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Krishnamoorthi S, Tan GZH, Dong Y, Leong R, Wu TY, Urano D. Hyperspectral imaging of liverwort Marchantia polymorpha identifies MpWRKY10 as a key regulator defining Foliar pigmentation patterns. Cell Rep 2024; 43:114463. [PMID: 38985675 DOI: 10.1016/j.celrep.2024.114463] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Revised: 05/10/2024] [Accepted: 06/24/2024] [Indexed: 07/12/2024] Open
Abstract
Foliar pigmentation patterns vary among plant species and growth conditions. In this study, we utilize hyperspectral imaging to assess foliar pigmentation in the bryophyte Marchantia polymorpha under nutrient stress and identify associated genetic factors. Using singular value decomposition (SVD) for feature selection, we quantitate color variations induced by deficiencies in phosphate, nitrate, magnesium, calcium, and iron. Pseudo-colored thallus images show that disrupting MpWRKY10 causes irregular pigmentation with auronidin accumulation. Transcriptomic profiling shows that MpWRKY10 regulates phenylpropanoid pathway enzymes and R2R3-MYB transcription factors during phosphate deficiency, with MpMYB14 upregulation preceding pigment accumulation. MpWRKY10 is downregulated in older, pigmented thalli under phosphate deficiency but maintained in young thalli, where it suppresses pigmentation genes. This downregulation is absent in pigmented thalli due to aging. Comparative transcriptome analysis suggests similar WRKY and MYB roles in nutrient response and pigmentation in red-leaf lettuce, alluding to conserved genetic factors controlling foliar pigmentation patterns under nutrient deficiency.
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Affiliation(s)
| | | | - Yating Dong
- Temasek Life Sciences Laboratory, Singapore 117604, Singapore
| | - Richalynn Leong
- Temasek Life Sciences Laboratory, Singapore 117604, Singapore; Department of Biological Sciences, National University of Singapore, Singapore 117558, Singapore
| | - Ting-Ying Wu
- Temasek Life Sciences Laboratory, Singapore 117604, Singapore
| | - Daisuke Urano
- Temasek Life Sciences Laboratory, Singapore 117604, Singapore; Department of Biological Sciences, National University of Singapore, Singapore 117558, Singapore.
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Wang Z, Peng Z, Khan S, Qayyum A, Rehman A, Du X. Unveiling the power of MYB transcription factors: Master regulators of multi-stress responses and development in cotton. Int J Biol Macromol 2024; 276:133885. [PMID: 39019359 DOI: 10.1016/j.ijbiomac.2024.133885] [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: 02/03/2024] [Revised: 07/12/2024] [Accepted: 07/13/2024] [Indexed: 07/19/2024]
Abstract
Plants, being immobile, are subject to environmental stresses more than other creatures, necessitating highly effective stress tolerance systems. Transcription factors (TFs) play a crucial role in the adaptation mechanism as they can be activated by diverse signals and ultimately control the expression of stress-responsive genes. One of the most prominent plant TFs family is MYB (myeloblastosis), which is involved in secondary metabolites, developmental mechanisms, biological processes, cellular architecture, metabolic pathways, and stress responses. Extensive research has been conducted on the involvement of MYB TFs in crops, while their role in cotton remains largely unexplored. We also utilized genome-wide data to discover potential 440 MYB genes and investigated their plausible roles in abiotic and biotic stress conditions, as well as in different tissues across diverse transcriptome databases. This review primarily summarized the structure and classification of MYB TFs biotic and abiotic stress tolerance and their role in secondary metabolism in different crops, especially in cotton. However, it intends to identify gaps in current knowledge and emphasize the need for further research to enhance our understanding of MYB roles in plants.
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Affiliation(s)
- Zhenzhen Wang
- Zhengzhou Research Base, State Key Laboratory of Cotton Bio-breeding and Integrated Utilization, School of Agricultural Sciences, Zhengzhou University, Zhengzhou 450001, China; State Key Laboratory of Cotton Bio-breeding and Integrated Utilization, Institute of Cotton Research, Chinese Academy of Agricultural Sciences (ICR, CAAS), Anyang, Henan 455000, China; Research Institute of Economic Crops, Xinjiang Academy of Agricultural Sciences, Urumqi 830091, China
| | - Zhen Peng
- Zhengzhou Research Base, State Key Laboratory of Cotton Bio-breeding and Integrated Utilization, School of Agricultural Sciences, Zhengzhou University, Zhengzhou 450001, China; State Key Laboratory of Cotton Bio-breeding and Integrated Utilization, Institute of Cotton Research, Chinese Academy of Agricultural Sciences (ICR, CAAS), Anyang, Henan 455000, China
| | - Sana Khan
- Department of Plant Breeding and Genetics, University of Agriculture, Faisalabad 38040, Pakistan
| | - Abdul Qayyum
- Department of Plant Breeding and Genetics, Bahauddin Zakariya University, Multan 66000, Pakistan
| | - Abdul Rehman
- Zhengzhou Research Base, State Key Laboratory of Cotton Bio-breeding and Integrated Utilization, School of Agricultural Sciences, Zhengzhou University, Zhengzhou 450001, China; State Key Laboratory of Cotton Bio-breeding and Integrated Utilization, Institute of Cotton Research, Chinese Academy of Agricultural Sciences (ICR, CAAS), Anyang, Henan 455000, China.
| | - Xiongming Du
- Zhengzhou Research Base, State Key Laboratory of Cotton Bio-breeding and Integrated Utilization, School of Agricultural Sciences, Zhengzhou University, Zhengzhou 450001, China; State Key Laboratory of Cotton Bio-breeding and Integrated Utilization, Institute of Cotton Research, Chinese Academy of Agricultural Sciences (ICR, CAAS), Anyang, Henan 455000, China.
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3
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Ye Q, Wang H, Lin Z, Xie Q, Wang W, Chen Q. Identification of MYB Transcription Factor, a Regulator Related to Hydrolysable Tannin Synthesis in Canarium album L., and Functional Analysis of CaMYBR04. PLANTS (BASEL, SWITZERLAND) 2024; 13:1837. [PMID: 38999677 PMCID: PMC11244293 DOI: 10.3390/plants13131837] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2024] [Revised: 06/26/2024] [Accepted: 07/01/2024] [Indexed: 07/14/2024]
Abstract
Hydrolysed tannins (HTs) are polyphenols, which are related to the astringency, flavour, colour, stability, medicinal value and other characteristics of many fruits and vegetables. The biosynthetic mechanism of the majority of HTs remains unknown, and many biosynthetic pathways of HTs are speculative conclusions that have not been confirmed. The fruit of Canarium album L. (Chinese olive), which is notable for its pharmacological and edible properties, is rich in HTs. The fruit has a distinctive bitter and astringent taste when initially consumed, which mellows to a sweet sensation upon chewing. HTs serve as the primary material basis for the formation of the Chinese olive fruit's astringent quality and pharmacological effects. In this study, the fruit of C. album Changying was utilised as the research material. The objective of this study was to provide a theoretical basis for the quality control of Chinese olive fruit and the application and development of its medicinal value. In addition, the study aimed to identify and screen related MYB transcription factors involved in the synthesis of HTs in the fruit and to clarify the mechanism of MYBs in the process of synthesis and regulation of HTs in Chinese olive fruit. The principal findings were as follows. A total of 83 differentially expressed Chinese olive MYB transcription factors (CaMYBs) were identified, including 54 1R-MYBs (MYB-related), 25 2R-MYBs (R2R3-MYBs), 3 3R-MYBs, and 1 4R-MYB. Through trend analysis and correlation analysis, it was found that CaMYBR04 (Isoform0032534) exhibited a significantly higher expression (FPKM) than the other CaMYBs. The full-length cDNA sequence of CaMYBR04 was cloned and transformed into strawberry. The results demonstrated that CaMYBR04 significantly enhanced the fruit's hydrolysable tannin content. Consequently, this study elucidated the function of CaMYBR04, a regulator of the Chinese olive fruit hydrolysable tannin synthesis pathway, and established a theoretical foundation for the synthesis and regulation of fruit HTs.
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Affiliation(s)
- Qinghua Ye
- Department of Horticulture and Landscape Architecture, Fujian Vocational College of Agriculture, Fuzhou 350303, China; (Q.Y.)
- College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Huiquan Wang
- Department of Horticulture and Landscape Architecture, Fujian Vocational College of Agriculture, Fuzhou 350303, China; (Q.Y.)
| | - Zhehui Lin
- Department of Horticulture and Landscape Architecture, Fujian Vocational College of Agriculture, Fuzhou 350303, China; (Q.Y.)
| | - Qian Xie
- College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Wei Wang
- College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Qingxi Chen
- College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou 350002, China
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Yang G, Xue Z, Lin-Wang K, Chen G, Zhao Y, Chang Y, Xu S, Sun M, Xue C, Li J, Allan AC, Espley RV, Wu J. An 'activator-repressor' loop controls the anthocyanin biosynthesis in red-skinned pear. MOLECULAR HORTICULTURE 2024; 4:26. [PMID: 38945997 PMCID: PMC11215833 DOI: 10.1186/s43897-024-00102-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2024] [Accepted: 06/07/2024] [Indexed: 07/02/2024]
Abstract
The color of red-skinned pear (Pyrus spp.) is primarily attributed to accumulation of anthocyanins, which provide nutritional benefits for human health and are closely associated with the commercial value of fruits. Here, we reported the functional characterization of a R2R3-MYB repressor PyMYB107, which forms an 'activator-repressor' loop to control anthocyanin accumulation in the red-skinned pear. PyMYB107 overexpression inhibited anthocyanin biosynthesis in both pear calli and fruits, while virus-induced gene silencing of PyMYB107 increased anthocyanin accumulation in pear fruits. Furthermore, ectopic expression of PyMYB107 decreased anthocyanin accumulation in tomato, strawberry and tobacco. PyMYB107 can competitively bind to PybHLH3 with PyMYB10/MYB114, thereby suppressing the transcriptional activation of key anthocyanin biosynthesis genes, PyANS and PyUFGT. Site-directed mutagenesis showed that mutations within the R3 domain and EAR motif of PyMYB107 eliminated its repressive activity. Additionally, PyMYB107 exhibited a comparable expression pattern to PyMYB10/MYB114 and was transcriptionally activated by them. Our finding advanced comprehension of the repression mechanism underlying anthocyanin accumulation, providing valuable molecular insights into improving quality of pear fruits.
