1
|
Simiyu DC, Bayaraa U, Jang JH, Lee OR. The R2R3-MYB transcription factor PgTT2 from Panax ginseng interacts with the WD40-repeat protein PgTTG1 during the regulation of proanthocyanidin biosynthesis and the response to salt stress. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2024; 214:108877. [PMID: 38950460 DOI: 10.1016/j.plaphy.2024.108877] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2024] [Revised: 06/22/2024] [Accepted: 06/25/2024] [Indexed: 07/03/2024]
Abstract
Proanthocyanidins (PAs) are flavonoid compounds with important defensive roles in plants. The application of PAs in industries such as the pharmaceutical industry has led to increased interest in enhancing their biosynthesis. In Arabidopsis thaliana, PAs are biosynthesized under the regulation of an R2R3-MYB transcription factor TRANSPARENT TESTA 2 (TT2), which can interact with other proteins, including TRANSPARENT TESTA GLABRA 1 (TTG1), while also regulating a plant's response to abiotic stressors. However, the regulation of PA biosynthesis in the high-value medicinal plant Panax ginseng (ginseng) has not yet been studied. Understanding the mechanism of PAs biosynthesis regulation in ginseng may be helpful in increasing the plant's range of pharmacological applications. This study found that the overexpression of PgTT2 increased PA biosynthesis by an average of 67.3% in ginseng adventitious roots and 50.5% in arabidopsis seeds. Furthermore, transgenic arabidopsis plants overexpressing PgTT2 produced increased reactive oxygen species (ROS) scavenging ability by influencing abscisic acid synthesis and signaling. However, under high salinity stress, seed germination and growth rate of seedlings were decreased. An expression analysis of plants facing salt stress revealed increased transcripts of an ABA biosynthetic gene, NCED3, and ABA signaling genes ABI5 and ABI3. Moreover, the PgTT2 protein showed a direct interaction with PgTTG1 in yeast two-hybrid assays. This study therefore reveals novel information on the transcriptional regulation of PA production in ginseng and shows how PgTT2 influences the ABA response pathway to regulate responses to ROS and salt stress.
Collapse
Affiliation(s)
- David Charles Simiyu
- Department of Applied Plant Science, College of Agriculture and Life Science, Chonnam National University, Gwangju, 61186, Republic of Korea; Interdisciplinary Program in IT-Bio Convergence System, Chonnam National University, Gwangju, 61186, Republic of Korea; Botany Department, College of Natural and Applied Sciences, University of Dar es Salaam, P.O. Box 35091, Dar es Salaam, Tanzania
| | - Unenzaya Bayaraa
- Department of Applied Plant Science, College of Agriculture and Life Science, Chonnam National University, Gwangju, 61186, Republic of Korea; Interdisciplinary Program in IT-Bio Convergence System, Chonnam National University, Gwangju, 61186, Republic of Korea
| | - Jin Hoon Jang
- Department of Applied Plant Science, College of Agriculture and Life Science, Chonnam National University, Gwangju, 61186, Republic of Korea; Interdisciplinary Program in IT-Bio Convergence System, Chonnam National University, Gwangju, 61186, Republic of Korea
| | - Ok Ran Lee
- Department of Applied Plant Science, College of Agriculture and Life Science, Chonnam National University, Gwangju, 61186, Republic of Korea; Interdisciplinary Program in IT-Bio Convergence System, Chonnam National University, Gwangju, 61186, Republic of Korea; Institute of Synthetic Biology for Carbon Neutralization, Chonnam National University, Gwangju, 61186, Republic of Korea.
| |
Collapse
|
2
|
Zhang J, Han N, Zhao A, Wang Z, Wang D. ZbMYB111 Expression Positively Regulates ZbUFGT-Mediated Anthocyanin Biosynthesis in Zanthoxylum bungeanum with the Involvement of ZbbHLH2. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:16941-16954. [PMID: 39024128 DOI: 10.1021/acs.jafc.3c08579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/20/2024]
Abstract
Anthocyanin (ACN)-derived pigmentation in the red Zanthoxylum bungeanum peel is an essential commercial trait. Therefore, exploring the metabolic regulatory networks involved in peel ACN levels in this species is crucial for improving its quality. However, its underlying transcriptional regulatory mechanisms are still unknown. This transcriptomic and bioinformatics study not only discovered a new TF (ZbMYB111) as a potential regulator for ACN biosynthesis in Z. bungeanum peel, but also deciphered the underlying molecular mechanisms of ACN biosynthesis. Overexpression of ZbMYB111 and flavonoid 3-O-glucosyltransferase (ZbUFGT) induced ACN accumulation in both Z. bungeanum peels and callus along with Arabidopsis thaliana and tobacco flowers, whereas their silencing impaired ACN biosynthesis. Therefore, the dual-luciferase reporter, yeast-one-hybrid, and electrophoretic mobility shift assays showed that ZbMYB111 directly interacted with the ZbUFGT promoter to activate its expression. This diverted the secondary metabolism toward the ACN pathway, thereby promoting ACN accumulation.
Collapse
Affiliation(s)
- Jie Zhang
- College of Forestry, Northwest A&F University, Yangling 712100, China
- Shaanxi Key Laboratory of Economic Plant Resources Development and Utilization, Yangling 712100, China
| | - Nuan Han
- College of Forestry, Northwest A&F University, Yangling 712100, China
- Shaanxi Key Laboratory of Economic Plant Resources Development and Utilization, Yangling 712100, China
| | - Aiguo Zhao
- College of Forestry, Northwest A&F University, Yangling 712100, China
- Shaanxi Key Laboratory of Economic Plant Resources Development and Utilization, Yangling 712100, China
| | - Ziyi Wang
- College of Forestry, Northwest A&F University, Yangling 712100, China
- Shaanxi Key Laboratory of Economic Plant Resources Development and Utilization, Yangling 712100, China
| | - Dongmei Wang
- College of Forestry, Northwest A&F University, Yangling 712100, China
- Shaanxi Key Laboratory of Economic Plant Resources Development and Utilization, Yangling 712100, China
| |
Collapse
|
3
|
Wang Y, Li S, Shi Y, Lv S, Zhu C, Xu C, Zhang B, Allan AC, Grierson D, Chen K. The R2R3 MYB Ruby1 is activated by two cold responsive ethylene response factors, via the retrotransposon in its promoter, to positively regulate anthocyanin biosynthesis in citrus. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2024. [PMID: 38922743 DOI: 10.1111/tpj.16866] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Revised: 03/07/2024] [Accepted: 04/08/2024] [Indexed: 06/28/2024]
Abstract
Anthocyanins are natural pigments and dietary antioxidants that play multiple biological roles in plants and are important in animal and human nutrition. Low temperature (LT) promotes anthocyanin biosynthesis in many species including blood orange. A retrotransposon in the promoter of Ruby1, which encodes an R2R3 MYB transcription factor, controls cold-induced anthocyanin accumulation in blood orange flesh. However, the specific mechanism remains unclear. In this study, we characterized two LT-induced ETHYLENE RESPONSE FACTORS (CsERF054 and CsERF061). Both CsERF054 and CsERF061 can activate the expression of CsRuby1 by directly binding to a DRE/CRT cis-element within the retrotransposon in the promoter of CsRuby1, thereby positively regulating anthocyanin biosynthesis. Further investigation indicated that CsERF061 also forms a protein complex with CsRuby1 to co-activate the expression of anthocyanin biosynthetic genes, providing a dual mechanism for the upregulation of the anthocyanin pathway. These results provide insights into how LT mediates anthocyanin biosynthesis and increase the understanding of the regulatory network of anthocyanin biosynthesis in blood orange.
Collapse
Affiliation(s)
- Yuxin Wang
- College of Agriculture and Biotechnology, Zhejiang University, Zijingang Campus, Hangzhou, 310058, P.R. China
| | - Shaojia Li
- College of Agriculture and Biotechnology, Zhejiang University, Zijingang Campus, Hangzhou, 310058, P.R. China
- Zhejiang Provincial Key Laboratory of Horticultural Crop Quality Manipulation, Zhejiang University, Zijingang Campus, Hangzhou, 310058, P.R. China
- The State Agriculture Ministry Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Zhejiang University, Zijingang Campus, Hangzhou, 310058, P.R. China
| | - Yanna Shi
- College of Agriculture and Biotechnology, Zhejiang University, Zijingang Campus, Hangzhou, 310058, P.R. China
- Zhejiang Provincial Key Laboratory of Horticultural Crop Quality Manipulation, Zhejiang University, Zijingang Campus, Hangzhou, 310058, P.R. China
- The State Agriculture Ministry Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Zhejiang University, Zijingang Campus, Hangzhou, 310058, P.R. China
| | - Shouzheng Lv
- College of Agriculture and Biotechnology, Zhejiang University, Zijingang Campus, Hangzhou, 310058, P.R. China
| | - Changqing Zhu
- College of Agriculture and Biotechnology, Zhejiang University, Zijingang Campus, Hangzhou, 310058, P.R. China
- Zhejiang Provincial Key Laboratory of Horticultural Crop Quality Manipulation, Zhejiang University, Zijingang Campus, Hangzhou, 310058, P.R. China
- The State Agriculture Ministry Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Zhejiang University, Zijingang Campus, Hangzhou, 310058, P.R. China
| | - Changjie Xu
- College of Agriculture and Biotechnology, Zhejiang University, Zijingang Campus, Hangzhou, 310058, P.R. China
- Zhejiang Provincial Key Laboratory of Horticultural Crop Quality Manipulation, Zhejiang University, Zijingang Campus, Hangzhou, 310058, P.R. China
- The State Agriculture Ministry Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Zhejiang University, Zijingang Campus, Hangzhou, 310058, P.R. China
| | - Bo Zhang
- College of Agriculture and Biotechnology, Zhejiang University, Zijingang Campus, Hangzhou, 310058, P.R. China
- Zhejiang Provincial Key Laboratory of Horticultural Crop Quality Manipulation, Zhejiang University, Zijingang Campus, Hangzhou, 310058, P.R. China
- The State Agriculture Ministry Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Zhejiang University, Zijingang Campus, Hangzhou, 310058, P.R. China
| | - Andrew C Allan
- New Zealand Institute for Plant and Food Research Limited, Private Bag 92169, Auckland, New Zealand
- School of Biological Sciences, University of Auckland, Auckland, New Zealand
| | - Donald Grierson
- Division of Plant and Crop Science, School of Biosciences, University of Nottingham, Nottingham, UK
| | - Kunsong Chen
- College of Agriculture and Biotechnology, Zhejiang University, Zijingang Campus, Hangzhou, 310058, P.R. China
- Zhejiang Provincial Key Laboratory of Horticultural Crop Quality Manipulation, Zhejiang University, Zijingang Campus, Hangzhou, 310058, P.R. China
- The State Agriculture Ministry Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Zhejiang University, Zijingang Campus, Hangzhou, 310058, P.R. China
| |
Collapse
|
4
|
Li H, Yang Y, Zhang W, Zheng H, Xu X, Li H, Sun C, Hu H, Zhao W, Ma R, Tao J. Promoter replication of grape MYB transcription factor is associated with a new red flesh phenotype. PLANT CELL REPORTS 2024; 43:136. [PMID: 38709311 DOI: 10.1007/s00299-024-03225-8] [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: 12/10/2023] [Accepted: 04/30/2024] [Indexed: 05/07/2024]
Abstract
KEY MESSAGE In our study, we discovered a fragment duplication autoregulation mechanism in 'ZS-HY', which may be the reason for the phenotype of red foliage and red flesh in grapes. In grapes, MYBA1 and MYBA2 are the main genetic factors responsible for skin coloration which are located at the color loci on chromosome 2, but the exact genes responsible for color have not been identified in the flesh. We used a new teinturier grape germplasm 'ZhongShan-HongYu' (ZS-HY) which accumulate anthocyanin both in skin and flesh as experimental materials. All tissues of 'ZS-HY' contained cyanidin 3-O-(6″-p-coumaroyl glucoside), and pelargonidins were detected in skin, flesh, and tendril. Through gene expression analysis at different stage of flesh, significant differences in the expression levels of VvMYBA1 were found. Gene amplification analysis showed that the VvMYBA1 promoter is composed of two alleles, VvMYBA1a and 'VvMYBA1c-like'. An insertion of a 408 bp repetitive fragment was detected in the allele 'VvMYBA1c-like'. In this process, we found the 408 bp repetitive fragment was co-segregated with red flesh and foliage phenotype. Our results revealed that the 408 bp fragment replication insertion in promoter of 'VvMYBA1c-like' was the target of its protein, and the number of repeat fragments was related to the increase of trans-activation of VvMYBA1 protein. The activation of promoter by VvMYBA1 was enhanced by the addition of VvMYC1. In addition, VvMYBA1 interacted with VvMYC1 to promote the expression of VvGT1 and VvGST4 genes in 'ZS-HY'. The discovery of this mutation event provides new insights into the regulation of VvMYBA1 on anthocyanin accumulation in red-fleshed grape, which is of great significance for molecular breeding of red-fleshed table grapes.
Collapse
Affiliation(s)
- Hui Li
- College of Horticulture, Sanya Institute of Nanjing Agricultural University, Nanjing Agricultural University, Nanjing, 210095, China
- College of Seed and Facility Agricultural Engineering, Weifang University, Weifang, 261061, China
| | - Yaxin Yang
- College of Horticulture, Sanya Institute of Nanjing Agricultural University, Nanjing Agricultural University, Nanjing, 210095, China
| | - Wen Zhang
- Institute of Horticultural Crops, Xinjiang Academy of Agricultural Science, Urumqi, 830001, Xinjiang, China
| | - Huan Zheng
- College of Horticulture, Sanya Institute of Nanjing Agricultural University, Nanjing Agricultural University, Nanjing, 210095, China
| | - Xianbin Xu
- College of Horticulture, Sanya Institute of Nanjing Agricultural University, Nanjing Agricultural University, Nanjing, 210095, China
| | - Haoran Li
- College of Horticulture, Sanya Institute of Nanjing Agricultural University, Nanjing Agricultural University, Nanjing, 210095, China
| | - Chenxu Sun
- College of Horticulture, Sanya Institute of Nanjing Agricultural University, Nanjing Agricultural University, Nanjing, 210095, China
| | - Haipeng Hu
- College of Horticulture, Sanya Institute of Nanjing Agricultural University, Nanjing Agricultural University, Nanjing, 210095, China
| | - Wanli Zhao
- College of Horticulture, Sanya Institute of Nanjing Agricultural University, Nanjing Agricultural University, Nanjing, 210095, China
| | - Ruiyang Ma
- College of Horticulture, Sanya Institute of Nanjing Agricultural University, Nanjing Agricultural University, Nanjing, 210095, China
| | - Jianmin Tao
- College of Horticulture, Sanya Institute of Nanjing Agricultural University, Nanjing Agricultural University, Nanjing, 210095, China.
- Institute of Horticultural Crops, Xinjiang Academy of Agricultural Science, Urumqi, 830001, Xinjiang, China.
| |
Collapse
|
5
|
Kim G, Cho H, Kim S. Identification of a candidate gene for the I locus determining the dominant white bulb color in onion (Allium cepa L.). TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 2024; 137:118. [PMID: 38709404 DOI: 10.1007/s00122-024-04626-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2024] [Accepted: 04/14/2024] [Indexed: 05/07/2024]
Abstract
KEY MESSAGE Through a map-based cloning approach, a gene coding for an R2R3-MYB transcription factor was identified as a causal gene for the I locus controlling the dominant white bulb color in onion. White bulb colors in onion (Allium cepa L.) are determined by either the C or I loci. The causal gene for the C locus was previously isolated, but the gene responsible for the I locus has not been identified yet. To identify candidate genes for the I locus, an approximately 7-Mb genomic DNA region harboring the I locus was obtained from onion and bunching onion (A. fistulosum) whole genome sequences using two tightly linked molecular markers. Within this interval, the AcMYB1 gene, known as a positive regulator of anthocyanin production, was identified. No polymorphic sequences were found between white and red AcMYB1 alleles in the 4,860-bp full-length genomic DNA sequences. However, a 4,838-bp LTR-retrotransposon was identified in the white allele, in the 79-bp upstream coding region from the stop codon. The insertion of this LTR-retrotransposon created a premature stop codon, resulting in the replacement of 26 amino acids with seven different residues. A molecular marker was developed based on the insertion of this LTR-retrotransposon to genotype the I locus. A perfect linkage between bulb color phenotypes and marker genotypes was observed among 5,303 individuals of segregating populations. The transcription of AcMYB1 appeared to be normal in both red and white onions, but the transcription of CHS-A, which encodes chalcone synthase and is involved in the first step of the anthocyanin biosynthesis pathway, was inactivated in the white onions. Taken together, an aberrant AcMYB1 protein produced from the mutant allele might be responsible for the dominant white bulb color in onions.
Collapse
Affiliation(s)
- Geonjoong Kim
- Department of Horticulture, Biotechnology Research Institute, Chonnam National University, Gwangju, 61186, Republic of Korea
| | - Heejung Cho
- Genomics Division, National Institute of Agricultural Sciences, RDA, Jeonju, 54874, Republic of Korea
| | - Sunggil Kim
- Department of Horticulture, Biotechnology Research Institute, Chonnam National University, Gwangju, 61186, Republic of Korea.
| |
Collapse
|
6
|
Wang D, Liu G, Yang J, Shi G, Niu Z, Liu H, Xu N, Wang L. Integrated metabolomics and transcriptomics reveal molecular mechanisms of corolla coloration in Rhododendron dauricum L. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2024; 207:108438. [PMID: 38367387 DOI: 10.1016/j.plaphy.2024.108438] [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: 10/07/2023] [Revised: 01/25/2024] [Accepted: 02/13/2024] [Indexed: 02/19/2024]
Abstract
Rhododendron dauricum L. is a semi-evergreen shrub of high ornamental and medicinal values in Northeast China. To study the molecular mechanisms of corolla coloration in R. dauricum, integrated metabolomics and transcriptomics were performed in R. dauricum featuring purple flowers and R. dauricum var. album featuring white flowers. Comparative metabolomics revealed 25 differential metabolites in the corolla of the two distinct colors, enriched in flavonoids that are closely related to pigmentation in the flower. Differential analysis of the transcriptomics data revealed enrichment of structural genes for flavonoid biosynthesis (99 up- and 58 down-regulated, respectively, in purple corollas compared to white ones). Significantly, CHS and CHI, key genes in the early stage of anthocyanin synthesis, as well as F3H, F3'H, F3'5'H, DFR, ANS, and UFGT that promote the accumulation of pigments in the late stage of anthocyanin synthesis, were up-regulated in R. dauricum (purple color). In R. dauricum var. album, FLS were key genes determining the accumulation of flavonols. In addition, transcriptome-metabolome correlation analysis identified 16 R2R3 MYB transcription factors (out of 83 MYBs) that are important for corolla coloration. Five negative and four positive MYBs were further identified by integrated transcriptional and metabolic network analysis, revealing a key role of MYBA and MYB12 in regulating anthocyanins and flavonols, respectively. Moreover, we validated the function of RdMYBA by creating stable transgenic plants and found that RdMYBA promotes anthocyanin biosynthesis. In summary, we systematically characterized the transcriptome and metabolome of two R. dauricum cultivars with different flower colors and identified MYBs as key factors in modulating corolla coloration.
