
| | - Yulong Feng
- Plant Protection College, Shenyang Agricultural University, Shenyang, China
- Key Laboratory of Agriculture Biotechnology, College of Biosciences and Biotechnology, Shenyang Agricultural University, Shenyang, China
- Yulong Feng, ;
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