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Affiliation(s)
- Guangyan Yang
- College of Horticulture, State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, 210095, China
- Zhongshan Biological Breeding Laboratory, Nanjing, 210014, Jiangsu, China
| | - Zhaolong Xue
- College of Horticulture, State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, 210095, China
- Zhongshan Biological Breeding Laboratory, Nanjing, 210014, Jiangsu, China
| | - Kui Lin-Wang
- The New Zealand Institute for Plant & Food Research Limited, Auckland, 1025, New Zealand
| | - Guosong Chen
- College of Horticulture, State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, 210095, China
- Zhongshan Biological Breeding Laboratory, Nanjing, 210014, Jiangsu, China
| | - Yongqi Zhao
- College of Horticulture, State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, 210095, China
- Zhongshan Biological Breeding Laboratory, Nanjing, 210014, Jiangsu, China
| | - Yaojun Chang
- College of Horticulture, State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, 210095, China
| | - Shaozhuo Xu
- College of Horticulture, State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, 210095, China
| | - Manyi Sun
- College of Horticulture, State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, 210095, China
- Zhongshan Biological Breeding Laboratory, Nanjing, 210014, Jiangsu, China
| | - Cheng Xue
- State Key Laboratory of Crop Biology, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai'an, 271018, China
| | - Jiaming Li
- College of Horticulture, State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, 210095, China
- Zhongshan Biological Breeding Laboratory, Nanjing, 210014, Jiangsu, China
| | - Andrew C Allan
- The New Zealand Institute for Plant & Food Research Limited, Auckland, 1025, New Zealand
| | - Richard V Espley
- The New Zealand Institute for Plant & Food Research Limited, Auckland, 1025, New Zealand
| | - Jun Wu
- College of Horticulture, State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, 210095, China.
- Zhongshan Biological Breeding Laboratory, Nanjing, 210014, Jiangsu, China.
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Martinez-Sanchez M, Hunter DA, Saei A, Andre CM, Varkonyi-Gasic E, Clark G, Barry E, Allan AC. SmuMYB113 is the determinant of fruit color in pepino ( Solanum muricatum). FRONTIERS IN PLANT SCIENCE 2024; 15:1408202. [PMID: 38966143 PMCID: PMC11222579 DOI: 10.3389/fpls.2024.1408202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/27/2024] [Accepted: 06/03/2024] [Indexed: 07/06/2024]
Abstract
Pepino (Solanum muricatum) is an herbaceous crop phylogenetically related to tomato and potato. Pepino fruit vary in color, size and shape, and are eaten fresh. In this study, we use pepino as a fruit model to understand the transcriptional regulatory mechanisms controlling fruit quality. To identify the key genes involved in anthocyanin biosynthesis in pepino, two genotypes were studied that contrasted in foliar and fruit pigmentation. Anthocyanin profiles were analyzed, as well as the expression of genes that encode enzymes for anthocyanin biosynthesis and transcriptional regulators using both RNA-seq and quantitative PCR. The differential expression of the transcription factor genes R2R3 MYB SmuMYB113 and R3MYB SmuATV suggested their association with purple skin and foliage phenotype. Functional analysis of these genes in both tobacco and pepino showed that SmuMYB113 activates anthocyanins, while SmuATV suppresses anthocyanin accumulation. However, despite elevated expression in all tissues, SmuMYB113 does not significantly elevate flesh pigmentation, suggesting a strong repressive background in fruit flesh tissue. These results will aid understanding of the differential regulation controlling fruit quality aspects between skin and flesh in other fruiting species.
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Affiliation(s)
- Marcela Martinez-Sanchez
- The New Zealand Institute for Plant and Food Research Limited (Plant & Food Research) Mt Albert, Auckland, New Zealand
- School of Biological Sciences, University of Auckland, Auckland, New Zealand
| | - Donald A. Hunter
- The New Zealand Institute for Plant and Food Research Limited (Plant & Food Research), Palmerston North, New Zealand
| | - Ali Saei
- Grasslands Research Centre, AgResearch Limited, Palmerston North, New Zealand
| | - Christelle M. Andre
- The New Zealand Institute for Plant and Food Research Limited (Plant & Food Research) Mt Albert, Auckland, New Zealand
| | - Erika Varkonyi-Gasic
- The New Zealand Institute for Plant and Food Research Limited (Plant & Food Research) Mt Albert, Auckland, New Zealand
| | - Glen Clark
- The New Zealand Institute for Plant and Food Research Limited (Plant & Food Research) Mt Albert, Auckland, New Zealand
| | - Emma Barry
- The New Zealand Institute for Plant and Food Research Limited (Plant & Food Research) Mt Albert, Auckland, New Zealand
| | - Andrew C. Allan
- The New Zealand Institute for Plant and Food Research Limited (Plant & Food Research) Mt Albert, Auckland, New Zealand
- School of Biological Sciences, University of Auckland, Auckland, New Zealand
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Zhang X, Yu L, Zhang M, Wu T, Song T, Yao Y, Zhang J, Tian J. MdWER interacts with MdERF109 and MdJAZ2 to mediate methyl jasmonate- and light-induced anthocyanin biosynthesis in apple fruit. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2024; 118:1327-1342. [PMID: 38319946 DOI: 10.1111/tpj.16671] [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: 07/25/2023] [Revised: 01/08/2024] [Accepted: 01/27/2024] [Indexed: 02/08/2024]
Abstract
Anthocyanin generation in apples (Malus domestica) and the pigmentation that results from it may be caused by irradiation and through administration of methyl jasmonate (MeJA). However, their regulatory interrelationships associated with fruit coloration are not well defined. To determine whether MdERF109, a transcription factor (TF) involved in light-mediated coloration and anthocyanin biosynthesis, has synergistic effects with other proteins, we performed a yeast two-hybrid assessment and identified another TF, MdWER. MdWER was induced by MeJA treatment, and although overexpression of MdWER alone did not promote anthocyanin accumulation co-overexpression with MdERF109 resulted in significantly increase in anthocyanin biosynthesis. MdWER may form a protein complex with MdERF109 to promote anthocyanin accumulation by enhancing combinations between the proteins and their corresponding genes. In addition, MdWER, as a MeJA responsive protein, interacts with the anthocyanin repressor MdJAZ2. Transient co-expression in apple fruit and protein interaction assays allowed us to conclude that MdERF109 and MdJAZ2 interact with MdWER and take part in the production of anthocyanins upon MeJA treatment and irradiation. Our findings validate a role for the MdERF109-MdWER-MdJAZ2 module in anthocyanin biosynthesis and uncover a novel mechanism for how light and MeJA signals are coordinated anthocyanin biosynthesis in apple fruit.
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Affiliation(s)
- Xi Zhang
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Beijing University of Agriculture, Beijing, China
- Plant Science and Technology College, Beijing University of Agriculture, Beijing, China
| | - Lujia Yu
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Beijing University of Agriculture, Beijing, China
- Plant Science and Technology College, Beijing University of Agriculture, Beijing, China
| | - Mengjiao Zhang
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Beijing University of Agriculture, Beijing, China
- Plant Science and Technology College, Beijing University of Agriculture, Beijing, China
| | - Ting Wu
- College of Horticulture, China Agricultural University, Beijing, China
| | - Tingting Song
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Beijing University of Agriculture, Beijing, China
- Plant Science and Technology College, Beijing University of Agriculture, Beijing, China
| | - Yuncong Yao
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Beijing University of Agriculture, Beijing, China
- Plant Science and Technology College, Beijing University of Agriculture, Beijing, China
| | - Jie Zhang
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Beijing University of Agriculture, Beijing, China
- Plant Science and Technology College, Beijing University of Agriculture, Beijing, China
| | - Ji Tian
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Beijing University of Agriculture, Beijing, China
- Plant Science and Technology College, Beijing University of Agriculture, Beijing, China
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Li T, Wang J, Zhang Z, Fan Y, Qin H, Yin Y, Dai G, Cao Y, Tang L. Anthocyanin biosynthesis in goji berry is inactivated by deletion in a bHLH transcription factor LrLAN1b promoter. PLANT PHYSIOLOGY 2024; 195:1461-1474. [PMID: 38431527 DOI: 10.1093/plphys/kiae122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Revised: 09/27/2023] [Accepted: 10/08/2023] [Indexed: 03/05/2024]
Abstract
Black goji berry (Lycium ruthenicum Murray) contains a rich source of health-promoting anthocyanins which are used in herbal medicine and nutraceutical foods in China. A natural variant producing white berries allowed us to identify two key genes involved in the regulation of anthocyanin biosynthesis in goji berries: one encoding a MYB transcription factor (LrAN2-like) and one encoding a basic helix-loop-helix (bHLH) transcription factor (LrAN1b). We previously found that LrAN1b expression was lost in the white berry variant, but the molecular basis for this phenotype was unknown. Here, we identified the molecular mechanism for loss of anthocyanins in white goji berries. In white goji, the LrAN1b promoter region has a 229 bp deletion that removes three MYB-binding elements and one bHLH-binding element, which are key to its expression. Complementation of the white goji berry LrAN1b allele with the LrAN1b promoter restored pigmentation. Virus-induced gene silencing of LrAN1b in black goji berry reduced fruit anthocyanin biosynthesis. Molecular analyses showed that LrAN2-like and another bHLH transcription factor LrJAF13 can activate LrAN1b by binding directly to the MYB-recognizing element and bHLH-recognizing element of its promoter-deletion region. LrAN1b expression is enhanced by the interaction of LrAN2-like with LrJAF13 and the WD40 protein LrAN11. LrAN2-like and LrAN11 interact with either LrJAF13 or LrAN1b to form two MYB-bHLH-WD40 complexes, which hierarchically regulate anthocyanin biosynthesis in black goji berry. This study on a natural variant builds a comprehensive anthocyanin regulatory network that may be manipulated to tailor goji berry traits.