Collapse
Affiliation(s)
- Dan Wang
- Institute of Forestry, Heilongjiang Academy of Forestry, Harbin, 150081, China
| | - Guiling Liu
- College of Landscape Architecture, Northeast Forestry University, Harbin, 150040, China
| | - Juan Yang
- College of Landscape Architecture, Northeast Forestry University, Harbin, 150040, China
| | - Gongfa Shi
- College of Landscape Architecture, Northeast Forestry University, Harbin, 150040, China
| | - Zhaoqian Niu
- College of Landscape Architecture, Northeast Forestry University, Harbin, 150040, China
| | - Huijun Liu
- College of Landscape Architecture, Northeast Forestry University, Harbin, 150040, China
| | - Nuo Xu
- College of Landscape Architecture, Northeast Forestry University, Harbin, 150040, China
| | - Ling Wang
- College of Landscape Architecture, Northeast Forestry University, Harbin, 150040, China.
| |
Collapse
|
7
|
Yang Y, Wu Z, Wu Z, Li T, Shen Z, Zhou X, Wu X, Li G, Zhang Y. A near-complete assembly of asparagus bean provides insights into anthocyanin accumulation in pods. PLANT BIOTECHNOLOGY JOURNAL 2023; 21:2473-2489. [PMID: 37558431 PMCID: PMC10651155 DOI: 10.1111/pbi.14142] [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: 11/17/2022] [Revised: 07/11/2023] [Accepted: 07/23/2023] [Indexed: 08/11/2023]
Abstract
Asparagus bean (Vigna unguiculata ssp. sesquipedialis), a subspecies of V. unguiculata, is a vital legume crop widely cultivated in Asia for its tender pods consumed as vegetables. However, the existing asparagus bean assemblies still contain numerous gaps and unanchored sequences, which presents challenges to functional genomics research. Here, we present an improved reference genome sequence of an elite asparagus bean variety, Fengchan 6, achieved through the integration of nanopore ultra-long reads, PacBio high-fidelity reads, and Hi-C technology. The improved assembly is 521.3 Mb in length and demonstrates several enhancements, including a higher N50 length (46.4 Mb), an anchor ratio of 99.8%, and the presence of only one gap. Furthermore, we successfully assembled 14 telomeres and all 11 centromeres, including four telomere-to-telomere chromosomes. Remarkably, the centromeric regions cover a total length of 38.1 Mb, providing valuable insights into the complex architecture of centromeres. Among the 30 594 predicted protein-coding genes, we identified 2356 genes that are tandemly duplicated in segmental duplication regions. These findings have implications for defence responses and may contribute to evolutionary processes. By utilizing the reference genome, we were able to effectively identify the presence of the gene VuMYB114, which regulates the accumulation of anthocyanins, thereby controlling the purple coloration of the pods. This discovery holds significant implications for understanding the underlying mechanisms of color determination and the breeding process. Overall, the highly improved reference genome serves as crucial resource and lays a solid foundation for asparagus bean genomic studies and genetic improvement efforts.
Collapse
Affiliation(s)
- Yi Yang
- Vegetable Research InstituteGuangdong Academy of Agricultural SciencesGuangzhouChina
- Guangdong Key Laboratory for New Technology Research of VegetablesGuangzhouChina
| | - Zhikun Wu
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic CenterSun Yat‐Sen UniversityGuangzhouChina
| | - Zengxiang Wu
- Vegetable Research InstituteGuangdong Academy of Agricultural SciencesGuangzhouChina
- Guangdong Key Laboratory for New Technology Research of VegetablesGuangzhouChina
| | - Tinyao Li
- Vegetable Research InstituteGuangdong Academy of Agricultural SciencesGuangzhouChina
- Guangdong Key Laboratory for New Technology Research of VegetablesGuangzhouChina
| | - Zhuo Shen
- Vegetable Research InstituteGuangdong Academy of Agricultural SciencesGuangzhouChina
- Guangdong Key Laboratory for New Technology Research of VegetablesGuangzhouChina
| | - Xuan Zhou
- Vegetable Research InstituteGuangdong Academy of Agricultural SciencesGuangzhouChina
- Guangdong Key Laboratory for New Technology Research of VegetablesGuangzhouChina
| | - Xinyi Wu
- Institute of VegetableZhejiang Academy of Agricultural SciencesHangzhouChina
| | - Guojing Li
- Institute of VegetableZhejiang Academy of Agricultural SciencesHangzhouChina
| | - Yan Zhang
- Vegetable Research InstituteGuangdong Academy of Agricultural SciencesGuangzhouChina
- Guangdong Key Laboratory for New Technology Research of VegetablesGuangzhouChina
| |
Collapse
|
8
|
Feng S, Hou K, Zhang H, Chen C, Huang J, Wu Q, Zhang Z, Gao Y, Wu X, Wang H, Shen C. Investigation of the role of TmMYB16/123 and their targets (TmMTP1/11) in the tolerance of Taxus media to cadmium. TREE PHYSIOLOGY 2023; 43:1009-1022. [PMID: 36808461 DOI: 10.1093/treephys/tpad019] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2022] [Accepted: 02/13/2023] [Indexed: 06/11/2023]
Abstract
The toxicity and stress caused by heavy metal contamination has become an important constraint to the growth and flourishing of trees. In particular, species belonging to the genus Taxus, which are the only natural source for the anti-tumor medicine paclitaxel, are known to be highly sensitive to environmental changes. To investigate the response of Taxus spp. to heavy metal stress, we analyzed the transcriptomic profiles of Taxus media trees exposed to cadmium (Cd2+). In total, six putative genes from the metal tolerance protein (MTP) family were identified in T. media, including two Cd2+ stress inducible TMP genes (TmMTP1, TmMTP11 and Taxus media). Secondary structure analyses predicted that TmMTP1 and TmMTP11, which are members of the Zn-CDF and Mn-CDF subfamily proteins, respectively, contained six and four classic transmembrane domains, respectively. The introduction of TmMTP1/11 into the ∆ycf1 yeast cadmium-sensitive mutant strain showed that TmMTP1/11 might regulate the accumulation of Cd2+ to yeast cells. To screen the upstream regulators, partial promoter sequences of the TmMTP1/11 genes were isolated using the chromosome walking method. Several myeloblastosis (MYB) recognition elements were identified in the promoters of these genes. Furthermore, two Cd2+-induced R2R3-MYB TFs, TmMYB16 and TmMYB123, were identified. Both in vitro and in vivo assays confirmed that TmMTB16/123 play a role in Cd2+ tolerance by activating and repressing the expression of TmMTP1/11 genes. The present study elucidated new regulatory mechanisms underlying the response to Cd stress and can contribute to the breeding of Taxus species with high environmental adaptability.
Collapse
Affiliation(s)
- Shangguo Feng
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 311121, China
- Zhejiang Provincial Key Laboratory for Genetic Improvement and Quality Control of Medicinal Plants, Hangzhou Normal University, Hangzhou 311121, China
| | - Kailin Hou
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 311121, China
- Zhejiang Provincial Key Laboratory for Genetic Improvement and Quality Control of Medicinal Plants, Hangzhou Normal University, Hangzhou 311121, China
| | - Hongshan Zhang
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 311121, China
- Zhejiang Provincial Key Laboratory for Genetic Improvement and Quality Control of Medicinal Plants, Hangzhou Normal University, Hangzhou 311121, China
| | - Cheng Chen
- College of Pharmacy, Hangzhou Normal University, Hangzhou 311121, China
| | - Jiefang Huang
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 311121, China
- Zhejiang Provincial Key Laboratory for Genetic Improvement and Quality Control of Medicinal Plants, Hangzhou Normal University, Hangzhou 311121, China
| | - Qicong Wu
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 311121, China
- Zhejiang Provincial Key Laboratory for Genetic Improvement and Quality Control of Medicinal Plants, Hangzhou Normal University, Hangzhou 311121, China
| | - Zhenhao Zhang
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 311121, China
- Zhejiang Provincial Key Laboratory for Genetic Improvement and Quality Control of Medicinal Plants, Hangzhou Normal University, Hangzhou 311121, China
| | - Yadi Gao
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 311121, China
- Zhejiang Provincial Key Laboratory for Genetic Improvement and Quality Control of Medicinal Plants, Hangzhou Normal University, Hangzhou 311121, China
| | - Xiaomei Wu
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 311121, China
| | - Huizhong Wang
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 311121, China
- Zhejiang Provincial Key Laboratory for Genetic Improvement and Quality Control of Medicinal Plants, Hangzhou Normal University, Hangzhou 311121, China
| | - Chenjia Shen
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 311121, China
- Zhejiang Provincial Key Laboratory for Genetic Improvement and Quality Control of Medicinal Plants, Hangzhou Normal University, Hangzhou 311121, China
| |
Collapse
|
9
|
Chen X, Wu Y, Yu Z, Gao Z, Ding Q, Shah SHA, Lin W, Li Y, Hou X. BcMYB111 Responds to BcCBF2 and Induces Flavonol Biosynthesis to Enhance Tolerance under Cold Stress in Non-Heading Chinese Cabbage. Int J Mol Sci 2023; 24:ijms24108670. [PMID: 37240015 DOI: 10.3390/ijms24108670] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Revised: 05/08/2023] [Accepted: 05/10/2023] [Indexed: 05/28/2023] Open
Abstract
Flavonols have been shown to respond to a variety of abiotic stresses in plants, including cold stress. Higher total flavonoid content was found in non-heading Chinese cabbage (NHCC, Brassica campestris (syn. Brassica rapa) ssp. chinensis) after cold stress. A non-targeted metabolome analysis showed a significant increase in flavonol content, including that of quercetin and kaempferol. Here, we found that an R2R3-MYB transcription factor, BcMYB111, may play a role in this process. BcMYB111 was up-regulated in response to cold treatment, with an accompanying accumulation of flavonols. Then, it was found that BcMYB111 could regulate the synthesis of flavonols by directly binding to the promoters of BcF3H and BcFLS1. In the transgenic hairy roots of NHCC or stable transgenic Arabidopsis, overexpression of BcMYB111 increased flavonol synthesis and accumulation, while these were reduced in virus-induced gene silencing lines in NHCC. After cold stress, the higher proline content and lower malondialdehyde (MDA) content showed that there was less damage in transgenic Arabidopsis than in the wild-type (WT). The BcMYB111 transgenic lines performed better in terms of antioxidant capacity because of their lower H2O2 content and higher superoxide dismutase (SOD) and peroxidase (POD) enzyme activities. In addition, a key cold signaling gene, BcCBF2, could specifically bind to the DRE element and activate the expression of BcMYB111 in vitro and in vivo. The results suggested that BcMYB111 played a positive role in enhancing the flavonol synthesis and cold tolerance of NHCC. Taken together, these findings reveal that cold stress induces the accumulation of flavonols to increase tolerance via the pathway of BcCBF2-BcMYB111-BcF3H/BcFLS1 in NHCC.
Collapse
Affiliation(s)
- Xiaoshan Chen
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (East China), Engineering Research Center of Germplasm Enhancement and Utilization of Horticultural Crops, Nanjing Agricultural University, Nanjing 210095, China
| | - Ying Wu
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (East China), Engineering Research Center of Germplasm Enhancement and Utilization of Horticultural Crops, Nanjing Agricultural University, Nanjing 210095, China
| | - Zhanghong Yu
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (East China), Engineering Research Center of Germplasm Enhancement and Utilization of Horticultural Crops, Nanjing Agricultural University, Nanjing 210095, China
| | - Zhanyuan Gao
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (East China), Engineering Research Center of Germplasm Enhancement and Utilization of Horticultural Crops, Nanjing Agricultural University, Nanjing 210095, China
- Nanjing Suman Plasma Engineering Research Institute Co., Ltd., Nanjing 211162, China
| | - Qiang Ding
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (East China), Engineering Research Center of Germplasm Enhancement and Utilization of Horticultural Crops, Nanjing Agricultural University, Nanjing 210095, China
| | - Sayyed Hamad Ahmad Shah
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (East China), Engineering Research Center of Germplasm Enhancement and Utilization of Horticultural Crops, Nanjing Agricultural University, Nanjing 210095, China
| | - Wenyuan Lin
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (East China), Engineering Research Center of Germplasm Enhancement and Utilization of Horticultural Crops, Nanjing Agricultural University, Nanjing 210095, China
| | - Ying Li
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (East China), Engineering Research Center of Germplasm Enhancement and Utilization of Horticultural Crops, Nanjing Agricultural University, Nanjing 210095, China
- Nanjing Suman Plasma Engineering Research Institute Co., Ltd., Nanjing 211162, China
| | - Xilin Hou
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (East China), Engineering Research Center of Germplasm Enhancement and Utilization of Horticultural Crops, Nanjing Agricultural University, Nanjing 210095, China
- Nanjing Suman Plasma Engineering Research Institute Co., Ltd., Nanjing 211162, China
| |
Collapse
|
10
|
Zou T, Wang X, Sun T, Rong H, Wu L, Deng J, Guo T, Wang H, Wang J, Huang M. MYB Transcription Factor OsC1PLSr Involves the Regulation of Purple Leaf Sheath in Rice. Int J Mol Sci 2023; 24:ijms24076655. [PMID: 37047628 PMCID: PMC10095077 DOI: 10.3390/ijms24076655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2023] [Revised: 03/31/2023] [Accepted: 03/31/2023] [Indexed: 04/05/2023] Open
Abstract
Although several regulators associated with purple traits in rice have been identified, the genetic basis of the purple sheath remains unclear. In the present study, F2-1 and F2-2 populations were constructed using purple sheath (H93S) and green sheath (R1173 and YHSM), respectively. In order to identify QTL loci in purple sheaths, BSA analyses were performed on the two F2 populations. A crucial QTL for purple sheath was identified, tentatively named qPLSr6, and was located in the 4.61 Mb to 6.03 Mb region of chromosome 6. Combined with expression pattern analysis of candidate genes, LOC_Os06g10350 (OsC1PLSr) was suggested as a candidate gene. The homozygous mutant KO-1 and KO-2 created through CRISPR/Cas9 editing, lost their purple leaf sheath. The RT-PCR revealed that OsC1PLSr, anthocyanin synthase (ANS), diflavonol-4-reductase (DFR), flavanone-3-hydroxylase (F3H), and flavanone-3′-hydroxylase (F3′H) expression levels were dramatically down-regulated in the mutants. The yeast report system indicated that the 145–272 aa region at the C-terminal of OsC1PLSr is a positive transcriptional activation domain. The results indicated that OsC1PLSr synthesized anthocyanins by regulating the expression of ANS, DFR, F3H, and F3′H. This study provides new insights into the genetic basis of the purple sheath.
Collapse
Affiliation(s)
- Ting Zou
- Guangdong Provincial Key Laboratory of Plant Molecular Breeding, South China Agricultural University, Guangzhou 510642, China
| | - Xinyi Wang
- Guangdong Provincial Key Laboratory of Plant Molecular Breeding, South China Agricultural University, Guangzhou 510642, China
| | - Tong Sun
- Guangdong Provincial Key Laboratory of Plant Molecular Breeding, South China Agricultural University, Guangzhou 510642, China
| | - Huazhen Rong
- Guangdong Provincial Key Laboratory of Plant Molecular Breeding, South China Agricultural University, Guangzhou 510642, China
| | - Linxuan Wu
- Guangdong Provincial Key Laboratory of Plant Molecular Breeding, South China Agricultural University, Guangzhou 510642, China
| | - Jing Deng
- Guangdong Provincial Key Laboratory of Plant Molecular Breeding, South China Agricultural University, Guangzhou 510642, China
| | - Tao Guo
- Guangdong Provincial Key Laboratory of Plant Molecular Breeding, South China Agricultural University, Guangzhou 510642, China
| | - Hui Wang
- Guangdong Provincial Key Laboratory of Plant Molecular Breeding, South China Agricultural University, Guangzhou 510642, China
| | - Jiafeng Wang
- Guangdong Provincial Key Laboratory of Plant Molecular Breeding, South China Agricultural University, Guangzhou 510642, China
| | - Ming Huang
- Guangdong Provincial Key Laboratory of Plant Molecular Breeding, South China Agricultural University, Guangzhou 510642, China
| |
Collapse
|
11
|
Menconi J, Perata P, Gonzali S. Novel R2R3 MYB transcription factors regulate anthocyanin synthesis in Aubergine tomato plants. BMC PLANT BIOLOGY 2023; 23:148. [PMID: 36935480 PMCID: PMC10026432 DOI: 10.1186/s12870-023-04153-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Accepted: 03/01/2023] [Indexed: 06/18/2023]
Abstract
BACKGROUND A high content in anthocyanins, for their health beneficial properties, represents an added value for fruits and vegetables. Tomato (Solanum lycopersicum) is one of the most consumed vegetables worldwide and is rich in vitamins and carotenoids. In recent years, purple-skinned tomatoes, enriched of anthocyanins, were produced recovering allelic variants from wild Solanum species. The molecular basis of the Anthocyanin fruit (Aft) locus, exploited by breeders to activate the anthocyanin synthesis in tomato epicarp, has been recently identified in the correct splicing of the R2R3 MYB gene AN2like. Aubergine (Abg) is a tomato accession which introgressed from Solanum lycopersicoides a locus activating the synthesis of anthocyanins in the fruit. The Abg locus was mapped in the region of chromosome 10 containing Aft and the possibility that Abg and Aft represented alleles of the same gene was hypothesized. RESULTS We dissected the R2R3 MYB gene cluster located in the Abg genomic introgression and demonstrated that AN2like is correctly spliced in Abg plants and is expressed in the fruit epicarp. Moreover, its silencing specifically inhibits the anthocyanin synthesis. The Abg allele of AN2like undergoes alternative splicing and produces two proteins with different activities. Furthermore, in Abg the master regulator of the anthocyanin synthesis in tomato vegetative tissues, AN2, is very poorly expressed. Finally, a novel R2R3 MYB gene was identified: it encodes another positive regulator of the pathway, whose activity was lost in tomato and in its closest relatives. CONCLUSION In this study, we propose that AN2like is responsible of the anthocyanin production in Abg fruits. Unlike wild type tomato, the Abg allele of AN2like is active and able to regulate its targets. Furthermore, in Abg alternative splicing leads to two forms of AN2like with different activities, likely representing a novel type of regulation of anthocyanin synthesis in tomato.
Collapse
Affiliation(s)
- Jacopo Menconi
- PlantLab, Center of Plant Sciences, Scuola Superiore Sant'Anna, Piazza Martiri della Libertà 33, Pisa, 56127, Italy
| | - Pierdomenico Perata
- PlantLab, Center of Plant Sciences, Scuola Superiore Sant'Anna, Piazza Martiri della Libertà 33, Pisa, 56127, Italy
| | - Silvia Gonzali
- PlantLab, Center of Plant Sciences, Scuola Superiore Sant'Anna, Piazza Martiri della Libertà 33, Pisa, 56127, Italy.
| |
Collapse
|
12
|
Fiol A, García S, Dujak C, Pacheco I, Infante R, Aranzana MJ. An LTR retrotransposon in the promoter of a PsMYB10.2 gene associated with the regulation of fruit flesh color in Japanese plum. HORTICULTURE RESEARCH 2022; 9:uhac206. [PMID: 36467274 PMCID: PMC9715577 DOI: 10.1093/hr/uhac206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Accepted: 09/08/2022] [Indexed: 06/17/2023]
Abstract
Japanese plums exhibit wide diversity of fruit coloration. The red to black hues are caused by the accumulation of anthocyanins, while their absence results in yellow, orange or green fruits. In Prunus, MYB10 genes are determinants for anthocyanin accumulation. In peach, QTLs for red plant organ traits map in an LG3 region with three MYB10 copies (PpMYB10.1, PpMYB10.2 and PpMYB10.3). In Japanese plum the gene copy number in this region differs with respect to peach: there are at least three copies of PsMYB10.1, with the expression of one of them (PsMYB10.1a) correlating with fruit skin color. The objective of this study was to determine a possible role of LG3-PsMYB10 genes in the natural variability of the flesh color trait and to develop a molecular marker for marker-assisted selection (MAS). We explored the variability within the LG3-PsMYB10 region using long-range sequences obtained in previous studies through CRISPR-Cas9 enrichment sequencing. We found that the PsMYB10.2 gene was only expressed in red flesh fruits. Its role in promoting anthocyanin biosynthesis was validated by transient overexpression in Japanese plum fruits. The analysis of long-range sequences identified an LTR retrotransposon in the promoter of the expressed PsMYB10.2 gene that explained the trait in 93.1% of the 145 individuals analyzed. We hypothesize that the LTR retrotransposon may promote the PsMYB10.2 expression and activate the anthocyanin biosynthesis pathway. We propose for the first time the PsMYB10.2 gene as candidate for the flesh color natural variation in Japanese plum and provide a molecular marker for MAS.
Collapse
Affiliation(s)
- Arnau Fiol
- Centre for Research in Agricultural Genomics (CRAG) CSIC-IRTA-UAB-UB, Campus UAB, Bellaterra, 08193 Barcelona, Spain
| | - Sergio García
- Centre for Research in Agricultural Genomics (CRAG) CSIC-IRTA-UAB-UB, Campus UAB, Bellaterra, 08193 Barcelona, Spain
| | - Christian Dujak
- Centre for Research in Agricultural Genomics (CRAG) CSIC-IRTA-UAB-UB, Campus UAB, Bellaterra, 08193 Barcelona, Spain
| | - Igor Pacheco
- Instituto de Nutrición y Tecnología de Alimentos (INTA), Universidad de Chile, El Líbano 5524, Santiago, Chile
| | - Rodrigo Infante
- Departamento de Producción Agrícola, Facultad de Ciencias Agronómicas, Universidad de Chile, Santa Rosa 11315, Santiago, Chile
| | | |
Collapse
|
13
|
Ma S, Yang Z, Wu F, Ma J, Fan J, Dong X, Hu R, Feng G, Li D, Wang X, Nie G, Zhang X. R2R3-MYB gene family: Genome-wide identification provides insight to improve the content of proanthocyanidins in Trifolium repens. Gene 2022; 829:146523. [PMID: 35452706 DOI: 10.1016/j.gene.2022.146523] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2022] [Revised: 04/12/2022] [Accepted: 04/15/2022] [Indexed: 11/17/2022]
Abstract
The R2R3-MYB family is one of largest transcription factor families in plants playing significant roles in regulating anthocyanin and proanthocyanidin biosynthesis. Proanthocyanidins are one of major objectives to improve the quality of white clover (Trifolium repens L.), which have a beneficial effect on ruminant to prevent the lethal pasture bloat. A total of 133 TrR2R3-MYB genes were identified and distributed on all 16 chromosomes based on the whole genome information of white clover. Also, by exploring the gene structure, motifs and duplication events of TrR2R3-MYBs, as well as the evolutionary relationship with TrR2R3-MYB genes of other species, 10 TrR2R3-MYB genes with the potential to regulate the anthocyanins and proanthocyanidins biosynthesis were screened. These TrR2R3-MYB genes responded significantly to low temperature in white clover. In addition, they have different expression patterns in leaves, petioles and inflorescences of white clover. Importantly, TrMYB116 and TrMYB118 may positively regulate anthocyanin accumulation and low temperature response in white clover. TrMYB118 may also be associated with anthocyanin pigmentation pattern in Purple leaves. This study provides a basis for verifying the function of TrR2R3-MYB and breeding white clover cultivars with high proanthocyanidins.
Collapse
Affiliation(s)
- Sainan Ma
- College of Grassland Science and Technology, Sichuan Agricultural University, Chengdu, Sichuan 611130, China
| | - Zhongfu Yang
- College of Grassland Science and Technology, Sichuan Agricultural University, Chengdu, Sichuan 611130, China
| | - Feifei Wu
- College of Grassland Science and Technology, Sichuan Agricultural University, Chengdu, Sichuan 611130, China
| | - Jieyu Ma
- College of Grassland Science and Technology, Sichuan Agricultural University, Chengdu, Sichuan 611130, China
| | - Jinwan Fan
- College of Grassland Science and Technology, Sichuan Agricultural University, Chengdu, Sichuan 611130, China
| | - Xintan Dong
- College of Grassland Science and Technology, Sichuan Agricultural University, Chengdu, Sichuan 611130, China
| | - Ruchang Hu
- College of Grassland Science and Technology, Sichuan Agricultural University, Chengdu, Sichuan 611130, China
| | - Guangyan Feng
- College of Grassland Science and Technology, Sichuan Agricultural University, Chengdu, Sichuan 611130, China
| | - Dandan Li
- College of Grassland Science and Technology, Sichuan Agricultural University, Chengdu, Sichuan 611130, China
| | - Xia Wang
- College of Grassland Science and Technology, Sichuan Agricultural University, Chengdu, Sichuan 611130, China
| | - Gang Nie
- College of Grassland Science and Technology, Sichuan Agricultural University, Chengdu, Sichuan 611130, China.
| | - Xinquan Zhang
- College of Grassland Science and Technology, Sichuan Agricultural University, Chengdu, Sichuan 611130, China.
| |
Collapse
|
14
|
Zhang L, Yan L, Zhang C, Kong X, Zheng Y, Dong L. Glucose Supply Induces PsMYB2-Mediated Anthocyanin Accumulation in Paeonia suffruticosa 'Tai Yang' Cut Flower. FRONTIERS IN PLANT SCIENCE 2022; 13:874526. [PMID: 35774824 PMCID: PMC9237572 DOI: 10.3389/fpls.2022.874526] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/12/2022] [Accepted: 05/16/2022] [Indexed: 06/15/2023]
Abstract
Tree peony (Paeonia suffruticosa) is a well-known Chinese ornamental plant with showy flower color. However, the color fading problem during vase time seriously blocks its development in the cut flower market. In this study, we found that exogenous glucose supply improved the color quality of P. suffruticosa 'Tai Yang' cut flowers with increased total soluble sugar and anthocyanin contents of petals. Besides, the promotion effect of glucose was better than the osmotic control of 3-O-methylglucose (3OMG) treatment and the glucose analog mannose treatment. The structural genes, including PsF3H, PsF3'H, PsDFR, PsAOMT, and PsUF5GT, were remarkably upregulated under glucose treatment. Meanwhile, the regulatory genes, including PsbHLH1, PsbHLH3, PsMYB2, PsWD40-1, and PsWD40-2, also showed a strong response to glucose treatment. Among these five regulatory genes, PsMYB2 showed less response to 3OMG treatment but was highly expressed under glucose and mannose treatments, indicating that PsMYB2 may have an important role in the glucose signal pathway. Ectopic overexpression of PsMYB2 in Nicotiana tabacum resulted in a strong pigmentation in petals and stamens of tobacco flowers accompanied with multiple anthocyanin biosynthetic genes upregulated. More importantly, the overexpression of PsMYB2 enhanced the ability of glucose-induced anthocyanin accumulation in Arabidopsis thaliana seedlings since PsMYB2-overexpressing Arabidopsis showed higher expression levels of AtPAL1, AtCHS, AtF3H, AtF3'H, AtDFR, and AtLDOX than those of wild type under glucose treatment. In summary, we suggested that glucose supply promoted petal coloration of P. suffruticosa 'Tai Yang' cut flower through the signal pathway, and PsMYB2 was a key component in this process. Our research made a further understanding of the mechanism that glucose-induced anthocyanin biosynthesis of P. suffruticosa cut flowers during postharvest development, laying a foundation for color retention technology development of cut flowers.
Collapse
Affiliation(s)
- Lili Zhang
- Beijing Key Laboratory of Ornamental Plants Germplasm Innovation and Molecular Breeding, National Engineering Research Center for Floriculture and College of Landscape Architecture, Beijing Forestry University, Beijing, China
| | - Li Yan
- Beijing Key Laboratory of Ornamental Plants Germplasm Innovation and Molecular Breeding, National Engineering Research Center for Floriculture and College of Landscape Architecture, Beijing Forestry University, Beijing, China
- Ningxia State Farm, Yinchuan, China
| | - Chao Zhang
- Zhejiang Provincial Key Laboratory of Germplasm Innovation and Utilization for Garden Plants, School of Landscape Architecture, Zhejiang Agriculture and Forestry University, Hangzhou, China
| | - Xin Kong
- Beijing Key Laboratory of Ornamental Plants Germplasm Innovation and Molecular Breeding, National Engineering Research Center for Floriculture and College of Landscape Architecture, Beijing Forestry University, Beijing, China
| | - Yiqing Zheng
- Beijing Key Laboratory of Ornamental Plants Germplasm Innovation and Molecular Breeding, National Engineering Research Center for Floriculture and College of Landscape Architecture, Beijing Forestry University, Beijing, China
| | - Li Dong
- Beijing Key Laboratory of Ornamental Plants Germplasm Innovation and Molecular Breeding, National Engineering Research Center for Floriculture and College of Landscape Architecture, Beijing Forestry University, Beijing, China
| |
Collapse
|
15
|
Li C, Zhao Y, Qi Y, Duan C, Zhang H, Zhang Q. Eutrema EsMYB90 Gene Improves Growth and Antioxidant Capacity of Transgenic Wheat Under Salinity Stress. FRONTIERS IN PLANT SCIENCE 2022; 13:856163. [PMID: 35574106 PMCID: PMC9102796 DOI: 10.3389/fpls.2022.856163] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2022] [Accepted: 03/28/2022] [Indexed: 05/27/2023]
Abstract
The ectopic expression of the EsMYB90 transcription factor gene from halophytic Eutrema salsugineum has been reported to enhance the level of anthocyanin and other flavonoid metabolites in transgenic tobacco. In this study, the wheat JW1 overexpressing EsMYB90 showed longer roots and higher fresh weight than that in wild type (WT) under salt stress. In addition, the transgenic wheat plants displayed significantly higher peroxidase (POD) and glutathione S-transferase (GST) activity, as well as markedly lower malondialdehyde (MDA) content than that of the WT during salt stress conditions. The analysis of histochemical staining and H2O2 level indicated that the accumulation of reactive oxygen species (ROS) was significantly lower in the roots of transgenic wheat plants compared to the WT under salt stress. Transcriptome analysis revealed that the EsMYB90 gene affected the expression of considerable amounts of stress-related genes that were involved in phenylpropanoid biosynthesis and antioxidant activity in transgenic plants subjected to NaCl treatment. Importantly, the significantly upregulated expression genes in transgenic wheat under salt stress were mainly associated with the antioxidative enzymes POD and GST encoding genes compared with the WT. Furthermore, EsMYB90 is suggested to bind with the MYB-binding elements of pTaANS2 and pTaDFR1 by dual luciferase assay, to activate the transcription of TaANS2 and TaDFR1 genes that are encoding key enzymes of anthocyanin biosynthesis in transgenic wheat plants. All the results indicated that, under salt stress, the EsMYB90 gene plays a crucial role in preventing wheat seedlings from oxidative stress damage via enhancing the accumulation of non-enzymatic flavonoids and activities of antioxidative enzymes, which suggested that EsMYB90 is an ideal candidate gene for the genetic engineering of crops.
Collapse
|
16
|
Zhuang Y, Manzitto-Tripp EA. Co-expression network analyses of anthocyanin biosynthesis genes in Ruellia (Wild Petunias; Acanthaceae). BMC Ecol Evol 2022; 22:27. [PMID: 35260074 PMCID: PMC8905905 DOI: 10.1186/s12862-021-01955-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Accepted: 12/22/2021] [Indexed: 11/26/2022] Open
Abstract
Background Anthocyanins are major pigments contributing to flower coloration and as such knowledge of molecular architecture underlying the anthocyanin biosynthetic pathway (ABP) is key to understanding flower color diversification. To identify ABP structural genes and associated regulatory networks, we sequenced 16 transcriptomes generated from 10 species of Ruellia and then conducted co-expression analyses among resulting data. Results Complete coding sequences for 12 candidate structural loci representing eight genes plus nine candidate regulatory loci were assembled. Analysis of non-synonymous/synonymous (dn/ds) mutation rates indicated all identified loci are under purifying selection, suggesting overall selection to prevent the accumulation of deleterious mutations. Additionally, upstream enzymes have lower rates of molecular evolution compared to downstream enzymes. However, site-specific tests of selection yielded evidence for positive selection at several sites, including four in F3'H2 and five in DFR3, and these sites are located in protein binding regions. A species-level phylogenetic tree constructed using a newly implemented hybrid transcriptome–RADseq approach implicates several flower color transitions among the 10 species. We found evidence of both regulatory and structural mutations to F3′5'H in helping to explain the evolution of red flowers from purple-flowered ancestors. Conclusions Sequence comparisons and co-expression analyses of ABP loci revealed that mutations in regulatory loci are likely to play a greater role in flower color transitions in Ruellia compared to mutations in underlying structural genes. Supplementary Information The online version contains supplementary material available at 10.1186/s12862-021-01955-x.
Collapse
Affiliation(s)
- Yongbin Zhuang
- Department of Ecology and Evolutionary Biology, University of Colorado, UCB 334, Boulder, CO, 80309, USA.,Museum of Natural History, University of Colorado, UCB 350, Boulder, CO, 80309, USA.,College of Agronomy, Shandong Agricultural University, Taian, 271018, Shandong, China
| | - Erin A Manzitto-Tripp
- Department of Ecology and Evolutionary Biology, University of Colorado, UCB 334, Boulder, CO, 80309, USA. .,Museum of Natural History, University of Colorado, UCB 350, Boulder, CO, 80309, USA.
| |
Collapse
|
17
|
Dhakarey R, Yaritz U, Tian L, Amir R. A Myb transcription factor, PgMyb308-like, enhances the level of shikimate, aromatic amino acids, and lignins, but represses the synthesis of flavonoids and hydrolyzable tannins, in pomegranate (Punica granatum L.). HORTICULTURE RESEARCH 2022; 9:uhac008. [PMID: 35147167 PMCID: PMC9113223 DOI: 10.1093/hr/uhac008] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/04/2021] [Accepted: 12/04/2021] [Indexed: 06/14/2023]
Abstract
Pomegranate fruit peels are highly abundant in metabolites derived from the shikimate pathway, such as hydrolyzable tannins (HTs) and flavonoids. These metabolites are beneficial to human health (commercial juice is enriched with peel metabolites), and also protect the fruit from environmental stresses. To understand the transcriptional control of shikimate pathway-related metabolites in pomegranate, we cloned and characterized a subgroup S4 R2R3 Myb transcription factor, PgMyb308-like. Overexpressing PgMyb308-like in pomegranate hairy roots increased the accumulation of shikimate, aromatic amino acids, isoferulic acid, and total lignins, but led to reduced gallic acid and its downstream products HTs, as well as multiple flavonoids. Changes in these metabolites are supported by the increased expression of 3-deoxy-D-arabino-heptulosonate 7-phosphate synthase and shikimate dehydrogenase 1 (PgSDH1) (the SDH isoform associated with shikimate biosynthesis), and the reduced expression of PgSDH4 (the SDH isoform suggested to produce gallic acid). Transcriptome analysis of PgMyb308-like-overexpressing hairy roots further revealed reprogramming of cell wall-related genes, while overexpression of PgMyb308-like in Arabidopsis thaliana plants uncovered its distinct role in a different genetic and metabolic background. These results together suggest that PgMyb308-like activates genes in the shikimate pathway and lignin biosynthesis, but suppresses those involved in the production of HTs and flavonoids.