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Affiliation(s)
- Tingting Li
- Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, Sichuan Province 610065, China
| | - Jingjin Wang
- Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, Sichuan Province 610065, China
| | - Zihan Zhang
- Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, Sichuan Province 610065, China
| | - Yunfang Fan
- Institute of Wolfberry Engineering Technology, Ningxia Academy of Agriculture and Forestry Sciences, Yinchuan, Ningxia Hui Autonomous Region 750002, China
- National Wolfberry Engineering Research Center, Ningxia Academy of Agriculture and Forestry Sciences, Yinchuan, Ningxia Hui Autonomous Region, 750002, China
| | - Huan Qin
- Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, Sichuan Province 610065, China
| | - Yue Yin
- Institute of Wolfberry Engineering Technology, Ningxia Academy of Agriculture and Forestry Sciences, Yinchuan, Ningxia Hui Autonomous Region 750002, China
- National Wolfberry Engineering Research Center, Ningxia Academy of Agriculture and Forestry Sciences, Yinchuan, Ningxia Hui Autonomous Region, 750002, China
| | - Guoli Dai
- Institute of Wolfberry Engineering Technology, Ningxia Academy of Agriculture and Forestry Sciences, Yinchuan, Ningxia Hui Autonomous Region 750002, China
- National Wolfberry Engineering Research Center, Ningxia Academy of Agriculture and Forestry Sciences, Yinchuan, Ningxia Hui Autonomous Region, 750002, China
| | - Youlong Cao
- Institute of Wolfberry Engineering Technology, Ningxia Academy of Agriculture and Forestry Sciences, Yinchuan, Ningxia Hui Autonomous Region 750002, China
- National Wolfberry Engineering Research Center, Ningxia Academy of Agriculture and Forestry Sciences, Yinchuan, Ningxia Hui Autonomous Region, 750002, China
| | - Lin Tang
- Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, Sichuan Province 610065, China
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Gao Y, Regad F, Li Z, Pirrello J, Bouzayen M, Van Der Rest B. Class I TCP in fruit development: much more than growth. FRONTIERS IN PLANT SCIENCE 2024; 15:1411341. [PMID: 38863555 PMCID: PMC11165105 DOI: 10.3389/fpls.2024.1411341] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/02/2024] [Accepted: 05/13/2024] [Indexed: 06/13/2024]
Abstract
Fruit development can be viewed as the succession of three main steps consisting of the fruit initiation, growth and ripening. These processes are orchestrated by different factors, notably the successful fertilization of flowers, the environmental conditions and the hormones whose action is coordinated by a large variety of transcription factors. Among the different transcription factor families, TEOSINTE BRANCHED 1, CYCLOIDEA, PROLIFERATING CELL FACTOR (TCP) family has received little attention in the frame of fruit biology despite its large effects on several developmental processes and its action as modulator of different hormonal pathways. In this respect, the comprehension of TCP functions in fruit development remains an incomplete puzzle that needs to be assembled. Building on the abundance of genomic and transcriptomic data, this review aims at collecting available TCP expression data to allow their integration in the light of the different functional genetic studies reported so far. This reveals that several Class I TCP genes, already known for their involvement in the cell proliferation and growth, display significant expression levels in developing fruit, although clear evidence supporting their functional significance in this process remains scarce. The extensive expression data compiled in our study provide convincing elements that shed light on the specific involvement of Class I TCP genes in fruit ripening, once these reproductive organs acquire their mature size. They also emphasize their putative role in the control of specific biological processes such as fruit metabolism and hormonal dialogue.
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Affiliation(s)
- Yushuo Gao
- Laboratoire de Recherche en Sciences Veígeítales - Génomique et Biotechnologie des Fruits, Universiteí de Toulouse, Centre national de la recherche scientifique (CNRS), Université Toulouse III - Paul Sabatier (UPS), Toulouse-Institut National Polytechnique (INP), Toulouse, France
- Key Laboratory of Plant Hormones and Development Regulation of Chongqing, School of Life Sciences, Chongqing University, Chongqing, China
| | - Farid Regad
- Laboratoire de Recherche en Sciences Veígeítales - Génomique et Biotechnologie des Fruits, Universiteí de Toulouse, Centre national de la recherche scientifique (CNRS), Université Toulouse III - Paul Sabatier (UPS), Toulouse-Institut National Polytechnique (INP), Toulouse, France
| | - Zhengguo Li
- Key Laboratory of Plant Hormones and Development Regulation of Chongqing, School of Life Sciences, Chongqing University, Chongqing, China
- Center of Plant Functional Genomics, Institute of Advanced Interdisciplinary Studies, Chongqing University, Chongqing, China
| | - Julien Pirrello
- Laboratoire de Recherche en Sciences Veígeítales - Génomique et Biotechnologie des Fruits, Universiteí de Toulouse, Centre national de la recherche scientifique (CNRS), Université Toulouse III - Paul Sabatier (UPS), Toulouse-Institut National Polytechnique (INP), Toulouse, France
| | - Mondher Bouzayen
- Laboratoire de Recherche en Sciences Veígeítales - Génomique et Biotechnologie des Fruits, Universiteí de Toulouse, Centre national de la recherche scientifique (CNRS), Université Toulouse III - Paul Sabatier (UPS), Toulouse-Institut National Polytechnique (INP), Toulouse, France
- Center of Plant Functional Genomics, Institute of Advanced Interdisciplinary Studies, Chongqing University, Chongqing, China
| | - Benoît Van Der Rest
- Laboratoire de Recherche en Sciences Veígeítales - Génomique et Biotechnologie des Fruits, Universiteí de Toulouse, Centre national de la recherche scientifique (CNRS), Université Toulouse III - Paul Sabatier (UPS), Toulouse-Institut National Polytechnique (INP), Toulouse, France
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Zhao X, Feng Y, Ke D, Teng Y, Yuan Z. Comparative transcriptomic and metabolomic profiles reveal fruit peel color variation in two red pomegranate cultivars. PLANT MOLECULAR BIOLOGY 2024; 114:51. [PMID: 38691187 DOI: 10.1007/s11103-024-01446-9] [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: 07/20/2023] [Accepted: 03/23/2024] [Indexed: 05/03/2024]
Abstract
Pomegranate (Punica granatum L.) which belongs to family Lythraceae, is one of the most important fruit crops of many tropical and subtropical regions. A high variability in fruit color is observed among different pomegranate accessions, which arises from the qualitative and quantitative differences in anthocyanins. However, the mechanism of fruit color variation is still not fully elucidated. In the present study, we investigated the red color mutation between a red-skinned pomegranate 'Hongbaoshi' and a purple-red-skinned cultivar 'Moshiliu', by using transcriptomic and metabolomic approaches. A total of 51 anthocyanins were identified from fruit peels, among which 3-glucoside and 3,5-diglucoside of cyanidin (Cy), delphinidin (Dp), and pelargonidin (Pg) were dominant. High proportion of Pg in early stages of 'Hongbaoshi' but high Dp in late stages of 'Moshiliu' were characterized. The unique high levels of Cy and Dp anthocyanins accumulating from early developmental stages accounted for the purple-red phenotype of 'Moshiliu'. Transcriptomic analysis revealed an early down-regulated and late up-regulated of anthocyanin-related structure genes in 'Moshiliu' compared with 'Hongbaoshi'. Alao, ANR was specially expressed in 'Hongbaoshi', with extremely low expression levels in 'Moshiliu'. For transcription factors R2R3-MYB, the profiles demonstrated a much higher transcription levels of three subgroup (SG) 5 MYBs and a sharp decrease in expression of SG6 MYB LOC116202527 in high-anthocyanin 'Moshiliu'. SG4 MYBs exhibited two entirely different patterns, LOC116203744 and LOC116212505 were down-regulated whereas LOC116205515 and LOC116212778 were up-regulated in 'Moshiliu' pomegranate. The results indicate that specific SG members of the MYB family might promote the peel coloration in different manners and play important roles in color mutation in pomegranate.
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Affiliation(s)
- Xueqing Zhao
- Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, 210037, China.
- College of Forestry, Nanjing Forestry University, Nanjing, 210037, China.
| | - Yingyi Feng
- Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, 210037, China
- College of Forestry, Nanjing Forestry University, Nanjing, 210037, China
| | - Ding Ke
- Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, 210037, China
- College of Forestry, Nanjing Forestry University, Nanjing, 210037, China
| | - Yingfen Teng
- Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, 210037, China
- College of Forestry, Nanjing Forestry University, Nanjing, 210037, China
| | - Zhaohe Yuan
- Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, 210037, China
- College of Forestry, Nanjing Forestry University, Nanjing, 210037, China
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10
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Xue L, Liu X, Wang W, Huang D, Ren C, Huang X, Yin X, Lin-Wang K, Allan AC, Chen K, Xu C. MYB transcription factors encoded by diversified tandem gene clusters cause varied Morella rubra fruit color. PLANT PHYSIOLOGY 2024; 195:598-616. [PMID: 38319742 DOI: 10.1093/plphys/kiae063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 01/03/2024] [Accepted: 01/04/2024] [Indexed: 02/08/2024]
Abstract
Chinese bayberry (Morella rubra) is a fruit tree with a remarkable variation in fruit color, ranging from white to dark red as determined by anthocyanin content. In dark red "Biqi" (BQ), red "Dongkui" (DK), pink "Fenhong" (FH), and white "Shuijing" (SJ), we identified an anthocyanin-related MYB transcription factor-encoding gene cluster of four members, i.e. MrMYB1.1, MrMYB1.2, MrMYB1.3, and MrMYB2. Collinear analysis revealed that the MYB tandem cluster may have occurred in a highly conserved region of many eudicot genomes. Two alleles of MrMYB1.1 were observed; MrMYB1.1-1 (MrMYB1.1n) was a full-length allele and homozygous in "BQ", MrMYB1.1-2 (MrMYB1.1d) was a nonfunctional allele with a single base deletion and homozygous in "SJ", and MrMYB1.1n/MrMYB1.1d were heterozygous in "DK" and "FH". In these four cultivars, expression of MrMYB1.1, MrMYB1.2, and MrMYB2 was enhanced during ripening. Both alleles were equally expressed in MrMYB1.1n/MrMYB1.1d heterozygous cultivars as revealed by a cleaved amplified polymorphic sequence marker. Expression of MrMYB1.3 was restricted to some dark red cultivars only. Functional characterization revealed that MrMYB1.1n and MrMYB1.3 can induce anthocyanin accumulation while MrMYB1.1d, MrMYB1.2, and MrMYB2 cannot. DNA-protein interaction assays indicated that MrMYB1.1n and MrMYB1.3 can directly bind to and activate the promoters of anthocyanin-related genes via interaction with a MYC-like basic helix-loop-helix protein MrbHLH1. We concluded that the specific genotype of MrMYB1.1 alleles, as well as the exclusive expression of MrMYB1.3 in some dark red cultivars, contributes to fruit color variation. The study provides insights into the mechanisms for regulation of plant anthocyanin accumulation by MYB tandem clusters.