Collapse
Affiliation(s)
- Rohit Dhakarey
- Department of Plant Science, Migal – Galilee Technology Center, P.O. Box 831, Kiryat Shmona 1101600, Israel
| | - Uri Yaritz
- Department of Plant Science, Migal – Galilee Technology Center, P.O. Box 831, Kiryat Shmona 1101600, Israel
- Department of Biotechnology, Tel-Hai College, Upper Galilee 1220800, Israel
| | - Li Tian
- Department of Plant Sciences, University of California, Davis, CA 95616, USA
| | - Rachel Amir
- Department of Plant Science, Migal – Galilee Technology Center, P.O. Box 831, Kiryat Shmona 1101600, Israel
- Department of Biotechnology, Tel-Hai College, Upper Galilee 1220800, Israel
| |
Collapse
|
18
|
Khademi M, Nazarian-Firouzabadi F, Ismaili A. Expression of apple MdMYB10 transcription factor in sugar beet with a screenable marker role and antimicrobial activity. 3 Biotech 2022; 12:52. [PMID: 35127307 PMCID: PMC8801000 DOI: 10.1007/s13205-022-03120-7] [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: 01/29/2021] [Accepted: 01/14/2022] [Indexed: 02/03/2023] Open
Abstract
Selection of transgenic plants by using genes encoding screenable markers of plant origin with health benefit properties, such as anthocyanin is an important aim in plant genetic engineering. In this study, Malus domestica MYB10 (MdMYB10) gene, was used for Agrobacterium tumefaciens-mediated transformation of two SBS-02 and SBS-04 sugar beet lines. The impact of different light regimes on plant tissue culture from a combination of light, dark/light and dark was investigated. The results of this study showed that the MdMYB10 gene was successfully integrated into the selected purple transgenic lines, suggesting that the expression of MdMYB10 gene in sugar beet shoots can be used as a screenable markers for transformation, possibly replacing antibiotic resistant genes. Furthermore, the results of the antibacterial activity of transgenic plants extracts showed that the total extract obtained from transgenic lines significantly (P < 0.01) inhibited the growth and development of Enterococcus faecium and Enterococcus faecalis bacteria compared to the non-transgenic plants. The results of this study showed that the combination of betalain with vancomycin demonstrated a synergistic antimicrobial effect, also, suggesting that the expression of MdMYB10 may play a dual role by accumulating betalain and exhibiting a screenable markers function. SUPPLEMENTARY INFORMATION The online version contains supplementary material available at 10.1007/s13205-022-03120-7.
Collapse
Affiliation(s)
- Mitra Khademi
- Production Engineering and Plant Genetics Department, Faculty of Agriculture, Lorestan University, P.O. Box: 465, Khorramabad, Iran
| | - Farhad Nazarian-Firouzabadi
- Production Engineering and Plant Genetics Department, Faculty of Agriculture, Lorestan University, P.O. Box: 465, Khorramabad, Iran
| | - Ahmad Ismaili
- Production Engineering and Plant Genetics Department, Faculty of Agriculture, Lorestan University, P.O. Box: 465, Khorramabad, Iran
| |
Collapse
|
19
|
Zhang YL, Lin-Wang K, Albert NW, Elborough C, Espley RV, Andre CM, Fang ZZ. Identification of a Strong Anthocyanin Activator, VbMYBA, From Berries of Vaccinium bracteatum Thunb. FRONTIERS IN PLANT SCIENCE 2021; 12:697212. [PMID: 34938303 PMCID: PMC8685453 DOI: 10.3389/fpls.2021.697212] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2021] [Accepted: 11/09/2021] [Indexed: 05/27/2023]
Abstract
Wufanshu (Vaccinium bracteatum Thunb.), which is a wild member of the genus Vaccinium, accumulates high concentration of anthocyanin in its berries. In this study, the accumulated anthocyanins and their derivatives in Wufanshu berries were identified through UHPLC-MS/MS analysis. Candidate anthocyanin biosynthetic genes were identified from the transcriptome of Wufanshu berries. qRT-PCR analyses showed that the expression of anthocyanin structural genes correlated with anthocyanin accumulation in berries. The R2R3-MYB, VbMYBA, which is a homolog of anthocyanin promoting R2R3-MYBs from other Vaccinium species, was also identified. Transient expression of VbMYBA in Nicotiana tabacum leaves confirmed its role as an anthocyanin regulator, and produced a higher anthocyanin concentration when compared with blueberry VcMYBA expression. Dual-luciferase assays further showed that VbMYBA can activate the DFR and UFGT promoters from other Vaccinium species. VbMYBA has an additional 23 aa at the N terminus compared with blueberry VcMYBA, but this was shown not to affect the ability to regulate anthocyanins. Taken together, our results provide important information on the molecular mechanisms responsible for the high anthocyanin content in Wufanshu berries.
Collapse
Affiliation(s)
- Ya-Ling Zhang
- Fruit Research Institute, Fujian Academy of Agricultural Sciences, Fuzhou, China
| | - Kui Lin-Wang
- The New Zealand Institute for Plant and Food Research Limited, Mt Albert Research Centre, Auckland, New Zealand
| | - Nick W. Albert
- The New Zealand Institute for Plant and Food Research Limited, Mt Albert Research Centre, Auckland, New Zealand
| | - Caitlin Elborough
- The New Zealand Institute for Plant and Food Research Limited, Mt Albert Research Centre, Auckland, New Zealand
| | - Richard V. Espley
- The New Zealand Institute for Plant and Food Research Limited, Mt Albert Research Centre, Auckland, New Zealand
| | - Christelle M. Andre
- The New Zealand Institute for Plant and Food Research Limited, Mt Albert Research Centre, Auckland, New Zealand
| | - Zhi-Zhen Fang
- Fruit Research Institute, Fujian Academy of Agricultural Sciences, Fuzhou, China
| |
Collapse
|
20
|
Karppinen K, Lafferty DJ, Albert NW, Mikkola N, McGhie T, Allan AC, Afzal BM, Häggman H, Espley RV, Jaakola L. MYBA and MYBPA transcription factors co-regulate anthocyanin biosynthesis in blue-coloured berries. THE NEW PHYTOLOGIST 2021; 232:1350-1367. [PMID: 34351627 DOI: 10.1111/nph.17669] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2021] [Accepted: 08/02/2021] [Indexed: 05/14/2023]
Abstract
The regulatory network of R2R3 MYB transcription factors in anthocyanin biosynthesis is not fully understood in blue-coloured berries containing delphinidin compounds. We used blue berries of bilberry (Vaccinium myrtillus) to comprehensively characterise flavonoid-regulating R2R3 MYBs, which revealed a new type of co-regulation in anthocyanin biosynthesis between members of MYBA-, MYBPA1- and MYBPA2-subgroups. VmMYBA1, VmMYBPA1.1 and VmMYBPA2.2 expression was elevated at berry ripening and by abscisic acid treatment. Additionally, VmMYBA1 and VmMYBPA1.1 expression was strongly downregulated in a white berry mutant. Complementation and transient overexpression assays confirmed VmMYBA1 and VmMYBA2 to induce anthocyanin accumulation. Promoter activation assays showed that VmMYBA1, VmMYBPA1.1 and VmMYBPA2.2 had similar activity towards dihydroflavonol 4-reductase (DFR) and anthocyanidin synthase (ANS), but differential regulation activity for UDP-glucose flavonoid 3-O-glucosyltransferase (UFGT) and flavonoid 3'5'-hydroxylase (F3'5'H) promoters. Silencing of VmMYBPA1.1 in berries led to the downregulation of key anthocyanin and delphinidin biosynthesis genes. Functional analyses of other MYBPA regulators, and a member of novel MYBPA3 subgroup, associated them with proanthocyanidin biosynthesis and F3'5'H expression. The existence of 18 flavonoid-regulating MYBs indicated gene duplication, which may have enabled functional diversification among MYBA, MYBPA1 and MYBPA2 subgroups. Our results provide new insights into the intricate regulation of the complex anthocyanin profile found in blue-coloured berries involving regulation of both cyanidin and delphinidin branches.
Collapse
Affiliation(s)
- Katja Karppinen
- Department of Arctic and Marine Biology, UiT The Arctic University of Norway, Tromsø, 9037, Norway
| | - Declan J Lafferty
- The New Zealand Institute for Plant and Food Research Ltd, Palmerston North, 4410, New Zealand
- School of Biological Sciences, University of Auckland, Auckland, 1142, New Zealand
| | - Nick W Albert
- The New Zealand Institute for Plant and Food Research Ltd, Palmerston North, 4410, New Zealand
| | - Nelli Mikkola
- Department of Ecology and Genetics, University of Oulu, Oulu, 90014, Finland
| | - Tony McGhie
- The New Zealand Institute for Plant and Food Research Ltd, Palmerston North, 4410, New Zealand
| | - Andrew C Allan
- School of Biological Sciences, University of Auckland, Auckland, 1142, New Zealand
- The New Zealand Institute for Plant and Food Research Ltd, Auckland, 1025, New Zealand
| | - Bilal M Afzal
- Department of Arctic and Marine Biology, UiT The Arctic University of Norway, Tromsø, 9037, Norway
| | - Hely Häggman
- Department of Ecology and Genetics, University of Oulu, Oulu, 90014, Finland
| | - Richard V Espley
- The New Zealand Institute for Plant and Food Research Ltd, Auckland, 1025, New Zealand
| | - Laura Jaakola
- Department of Arctic and Marine Biology, UiT The Arctic University of Norway, Tromsø, 9037, Norway
- Norwegian Institute of Bioeconomy Research (NIBIO), Ås, 1431, Norway
| |
Collapse
|
21
|
Sakuta M, Tanaka A, Iwase K, Miyasaka M, Ichiki S, Hatai M, Inoue YT, Yamagami A, Nakano T, Yoshida K, Shimada S. Anthocyanin synthesis potential in betalain-producing Caryophyllales plants. JOURNAL OF PLANT RESEARCH 2021; 134:1335-1349. [PMID: 34477986 PMCID: PMC8930957 DOI: 10.1007/s10265-021-01341-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Accepted: 08/19/2021] [Indexed: 05/15/2023]
Abstract
Although anthocyanins are widely distributed in higher plants, betalains have replaced anthocyanins in most species of the order Caryophyllales. The accumulation of flavonols in Caryophyllales plants implies that the late step of anthocyanin biosynthesis from dihydroflavonols to anthocyanins may be blocked in Caryophyllales. The isolation and characterization of functional dihydroflavonol 4-reductase (DFR) and anthocyanidin synthase (ANS) from Caryophyllales plants has indicated a lack of anthocyanins due to suppression of DFR and ANS. In this study, we demonstrated that overexpression of DFR and ANS from Spinacia oleracea (SoDFR and SoANS, respectively) with PhAN9, which encodes glutathione S-transferase (required for anthocyanin sequestration) from Petunia induces ectopic anthocyanin accumulation in yellow tepals of the cactus Astrophytum myriostigma. A promoter assay of SoANS showed that the Arabidopsis MYB transcription factor PRODUCTION OF ANTHOCYANIN PIGMENT1 (PAP1) activated the SoANS promoter in Arabidopsis leaves. The overexpression of Arabidopsis transcription factors with PhAN9 also induced ectopic anthocyanin accumulation in yellow cactus tepals. PAP homologs from betalain-producing Caryophyllales did not activate the promoter of ANS. In-depth characterization of Caryophyllales PAPs and site-directed mutagenesis in the R2R3-MYB domains identified the amino acid residues affecting transactivation of Caryophyllales PAPs. The substitution of amino acid residues recovered the transactivation ability of Caryophyllales PAPs. Therefore, loss of function in MYB transcription factors may suppress expression of genes involved in the late stage of anthocyanin synthesis, resulting in a lack of anthocyanin in betalain-producing Caryophyllales plants.
Collapse
Affiliation(s)
- Masaaki Sakuta
- Department of Biological Sciences, Ochanomizu University, 112-8610, Tokyo, Japan.
- Organization for the Strategic Coordination of Research and Intellectual Properties, Meiji University, 214-8571, Kanagawa, Japan.
| | - Asuka Tanaka
- Department of Biological Sciences, Ochanomizu University, 112-8610, Tokyo, Japan
| | - Kaori Iwase
- Department of Biological Sciences, Ochanomizu University, 112-8610, Tokyo, Japan
| | - Mizuki Miyasaka
- Department of Biological Sciences, Ochanomizu University, 112-8610, Tokyo, Japan
| | - Sachiko Ichiki
- Department of Biological Sciences, Ochanomizu University, 112-8610, Tokyo, Japan
| | - Miho Hatai
- Department of Biological Sciences, Ochanomizu University, 112-8610, Tokyo, Japan
| | - Yoriko T Inoue
- Department of Biological Sciences, Ochanomizu University, 112-8610, Tokyo, Japan
| | - Ayumi Yamagami
- Graduate School of Biostudies, Kyoto University, 606-8502, Kyoto, Japan
| | - Takeshi Nakano
- Graduate School of Biostudies, Kyoto University, 606-8502, Kyoto, Japan
| | - Kazuko Yoshida
- Department of Biological Sciences, Ochanomizu University, 112-8610, Tokyo, Japan
| | - Setsuko Shimada
- Department of Biological Sciences, Ochanomizu University, 112-8610, Tokyo, Japan
- Synthetic Genomics Research group, RIKEN Center for Sustainable Resource Science, 230-0045, Yokohama, Kanagawa, Japan
| |
Collapse
|
22
|
Ma Y, Ma X, Gao X, Wu W, Zhou B. Light Induced Regulation Pathway of Anthocyanin Biosynthesis in Plants. Int J Mol Sci 2021; 22:ijms222011116. [PMID: 34681776 PMCID: PMC8538450 DOI: 10.3390/ijms222011116] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Revised: 10/09/2021] [Accepted: 10/10/2021] [Indexed: 01/05/2023] Open
Abstract
Anthocyanins are natural pigments with antioxidant effects that exist in various fruits and vegetables. The accumulation of anthocyanins is induced by environmental signals and regulated by transcription factors in plants. Numerous evidence has indicated that among the environmental factors, light is one of the most signal regulatory factors involved in the anthocyanin biosynthesis pathway. However, the signal transduction of light and molecular regulation of anthocyanin synthesis remains to be explored. Here, we focus on the research progress of signal transduction factors for positive and negative regulation in light-dependent and light-independent anthocyanin biosynthesis. In particular, we will discuss light-induced regulatory pathways and related specific regulators of anthocyanin biosynthesis in plants. In addition, an integrated regulatory network of anthocyanin biosynthesis controlled by transcription factors is discussed based on the significant progress.
Collapse
Affiliation(s)
- Yanyun Ma
- Key Laboratory of Saline-Alkali Vegetation Ecology Restoration, Northeast Forestry University, Ministry of Education, Harbin 150040, China; (Y.M.); (X.M.)
- College of Life Science, Northeast Forestry University, Harbin 150040, China
| | - Xu Ma
- Key Laboratory of Saline-Alkali Vegetation Ecology Restoration, Northeast Forestry University, Ministry of Education, Harbin 150040, China; (Y.M.); (X.M.)
- College of Life Science, Northeast Forestry University, Harbin 150040, China
| | - Xiang Gao
- Key Laboratory of Molecular Epigenetics of MOE and Institute of Genetics & Cytology, Northeast Normal University, Changchun 130024, China;
| | - Weilin Wu
- Agricultural College, Yanbian University, Yanji 133002, China
- Correspondence: (W.W.); (B.Z.); Tel.: +86-183-4338-8262 (W.W.); +86-0451-8219-1738 (B.Z.)
| | - Bo Zhou
- Key Laboratory of Saline-Alkali Vegetation Ecology Restoration, Northeast Forestry University, Ministry of Education, Harbin 150040, China; (Y.M.); (X.M.)
- College of Life Science, Northeast Forestry University, Harbin 150040, China
- Correspondence: (W.W.); (B.Z.); Tel.: +86-183-4338-8262 (W.W.); +86-0451-8219-1738 (B.Z.)
| |
Collapse
|
23
|
Han Z, Shang X, Shao L, Wang Y, Zhu X, Fang W, Ma Y. Meta-analysis of the effect of expression of MYB transcription factor genes on abiotic stress. PeerJ 2021; 9:e11268. [PMID: 34164229 PMCID: PMC8194419 DOI: 10.7717/peerj.11268] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Accepted: 03/23/2021] [Indexed: 01/06/2023] Open
Abstract
Background MYB proteins are a large group of transcription factors. The overexpression of MYB genes has been reported to improve abiotic stress tolerance in plant. However, due to the variety of plant species studied and the types of gene donors/recipients, along with different experimental conditions, it is difficult to interpret the roles of MYB in abiotic stress tolerance from published data. Methods Using meta-analysis approach, we investigated the plant characteristics involved in cold, drought, and salt stress in MYB-overexpressing plants and analyzed the degrees of influence on plant performance by experimental variables. Results The results show that two of the four measured plant parameters in cold-stressed plants, two of the six in drought-stressed, and four of the 13 in salt-stressed were significantly impacted by MYB overexpression by 22% or more, and the treatment medium, donor/recipient species, and donor type significantly influence the effects of MYB-overexpression on drought stress tolerance. Also, the donor/recipient species, donor type, and stress duration all significantly affected the extent of MYB-mediated salt stress tolerance. In summary, this study compiles and analyzes the data across studies to help us understand the complex interactions that dictate the efficacy of heterologous MYB expression designed for improved abiotic stress tolerance in plants.
Collapse
Affiliation(s)
- Zhaolan Han
- College of Horticulture, Nanjing Agricultural University, Nanjing, Jiangsu, China
| | - Xiaowen Shang
- College of Horticulture, Nanjing Agricultural University, Nanjing, Jiangsu, China
| | - Lingxia Shao
- College of Horticulture, Nanjing Agricultural University, Nanjing, Jiangsu, China
| | - Ya Wang
- College of Horticulture, Nanjing Agricultural University, Nanjing, Jiangsu, China
| | - Xujun Zhu
- College of Horticulture, Nanjing Agricultural University, Nanjing, Jiangsu, China
| | - Wanping Fang
- College of Horticulture, Nanjing Agricultural University, Nanjing, Jiangsu, China
| | - Yuanchun Ma
- College of Horticulture, Nanjing Agricultural University, Nanjing, Jiangsu, China
| |
Collapse
|
24
|
Chen W, Zheng Q, Li J, Liu Y, Xu L, Zhang Q, Luo Z. DkMYB14 is a bifunctional transcription factor that regulates the accumulation of proanthocyanidin in persimmon fruit. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2021; 106:1708-1727. [PMID: 33835602 DOI: 10.1111/tpj.15266] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Revised: 03/18/2021] [Accepted: 04/03/2021] [Indexed: 06/12/2023]
Abstract
Proanthocyanidins (PAs) are phenolic secondary metabolites that contribute to the protection of plant and human health. Persimmon (Diospyros kaki Thunb.) can accumulate abundant PAs in fruit, which cause a strong sensation of astringency. Proanthocyanidins can be classified into soluble and insoluble PAs; the former cause astringency but the latter do not. Soluble PAs can be converted into insoluble PAs upon interacting with acetaldehydes. We demonstrate here that DkMYB14, which regulates the accumulation of PA in persimmon fruit flesh, is a bifunctional transcription factor that acts as a repressor in PA biosynthesis but becomes an activator when involved in acetaldehyde biosynthesis. Interestingly, both functions contribute to the elimination of astringency by decreasing PA biosynthesis and promoting its insolubilization. We show that the amino acid Gly39 in the R2 domain and the ethylene response factor-associated amphiphilic repression-like motif in the C-terminal of DkMYB14 are essential for the regulation of both PA and acetaldehyde synthesis. The repressive function of DkMYB14 was lost after the mutation of either motif, and all activities of DkMYB14 were eliminated following the mutation of both motifs. Our results demonstrate that DkMYB14 functions as both a transcriptional activator and a repressor, directly repressing biosynthesis of PA and promoting its insolubilization, resulting in non-astringency in persimmon.