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Affiliation(s)
- Lei Xue
- Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Zhejiang University, Hangzhou 310058, China
| | - Xiaofen Liu
- Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Zhejiang University, Hangzhou 310058, China
| | - Wenli Wang
- Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Zhejiang University, Hangzhou 310058, China
| | - Dan Huang
- Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Zhejiang University, Hangzhou 310058, China
| | - Chuanhong Ren
- Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Zhejiang University, Hangzhou 310058, China
| | - Xiaorong Huang
- Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Zhejiang University, Hangzhou 310058, China
| | - Xueren Yin
- Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Zhejiang University, Hangzhou 310058, China
| | - Kui Lin-Wang
- New Zealand Institute for Plant & Food Research Limited, Private Bag 92169, Auckland Mail Centre, Auckland 1142, New Zealand
| | - Andrew C Allan
- New Zealand Institute for Plant & Food Research Limited, Private Bag 92169, Auckland Mail Centre, Auckland 1142, New Zealand
- School of Biological Sciences, University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
| | - Kunsong Chen
- Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Zhejiang University, Hangzhou 310058, China
| | - Changjie Xu
- Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Zhejiang University, Hangzhou 310058, China
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11
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Zhao X, Li F, Ali M, Li X, Fu X, Zhang X. Emerging roles and mechanisms of lncRNAs in fruit and vegetables. HORTICULTURE RESEARCH 2024; 11:uhae046. [PMID: 38706580 PMCID: PMC11069430 DOI: 10.1093/hr/uhae046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Accepted: 02/07/2024] [Indexed: 05/07/2024]
Abstract
With the development of genome sequencing technologies, many long non-coding RNAs (lncRNAs) have been identified in fruit and vegetables. lncRNAs are primarily transcribed and spliced by RNA polymerase II (Pol II) or plant-specific Pol IV/V, and exhibit limited evolutionary conservation. lncRNAs intricately regulate various aspects of fruit and vegetables, including pigment accumulation, reproductive tissue development, fruit ripening, and responses to biotic and abiotic stresses, through diverse mechanisms such as gene expression modulation, interaction with hormones and transcription factors, microRNA regulation, and involvement in alternative splicing. This review presents a comprehensive overview of lncRNA classification, basic characteristics, and, most importantly, recent advances in understanding their functions and regulatory mechanisms.
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Affiliation(s)
- Xiuming Zhao
- College of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo, 255000, Shandong, China
| | - Fujun Li
- College of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo, 255000, Shandong, China
| | - Maratab Ali
- College of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo, 255000, Shandong, China
| | - Xiaoan Li
- College of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo, 255000, Shandong, China
| | - Xiaodong Fu
- College of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo, 255000, Shandong, China
| | - Xinhua Zhang
- College of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo, 255000, Shandong, China
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12
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Niu M, Chen X, Guo Y, Song J, Cui J, Wang L, Su N. Sugar Signals and R2R3-MYBs Participate in Potassium-Repressed Anthocyanin Accumulation in Radish. PLANT & CELL PHYSIOLOGY 2023; 64:1601-1616. [PMID: 37862259 DOI: 10.1093/pcp/pcad111] [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: 03/30/2023] [Revised: 08/30/2023] [Accepted: 09/19/2023] [Indexed: 10/22/2023]
Abstract
Anthocyanin biosynthesis in plants is influenced by a wide range of environmental factors, such as light, temperature and nutrient availability. In this study, we revealed that the potassium-repressed anthocyanin accumulation in radish hypocotyls was associated with altered sugar distribution and sugar signaling pathways rather than changes in oxidative stress status. Sugar-feeding experiments suggested a hexokinase-independent glucose signal acted as a major contributor in regulating anthocyanin biosynthesis, transport and regulatory genes at the transcriptional level. Several R2R3-MYBs were identified as anthocyanin-related MYBs. Phylogenetic and protein sequence analyses suggested that RsMYB75 met the criteria of subgroup 6 MYB activator, while RsMYB39 and RsMYB82 seemed to be a non-canonical MYB anthocyanin activator and repressor, respectively. Through yeast-one-hybrid, dual-luciferase and transient expression assays, we confirmed that RsMYB39 strongly induced the promoter activity of anthocyanin transport-related gene RsGSTF12, while RsMYB82 significantly reduced anthocyanin biosynthesis gene RsANS1 expression. Molecular models are proposed in the discussion, allowing speculation on how these novel RsMYBs may regulate the expression levels of anthocyanin-related structural genes. Together, our data evidenced the strong impacts of potassium on sugar metabolism and signaling and its regulation of anthocyanin accumulation through different sugar signals and R2R3-MYBs in a hierarchical regulatory system.
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Affiliation(s)
- Mengyang Niu
- College of Life Sciences, Nanjing Agricultural University, No. 1, Weigang, Xiaoling Wei Street, Xuanwu District, Nanjing, Jiangsu 210095, China
| | - Xuan Chen
- College of Life Sciences, Nanjing Agricultural University, No. 1, Weigang, Xiaoling Wei Street, Xuanwu District, Nanjing, Jiangsu 210095, China
| | - Youyou Guo
- College of Life Sciences, Nanjing Agricultural University, No. 1, Weigang, Xiaoling Wei Street, Xuanwu District, Nanjing, Jiangsu 210095, China
| | - Jinxue Song
- College of Life Sciences, Nanjing Agricultural University, No. 1, Weigang, Xiaoling Wei Street, Xuanwu District, Nanjing, Jiangsu 210095, China
| | - Jin Cui
- College of Life Sciences, Zhejiang University, No. 866, Yuhangtang Road, Xihu District, Hangzhou, Zhejiang 310027, China
| | - Lu Wang
- School of Environmental and Life Sciences, University of Newcastle, University Drive, Callaghan, NSW 2308, Australia
| | - Nana Su
- College of Life Sciences, Nanjing Agricultural University, No. 1, Weigang, Xiaoling Wei Street, Xuanwu District, Nanjing, Jiangsu 210095, China
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13
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Zepeda B, Marcelis LFM, Kaiser E, Verdonk JC. Petunia as a model for MYB transcription factor action under salt stress. FRONTIERS IN PLANT SCIENCE 2023; 14:1286547. [PMID: 38155855 PMCID: PMC10753185 DOI: 10.3389/fpls.2023.1286547] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Accepted: 11/20/2023] [Indexed: 12/30/2023]
Abstract
Salinity is a current and growing problem, affecting crops worldwide by reducing yields and product quality. Plants have different mechanisms to adapt to salinity; some crops are highly studied, and their salinity tolerance mechanisms are widely known. However, there are other crops with commercial importance that still need characterization of their molecular mechanisms. Usually, transcription factors are in charge of the regulation of complex processes such as the response to salinity. MYB-TFs are a family of transcription factors that regulate various processes in plant development, and both central and specialized metabolism. MYB-TFs have been studied extensively as mediators of specialized metabolism, and some are master regulators. The influence of MYB-TFs on highly orchestrated mechanisms, such as salinity tolerance, is an attractive research target. The versatility of petunia as a model species has allowed for advances to be made in multiple fields: metabolomic pathways, quality traits, stress resistance, and signal transduction. It has the potential to be the link between horticultural crops and lab models, making it useful in translating discoveries related to the MYB-TF pathways into other crops. We present a phylogenetic tree made with Petunia axillaris and Petunia inflata R2R3-MYB subfamily sequences, which could be used to find functional conservation between different species. This work could set the foundations to improve salinity resistance in other commercial crops in later studies.
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Affiliation(s)
| | | | | | - Julian C. Verdonk
- Horticulture and Product Physiology, Department of Plant Sciences, Wageningen University & Research, Wageningen, Netherlands
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14
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Zhou Y, Huang L, Liu S, Zhao M, Liu J, Lin L, Liu K. Physiological and transcriptomic analysis of IAA-induced antioxidant defense and cell wall metabolism in postharvest mango fruit. Food Res Int 2023; 174:113504. [PMID: 37986499 DOI: 10.1016/j.foodres.2023.113504] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Revised: 09/14/2023] [Accepted: 09/22/2023] [Indexed: 11/22/2023]
Abstract
Mango fruit tend to oxidize and senescence rapidly after harvesting, significantly reducing their commercial value. This study investigated the effect of exogenous auxin indole-3-acetic acid (IAA) on fruit quality, antioxidant system, and cell wall metabolism of mango fruit during storage. The results showed that the 1.0 mM IAA treatment delayed weight loss and maintained the firmness, pH and contents of total soluble solids (TSS) and titratable acidity (TA) of the mango fruit. The 1.0 mM IAA treatment increased the peroxidase (POD) and phenylalanine ammonia-lyase (PAL) activities and the ascorbic acid (AsA) and total phenols (TP) contents but decreased the polyphenol oxidase (PPO) activity in postharvest mango fruit. Moreover, beta-galactosidase (β-Gal) and polygalacturonase (PG) activities were increased, but the pectinesterase (PME) activity was decreased in the IAA-treated fruit. Transcriptome analysis showed that the differentially expressed genes (DEGs) in the IAA vs. control groups were mainly associated with oxidative stress responses, cell wall metabolism, and transcription factors (TFs). The IAA treatment upregulated the antioxidant-related genes (SOD, CAT1, PODs, GSTs, Prxs, and Trxs) and MYB TFs, and downregulated cell wall metabolism-related genes (PG, PME31 and two PME63) and 11 ethylene-responsive transcription factors (ERFs). These results suggested that exogenous IAA could improve the antioxidant system and maintain the storage quality of mango fruit by regulating gene expression and metabolic pathways. The results provide insights into the mechanisms involved in IAA-mediated delayed ripening and senescence of mango fruit.
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Affiliation(s)
- Yan Zhou
- Life Science and Technology School, Lingnan Normal University, Zhanjiang 524048, China.
| | - Lei Huang
- Life Science and Technology School, Lingnan Normal University, Zhanjiang 524048, China
| | - Shuyi Liu
- Life Science and Technology School, Lingnan Normal University, Zhanjiang 524048, China
| | - Miaoyu Zhao
- Life Science and Technology School, Lingnan Normal University, Zhanjiang 524048, China
| | - Jiameng Liu
- Agricultural Products Processing Research Institute, Chinese Academy of Tropical Agricultural Sciences, Hainan Key Laboratory of Storage and Processing of Fruits and Vegetables, Zhanjiang 524001, China
| | - Lijing Lin
- Agricultural Products Processing Research Institute, Chinese Academy of Tropical Agricultural Sciences, Hainan Key Laboratory of Storage and Processing of Fruits and Vegetables, Zhanjiang 524001, China
| | - Kaidong Liu
- Life Science and Technology School, Lingnan Normal University, Zhanjiang 524048, China.
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15
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Espley RV, Jaakola L. The role of environmental stress in fruit pigmentation. PLANT, CELL & ENVIRONMENT 2023; 46:3663-3679. [PMID: 37555620 DOI: 10.1111/pce.14684] [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: 05/31/2023] [Revised: 07/24/2023] [Accepted: 07/31/2023] [Indexed: 08/10/2023]
Abstract
For many fruit crops, the colour of the fruit outwardly defines its eating quality. Fruit pigments provide reproductive advantage for the plant as well as providing protection against unfavourable environmental conditions and pathogens. For consumers these colours are considered attractive and provide many of the dietary benefits derived from fruits. In the majority of species, the main pigments are either carotenoids and/or anthocyanins. They are produced in the fruit as part of the ripening process, orchestrated by phytohormones and an ensuing transcriptional cascade, culminating in pigment biosynthesis. Whilst this is a controlled developmental process, the production of pigments is also attuned to environmental conditions such as light quantity and quality, availability of water and ambient temperature. If these factors intensify to stress levels, fruit tissues respond by increasing (or ceasing) pigment production. In many cases, if the stress is not severe, this can have a positive outcome for fruit quality. Here, we focus on the principal environmental factors (light, temperature and water) that can influence fruit colour.
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Affiliation(s)
- Richard V Espley
- Department of New Cultivar Innovation, The New Zealand Institute for Plant and Food Research Ltd, Auckland, New Zealand
| | - Laura Jaakola
- Department of Arctic and Marine Biology, UiT The Arctic University of Norway, Tromsø, Norway
- Norwegian Institute of Bioeconomy Research (NIBIO), Ås, Norway
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16
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Wang Y, Liu Y, Zhang L, Tang L, Xu S, Wang Z, Zhang Y, Lin Y, Wang Y, Li M, Zhang Y, Luo Y, Chen Q, Tang H. A Novel R2R3-MYB Transcription Factor FaMYB10-like Promotes Light-Induced Anthocyanin Accumulation in Cultivated Strawberry. Int J Mol Sci 2023; 24:16561. [PMID: 38068883 PMCID: PMC10706590 DOI: 10.3390/ijms242316561] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Revised: 11/16/2023] [Accepted: 11/19/2023] [Indexed: 12/18/2023] Open
Abstract
Anthocyanins widely accumulate in the vegetative and reproductive tissues of strawberries and play an important role in stress resistance and fruit quality. Compared with other fruits, little is known about the molecular mechanisms regulating anthocyanin accumulation in strawberry vegetative tissues. In this study, we revealed an R2R3-MYB transcription factor, FaMYB10-like (FaMYB10L), which positively regulated anthocyanin accumulation and was induced by light in the petiole and runner of cultivated strawberry. FaMYB10L is a homologue of FveMYB10-like and a nuclear localization protein. Transient overexpression of FaMYB10L in a white fruit strawberry variety (myb10 mutant) rescued fruit pigmentation, and further qR-PCR analysis revealed that FaMYB10L upregulated the expression levels of anthocyanin biosynthesis-related genes and transport gene. A dual luciferase assay showed that FaMYB10L could activate the anthocyanin transport gene FaRAP. Anthocyanin accumulation was observed in FaMYB10L-overexpressing strawberry calli, and light treatment enhanced anthocyanin accumulation. Furthermore, transcriptomic profiling indicated that the DEGs involved in the flavonoid biosynthesis pathway and induced by light were enriched in FaMYB10L-overexpressing strawberry calli. In addition, yeast two-hybrid assays and luciferase complementation assays indicated that FaMYB10L could interact with bHLH3. These findings enriched the light-involved regulatory network of anthocyanin metabolism in cultivated strawberries.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | | | | | - Haoru Tang
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China; (Y.W.); (Y.L.); (L.Z.); (L.T.); (S.X.); (Z.W.); (Y.Z.); (Y.L.); (Y.W.); (M.L.); (Y.Z.); (Y.L.); (Q.C.)
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17
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Liu Y, Singh SK, Pattanaik S, Wang H, Yuan L. Light regulation of the biosynthesis of phenolics, terpenoids, and alkaloids in plants. Commun Biol 2023; 6:1055. [PMID: 37853112 PMCID: PMC10584869 DOI: 10.1038/s42003-023-05435-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Accepted: 10/09/2023] [Indexed: 10/20/2023] Open
Abstract
Biosynthesis of specialized metabolites (SM), including phenolics, terpenoids, and alkaloids, is stimulated by many environmental factors including light. In recent years, significant progress has been made in understanding the regulatory mechanisms involved in light-stimulated SM biosynthesis at the transcriptional, posttranscriptional, and posttranslational levels of regulation. While several excellent recent reviews have primarily focused on the impacts of general environmental factors, including light, on biosynthesis of an individual class of SM, here we highlight the regulation of three major SM biosynthesis pathways by light-responsive gene expression, microRNA regulation, and posttranslational modification of regulatory proteins. In addition, we present our future perspectives on this topic.
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Affiliation(s)
- Yongliang Liu
- Department of Plant and Soil Sciences and Kentucky Tobacco Research and Development Center, University of Kentucky, Lexington, KY, 40546, USA
| | - Sanjay K Singh
- Department of Plant and Soil Sciences and Kentucky Tobacco Research and Development Center, University of Kentucky, Lexington, KY, 40546, USA
| | - Sitakanta Pattanaik
- Department of Plant and Soil Sciences and Kentucky Tobacco Research and Development Center, University of Kentucky, Lexington, KY, 40546, USA.
| | - Hongxia Wang
- Shanghai Chenshan Plant Science Research Center, Chinese Academy of Sciences Chenshan Botanical Garden, 3888 Chenhua Road, 201602, Songjiang, Shanghai, China.
| | - Ling Yuan
- Department of Plant and Soil Sciences and Kentucky Tobacco Research and Development Center, University of Kentucky, Lexington, KY, 40546, USA.
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18
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Liu Y, Tang L, Wang Y, Zhang L, Xu S, Wang X, He W, Zhang Y, Lin Y, Wang Y, Li M, Wang X, Zhang Y, Luo Y, Chen Q, Tang H. The blue light signal transduction module FaCRY1-FaCOP1-FaHY5 regulates anthocyanin accumulation in cultivated strawberry. FRONTIERS IN PLANT SCIENCE 2023; 14:1144273. [PMID: 37360713 PMCID: PMC10289005 DOI: 10.3389/fpls.2023.1144273] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/14/2023] [Accepted: 05/23/2023] [Indexed: 06/28/2023]
Abstract
Anthocyanins have important physiological functions and are beneficial to the improvement of fruit quality in strawberry. Light is important for anthocyanin biosynthesis, and specific light quality was identified to promote anthocyanin accumulation in many fruits. However, research on the molecular mechanisms of anthocyanin accumulation regulated by light quality in strawberry remains limited. Here we described the effects of red- and blue-light irradiation on anthocyanin accumulation in strawberry. The results showed that blue light, rather than red light, could lead to the rapid accumulation of anthocyanins after exposure to light for 48 hours. The transcriptional levels of anthocyanin structural and regulatory genes displayed similar trend to the anthocyanin content. To investigate the mechanism of blue light-induced anthocyanin accumulation, the homologs of Arabidopsis blue light signal transduction components, including the blue light photoreceptor FaCRY1, an E3 ubiquitin ligase FaCOP1 and light-responsive factor FaHY5, were cloned from the strawberry cultivar 'Benihoppe'. The protein-protein interaction of FaCRY1-FaCOP1-FaHY5 was revealed by yeast two-hybrid and fluorescence signal assays. Functional complementation analysis showed that overexpression of either FaCOP1 or FaHY5 restored the anthocyanin content and hypocotyl length in corresponding Arabidopsis mutants under blue light. Moreover, dual-luciferase assays showed that FaHY5 could increase the activity of FaRAP (anthocyanin transport gene) promoter and that this function relied on other, likely B-box protein FaBBX22, factors. The overexpression of FaHY5-VP16 (chimeric activator form of FaHY5) and FaBBX22 promoted the accumulation of anthocyanins in transgenic strawberry plants. Further, transcriptomic profiling indicated that the genes involved in the phenylpropanoid biosynthesis pathway were enriched in both FaHY5-VP16-OX and FaBBX22-OX strawberry plants. In summary, our findings provide insights into a mechanism involving the regulation of blue light-induced anthocyanin accumulation via a FaCRY1-FaCOP1-FaHY5 signal transduction module in strawberry.
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Affiliation(s)
- Yongqiang Liu
- College of Horticulture, Sichuan Agricultural University, Chengdu, China
- Institute of Pomology and Olericulture, Sichuan Agricultural University, Chengdu, China
| | - Li Tang
- College of Horticulture, Sichuan Agricultural University, Chengdu, China
| | - Yiping Wang
- College of Horticulture, Sichuan Agricultural University, Chengdu, China
| | - Lianxi Zhang
- College of Horticulture, Sichuan Agricultural University, Chengdu, China
| | - Shiqiong Xu
- College of Horticulture, Sichuan Agricultural University, Chengdu, China
| | - Xiao Wang
- College of Horticulture, Sichuan Agricultural University, Chengdu, China
| | - Wen He
- Institute of Pomology and Olericulture, Sichuan Agricultural University, Chengdu, China
| | - Yunting Zhang
- Institute of Pomology and Olericulture, Sichuan Agricultural University, Chengdu, China
| | - Yuanxiu Lin
- Institute of Pomology and Olericulture, Sichuan Agricultural University, Chengdu, China
| | - Yan Wang
- Institute of Pomology and Olericulture, Sichuan Agricultural University, Chengdu, China
| | - Mengyao Li
- College of Horticulture, Sichuan Agricultural University, Chengdu, China
| | - Xiaorong Wang
- Institute of Pomology and Olericulture, Sichuan Agricultural University, Chengdu, China
| | - Yong Zhang
- College of Horticulture, Sichuan Agricultural University, Chengdu, China
| | - Ya Luo
- College of Horticulture, Sichuan Agricultural University, Chengdu, China
| | - Qing Chen
- College of Horticulture, Sichuan Agricultural University, Chengdu, China
| | - Haoru Tang
- College of Horticulture, Sichuan Agricultural University, Chengdu, China
- Institute of Pomology and Olericulture, Sichuan Agricultural University, Chengdu, China
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19
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Jian W, Ou X, Sun L, Chen Y, Liu S, Lu W, Yang X, Zhao Z, Li Z. Characterization of anthocyanin accumulation, nutritional properties, and postharvest attributes of transgenic purple tomato. Food Chem 2023; 408:135181. [PMID: 36525727 DOI: 10.1016/j.foodchem.2022.135181] [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: 10/12/2022] [Revised: 11/26/2022] [Accepted: 12/06/2022] [Indexed: 12/13/2022]
Abstract
Anthocyanins are natural pigments with diverse physiological roles and protective effects, but most tomatoes produce little. In this study, the anthocyanin characteristics, nutritional properties, and postharvest attributes of purple tomato (SlMYB75-OE) obtained by overexpression of SlMYB75 gene were first analyzed. Compared to wild-type (WT), eight monomeric anthocyanins were newly produced by overexpression of SlMYB75, and further study demonstrated the expression of dihydroflavonol-4-reductase (SlDFR) and two UDP-glycosyltransferase (SlUGTs) genes was activated by SlMYB75. The contents of sugars (sucrose, glucose, and fructose) and citric acid content in SlMYB75-OE were higher and lower, respectively, than in WT. In addition, FRAP and DPPH assays indicated SlMYB75-OE had higher antioxidant capacity, when compared to WT. Moreover, SlMYB75-OE exhibited a longer shelf life and stronger resistance to Botrytis cinerea than WT, and this characteristic was positively correlated with anthocyanin content. These results help to clarify the function of SlMYB75 and provide a reference for tomato breeding.