Collapse
Affiliation(s)
- Wenxing Chen
- Key Laboratory of Horticultural Plant Biology, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
| | - Qingyou Zheng
- Key Laboratory of Horticultural Plant Biology, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
| | - Jinwang Li
- Key Laboratory of Horticultural Plant Biology, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
| | - Ying Liu
- Key Laboratory of Horticultural Plant Biology, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
| | - Liqing Xu
- Key Laboratory of Horticultural Plant Biology, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
| | - Qinglin Zhang
- Key Laboratory of Horticultural Plant Biology, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
| | - Zhengrong Luo
- Key Laboratory of Horticultural Plant Biology, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
| |
Collapse
|
25
|
Yang J, Song HD, Chen Y, Chen B, Kim M, Kim P, Kawabata S, Li Y, Wang Y. A single amino acid substitution in the R2R3 conserved domain of the BrPAP1a transcription factor impairs anthocyanin production in turnip (Brassica rapa subsp. rapa). PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2021; 162:124-136. [PMID: 33676299 DOI: 10.1016/j.plaphy.2021.02.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Accepted: 02/10/2021] [Indexed: 05/27/2023]
Abstract
The purple pigmentation in the epidermis of swollen roots of 'Tsuda' turnip (Brassica rapa subsp. rapa) is induced by light, providing a good system to investigate the genetic mechanism of light-dependent anthocyanin biosynthesis in B. rapa. Here, we identified the R2R3 MYB transcription factor gene PRODUCTION OF ANTHOCYANIN PIGMENT1 (BrPAP1a) as the critical gene in the anthocyanin-defective mutant w68. A nucleotide mutation in the turn region of the R3 domain was screened, which caused an amino acid substitution from glycine to serine (G94S). Functional analysis showed that the interaction of BrPAP1a with two bHLH factors ENHANCER OF GLABRA 3 (BrEGL3) and TRANSPARENT TESTA 8 (BrTT8) were impaired by the mutation. Expression of BrTT8 was activated by BrPAP1a and enhanced by MYB-bHLH-WDR (MBW) complexes, but blocked by the mutation. Furthermore, BrPAP1a directly bound the MYB-recognizing element (MRE) in the BrTT8 promoter, while the G94S substitution caused a loss of DNA-binding activity. Our findings indicate that G94 is required for protein interaction with BrTT8 and BrEGL3 and DNA-binding of BrPAP1a to activate BrTT8 expression, which leads to anthocyanin biosynthesis. Collectively, our data indicate the importance of the highly conserved amino acids within R2R3 MYB proteins in regulating anthocyanin biosynthesis and could aid programs to increase anthocyanins in turnip roots.
Collapse
Affiliation(s)
- Jianfei Yang
- Key Laboratory of Saline-alkali Vegetation Ecology Restoration (Northeast Forestry University), Ministry of Education, Harbin, 150040, China; College of Life Science, Northeast Forestry University, Harbin, 150040, China.
| | - Hyon Dok Song
- Key Laboratory of Saline-alkali Vegetation Ecology Restoration (Northeast Forestry University), Ministry of Education, Harbin, 150040, China; College of Life Science, Northeast Forestry University, Harbin, 150040, China.
| | - Yunzhu Chen
- Key Laboratory of Saline-alkali Vegetation Ecology Restoration (Northeast Forestry University), Ministry of Education, Harbin, 150040, China; College of Life Science, Northeast Forestry University, Harbin, 150040, China.
| | - Bowei Chen
- Key Laboratory of Saline-alkali Vegetation Ecology Restoration (Northeast Forestry University), Ministry of Education, Harbin, 150040, China; College of Life Science, Northeast Forestry University, Harbin, 150040, China.
| | - Minjun Kim
- Key Laboratory of Saline-alkali Vegetation Ecology Restoration (Northeast Forestry University), Ministry of Education, Harbin, 150040, China; College of Life Science, Northeast Forestry University, Harbin, 150040, China.
| | - Pyol Kim
- Key Laboratory of Saline-alkali Vegetation Ecology Restoration (Northeast Forestry University), Ministry of Education, Harbin, 150040, China; College of Life Science, Northeast Forestry University, Harbin, 150040, China.
| | - Saneyuki Kawabata
- Institute for Sustainable Agroecosystem Services, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Midoricho, Nishitokyo, Tokyo, 188-0002, Japan.
| | - Yuhua Li
- Key Laboratory of Saline-alkali Vegetation Ecology Restoration (Northeast Forestry University), Ministry of Education, Harbin, 150040, China; College of Life Science, Northeast Forestry University, Harbin, 150040, China.
| | - Yu Wang
- Key Laboratory of Saline-alkali Vegetation Ecology Restoration (Northeast Forestry University), Ministry of Education, Harbin, 150040, China; College of Life Science, Northeast Forestry University, Harbin, 150040, China.
| |
Collapse
|
26
|
Zhu Y, Bao Y. Genome-Wide Mining of MYB Transcription Factors in the Anthocyanin Biosynthesis Pathway of Gossypium Hirsutum. Biochem Genet 2021; 59:678-696. [PMID: 33502632 DOI: 10.1007/s10528-021-10027-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Accepted: 01/06/2021] [Indexed: 10/22/2022]
Abstract
The MYB family, one of the largest transcription factor (TF) families, plays an important role in plant growth, development, and stress response. Although genome-wide analysis of the MYB family has been performed in many species based on sequence similarity, predicting the potential functions of the MYB genes and classifying the regulators into specific metabolic pathways remains difficult. In this study, using a hidden Markov model search and co-expression regulatory network analysis, we demonstrated a process to screen and identify potential MYB TFs in the anthocyanin biosynthesis pathway of Gossypium hirsutum. As a result, we identified 617 and 784 MYB genes (812 in total) from the previously reported and recently released genomes, respectively. Using 126 structural genes involved in the anthocyanin biosynthesis pathway as targets for several co-expression network analyses, we sorted out 31 R2R3-MYB genes, which are potential regulators in the specific pathway. Phylogenetic and collinearity analyses indicated that 83.9% of the 31 MYB genes originated from whole genome duplication or polyploidization. In addition, we revealed relatively specific regulatory relationships between the MYB TFs and their target structural genes. Approximately, 71% of the MYBs could regulate only a single anthocyanin-related structural gene. Moreover, we found that the A- and D- subgenome homoeologs of MYB TFs in G. hirsutum rarely co-regulate the same target gene. The current study not only demonstrated an easy method to rapidly predict potential TFs in a specific metabolic pathway, but also enhanced our understanding of the evolution, gene characteristics, expression, and regulatory pattern of MYB TFs in G. hirsutum.
Collapse
Affiliation(s)
- Yingjie Zhu
- School of Life Sciences, Qufu Normal University, Qufu, 273165, Shandong, China
| | - Ying Bao
- School of Life Sciences, Qufu Normal University, Qufu, 273165, Shandong, China.
| |
Collapse
|
27
|
Zhao L, Song Z, Wang B, Gao Y, Shi J, Sui X, Chen X, Zhang Y, Li Y. R2R3-MYB Transcription Factor NtMYB330 Regulates Proanthocyanidin Biosynthesis and Seed Germination in Tobacco ( Nicotiana tabacum L.). FRONTIERS IN PLANT SCIENCE 2021; 12:819247. [PMID: 35111187 PMCID: PMC8801704 DOI: 10.3389/fpls.2021.819247] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2021] [Accepted: 12/27/2021] [Indexed: 05/14/2023]
Abstract
Proanthocyanidins (PAs) are important phenolic compounds and PA biosynthesis is regulated by a ternary MBW complex consisting of a R2R3-MYB regulator, a bHLH factor and a WDR protein. In this study, a tobacco R2R3-MYB factor NtMYB330 was characterized as the PA-specific regulator in which the PA biosynthesis was promoted in the flowers of NtMYB330-overexpressing lines while decreased in the flowers of ntmyb330 mutants. NtMYB330 can interact with flavonoid-related bHLH partner NtAn1b and WDR protein NtAn11-1, and the NtMYB330-NtAn1b complex is required to achieve strong transcriptional activation of the PA-related structural genes NtDFR1, NtANS1, NtLAR1 and NtANR1. Our data reveal that NtMYB330 regulates PA biosynthesis in seeds and affects seed germination, in which NtMYB330-overexpressing lines showed higher PA accumulations in seed coats and inhibited germination, while ntmyb330 mutants had reduced seed coat PAs and improved germination. NtMYB330 affects seed germination possibly through two mechanisms: modulating seed coat PAs to affect coat-imposed dormancy. In addition, NtMYB330 regulates the expressions of abscisic acid (ABA) and gibberellin acid (GA) signaling-related genes, affecting ABA-GA crosstalk and seed germination. This study reveals that NtMYB330 specifically regulates PA biosynthesis via formation of the MBW complex in tobacco flowers and affects germination through adjustment of PA concentrations and ABA/GA signaling in tobacco seeds.
Collapse
Affiliation(s)
- Lu Zhao
- Key Laboratory of Tobacco Biotechnological Breeding, Yunnan Academy of Tobacco Agricultural Sciences, Kunming, China
- National Tobacco Genetic Engineering Research Center, Yunnan Academy of Tobacco Agricultural Sciences, Kunming, China
- *Correspondence: Lu Zhao,
| | - Zhongbang Song
- Key Laboratory of Tobacco Biotechnological Breeding, Yunnan Academy of Tobacco Agricultural Sciences, Kunming, China
- National Tobacco Genetic Engineering Research Center, Yunnan Academy of Tobacco Agricultural Sciences, Kunming, China
| | - Bingwu Wang
- Key Laboratory of Tobacco Biotechnological Breeding, Yunnan Academy of Tobacco Agricultural Sciences, Kunming, China
- National Tobacco Genetic Engineering Research Center, Yunnan Academy of Tobacco Agricultural Sciences, Kunming, China
| | - Yulong Gao
- Key Laboratory of Tobacco Biotechnological Breeding, Yunnan Academy of Tobacco Agricultural Sciences, Kunming, China
- National Tobacco Genetic Engineering Research Center, Yunnan Academy of Tobacco Agricultural Sciences, Kunming, China
| | - Junli Shi
- Key Laboratory of Tobacco Biotechnological Breeding, Yunnan Academy of Tobacco Agricultural Sciences, Kunming, China
- National Tobacco Genetic Engineering Research Center, Yunnan Academy of Tobacco Agricultural Sciences, Kunming, China
| | - Xueyi Sui
- Key Laboratory of Tobacco Biotechnological Breeding, Yunnan Academy of Tobacco Agricultural Sciences, Kunming, China
- National Tobacco Genetic Engineering Research Center, Yunnan Academy of Tobacco Agricultural Sciences, Kunming, China
| | - Xuejun Chen
- Key Laboratory of Tobacco Biotechnological Breeding, Yunnan Academy of Tobacco Agricultural Sciences, Kunming, China
- National Tobacco Genetic Engineering Research Center, Yunnan Academy of Tobacco Agricultural Sciences, Kunming, China
| | - Yihan Zhang
- Key Laboratory of Tobacco Biotechnological Breeding, Yunnan Academy of Tobacco Agricultural Sciences, Kunming, China
- National Tobacco Genetic Engineering Research Center, Yunnan Academy of Tobacco Agricultural Sciences, Kunming, China
| | - Yongping Li
- Key Laboratory of Tobacco Biotechnological Breeding, Yunnan Academy of Tobacco Agricultural Sciences, Kunming, China
- National Tobacco Genetic Engineering Research Center, Yunnan Academy of Tobacco Agricultural Sciences, Kunming, China
- Yongping Li,
| |
Collapse
|
28
|
Leng F, Cao J, Ge Z, Wang Y, Zhao C, Wang S, Li X, Zhang Y, Sun C. Transcriptomic Analysis of Root Restriction Effects on Phenolic Metabolites during Grape Berry Development and Ripening. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:9090-9099. [PMID: 32806110 DOI: 10.1021/acs.jafc.0c02488] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
In the present study, the effects of root restriction (RR) on the main phenolic metabolites and the related gene expression at different developmental stages were studied at the transcriptomic and metabolomic levels in "Summer Black" grape berries (Vitis vinifera × Vitis labrusca). The results were as follows: seven phenolic acid compounds, three stilbene compounds, nine flavonol compounds, 10 anthocyanin compounds, and 24 proanthocyanidin compounds were identified by ultra-performance liquid chromatography-high-resolution mass spectrometry. RR treatment significantly promoted the biosynthesis of phenolic acid, trans-resveratrol, flavonol, and anthocyanin and also affected the proanthocyanidin content, which was elevated in the early developmental stages and then reduced in the late developmental stages. The functional genes for phenylalanine ammonia-lyase, trans-cinnamate 4-monooxygenase, 4-coumarate-CoA ligase, shikimate O-hydroxycinnamoyl transferase, chalcone synthase, chalcone isomerase, stilbene synthase, flavonoid 3',5'-hydroxylase, anthocyanidin 3-O-glucosyltransferase, and the transcription factors MYBA1, MYBA2, MYBA3, and MYBA22 were inferred to play critical roles in the changes regulated by RR treatment.
Collapse
Affiliation(s)
- Feng Leng
- Laboratory of Fruit Quality Biology/The State Agriculture Ministry Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Zhejiang University, Zijingang Campus, Hangzhou 310058, P. R. China
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, P. R. China
| | - Jinping Cao
- Laboratory of Fruit Quality Biology/The State Agriculture Ministry Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Zhejiang University, Zijingang Campus, Hangzhou 310058, P. R. China
| | - Zhiwei Ge
- Analysis Center of Agrobiology and Environmental Sciences, Zhejiang University, Hangzhou 310058, P. R. China
| | - Yue Wang
- Laboratory of Fruit Quality Biology/The State Agriculture Ministry Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Zhejiang University, Zijingang Campus, Hangzhou 310058, P. R. China
| | - Chenning Zhao
- Laboratory of Fruit Quality Biology/The State Agriculture Ministry Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Zhejiang University, Zijingang Campus, Hangzhou 310058, P. R. China
| | - Shiping Wang
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Xian Li
- Laboratory of Fruit Quality Biology/The State Agriculture Ministry Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Zhejiang University, Zijingang Campus, Hangzhou 310058, P. R. China
| | - Yanli Zhang
- Yangzhou Ruiyang Ecological Horticulture Co., Ltd, Yangzhou 225009, P. R. China
| | - Chongde Sun
- Laboratory of Fruit Quality Biology/The State Agriculture Ministry Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Zhejiang University, Zijingang Campus, Hangzhou 310058, P. R. China
| |
Collapse
|
29
|
Qi Y, Gu C, Wang X, Gao S, Li C, Zhao C, Li C, Ma C, Zhang Q. Identification of the Eutrema salsugineum EsMYB90 gene important for anthocyanin biosynthesis. BMC PLANT BIOLOGY 2020; 20:186. [PMID: 32345216 PMCID: PMC7189703 DOI: 10.1186/s12870-020-02391-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2019] [Accepted: 04/12/2020] [Indexed: 06/01/2023]
Abstract
BACKGROUND Anthocyanins contribute to coloration and antioxidation effects in different plant tissues. MYB transcription factors have been demonstrated to be a key regulator for anthocyanin synthesis in many plants. However, little information was available about the MYB genes in the halophyte species Eutrema salsugineum. RESULT Here we report the identification of an important anthocyanin biosynthesis regulator EsMYB90 from Eutrema salsugineum, which is a halophyte tolerant to multiple abiotic stresses. Our phylogenetic and localization analyses supported that EsMYB90 is an R2R3 type of MYB transcription factor. Ectopic expression of EsMYB90 in tobacco and Arabidopsis enhanced pigmentation and anthocyanin accumulation in various organs. The transcriptome analysis revealed that 42 genes upregulated by EsMYB90 in 35S:EsMYB90 tobacco transgenic plants are required for anthocyanin biosynthesis. Moreover, our qRT-PCR results showed that EsMYB90 promoted expression of early (PAL, CHS, and CHI) and late (DFR, ANS, and UFGT) anthocyanin biosynthesis genes in stems, leaves, and flowers of 35S:EsMYB90 tobacco transgenic plants. CONCLUSIONS Our results indicated that EsMYB90 is a MYB transcription factor, which regulates anthocyanin biosynthesis genes to control anthocyanin biosynthesis. Our work provides a new tool to enhance anthocyanin production in various plants.