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Affiliation(s)
- Wei Jian
- School of Life Sciences, Chongqing Normal University, Chongqing 401331, China; Key Laboratory of Plant Hormones and Development Regulation of Chongqing, School of Life Sciences, Chongqing University, Chongqing 401331, China
| | - Xiaogang Ou
- School of Life Sciences, Chongqing Normal University, Chongqing 401331, China
| | - Lixinyu Sun
- School of Life Sciences, Chongqing Normal University, Chongqing 401331, China
| | - Yu Chen
- School of Life Sciences, Chongqing Normal University, Chongqing 401331, China
| | - Shiyu Liu
- School of Life Sciences, Chongqing Normal University, Chongqing 401331, China
| | - Wang Lu
- Key Laboratory of Plant Hormones and Development Regulation of Chongqing, School of Life Sciences, Chongqing University, Chongqing 401331, China
| | - Xian Yang
- School of Life Sciences, Chongqing Normal University, Chongqing 401331, China
| | - Zhengwu Zhao
- School of Life Sciences, Chongqing Normal University, Chongqing 401331, China.
| | - Zhengguo Li
- Key Laboratory of Plant Hormones and Development Regulation of Chongqing, School of Life Sciences, Chongqing University, Chongqing 401331, China.
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Zhang YS, Xu Y, Xing WT, Wu B, Huang DM, Ma FN, Zhan RL, Sun PG, Xu YY, Song S. Identification of the passion fruit ( Passiflora edulis Sims) MYB family in fruit development and abiotic stress, and functional analysis of PeMYB87 in abiotic stresses. FRONTIERS IN PLANT SCIENCE 2023; 14:1124351. [PMID: 37215287 PMCID: PMC10196401 DOI: 10.3389/fpls.2023.1124351] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Accepted: 03/21/2023] [Indexed: 05/24/2023]
Abstract
Environmental stresses are ubiquitous in agricultural cultivation, and they affect the healthy growth and development of edible tissues in passion fruit. The study of resistance mechanisms is important in understanding the adaptation and resistance of plants to environmental stresses. In this work, two differently resistant passion fruit varieties were selected, using the expression characteristics of the transcription factor MYB, to explore the resistance mechanism of the MYB gene under various environmental stresses. A total of 174 MYB family members were identified using high-quality passion fruit genomes: 98 2R-MYB, 5 3R-MYB, and 71 1R-MYB (MYB-relate). Their family information was systematically analyzed, including subcellular localization, physicochemical properties, phylogeny at the genomic level, promoter function, encoded proteins, and reciprocal regulation. In this study, bioinformatics and transcriptome sequencing were used to identify members of the PeMYB genes in passion fruit whole-genome data, and biological techniques, such as qPCR, gene clone, and transient transformation of yeast, were used to determine the function of the passion fruit MYB genes in abiotic stress tolerance. Transcriptomic data were obtained for differential expression characteristics of two resistant and susceptible varieties, three expression patterns during pulp development, and four induced expression patterns under abiotic stress conditions. We further focused on the resistance mechanism of PeMYB87 in environmental stress, and we selected 10 representative PeMYB genes for quantitative expression verification. Most of the genes were differentially induced by four abiotic stresses, among which PeMYB87 responded significantly to high-temperature-induced expression and overexpression of the PeMYB87 gene in the yeast system. The transgenic PeMYB87 in yeast showed different degrees of stress resistance under exposure to cold, high temperatures, drought, and salt stresses. These findings lay the foundation for further analysis of the biological functions of PeMYBs involved in stress resistance in passion fruit.
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Affiliation(s)
- Yan-shu Zhang
- National Key Laboratory for Tropical Crop Breeding, Haikou Experimental Station, Tropical Crops Genetic Resources Institute, CATAS/ Germplasm Repository of Passiflora, Haikou, Hainan, China
- Hainan Key Laboratory for Biosafety Monitoring and Molecular Breeding in Off-Season Reproduction Regions, Sanya Research Institute, Chinese Academy of Tropical Agricultural Sciences, Sanya, Hainan, China
- Hainan Yazhou Bay Seed Laboratory, Sanya, Hainan, China
- College of Landscape and Horticulture, Southwest Forestry University, Kunming, Yunnan, China
| | - Yi Xu
- National Key Laboratory for Tropical Crop Breeding, Haikou Experimental Station, Tropical Crops Genetic Resources Institute, CATAS/ Germplasm Repository of Passiflora, Haikou, Hainan, China
- Hainan Key Laboratory for Biosafety Monitoring and Molecular Breeding in Off-Season Reproduction Regions, Sanya Research Institute, Chinese Academy of Tropical Agricultural Sciences, Sanya, Hainan, China
- Hainan Yazhou Bay Seed Laboratory, Sanya, Hainan, China
| | - Wen-ting Xing
- National Key Laboratory for Tropical Crop Breeding, Haikou Experimental Station, Tropical Crops Genetic Resources Institute, CATAS/ Germplasm Repository of Passiflora, Haikou, Hainan, China
- Hainan Key Laboratory for Biosafety Monitoring and Molecular Breeding in Off-Season Reproduction Regions, Sanya Research Institute, Chinese Academy of Tropical Agricultural Sciences, Sanya, Hainan, China
| | - Bin Wu
- National Key Laboratory for Tropical Crop Breeding, Haikou Experimental Station, Tropical Crops Genetic Resources Institute, CATAS/ Germplasm Repository of Passiflora, Haikou, Hainan, China
- Hainan Key Laboratory for Biosafety Monitoring and Molecular Breeding in Off-Season Reproduction Regions, Sanya Research Institute, Chinese Academy of Tropical Agricultural Sciences, Sanya, Hainan, China
| | - Dong-mei Huang
- National Key Laboratory for Tropical Crop Breeding, Haikou Experimental Station, Tropical Crops Genetic Resources Institute, CATAS/ Germplasm Repository of Passiflora, Haikou, Hainan, China
- Hainan Key Laboratory for Biosafety Monitoring and Molecular Breeding in Off-Season Reproduction Regions, Sanya Research Institute, Chinese Academy of Tropical Agricultural Sciences, Sanya, Hainan, China
| | - Fu-ning Ma
- National Key Laboratory for Tropical Crop Breeding, Haikou Experimental Station, Tropical Crops Genetic Resources Institute, CATAS/ Germplasm Repository of Passiflora, Haikou, Hainan, China
- Hainan Key Laboratory for Biosafety Monitoring and Molecular Breeding in Off-Season Reproduction Regions, Sanya Research Institute, Chinese Academy of Tropical Agricultural Sciences, Sanya, Hainan, China
- Hainan Yazhou Bay Seed Laboratory, Sanya, Hainan, China
| | - Ru-lin Zhan
- National Key Laboratory for Tropical Crop Breeding, Haikou Experimental Station, Tropical Crops Genetic Resources Institute, CATAS/ Germplasm Repository of Passiflora, Haikou, Hainan, China
- Hainan Key Laboratory for Biosafety Monitoring and Molecular Breeding in Off-Season Reproduction Regions, Sanya Research Institute, Chinese Academy of Tropical Agricultural Sciences, Sanya, Hainan, China
- Hainan Yazhou Bay Seed Laboratory, Sanya, Hainan, China
| | - Pei-guang Sun
- National Key Laboratory for Tropical Crop Breeding, Haikou Experimental Station, Tropical Crops Genetic Resources Institute, CATAS/ Germplasm Repository of Passiflora, Haikou, Hainan, China
- Hainan Key Laboratory for Biosafety Monitoring and Molecular Breeding in Off-Season Reproduction Regions, Sanya Research Institute, Chinese Academy of Tropical Agricultural Sciences, Sanya, Hainan, China
- Hainan Yazhou Bay Seed Laboratory, Sanya, Hainan, China
| | - Yong-yan Xu
- College of Landscape and Horticulture, Southwest Forestry University, Kunming, Yunnan, China
| | - Shun Song
- National Key Laboratory for Tropical Crop Breeding, Haikou Experimental Station, Tropical Crops Genetic Resources Institute, CATAS/ Germplasm Repository of Passiflora, Haikou, Hainan, China
- Hainan Key Laboratory for Biosafety Monitoring and Molecular Breeding in Off-Season Reproduction Regions, Sanya Research Institute, Chinese Academy of Tropical Agricultural Sciences, Sanya, Hainan, China
- Hainan Yazhou Bay Seed Laboratory, Sanya, Hainan, China
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Li N, Liu Y, Yin Y, Gao S, Wu F, Yu C, Wang F, Kang B, Xu K, Jiao C, Yao M. Identification of CaPs locus involving in purple stripe formation on unripe fruit, reveals allelic variation and alternative splicing of R2R3-MYB transcription factor in pepper ( Capsicum annuum L.). FRONTIERS IN PLANT SCIENCE 2023; 14:1140851. [PMID: 37056500 PMCID: PMC10089288 DOI: 10.3389/fpls.2023.1140851] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Accepted: 03/02/2023] [Indexed: 06/19/2023]
Abstract
The purple color of unripe pepper fruit is attributed to the accumulation of anthocyanins. Only a few genes controlling the biosynthesis and regulation of anthocyanins have been cloned in Capsicum. In this study, we performed a bulked segregant analysis of the purple striped trait using an F2 population derived from a cross between the immature purple striped fruit line Chen12-4-1-1-1-1 and the normal green fruit line Zhongxian101-M-F9. We mapped the CaPs locus to an 841.39 kb region between markers M-CA690-Xba and MCA710-03 on chromosome 10. CA10g11690 encodes an R2R3-MYB transcription factor that is involved in the biosynthesis of anthocyanins as the best candidate gene. Overexpression and silencing in transformed tobacco (Nicotiana tabacum) lines indicated that CA10g11690 is involved in the formation of purple stripes in the exocarp. A comparison of parental sequences identified an insertion fragment of 1,926 bp in the second intron region of Chen12-4, and eight SNPs were detected between the two parents. Additionally, there were 49 single nucleotide polymorphic variations, two sequence deletions, and four sequence insertions in the promoter region. We found that CA10g11690 undergoes alternative splicing and generates different transcripts. Thus, the functional transcript of CA10g11690 appeared to be primarily involved in the development of purple phenotype in the exocarp. Our data provide new insight into the mechanism of anthocyanin biosynthesis and a theoretical basis for the future breeding of purple striped pepper varieties.
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Affiliation(s)
- Ning Li
- Hubei Key Laboratory of Vegetable Germplasm Innovation and Genetic Improvement, Cash Crops Research Institute, Hubei Academy of Agricultural Sciences, Wuhan, China
| | - Yabo Liu
- Hubei Key Laboratory of Vegetable Germplasm Innovation and Genetic Improvement, Cash Crops Research Institute, Hubei Academy of Agricultural Sciences, Wuhan, China
- College of Horticulture and Gardening, Yangtze University, Jingzhou, China
| | - Yanxu Yin
- Hubei Key Laboratory of Vegetable Germplasm Innovation and Genetic Improvement, Cash Crops Research Institute, Hubei Academy of Agricultural Sciences, Wuhan, China
| | - Shenghua Gao
- Hubei Key Laboratory of Vegetable Germplasm Innovation and Genetic Improvement, Cash Crops Research Institute, Hubei Academy of Agricultural Sciences, Wuhan, China
| | - Fangyuan Wu
- Hubei Key Laboratory of Vegetable Germplasm Innovation and Genetic Improvement, Cash Crops Research Institute, Hubei Academy of Agricultural Sciences, Wuhan, China
| | - Chuying Yu
- Hubei Key Laboratory of Vegetable Germplasm Innovation and Genetic Improvement, Cash Crops Research Institute, Hubei Academy of Agricultural Sciences, Wuhan, China
| | - Fei Wang
- Hubei Key Laboratory of Vegetable Germplasm Innovation and Genetic Improvement, Cash Crops Research Institute, Hubei Academy of Agricultural Sciences, Wuhan, China
| | - Byoung−Cheorl Kang
- Department of Agriculture, Forestry, and Bioresources, Plant Genomics Breeding Institute, College of Agriculture and Life Sciences, Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, Republic of Korea
| | - Kai Xu
- Hubei Key Laboratory of Vegetable Germplasm Innovation and Genetic Improvement, Cash Crops Research Institute, Hubei Academy of Agricultural Sciences, Wuhan, China
| | - Chunhai Jiao
- Hubei Key Laboratory of Vegetable Germplasm Innovation and Genetic Improvement, Cash Crops Research Institute, Hubei Academy of Agricultural Sciences, Wuhan, China
| | - Minghua Yao
- Hubei Key Laboratory of Vegetable Germplasm Innovation and Genetic Improvement, Cash Crops Research Institute, Hubei Academy of Agricultural Sciences, Wuhan, China
- Hubei Hongshan Laboratory, Wuhan, China
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22
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Sun M, Xu QY, Zhu ZP, Liu PZ, Yu JX, Guo YX, Tang S, Yu ZF, Xiong AS. AgMYB5, an MYB transcription factor from celery, enhanced β-carotene synthesis and promoted drought tolerance in transgenic Arabidopsis. BMC PLANT BIOLOGY 2023; 23:151. [PMID: 36941578 PMCID: PMC10029358 DOI: 10.1186/s12870-023-04157-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Accepted: 03/06/2023] [Indexed: 06/18/2023]
Abstract
BACKGROUND Water shortage caused by global warming seriously affects the yield and quality of vegetable crops. β-carotene, the lipid-soluble natural product with important pharmacological value, is abundant in celery. Transcription factor MYB family extensively disperses in plants and plays regulatory roles in carotenoid metabolism and water scarcity response. RESULTS Here, the AgMYB5 gene encoding 196 amino acids was amplified from celery cv. 'Jinnanshiqin'. In celery, the expression of AgMYB5 exhibited transactivation activity, tissue specificity, and drought-condition responsiveness. Further analysis proved that ectopic expression of AgMYB5 increased β-carotene content and promoted drought tolerance in transgenic Arabidopsis thaliana. Moreover, AgMYB5 expression promoted β-carotene biosynthesis by triggering the expression of AtCRTISO and AtLCYB, which in turn increased antioxidant enzyme activities, and led to the decreased contents of H2O2 and MDA, and the inhibition of O2- generation. Meanwhile, β-carotene accumulation promoted endogenous ABA biosynthesis of transgenic Arabidopsis, which resulted in ABA-induced stomatal closing and delayed water loss. In addition, ectopic expression of AgMYB5 increased expression levels of AtERD1, AtP5CS1, AtRD22, and AtRD29. CONCLUSIONS The findings indicated that AgMYB5 up-regulated β-carotene biosynthesis and drought tolerance of Arabidopsis.
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Affiliation(s)
- Miao Sun
- College of Marine and Biological Engineering, Yancheng Teachers University, Yancheng, 224002, Jiangsu, China
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, Jiangsu, China
- College of Food Science and Technology, Nanjing Agricultural University, Jiangsu, 210095, China
| | - Qin-Yi Xu
- College of Marine and Biological Engineering, Yancheng Teachers University, Yancheng, 224002, Jiangsu, China
| | - Zhi-Peng Zhu
- College of Marine and Biological Engineering, Yancheng Teachers University, Yancheng, 224002, Jiangsu, China
| | - Pei-Zhuo Liu
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, Jiangsu, China
| | - Jian-Xiang Yu
- College of Marine and Biological Engineering, Yancheng Teachers University, Yancheng, 224002, Jiangsu, China
| | - Yao-Xian Guo
- College of Marine and Biological Engineering, Yancheng Teachers University, Yancheng, 224002, Jiangsu, China
| | - Shu Tang
- College of Marine and Biological Engineering, Yancheng Teachers University, Yancheng, 224002, Jiangsu, China
| | - Zhi-Fang Yu
- College of Food Science and Technology, Nanjing Agricultural University, Jiangsu, 210095, China
| | - Ai-Sheng Xiong
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, Jiangsu, China.
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23
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Wang Y, Xiao Y, Sun Y, Zhang X, Du B, Turupu M, Yao Q, Gai S, Tong S, Huang J, Li T. Two B-box proteins, PavBBX6/9, positively regulate light-induced anthocyanin accumulation in sweet cherry. PLANT PHYSIOLOGY 2023:kiad137. [PMID: 36930566 DOI: 10.1093/plphys/kiad137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Accepted: 02/03/2023] [Indexed: 06/18/2023]
Abstract
Anthocyanin production in bicolored sweet cherry (Prunus avium cv. Rainier) fruit is induced by light exposure, leading to red coloration. The phytohormone abscisic acid (ABA) is essential for this process, but the regulatory relationships that link light and ABA with anthocyanin-associated coloration are currently unclear. In this study, we determined that light treatment of bicolored sweet cherry fruit increased anthocyanin accumulation and induced ABA production and that ABA participates in light-modulated anthocyanin accumulation in bicolored sweet cherry. Two B-box (BBX) genes, PavBBX6/9, were highly induced by light and ABA treatments, as was anthocyanin accumulation. The ectopic expression of PavBBX6 or PavBBX9 in Arabidopsis (Arabidopsis thaliana) increased anthocyanin biosynthesis and ABA accumulation. Overexpressing PavBBX6 or PavBBX9 in sweet cherry calli also enhanced light-induced anthocyanin biosynthesis and ABA accumulation. Additionally, transient overexpression of PavBBX6 or PavBBX9 in sweet cherry peel increased anthocyanin and ABA contents, whereas silencing either gene had the opposite effects. PavBBX6 and PavBBX9 directly bound to the G-box elements in the promoter of UDP glucose-flavonoid-3-O-glycosyltransferase (PavUFGT), a key gene for anthocyanin biosynthesis, and 9-cis-epoxycarotenoid dioxygenase 1 (PavNCED1), a key gene for ABA biosynthesis, and enhanced their activities. These results suggest that PavBBX6 and PavBBX9 positively regulate light-induced anthocyanin and ABA biosynthesis by promoting PavUFGT and PavNCED1 expression, respectively. Our study provides insights into the relationship between the light-induced ABA biosynthetic pathway and anthocyanin accumulation in bicolored sweet cherry fruit.