Collapse
Affiliation(s)
- Yuting Qi
- Shandong Provincial Key Laboratory of Plant Stress Research, College of Life Science, Shandong Normal University, Jinan, 250014, China
| | - Caihong Gu
- Shandong Provincial Key Laboratory of Plant Stress Research, College of Life Science, Shandong Normal University, Jinan, 250014, China
| | - Xingjun Wang
- Shandong Provincial Key Laboratory of Plant Stress Research, College of Life Science, Shandong Normal University, Jinan, 250014, China
- Biotechnology Research Center, Shandong Academy of Agricultural Sciences, Shandong Provincial Key Laboratory of Crop Genetic Improvement, Ecology and Physiology, Jinan, 250100, China
| | - Shiqing Gao
- Beijing Engineering Research Center for Hybrid Wheat, The Municipal Key Laboratory of the Molecular Genetics of Hybrid Wheat, Beijing Academy of Agriculture and Forestry Sciences, Beijing, 100097, China
| | - Changsheng Li
- Biotechnology Research Center, Shandong Academy of Agricultural Sciences, Shandong Provincial Key Laboratory of Crop Genetic Improvement, Ecology and Physiology, Jinan, 250100, China
| | - Chuanzhi Zhao
- Shandong Provincial Key Laboratory of Plant Stress Research, College of Life Science, Shandong Normal University, Jinan, 250014, China
- Biotechnology Research Center, Shandong Academy of Agricultural Sciences, Shandong Provincial Key Laboratory of Crop Genetic Improvement, Ecology and Physiology, Jinan, 250100, China
| | - Chuanshun Li
- Shandong Provincial Key Laboratory of Plant Stress Research, College of Life Science, Shandong Normal University, Jinan, 250014, China
| | - Changle Ma
- Shandong Provincial Key Laboratory of Plant Stress Research, College of Life Science, Shandong Normal University, Jinan, 250014, China
| | - Quan Zhang
- Shandong Provincial Key Laboratory of Plant Stress Research, College of Life Science, Shandong Normal University, Jinan, 250014, China.
| |
Collapse
|
30
|
Qi Y, Gu C, Wang X, Gao S, Li C, Zhao C, Li C, Ma C, Zhang Q. Identification of the Eutrema salsugineum EsMYB90 gene important for anthocyanin biosynthesis. BMC PLANT BIOLOGY 2020; 20:186. [PMID: 32345216 DOI: 10.21203/rs.2.18301/v3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2019] [Accepted: 04/12/2020] [Indexed: 05/27/2023]
Abstract
BACKGROUND Anthocyanins contribute to coloration and antioxidation effects in different plant tissues. MYB transcription factors have been demonstrated to be a key regulator for anthocyanin synthesis in many plants. However, little information was available about the MYB genes in the halophyte species Eutrema salsugineum. RESULT Here we report the identification of an important anthocyanin biosynthesis regulator EsMYB90 from Eutrema salsugineum, which is a halophyte tolerant to multiple abiotic stresses. Our phylogenetic and localization analyses supported that EsMYB90 is an R2R3 type of MYB transcription factor. Ectopic expression of EsMYB90 in tobacco and Arabidopsis enhanced pigmentation and anthocyanin accumulation in various organs. The transcriptome analysis revealed that 42 genes upregulated by EsMYB90 in 35S:EsMYB90 tobacco transgenic plants are required for anthocyanin biosynthesis. Moreover, our qRT-PCR results showed that EsMYB90 promoted expression of early (PAL, CHS, and CHI) and late (DFR, ANS, and UFGT) anthocyanin biosynthesis genes in stems, leaves, and flowers of 35S:EsMYB90 tobacco transgenic plants. CONCLUSIONS Our results indicated that EsMYB90 is a MYB transcription factor, which regulates anthocyanin biosynthesis genes to control anthocyanin biosynthesis. Our work provides a new tool to enhance anthocyanin production in various plants.
Collapse
Affiliation(s)
- Yuting Qi
- Shandong Provincial Key Laboratory of Plant Stress Research, College of Life Science, Shandong Normal University, Jinan, 250014, China
| | - Caihong Gu
- Shandong Provincial Key Laboratory of Plant Stress Research, College of Life Science, Shandong Normal University, Jinan, 250014, China
| | - Xingjun Wang
- Shandong Provincial Key Laboratory of Plant Stress Research, College of Life Science, Shandong Normal University, Jinan, 250014, China
- Biotechnology Research Center, Shandong Academy of Agricultural Sciences, Shandong Provincial Key Laboratory of Crop Genetic Improvement, Ecology and Physiology, Jinan, 250100, China
| | - Shiqing Gao
- Beijing Engineering Research Center for Hybrid Wheat, The Municipal Key Laboratory of the Molecular Genetics of Hybrid Wheat, Beijing Academy of Agriculture and Forestry Sciences, Beijing, 100097, China
| | - Changsheng Li
- Biotechnology Research Center, Shandong Academy of Agricultural Sciences, Shandong Provincial Key Laboratory of Crop Genetic Improvement, Ecology and Physiology, Jinan, 250100, China
| | - Chuanzhi Zhao
- Shandong Provincial Key Laboratory of Plant Stress Research, College of Life Science, Shandong Normal University, Jinan, 250014, China
- Biotechnology Research Center, Shandong Academy of Agricultural Sciences, Shandong Provincial Key Laboratory of Crop Genetic Improvement, Ecology and Physiology, Jinan, 250100, China
| | - Chuanshun Li
- Shandong Provincial Key Laboratory of Plant Stress Research, College of Life Science, Shandong Normal University, Jinan, 250014, China
| | - Changle Ma
- Shandong Provincial Key Laboratory of Plant Stress Research, College of Life Science, Shandong Normal University, Jinan, 250014, China
| | - Quan Zhang
- Shandong Provincial Key Laboratory of Plant Stress Research, College of Life Science, Shandong Normal University, Jinan, 250014, China.
| |
Collapse
|
31
|
Cao Y, Li K, Li Y, Zhao X, Wang L. MYB Transcription Factors as Regulators of Secondary Metabolism in Plants. BIOLOGY 2020; 9:biology9030061. [PMID: 32213912 PMCID: PMC7150910 DOI: 10.3390/biology9030061] [Citation(s) in RCA: 94] [Impact Index Per Article: 23.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Revised: 03/12/2020] [Accepted: 03/19/2020] [Indexed: 11/25/2022]
Abstract
MYB transcription factors (TFs), as one of the largest gene families in plants, play important roles in multiple biological processes, such as plant growth and development, cell morphology and pattern building, physiological activity metabolism, primary and secondary metabolic reactions, and responses to environmental stresses. The function of MYB TFs in crops has been widely studied, but few studies have been done on medicinal plants. In this review, we summarized the MYB TFs that play important roles in secondary metabolism and emphasized the possible mechanisms underlying how MYB TFs are regulated at the protein, posttranscriptional, and transcriptional levels, as well as how they regulate the downstream target gene networks related to secondary metabolism in plants, especially in medicinal plants.
Collapse
Affiliation(s)
- Yunpeng Cao
- Key Laboratory of Cultivation and Protection for Non-Wood Forest Trees, Ministry of Education, Central South University of Forestry and Technology, Changsha 410004, China; (Y.C.); (Y.L.)
- Key Lab of Non-wood Forest Products of State Forestry Administration, College of Forestry, Central South University of Forestry and Technology, Changsha 410004, China
| | - Kui Li
- Science and Technology Promotion Center, Huaihua Forestry Research Institute, Huaihua 418000, China;
| | - Yanli Li
- Key Laboratory of Cultivation and Protection for Non-Wood Forest Trees, Ministry of Education, Central South University of Forestry and Technology, Changsha 410004, China; (Y.C.); (Y.L.)
- Key Lab of Non-wood Forest Products of State Forestry Administration, College of Forestry, Central South University of Forestry and Technology, Changsha 410004, China
| | - Xiaopei Zhao
- College of Life Sciences, Anhui Agricultural University, Hefei 230036, China;
| | - Lihu Wang
- College of Landscape and Ecological Engineering, Hebei University of Engineering, Handan 056038, China
- Correspondence:
| |
Collapse
|
32
|
Colanero S, Tagliani A, Perata P, Gonzali S. Alternative Splicing in the Anthocyanin Fruit Gene Encoding an R2R3 MYB Transcription Factor Affects Anthocyanin Biosynthesis in Tomato Fruits. PLANT COMMUNICATIONS 2020; 1:100006. [PMID: 33404542 PMCID: PMC7747991 DOI: 10.1016/j.xplc.2019.100006] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Revised: 09/16/2019] [Accepted: 10/23/2019] [Indexed: 05/04/2023]
Abstract
Tomato (Solanum lycopersicum) fruits are typically red at ripening, with high levels of carotenoids and a low content in flavonoids. Considerable work has been done to enrich the spectrum of their health-beneficial phytochemicals, and interspecific crosses with wild species have successfully led to purple anthocyanin-colored fruits. The Aft (Anthocyanin fruit) tomato accession inherited from Solanum chilense the ability to accumulate anthocyanins in fruit peel through the introgression of loci controlling anthocyanin pigmentation, including four R2R3 MYB transcription factor-encoding genes. Here, we carried out a comparative functional analysis of these transcription factors in wild-type and Aft plants, and tested their ability to take part in the transcriptional complexes that regulate the biosynthetic pathway and their efficiency in inducing anthocyanin pigmentation. Significant differences emerged for SlAN2like, both in the expression level and protein functionality, with splicing mutations determining a complete loss of function of the wild-type protein. This transcription factor thus appears to play a key role in the anthocyanin fruit pigmentation. Our data provide new clues to the long-awaited genetic basis of the Aft phenotype and contribute to understand why domesticated tomato fruits display a homogeneous red coloration without the typical purple streaks observed in wild tomato species.
Collapse
|
33
|
Rahim MA, Resentini F, Dalla Vecchia F, Trainotti L. Effects on Plant Growth and Reproduction of a Peach R2R3-MYB Transcription Factor Overexpressed in Tobacco. FRONTIERS IN PLANT SCIENCE 2019; 10:1143. [PMID: 31681342 PMCID: PMC6813659 DOI: 10.3389/fpls.2019.01143] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Accepted: 08/21/2019] [Indexed: 05/27/2023]
Abstract
In plants, anthocyanin production is controlled by MYB and bHLH transcription factors. In peach, among the members of these families, MYB10.1 and bHLH3 have been shown to be the most important genes for production of these pigments during fruit ripening. Anthocyanins are valuable molecules, and the overexpression of regulatory genes in annual fast-growing plants has been explored for their biotechnological production. The overexpression of peach MYB10.1 in tobacco plants induced anthocyanin pigmentation, which was particularly strong in the reproductive parts. Pigment production was the result of an up-regulation of the expression level of key genes of the flavonoid biosynthetic pathway, such as NtCHS, NtCHI, NtF3H, NtDFR, NtANS, and NtUFGT, as well as of the proanthocyanidin biosynthetic pathway such as NtLAR. Nevertheless, phenotypic alterations in transgenic tobacco lines were not only limited to anthocyanin production. Lines showing a strong phenotype (type I) exhibited irregular leaf shape and size and reduced plant height. Moreover, flowers had reduced length of anther's filament, nondehiscent anthers, reduced pistil length, aborted nectary glands, and impaired capsule development, but the reproductive parts including androecium, gynoecium, and petals were more pigmented that in wild type. Surprisingly, overexpression of peach MYB10.1 led to suppression of NtMYB305, which is required for floral development and, of one of its target genes, NECTARIN1 (NtNCE1), involved in the nectary gland formation. MYB10.1 overexpression up-regulated JA biosynthetic (NtAOS) and signaling (NtJAZd) genes, as well as 1-aminocyclopropane-1-carboxylate oxidase (NtACO) in flowers. The alteration of these hormonal pathways might be among the causes of the observed floral abnormalities with defects in both male and female gametophyte development. In particular, approximately only 30% of pollen grains of type I lines were viable, while during megaspore formation, there was a block during FG1 (St3-II). This block seemed to be associated to an excessive accumulation of callose. It can be concluded that the overexpression of peach MYB10.1 in tobacco not only regulates flavonoid biosynthesis (anthocyanin and proanthocyanidin) in the reproductive parts but also plays a role in other processes such as vegetative and reproductive development.
Collapse
Affiliation(s)
- Md Abdur Rahim
- Department of Biology, University of Padova, Padova, Italy
| | | | - Francesca Dalla Vecchia
- Department of Biology, University of Padova, Padova, Italy
- Orto Botanico, University of Padova, Padova, Italy
| | - Livio Trainotti
- Department of Biology, University of Padova, Padova, Italy
- Orto Botanico, University of Padova, Padova, Italy
| |
Collapse
|
34
|
Wang L, Lu W, Ran L, Dou L, Yao S, Hu J, Fan D, Li C, Luo K. R2R3-MYB transcription factor MYB6 promotes anthocyanin and proanthocyanidin biosynthesis but inhibits secondary cell wall formation in Populus tomentosa. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2019; 99:733-751. [PMID: 31021017 DOI: 10.1111/tpj.14364] [Citation(s) in RCA: 115] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2018] [Accepted: 04/08/2019] [Indexed: 05/18/2023]
Abstract
The secondary cell wall is an important carbon sink in higher plants and its biosynthesis requires coordination of metabolic fluxes in the phenylpropanoid pathway. In Arabidopsis (Arabidopsis thaliana), MYB75 and the KNOX transcription factor KNAT7 form functional complexes to regulate secondary cell wall formation in the inflorescence stem. However, the molecular mechanism by which these transcription factors control different branches of the phenylpropanoid pathway remains poorly understood in woody species. We isolated an R2R3-MYB transcription factor MYB6 from Populus tomentosa and determined that it was expressed predominately in young leaves. Overexpression of MYB6 in transgenic poplar upregulated flavonoid biosynthetic gene expression, resulting in significantly increased accumulation of anthocyanin and proanthocyanidins. MYB6-overexpression plants showed reduced secondary cell wall deposition, accompanied by repressed expression of secondary cell wall biosynthetic genes. We further showed that MYB6 interacted physically with KNAT7 and formed functional complexes that acted to repress secondary cell wall development in poplar and Arabidopsis. The results provide an insight into the transcriptional mechanisms involved in the regulation of the metabolic fluxes between the flavonoid and lignin biosynthetic pathways in poplar.
Collapse
Affiliation(s)
- Lijun Wang
- Chongqing Key Laboratory of Plant Resource Conservation and Germplasm Innovation, School of Life Sciences, Southwest University, Chongqing, 400715, China
| | - Wanxiang Lu
- Chongqing Key Laboratory of Plant Resource Conservation and Germplasm Innovation, School of Life Sciences, Southwest University, Chongqing, 400715, China
| | - Lingyu Ran
- Chongqing Key Laboratory of Plant Resource Conservation and Germplasm Innovation, School of Life Sciences, Southwest University, Chongqing, 400715, China
| | - Liwen Dou
- Chongqing Key Laboratory of Plant Resource Conservation and Germplasm Innovation, School of Life Sciences, Southwest University, Chongqing, 400715, China
| | - Shu Yao
- Chongqing Key Laboratory of Plant Resource Conservation and Germplasm Innovation, School of Life Sciences, Southwest University, Chongqing, 400715, China
| | - Jian Hu
- Chongqing Key Laboratory of Plant Resource Conservation and Germplasm Innovation, School of Life Sciences, Southwest University, Chongqing, 400715, China
| | - Di Fan
- Chongqing Key Laboratory of Plant Resource Conservation and Germplasm Innovation, School of Life Sciences, Southwest University, Chongqing, 400715, China
- Key Laboratory of Eco-environments of Three Gorges Reservoir Region, Ministry of Education, Southwest University, Chongqing, 400715, China
| | - Chaofeng Li
- Key Laboratory of Eco-environments of Three Gorges Reservoir Region, Ministry of Education, Southwest University, Chongqing, 400715, China
| | - Keming Luo
- Chongqing Key Laboratory of Plant Resource Conservation and Germplasm Innovation, School of Life Sciences, Southwest University, Chongqing, 400715, China
- Key Laboratory of Eco-environments of Three Gorges Reservoir Region, Ministry of Education, Southwest University, Chongqing, 400715, China
| |
Collapse
|
35
|
Li Z, Vickrey TL, McNally MG, Sato SJ, Clemente TE, Mower JP. Assessing Anthocyanin Biosynthesis in Solanaceae as a Model Pathway for Secondary Metabolism. Genes (Basel) 2019; 10:genes10080559. [PMID: 31349565 PMCID: PMC6723469 DOI: 10.3390/genes10080559] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Revised: 07/19/2019] [Accepted: 07/23/2019] [Indexed: 01/25/2023] Open
Abstract
Solanaceae have played an important role in elucidating how flower color is specified by the flavonoid biosynthesis pathway (FBP), which produces anthocyanins and other secondary metabolites. With well-established reverse genetics tools and rich genomic resources, Solanaceae provide a robust framework to examine the diversification of this well-studied pathway over short evolutionary timescales and to evaluate the predictability of genetic perturbation on pathway flux. Genomes of eight Solanaceae species, nine related asterids, and four rosids were mined to evaluate variation in copy number of the suite of FBP enzymes involved in anthocyanin biosynthesis. Comparison of annotation sources indicated that the NCBI annotation pipeline generated more and longer FBP annotations on average than genome-specific annotation pipelines. The pattern of diversification of each enzyme among asterids was assessed by phylogenetic analysis, showing that the CHS superfamily encompasses a large paralogous family of ancient and recent duplicates, whereas other FBP enzymes have diversified via recent duplications in particular lineages. Heterologous expression of a pansy F3′5′H gene in tobacco changed flower color from pink to dark purple, demonstrating that anthocyanin production can be predictably modified using reverse genetics. These results suggest that the Solanaceae FBP could be an ideal system to model genotype-to-phenotype interactions for secondary metabolism.
Collapse
Affiliation(s)
- Zuo Li
- Center for Plant Science Innovation, University of Nebraska, Lincoln, NE 68588, USA
- Guangdong Key Laboratory of Ornamental Plant Germplasm Innovation and Utilization, Environmental Horticulture Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
| | - Trisha L Vickrey
- Center for Plant Science Innovation, University of Nebraska, Lincoln, NE 68588, USA
- Department of Chemistry, University of Nebraska, Lincoln, NE 68588, USA
| | - Moira G McNally
- Center for Plant Science Innovation, University of Nebraska, Lincoln, NE 68588, USA
- Biology Department, University of Jamestown, Jamestown, ND 58405, USA
| | - Shirley J Sato
- Center for Plant Science Innovation, University of Nebraska, Lincoln, NE 68588, USA
- Center for Biotechnology, University of Nebraska, Lincoln, NE 68588, USA
| | - Tom Elmo Clemente
- Center for Plant Science Innovation, University of Nebraska, Lincoln, NE 68588, USA
- Department of Agronomy and Horticulture, University of Nebraska, Lincoln, NE 68583, USA
| | - Jeffrey P Mower
- Center for Plant Science Innovation, University of Nebraska, Lincoln, NE 68588, USA.
- Department of Agronomy and Horticulture, University of Nebraska, Lincoln, NE 68583, USA.
| |
Collapse
|
36
|
Gu L, Dou L, Guo Y, Wang H, Li L, Wang C, Ma L, Wei H, Yu S. The WRKY transcription factor GhWRKY27 coordinates the senescence regulatory pathway in upland cotton (Gossypium hirsutum L.). BMC PLANT BIOLOGY 2019; 19:116. [PMID: 30922232 PMCID: PMC6440019 DOI: 10.1186/s12870-019-1688-z] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2018] [Accepted: 02/19/2019] [Indexed: 05/20/2023]
Abstract
BACKGROUND Premature senescence can reduce the yield and quality of crops. WRKY transcription factors (TFs) play important roles during leaf senescence, but little is known about their ageing mechanisms in cotton. RESULTS In this study, a group III WRKY TF, GhWRKY27, was isolated and characterized. The expression of GhWRKY27 was induced by leaf senescence and was higher in an early-ageing cotton variety than in a non-early-ageing cotton variety. Overexpression of GhWRKY27 in Arabidopsis promoted leaf senescence, as determined by reduced chlorophyll content and elevated expression of senescence-associated genes (SAGs). Yeast two-hybrid (Y2H) and bimolecular fluorescence complementation (BiFC) assays showed that GhWRKY27 interacted with an MYB TF, GhTT2. Putative target genes of GhWRKY27 were identified via chromatin immunoprecipitation followed by sequencing (ChIP-seq). Yeast one-hybrid (Y1H) assay and electrophoretic mobility shift assay (EMSA) revealed that GhWRKY27 binds directly to the promoters of cytochrome P450 94C1 (GhCYP94C1) and ripening-related protein 2 (GhRipen2-2). In addition, the expression patterns of GhTT2, GhCYP94C1 and GhRipen2-2 were identified during leaf senescence. Transient dual-luciferase reporter assay indicated that GhWRKY27 could activate the expression of GhCYP94C1 and GhRipen2-2. CONCLUSIONS Our work lays the foundation for further study of the functional roles of WRKY genes during leaf senescence in cotton. In addition, our data provide new insights into the senescence-associated mechanisms of WRKY genes in cotton.
Collapse
Affiliation(s)
- Lijiao Gu
- State Key Laboratory of Cotton Biology, Cotton Research Institute, Chinese Academy of Agricultural Sciences, Anyang, 455000 China
| | - Lingling Dou
- State Key Laboratory of Cotton Biology, Cotton Research Institute, Chinese Academy of Agricultural Sciences, Anyang, 455000 China
| | - Yaning Guo
- State Key Laboratory of Cotton Biology, Cotton Research Institute, Chinese Academy of Agricultural Sciences, Anyang, 455000 China
| | - Hantao Wang
- State Key Laboratory of Cotton Biology, Cotton Research Institute, Chinese Academy of Agricultural Sciences, Anyang, 455000 China
| | - Libei Li
- State Key Laboratory of Cotton Biology, Cotton Research Institute, Chinese Academy of Agricultural Sciences, Anyang, 455000 China
| | - Congcong Wang
- State Key Laboratory of Cotton Biology, Cotton Research Institute, Chinese Academy of Agricultural Sciences, Anyang, 455000 China
| | - Liang Ma
- State Key Laboratory of Cotton Biology, Cotton Research Institute, Chinese Academy of Agricultural Sciences, Anyang, 455000 China
| | - Hengling Wei
- State Key Laboratory of Cotton Biology, Cotton Research Institute, Chinese Academy of Agricultural Sciences, Anyang, 455000 China
| | - Shuxun Yu
- State Key Laboratory of Cotton Biology, Cotton Research Institute, Chinese Academy of Agricultural Sciences, Anyang, 455000 China
| |
Collapse
|
37
|
Zhou H, Lin-Wang K, Wang F, Espley RV, Ren F, Zhao J, Ogutu C, He H, Jiang Q, Allan AC, Han Y. Activator-type R2R3-MYB genes induce a repressor-type R2R3-MYB gene to balance anthocyanin and proanthocyanidin accumulation. THE NEW PHYTOLOGIST 2019; 221:1919-1934. [PMID: 30222199 DOI: 10.1111/nph.15486] [Citation(s) in RCA: 146] [Impact Index Per Article: 29.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2018] [Accepted: 09/12/2018] [Indexed: 05/22/2023]
Abstract
Anthocyanin and proanthocyanidin (PA) accumulation is regulated by both myeloblastosis (MYB) activators and repressors, but little information is available on hierarchical interactions between the positive and negative regulators. Here, we report on a R2R3-MYB repressor in peach, designated PpMYB18, which acts as a negative regulator of anthocyanin and PA accumulation. PpMYB18 can be activated by both anthocyanin- and PA-related MYB activators, and is expressed both at fruit ripening and juvenile stages when anthocyanins or PAs, respectively, are being synthesized. The PpMYB18 protein competes with MYB activators for binding to basic Helix Loop Helixes (bHLHs), which develops a fine-tuning regulatory loop to balance PA and anthocyanin accumulation. In addition, the bHLH binding motif in the R3 domain and the C1 and C2 repression motifs in the C-terminus of PpMYB18 both confer repressive activity of PpMYB18. Our study also demonstrates a modifying negative feedback loop, which prevents cells from excess accumulation of anthocyanin and PAs, and serves as a model for balancing secondary metabolite accumulation at the transcriptional level.
Collapse
Affiliation(s)
- Hui Zhou
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden of the Chinese Academy of Sciences, Wuhan, 430074, China
- Institute of Horticulture, Anhui Academy of Agricultural Sciences, Hefei, 230031, China
| | - Kui Lin-Wang
- The New Zealand Institute for Plant & Food Research Ltd, Mt Albert Research Centre, Private Bag, Auckland, 92169, New Zealand
| | - Furong Wang
- Institute of Fruit Tree and Tea, Hubei Academy of Agricultural Sciences, Wuhan, 430209, China
| | - Richard V Espley
- The New Zealand Institute for Plant & Food Research Ltd, Mt Albert Research Centre, Private Bag, Auckland, 92169, New Zealand
| | - Fei Ren
- Institute of Forestry and Pomology, Beijing Academy of Agriculture and Forestry Sciences, Beijing, 100097, China
| | - Jianbo Zhao
- Institute of Forestry and Pomology, Beijing Academy of Agriculture and Forestry Sciences, Beijing, 100097, China
| | - Collins Ogutu
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden of the Chinese Academy of Sciences, Wuhan, 430074, China
- Sino-African Joint Research Center, Chinese Academy of Sciences, Wuhan, 430074, China
| | - Huaping He
- Institute of Fruit Tree and Tea, Hubei Academy of Agricultural Sciences, Wuhan, 430209, China
| | - Quan Jiang
- Institute of Forestry and Pomology, Beijing Academy of Agriculture and Forestry Sciences, Beijing, 100097, China
| | - Andrew C Allan
- The New Zealand Institute for Plant & Food Research Ltd, Mt Albert Research Centre, Private Bag, Auckland, 92169, New Zealand
- School of Biological Sciences, University of Auckland, Auckland, 1020, New Zealand
| | - Yuepeng Han
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden of the Chinese Academy of Sciences, Wuhan, 430074, China
- Sino-African Joint Research Center, Chinese Academy of Sciences, Wuhan, 430074, China
- College of Horticulture Science and Engineering, Shandong Agricultural University, Tai-An, 271018, China
| |
Collapse
|
38
|
Zhang B, Hülskamp M. Evolutionary Analysis of MBW Function by Phenotypic Rescue in Arabidopsis thaliana. FRONTIERS IN PLANT SCIENCE 2019; 10:375. [PMID: 30984225 PMCID: PMC6449874 DOI: 10.3389/fpls.2019.00375] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Accepted: 03/12/2019] [Indexed: 05/07/2023]
Abstract
The MBW complex consisting of the three proteins R2R3MYB, bHLH and WDR regulates five traits in Arabidopsis thaliana including trichome and root hair patterning, seed coat color, anthocyanidin production and seed coat mucilage release. The WDR gene TTG1 regulates each trait in specific combinations with different bHLH and R2R3MYB proteins. In this study we analyze to what extent the biochemical properties of the MBW proteins contribute to trait specificity by expressing them in appropriate A. thaliana mutants. We show that the rescue behavior of A. thaliana bHLH and R2R3MYB protein is sufficient to explain the function as derived previously from mutant analysis. When extending this rescue approach using MBW proteins from other species we find that proteins involved in anthocyanidin regulation typically show a rescue of the anthocyanidin phenotype but not of the other traits. Finally, we correlate the rescue abilities of MBW protein from different species with the A. thaliana proteins.
Collapse
|
39
|
Ma YJ, Duan HR, Zhang F, Li Y, Yang HS, Tian FP, Zhou XH, Wang CM, Ma R. Transcriptomic analysis of Lycium ruthenicum Murr. during fruit ripening provides insight into structural and regulatory genes in the anthocyanin biosynthetic pathway. PLoS One 2018; 13:e0208627. [PMID: 30532153 PMCID: PMC6285980 DOI: 10.1371/journal.pone.0208627] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Accepted: 11/20/2018] [Indexed: 02/04/2023] Open
Abstract
Fruit development in Lycium ruthenicum Murr. involves a succession of physiological and biochemical changes reflecting the transcriptional modulation of thousands of genes. Although recent studies have investigated the dynamic transcriptomic responses during fruit ripening in L. ruthenicum, most have been limited in scope, and thus systematic data representing the structural genes and transcription factors involved in anthocyanin biosynthesis are lacking. In this study, the transcriptomes of three ripening stages associated with anthocyanin accumulation, including S1 (green ripeness stage), S2 (skin color change) and S3 (complete ripeness stage) in L. ruthenicum were investigated using Illumina sequencing. Of a total of 43,573 assembled unigenes, 12,734 were differentially expressed during fruit ripening in L. ruthenicum. Twenty-five significantly differentially expressed structural genes (including PAL, C4H, 4CL, CHS, CHI, F3H, F3'H, F3'5'H, DFR, ANS and UFGT) were identified that might be associated with anthocyanin biosynthesis. Additionally, several transcription factors, including MYB, bHLH, WD40, NAC, WRKY, bZIP and MADS, were correlated with the structural genes, implying their important interaction with anthocyanin biosynthesis-related genes. Our findings provide insight into anthocyanin biosynthesis and regulation patterns in L. ruthenicum and offer a systematic basis for elucidating the molecular mechanisms governing anthocyanin biosynthesis in L. ruthenicum.
Collapse
Affiliation(s)
- Yan-Jun Ma
- College of Forestry, Gansu Agricultural University, Lanzhou, China
- College of Agronomy, Gansu Agricultural University, Lanzhou, China
| | - Hui-Rong Duan
- Lanzhou Institute of Husbandry and Pharmaceutical Science, Chinese Academy of Agricultural Sciences, Lanzhou, China
| | - Feng Zhang
- College of Agronomy, Gansu Agricultural University, Lanzhou, China
| | - Yi Li
- College of Forestry, Gansu Agricultural University, Lanzhou, China
| | - Hong-Shan Yang
- Lanzhou Institute of Husbandry and Pharmaceutical Science, Chinese Academy of Agricultural Sciences, Lanzhou, China
| | - Fu-Ping Tian
- Lanzhou Institute of Husbandry and Pharmaceutical Science, Chinese Academy of Agricultural Sciences, Lanzhou, China
| | - Xue-Hui Zhou
- Lanzhou Institute of Husbandry and Pharmaceutical Science, Chinese Academy of Agricultural Sciences, Lanzhou, China
| | - Chun-Mei Wang
- Lanzhou Institute of Husbandry and Pharmaceutical Science, Chinese Academy of Agricultural Sciences, Lanzhou, China
| | - Rui Ma
- College of Forestry, Gansu Agricultural University, Lanzhou, China
| |
Collapse
|
40
|
Liu Y, Liu D, Khan AR, Liu B, Wu M, Huang L, Wu J, Song G, Ni H, Ying H, Yu H, Gan Y. NbGIS regulates glandular trichome initiation through GA signaling in tobacco. PLANT MOLECULAR BIOLOGY 2018; 98:153-167. [PMID: 30171399 DOI: 10.1007/s11103-018-0772-3] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Accepted: 08/22/2018] [Indexed: 06/08/2023]
Abstract
KEY MESSAGE A novel gene NbGIS positively regulates glandular trichome initiation through GA Signaling in tobacco. NbMYB123-like regulates glandular trichome initiation by acting downstream of NbGIS in tobacco. Glandular trichome is a specialized multicellular structure which has capability to synthesize and secrete secondary metabolites and protects plants from biotic and abiotic stresses. Our previous results revealed that a C2H2 zinc-finger transcription factor GIS and its sub-family genes act upstream of GL3/EGL3-GL1-TTG1 transcriptional activator complex to regulate trichome initiation in Arabidopsis. In this present study, we found that NbGIS could positively regulate glandular trichome development in Nicotiana benthamiana (tobacco). Our result demonstrated that 35S:NbGIS lines exhibited much higher densities of trichome on leaves, main stems, lateral branches and sepals than WT plants, while NbGIS:RNAi lines had the opposite phenotypes. Furthermore, our results also showed that NbGIS was required in response to GA signal to control glandular trichome initiation in Nicotiana benthamiana. In addition, our results also showed that NbGIS significantly influenced GA accumulation and expressions of marker genes of the GA biosynthesis, might result in the changes of growth and maturation in tobacco. Lastly, our results also showed that NbMYB123-like regulated glandular trichome initiation in tobacco by acting downstream of NbGIS. These findings provide new insights to discover the molecular mechanism by which C2H2 transcriptional factors regulates glandular trichome initiation through GA signaling pathway in tobacco.
Collapse
Affiliation(s)
- Yihua Liu
- Zhejiang Key Lab of Crop Germplasm, Department of Agronomy, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - Dongdong Liu
- Zhejiang Key Lab of Crop Germplasm, Department of Agronomy, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - Ali Raza Khan
- Zhejiang Key Lab of Crop Germplasm, Department of Agronomy, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - Bohan Liu
- Zhejiang Key Lab of Crop Germplasm, Department of Agronomy, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - Minjie Wu
- Zhejiang Key Lab of Crop Germplasm, Department of Agronomy, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - Linli Huang
- Zhejiang Key Lab of Crop Germplasm, Department of Agronomy, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - Junyu Wu
- Zhejiang Key Lab of Crop Germplasm, Department of Agronomy, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - Ge Song
- Zhejiang Key Lab of Crop Germplasm, Department of Agronomy, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - Hongwei Ni
- Zhejiang Key Lab of Crop Germplasm, Department of Agronomy, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - Haiming Ying
- Zhejiang Key Lab of Crop Germplasm, Department of Agronomy, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - Hao Yu
- Department of Biological Sciences and Temasek Life Sciences Laboratory, National University of Singapore, Singapore, 117543, Singapore
| | - Yinbo Gan
- Zhejiang Key Lab of Crop Germplasm, Department of Agronomy, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China.
| |
Collapse
|
41
|
Zhou H, Liao L, Xu S, Ren F, Zhao J, Ogutu C, Wang L, Jiang Q, Han Y. Two amino acid changes in the R3 repeat cause functional divergence of two clustered MYB10 genes in peach. PLANT MOLECULAR BIOLOGY 2018; 98:169-183. [PMID: 30155830 DOI: 10.1007/s11103-018-0773-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2018] [Accepted: 08/24/2018] [Indexed: 05/23/2023]
Abstract
R2R3-MYB genes play a pivotal role in regulating anthocyanin accumulation. Here, we report two tandemly duplicated R2R3-MYB genes in peach, PpMYB10.1 and PpMYB10.2, with the latter showing lower ability to induce anthocyanin accumulation than the former. Site-directed mutation assay revealed two amino acid changes in the R3 repeat, Arg/Lys66 and Gly/Arg93, responsible for functional divergence between these two PpMYB10 genes. Anthocyanin-promoting activity of PpMYB10.2 was significantly increased by a single amino acid replacement of Arg93 with Gly93. However, either the Gly93 → Arg93 or Arg66 → Lys66 substitutions alone showed little impact on anthocyanin-promoting activity of PpMYB10.1, but simultaneous substitutions caused a significant decrease. Reciprocal substitution of Arg/Gly93 could significantly alter binding affinity to PpbHLH3, while the Arg66 → Lys66 substitution is predicted to affect the folding of the MYB DNA-binding domain, instead of PpbHLH3-binding affinity. Overall, the change of anthocyanin-promoting activity was accompanied with that of bHLH-binding affinity, suggesting that DNA-binding affinity of R2R3-MYBs depends on their bHLH partners. Our study is helpful for understanding of functional evolution of R2R3-MYBs and their interaction with DNA targets.
Collapse
Affiliation(s)
- Hui Zhou
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden of the Chinese Academy of Sciences, Wuhan, 430074, China
- Key Laboratory of Genetic Improvement and Ecophysiology of Horticultural Crops, Horticultural Institute, Anhui Academy of Agricultural Sciences, Hefei, 230031, China
| | - Liao Liao
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden of the Chinese Academy of Sciences, Wuhan, 430074, China
| | - Shengli Xu
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden of the Chinese Academy of Sciences, Wuhan, 430074, China
- University of Chinese Academy of Sciences, 19A Yuquanlu, Beijing, 100049, China
| | - Fei Ren
- Institute of Forestry and Pomology, Beijing Academy of Agriculture and Forestry Sciences, Beijing, 100097, China
| | - Jianbo Zhao
- Institute of Forestry and Pomology, Beijing Academy of Agriculture and Forestry Sciences, Beijing, 100097, China
| | - Collins Ogutu
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden of the Chinese Academy of Sciences, Wuhan, 430074, China
- University of Chinese Academy of Sciences, 19A Yuquanlu, Beijing, 100049, China
| | - Lu Wang
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden of the Chinese Academy of Sciences, Wuhan, 430074, China
| | - Quan Jiang
- Institute of Forestry and Pomology, Beijing Academy of Agriculture and Forestry Sciences, Beijing, 100097, China
| | - Yuepeng Han
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden of the Chinese Academy of Sciences, Wuhan, 430074, China.
- Sino-African Joint Research Center, Chinese Academy of Sciences, Wuhan, 430074, China.
| |
Collapse
|
42
|
Sun M, Zhang C, Lu M, Gan N, Chen Z, Deng WW, Zhang ZZ. Metabolic Flux Enhancement and Transcriptomic Analysis Displayed the Changes of Catechins Following Long-Term Pruning in Tea Trees ( Camellia sinensis). JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2018; 66:8566-8573. [PMID: 30021435 DOI: 10.1021/acs.jafc.8b02877] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
The tea tree is a perennial woody plant, and pruning is one of the most crucial cultivation measurements for tea plantation management. To date, the relationship between long-term pruning and metabolic flux enhancement in tea trees has not been studied. In this research, 11-year-old pruned tea trees from four different cultivars were randomly selected for transcriptome analysis and characteristic secondary metabolite analysis together with controls. The findings revealed that epigallocatechin gallate (EGCG) accumulation in pruned tea trees was significantly higher than that in unpruned tea trees. SCPL1A expression (encoding a class of serine carboxypeptidase), which has been reported to have a catalytic ability during EGCG biosynthesis, together with LAR, encoding leucoanthocyanidin reductase, was upregulated in the pruned tea trees. Moreover, metabolic flux enhancement and transcriptome analysis revealed low EGCG accumulation in the leaves of unpruned tea trees. Because of the bitter and astringent taste of EGCG, these results provide a certain understanding to the lower bitterness and astringency in teas from "ancient tea trees", growing in the wild with no trimming, than teas produced from pruned plantation trees.
Collapse
Affiliation(s)
- Mufang Sun
- State Key Laboratory of Tea Plant Biology and Utilization , Anhui Agricultural University , 130 Changjiang West Road , Hefei , Anhui 230036 , People's Republic of China
| | - Chengren Zhang
- Tea Science Academy , Yunnan Dianhong Group Company, Limited , Lincang , Yunnan 675900 , People's Republic of China
| | - Mengqian Lu
- State Key Laboratory of Tea Plant Biology and Utilization , Anhui Agricultural University , 130 Changjiang West Road , Hefei , Anhui 230036 , People's Republic of China
| | - Ning Gan
- State Key Laboratory of Tea Plant Biology and Utilization , Anhui Agricultural University , 130 Changjiang West Road , Hefei , Anhui 230036 , People's Republic of China
| | - Zichang Chen
- Tea Science Academy , Yunnan Dianhong Group Company, Limited , Lincang , Yunnan 675900 , People's Republic of China
| | - Wei-Wei Deng
- State Key Laboratory of Tea Plant Biology and Utilization , Anhui Agricultural University , 130 Changjiang West Road , Hefei , Anhui 230036 , People's Republic of China
| | - Zheng-Zhu Zhang
- State Key Laboratory of Tea Plant Biology and Utilization , Anhui Agricultural University , 130 Changjiang West Road , Hefei , Anhui 230036 , People's Republic of China
| |
Collapse
|
43
|
Allan AC, Espley RV. MYBs Drive Novel Consumer Traits in Fruits and Vegetables. TRENDS IN PLANT SCIENCE 2018; 23:693-705. [PMID: 30033210 DOI: 10.1016/j.tplants.2018.06.001] [Citation(s) in RCA: 74] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2018] [Revised: 06/01/2018] [Accepted: 06/05/2018] [Indexed: 05/27/2023]
Abstract
Eating plant-derived compounds can lead to a longer and healthier life and also benefits the environment. Innovation in the fresh food sector, as well as new cultivars, can improve consumption of fruit and vegetables, with MYB transcription factors being a target to drive this novelty. Plant MYB transcription factors are implicated in diverse roles including development, hormone signalling, and metabolite biosynthesis. The reds and blues of fruit and vegetables provided by anthocyanins, phlobaphenes, and betalains are controlled by specific R2R3 MYBs. New studies are now revealing that MYBs also control carotenoid biosynthesis and other quality traits, such as flavour and texture. Future breeding techniques may manipulate or create alleles of key MYB transcription factors.
Collapse
Affiliation(s)
- Andrew C Allan
- New Zealand Institute for Plant and Food Research, Mt Albert, Auckland, New Zealand; School of Biological Sciences, University of Auckland, Auckland, New Zealand.
| | - Richard V Espley
- New Zealand Institute for Plant and Food Research, Mt Albert, Auckland, New Zealand
| |
Collapse
|
44
|
Shi H, Liu G, Wei Y, Chan Z. The zinc-finger transcription factor ZAT6 is essential for hydrogen peroxide induction of anthocyanin synthesis in Arabidopsis. PLANT MOLECULAR BIOLOGY 2018; 97:165-176. [PMID: 29675814 DOI: 10.1007/s11103-018-0730-0] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Accepted: 04/16/2018] [Indexed: 05/20/2023]
Abstract
The accumulation of flavonoids is activated by various abiotic stresses, and the induction of reactive oxygen species (ROS) especially hydrogen peroxide (H2O2) is a general response to abiotic stress in plants. However, the direct link between flavonoids and H2O2 and underlying mechanism remain elusive. In this study, we found that the concentrations of anthocyanin and flavonoids were significantly induced by H2O2 treatment. Furthermore, we found that the transcript level of ZINC FINGER of ARABIDOPSIS THALIANA 6 (ZAT6) was significantly activated after exogenous H2O2 treatment, and modulation of AtZAT6 expression positively affected the concentrations of both anthocyanin and total flavonoids. Notably, exogenous H2O2-induced anthocyanin synthesis was largely alleviated in AtZAT6 knockdown plants, but showed higher level in AtZAT6 overexpressing plants. AtZAT6 directly activated the expressions of TT5, TT7, TT3, TT18, MYB12, and MYB111 through binding to their promoters with TACAAT elements of these genes, and the activation of MYB12 and MYB111 up-regulated the expressions of TT4 and TT6. Taken together, this study indicates that AtZAT6 plays important role in H2O2-activated anthocyanin synthesis, via directly binding to the promoters of several genes that involved in anthocyanin synthesis.
Collapse
Affiliation(s)
- Haitao Shi
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, Institute of Tropical Agriculture and Forestry, Hainan University, Haikou, 570228, China.
| | - Guoyin Liu
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, Institute of Tropical Agriculture and Forestry, Hainan University, Haikou, 570228, China
| | - Yunxie Wei
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, Institute of Tropical Agriculture and Forestry, Hainan University, Haikou, 570228, China
| | - Zhulong Chan
- Key Laboratory of Horticultural Plant Biology, Ministry of Education, College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan, 430070, China.
| |
Collapse
|
45
|
Chen M, Xu M, Xiao Y, Cui D, Qin Y, Wu J, Wang W, Wang G. Fine Mapping Identifies SmFAS Encoding an Anthocyanidin Synthase as a Putative Candidate Gene for Flower Purple Color in Solanum melongena L. Int J Mol Sci 2018. [PMID: 29522465 PMCID: PMC5877650 DOI: 10.3390/ijms19030789] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Anthocyanins are the main pigments in flowers and fruits. These pigments are responsible for the red, red-purple, violet, and purple color in plants, and act as insect and animal attractants. In this study, phenotypic analysis of the purple flower color in eggplant indicated that the flower color is controlled by a single dominant gene, FAS. Using an F₂ mapping population derived from a cross between purple-flowered 'Blacknite' and white-flowered 'Small Round', FlowerAnthocyanidin Synthase (FAS) was fine mapped to an approximately 165.6-kb region between InDel marker Indel8-11 and Cleaved Amplified Polymorphic Sequences (CAPS) marker Efc8-32 on Chromosome 8. On the basis of bioinformatic analysis, 29 genes were subsequently located in the FAS target region, among which were two potential Anthocyanidin Synthase (ANS) gene candidates. Allelic sequence comparison results showed that one ANS gene (Sme2.5_01638.1_g00003.1) was conserved in promoter and coding sequences without any nucleotide change between parents, whereas four single-nucleotide polymorphisms were detected in another ANS gene (Sme2.5_01638.1_g00005.1). Crucially, a single base pair deletion at site 438 resulted in premature termination of FAS, leading to the loss of anthocyanin accumulation. In addition, FAS displayed strong expression in purple flowers compared with white flowers and other tissues. Collectively, our results indicate that Sme2.5_01638.1_g00005.1 is a good candidate gene for FAS, which controls anthocyanidin synthase in eggplant flowers. The present study provides information for further potential facilitate genetic engineering for improvement of anthocyanin levels in plants.
Collapse
Affiliation(s)
- Mengqiang Chen
- Key Laboratory of Biology and Germplasm Enhancement of Horticultural Crops in South China, Ministry of Agriculture, College of Horticulture, South China Agricultural University, Guangzhou 510642, China.
- College of Horticulture, South China Agricultural University, Guangzhou 510642, China.
| | - Mengyun Xu
- College of Horticulture, South China Agricultural University, Guangzhou 510642, China.
| | - Yao Xiao
- College of Horticulture, South China Agricultural University, Guangzhou 510642, China.
| | - Dandan Cui
- College of Horticulture, South China Agricultural University, Guangzhou 510642, China.
| | - Yongqiang Qin
- College of Horticulture, South China Agricultural University, Guangzhou 510642, China.
| | - Jiaqi Wu
- College of Horticulture, South China Agricultural University, Guangzhou 510642, China.
| | - Wenyi Wang
- Department of Plant Science, Weizmann Institute of Science, Rehovot 76100, Israel.
| | - Guoping Wang
- Key Laboratory of Biology and Germplasm Enhancement of Horticultural Crops in South China, Ministry of Agriculture, College of Horticulture, South China Agricultural University, Guangzhou 510642, China.
- College of Horticulture, South China Agricultural University, Guangzhou 510642, China.
| |
Collapse
|
46
|
Feng K, Xu ZS, Que F, Liu JX, Wang F, Xiong AS. An R2R3-MYB transcription factor, OjMYB1, functions in anthocyanin biosynthesis in Oenanthe javanica. PLANTA 2018; 247:301-315. [PMID: 28965159 DOI: 10.1007/s00425-017-2783-8] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2017] [Accepted: 09/24/2017] [Indexed: 06/07/2023]
Abstract
This study showed that an R2R3-MYB transcription factor, OjMYB1, is involved in anthocyanin biosynthesis and accumulation in Oenanthe javanica. Anthocyanins can be used as safe natural food colorants, obtained from many plants. R2R3-MYB transcription factors (TFs) play important roles in anthocyanins biosynthesis during plant development. Oenanthe javanica is a popular vegetable with high nutritional values and numerous medical functions. O. javanica has purple petioles that are mainly due to anthocyanins accumulation. In the present study, the gene encoding an R2R3-MYB TF, OjMYB1, was isolated from purple O. javanica. Sequencing results showed that OjMYB1 contained a 912-bp open reading frame encoding 303 amino acids. Sequence alignments revealed that OjMYB1 contained bHLH-interaction motif ([DE]Lx2[RK]x3Lx6Lx3R) and ANDV motif ([A/G]NDV). Phylogenetic analysis indicated that the OjMYB1 classified into the anthocyanins biosynthesis clade. Subcellular localization assay showed that OjMYB1 was a nuclear protein in vivo. The heterologous expression of OjMYB1 in Arabidopsis could enhance the anthocyanins content and up-regulate the expression levels of the structural genes-related anthocyanins biosynthesis. Yeast two-hybrid assay indicated that OjMYB1 could interact with AtTT8 and AtEGL3 proteins. Enzymatic analysis revealed that overexpression of OjMYB1 gene up-regulated the enzyme activity of 3-O-glycosyltransferase encoded by AtUGT78D2 in transgenic Arabidopsis. Our results provided a comprehensive understanding of the structure and function of OjMYB1 TF in O. javanica.
Collapse
Affiliation(s)
- Kai Feng
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, China
| | - Zhi-Sheng Xu
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, China
| | - Feng Que
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, China
| | - Jie-Xia Liu
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, China
| | - Feng Wang
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, China
| | - Ai-Sheng Xiong
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, China.
| |
Collapse
|
47
|
Blanco E, Sabetta W, Danzi D, Negro D, Passeri V, Lisi AD, Paolocci F, Sonnante G. Isolation and Characterization of the Flavonol Regulator CcMYB12 From the Globe Artichoke [ Cynara cardunculus var. scolymus (L.) Fiori]. FRONTIERS IN PLANT SCIENCE 2018; 9:941. [PMID: 30026747 PMCID: PMC6042477 DOI: 10.3389/fpls.2018.00941] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Accepted: 06/12/2018] [Indexed: 05/07/2023]
Abstract
Flavonoids are a well-studied group of secondary metabolites, belonging to the phenylpropanoid pathway. Flavonoids are known to exhibit health promoting effects such as antioxidant capacities, anti-cancer and anti-inflammatory activity. Globe artichoke is an important source of bioactive phenolic compounds, including flavonoids. To study the regulation of their biosynthesis, a R2R3-MYB transcription factor, CcMYB12, was isolated from artichoke leaves. Phylogenetic analysis showed that this protein belongs to the MYB subgroup 7 (flavonol-specific MYB), which includes Arabidopsis AtMYB12, grapevine VvMYBF1, and tomato SlMYB12. CcMYB12 transcripts were detected specifically in artichoke immature inflorescence and young leaves and overlapped with the profiles of flavonol biosynthetic genes. Electrophoretic mobility shift assays (EMSAs) revealed that recombinant CcMYB12 protein is able to bind to ACII element, a DNA binding site ubiquitously present in the promoters of genes encoding flavonol biosynthetic enzymes. In transgenic Arabidopsis plants, the overexpression of CcMYB12 activated the expression of endogenous flavonol biosynthesis genes, leading to an increase of flavonol accumulation and a decrease of anthocyanins in leaves. Likewise, in transgenic tobacco petals and leaves, the overexpression of CcMYB12 decreased anthocyanin levels and increased flavonols.
Collapse
Affiliation(s)
- Emanuela Blanco
- Institute of Biosciences and Bioresources, National Research Council, Bari, Italy
- *Correspondence: Emanuela Blanco,
| | - Wilma Sabetta
- Institute of Biosciences and Bioresources, National Research Council, Bari, Italy
| | - Donatella Danzi
- Institute of Biosciences and Bioresources, National Research Council, Bari, Italy
| | - Donatella Negro
- Institute of Biosciences and Bioresources, National Research Council, Bari, Italy
| | - Valentina Passeri
- Institute of Biosciences and Bioresources, National Research Council, Perugia, Italy
| | - Antonino De Lisi
- Institute of Biosciences and Bioresources, National Research Council, Bari, Italy
| | - Francesco Paolocci
- Institute of Biosciences and Bioresources, National Research Council, Perugia, Italy
| | - Gabriella Sonnante
- Institute of Biosciences and Bioresources, National Research Council, Bari, Italy
| |
Collapse
|
48
|
Singer SD, Weselake RJ, Acharya S. Molecular Enhancement of Alfalfa: Improving Quality Traits for Superior Livestock Performance and Reduced Environmental Impact. CROP SCIENCE 2018; 58:55-71. [PMID: 0 DOI: 10.2135/cropsci2017.07.0434] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Affiliation(s)
- Stacy D. Singer
- Agriculture and Agri-Food Canada; Lethbridge Research and Development Centre; Lethbridge AB Canada T1J 4B1
| | - Randall J. Weselake
- Dep. of Agricultural, Food and Nutritional Science; Univ. of Alberta; Edmonton AB Canada T6G 2P5
| | - Surya Acharya
- Agriculture and Agri-Food Canada; Lethbridge Research and Development Centre; Lethbridge AB Canada T1J 4B1
| |
Collapse
|
49
|
Zhang B, Schrader A. TRANSPARENT TESTA GLABRA 1-Dependent Regulation of Flavonoid Biosynthesis. PLANTS (BASEL, SWITZERLAND) 2017; 6:E65. [PMID: 29261137 PMCID: PMC5750641 DOI: 10.3390/plants6040065] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Revised: 12/02/2017] [Accepted: 12/16/2017] [Indexed: 12/25/2022]
Abstract
The flavonoid composition of various tissues throughout plant development is of biological relevance and particular interest for breeding. Arabidopsis thaliana TRANSPARENT TESTA GLABRA 1 (AtTTG1) is an essential regulator of late structural genes in flavonoid biosynthesis. Here, we provide a review of the regulation of the pathway's core enzymes through AtTTG1-containing R2R3-MYELOBLASTOSIS-basic HELIX-LOOP-HELIX-WD40 repeat (MBW(AtTTG1)) complexes embedded in an evolutionary context. We present a comprehensive collection of A. thalianattg1 mutants and AtTTG1 orthologs. A plethora of MBW(AtTTG1) mechanisms in regulating the five major TTG1-dependent traits is highlighted.
Collapse
Affiliation(s)
- Bipei Zhang
- Botanical Institute, University of Cologne, Zuelpicher Str 47B, 50674 Cologne, Germany.
| | - Andrea Schrader
- Botanical Institute, University of Cologne, Zuelpicher Str 47B, 50674 Cologne, Germany.
| |
Collapse
|
50
|
Jin SW, Rahim MA, Kim HT, Park JI, Kang JG, Nou IS. Molecular analysis of anthocyanin-related genes in ornamental cabbage. Genome 2017; 61:111-120. [PMID: 29232522 DOI: 10.1139/gen-2017-0098] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Ornamental cabbage (Brassica oleracea var. acephala) is a winter-grown and important decorative plant of the family Brassicaceae, which displays an exceptional coloration in the central leaves of the rosette. Anthocyanins are the key determinant of the red, purple, and blue colors of vegetative and reproductive parts of many plant species including ornamental cabbage. Total anthocyanin content was measured spectrophotometrically, and the highest anthocyanin content was detected in the red followed by light-red and white ornamental cabbage lines. Anthocyanin biosynthesis is controlled by members of three different transcription factor (TF) families, such as MYB, basic helix-loop-helix (bHLH), and WD40 repeats (WDR), which function as a MBW complex. We identified three MYB, six bHLH, and one WDR TFs that regulate anthocyanin biosynthesis in ornamental cabbage. The expression of the regulatory and biosynthetic genes for anthocyanin synthesis was determined by qPCR. The tested structural genes of the anthocyanin pathway were shown to be up-regulated in the red followed by light-red ornamental cabbage lines; however, the expression levels of the late biosynthetic genes were barely detected in the white ornamental cabbage lines. Among the regulatory genes, BoPAP2 (MYB), BoTT8, BoEGL3.1, and BoMYC1.2 (bHLH), and BoTTG1 (WDR) were identified as candidates for the regulation of anthocyanin biosynthesis. This work could be useful for the breeding of novel colorful ornamental cabbage cultivars.
Collapse
Affiliation(s)
- Si-Won Jin
- Department of Horticulture, Sunchon National University, Suncheon 57922, Republic of Korea.,Department of Horticulture, Sunchon National University, Suncheon 57922, Republic of Korea
| | - Md Abdur Rahim
- Department of Horticulture, Sunchon National University, Suncheon 57922, Republic of Korea.,Department of Horticulture, Sunchon National University, Suncheon 57922, Republic of Korea
| | - Hoy-Taek Kim
- Department of Horticulture, Sunchon National University, Suncheon 57922, Republic of Korea.,Department of Horticulture, Sunchon National University, Suncheon 57922, Republic of Korea
| | - Jong-In Park
- Department of Horticulture, Sunchon National University, Suncheon 57922, Republic of Korea.,Department of Horticulture, Sunchon National University, Suncheon 57922, Republic of Korea
| | - Jong-Goo Kang
- Department of Horticulture, Sunchon National University, Suncheon 57922, Republic of Korea.,Department of Horticulture, Sunchon National University, Suncheon 57922, Republic of Korea
| | - Ill-Sup Nou
- Department of Horticulture, Sunchon National University, Suncheon 57922, Republic of Korea.,Department of Horticulture, Sunchon National University, Suncheon 57922, Republic of Korea
| |
Collapse
|