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Affiliation(s)
- Yanyan Wang
- Department of Pomology, College of Horticulture, China Agricultural University, Beijing, 100193, China
| | - Yuqin Xiao
- Department of Pomology, College of Horticulture, China Agricultural University, Beijing, 100193, China
| | - Yueting Sun
- Department of Pomology, College of Horticulture, China Agricultural University, Beijing, 100193, China
| | - Xiang Zhang
- Department of Pomology, College of Horticulture, China Agricultural University, Beijing, 100193, China
| | - Bingyang Du
- Department of Pomology, College of Horticulture, China Agricultural University, Beijing, 100193, China
| | - Maihemuti Turupu
- Department of Pomology, College of Horticulture, China Agricultural University, Beijing, 100193, China
| | - Qisheng Yao
- Department of Pomology, College of Horticulture, China Agricultural University, Beijing, 100193, China
| | - Shilin Gai
- Department of Pomology, College of Horticulture, China Agricultural University, Beijing, 100193, China
| | - Shi Tong
- Department of Pomology, College of Horticulture, China Agricultural University, Beijing, 100193, China
| | - Jing Huang
- Department of Pomology, College of Horticulture, China Agricultural University, Beijing, 100193, China
| | - Tianhong Li
- Department of Pomology, College of Horticulture, China Agricultural University, Beijing, 100193, China
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24
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Wang D, Chen L, Yang Y, Abbas F, Qin Y, Lu H, Lai B, Wu Z, Hu B, Qin Y, Wang H, Zhao J, Hu G. Integrated metabolome and transcriptome analysis reveals the cause of anthocyanin biosynthesis deficiency in litchi aril. PHYSIOLOGIA PLANTARUM 2023; 175:e13860. [PMID: 36683140 DOI: 10.1111/ppl.13860] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2022] [Revised: 01/04/2023] [Accepted: 01/18/2023] [Indexed: 06/17/2023]
Abstract
Anthocyanins are health-promoting compounds with strong antioxidant properties that play important roles in disease prevention. Litchi chinensis Sonn. is a well-known and economically significant fruit due to its appealing appearance and nutritional value. The mature pericarp of litchi is rich in anthocyanins, whereas the aril (flesh) has an extremely low anthocyanin content. However, the mechanism of anthocyanin differential accumulation in litchi pericarp and aril remained unknown. Here, metabolome and transcriptome analysis were performed to unveil the cause of the deficiency of anthocyanin biosynthesis in litchi aril. Numerous anthocyanin biosynthesis-related metabolites and their derivatives were found in the aril, and the levels of rutin and (-)-epicatechin in the aril were comparable to those found in the pericarp, while anthocyanin levels were negligible. This suggests that the biosynthetic pathway from phenylalanine to cyanidin was present but that a block in cyanidin glycosylation could result in extremely low anthocyanin accumulation in the aril. Furthermore, 54 candidate genes were screened using weighted gene co-expression network analysis (WGCNA), and 9 genes (LcUFGT1, LcGST1, LcMYB1, LcSGR, LcCYP75B1, LcMATE, LcTPP, LcSWEET10, and LcERF61) might play a significant role in regulating anthocyanin biosynthesis. The dual-luciferase reporter (DLR) assay revealed that LcMYB1 strongly activated the promoters of LcUFGT1, LcGST4, and LcSWEET10. The results imply that LcMYB1 is the primary qualitative gene responsible for the deficiency of anthocyanin biosynthesis in litchi aril, which was confirmed by a transient transformation assay. Our findings shed light on the molecular mechanisms underlying tissue-specific anthocyanin accumulation and will help developing new red-fleshed litchi germplasm.
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Affiliation(s)
- Dan Wang
- State Key Laboratory for Conservation and Utilization of Subtropical Agrobio-resources/Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (South China), Ministry of Agriculture and Rural Affairs/Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, Guangzhou, China
| | - Lei Chen
- State Key Laboratory for Conservation and Utilization of Subtropical Agrobio-resources/Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (South China), Ministry of Agriculture and Rural Affairs/Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, Guangzhou, China
| | - Yabing Yang
- State Key Laboratory for Conservation and Utilization of Subtropical Agrobio-resources/Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (South China), Ministry of Agriculture and Rural Affairs/Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, Guangzhou, China
| | - Farhat Abbas
- State Key Laboratory for Conservation and Utilization of Subtropical Agrobio-resources/Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (South China), Ministry of Agriculture and Rural Affairs/Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, Guangzhou, China
| | - Yaqi Qin
- State Key Laboratory for Conservation and Utilization of Subtropical Agrobio-resources/Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (South China), Ministry of Agriculture and Rural Affairs/Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, Guangzhou, China
| | - Hanle Lu
- State Key Laboratory for Conservation and Utilization of Subtropical Agrobio-resources/Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (South China), Ministry of Agriculture and Rural Affairs/Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, Guangzhou, China
| | - Biao Lai
- School of Advanced Agriculture and Bioengineering, Yangtze Normal University, Fuling, China
| | - Zichen Wu
- State Key Laboratory for Conservation and Utilization of Subtropical Agrobio-resources/Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (South China), Ministry of Agriculture and Rural Affairs/Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, Guangzhou, China
| | - Bing Hu
- Key Laboratory of Tropical Forestry Research, National Forestry and Grassland Administration, Research Institute of Tropical Forestry, Chinese Academy of Forestry, Guangzhou, Guangdong, China
| | - Yonghua Qin
- State Key Laboratory for Conservation and Utilization of Subtropical Agrobio-resources/Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (South China), Ministry of Agriculture and Rural Affairs/Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, Guangzhou, China
| | - Huicong Wang
- State Key Laboratory for Conservation and Utilization of Subtropical Agrobio-resources/Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (South China), Ministry of Agriculture and Rural Affairs/Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, Guangzhou, China
| | - Jietang Zhao
- State Key Laboratory for Conservation and Utilization of Subtropical Agrobio-resources/Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (South China), Ministry of Agriculture and Rural Affairs/Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, Guangzhou, China
| | - Guibing Hu
- State Key Laboratory for Conservation and Utilization of Subtropical Agrobio-resources/Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (South China), Ministry of Agriculture and Rural Affairs/Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, Guangzhou, China
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25
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Zheng Q, Takei-Hoshi R, Okumura H, Ito M, Kawaguchi K, Otagaki S, Matsumoto S, Luo Z, Zhang Q, Shiratake K. Genome editing of SlMYB3R3, a cell cycle transcription factor gene of tomato, induces elongated fruit shape. JOURNAL OF EXPERIMENTAL BOTANY 2022; 73:7312-7325. [PMID: 36070755 PMCID: PMC9730800 DOI: 10.1093/jxb/erac352] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Accepted: 09/05/2022] [Indexed: 06/15/2023]
Abstract
Fruit shape is an important trait that attracts consumers, and the regulation of genes related to cell division is crucial for shaping multicellular organs. In Arabidopsis, MYB3R transcription factors, which harbor three imperfect repeats in the N-terminus, control organ growth by regulating cell division. However, the function of MYB3Rs in tomato remains unknown. Here, we characterized tomato SlMYB3R3, which was preferentially expressed in flowers and placed in a subclade with two Arabidopsis cell cycle suppressors (MYB3R3/5). slmyb3r3 knockout mutants were generated using the CRISPR/Cas9 system. Morphological observation of the slmyb3r3 mutants showed that fruits that were elongated and occasionally peanut-like in shape were formed, which was caused by significantly increased cell numbers in the longitudinal direction. Transcriptome and yeast one-hybrid assay results suggested that SlMYB3R3 acted as a suppressor of cell-cycle-related genes by binding to the mitosis-specific activator (MSA) motifs in their promoters. Taken together, knock out of the suppressor SlMYB3R3 leads to elongated fruit, which results from the altered cell division pattern at the ovary stage, by regulating cell-cycle-related genes in an MSA-dependent manner. Our results suggest that SlMYB3R3 and its orthologs have the potential to change fruit shape as part of the molecular breeding of fruit crops.
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Affiliation(s)
- Qingyou Zheng
- Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya 464-8601, Japan
- Key Laboratory of Horticultural Plant Biology, Huazhong Agricultural University, Wuhan 430070, China
| | - Rie Takei-Hoshi
- Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya 464-8601, Japan
| | - Hitomi Okumura
- Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya 464-8601, Japan
| | - Masaki Ito
- School of Biological Science and Technology, College of Science and Engineering, Kanazawa University, Kanazawa 920-1192, Japan
| | - Kohei Kawaguchi
- Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya 464-8601, Japan
| | - Shungo Otagaki
- Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya 464-8601, Japan
| | - Shogo Matsumoto
- Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya 464-8601, Japan
| | - Zhengrong Luo
- Key Laboratory of Horticultural Plant Biology, Huazhong Agricultural University, Wuhan 430070, China
| | - Qinglin Zhang
- Key Laboratory of Horticultural Plant Biology, Huazhong Agricultural University, Wuhan 430070, China
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Pratyusha DS, Sarada DVL. MYB transcription factors-master regulators of phenylpropanoid biosynthesis and diverse developmental and stress responses. PLANT CELL REPORTS 2022; 41:2245-2260. [PMID: 36171500 DOI: 10.1007/s00299-022-02927-1] [Citation(s) in RCA: 36] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2022] [Accepted: 09/16/2022] [Indexed: 06/16/2023]
Abstract
Phenylpropanoids, the largest class of natural products including flavonoids, anthocyanins, monolignols and tannins perform multiple functions ranging from photosynthesis, nutrient uptake, regulating growth, cell division, maintenance of redox homeostasis and biotic and abiotic stress responses. Being sedentary life forms, plants possess several regulatory modules that increase their performance in varying environments by facilitating activation of several signaling cascades upon perception of developmental and stress signals. Of the various regulatory modules, those involving MYB transcription factors are one of the extensive groups involved in regulating the phenylpropanoid metabolic enzymes in addition to other genes. R2R3 MYB transcription factors are a class of plant-specific transcription factors that regulate the expression of structural genes involved in anthocyanin, flavonoid and monolignol biosynthesis which are indispensable to several developmental pathways and stress responses. The aim of this review is to present the regulation of the phenylpropanoid pathway by MYB transcription factors via Phospholipase D/phosphatidic acid signaling, downstream activation of the structural genes, leading to developmental and/or stress responses. Specific MYB transcription factors inducing or repressing specific structural genes of anthocyanin, flavonoid and lignin biosynthetic pathways are discussed. Further the roles of MYB in activating biotic and abiotic stress responses are delineated. While several articles have reported the role of MYB's in stress responses, they are restricted to two or three specific MYB factors. This review is a consolidation of the diverse roles of different MYB transcription factors involved both in induction and repression of anthocyanin, flavonoid, and lignin biosynthesis.
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Affiliation(s)
- Durvasula Sumana Pratyusha
- Department of Biotechnology, School of Bioengineering, SRM Institute of Science and Technology, Kattankulathur, Tamil Nadu, 603 203, India
| | - Dronamraju V L Sarada
- Department of Biotechnology, School of Bioengineering, SRM Institute of Science and Technology, Kattankulathur, Tamil Nadu, 603 203, India.
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Zhang L, Tao R, Wang S, Gao Y, Wang L, Yang S, Zhang X, Yu W, Wu X, Li K, Ni J, Teng Y, Bai S. PpZAT5 suppresses the expression of a B-box gene PpBBX18 to inhibit anthocyanin biosynthesis in the fruit peel of red pear. FRONTIERS IN PLANT SCIENCE 2022; 13:1022034. [PMID: 36304405 PMCID: PMC9592862 DOI: 10.3389/fpls.2022.1022034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Accepted: 09/13/2022] [Indexed: 06/16/2023]
Abstract
BBX (B-box) proteins play a vital role in light-induced anthocyanin biosynthesis. PpBBX18 was an indispensable regulator for the induction of anthocyanin biosynthesis in the peel of red pear fruit (Pyrus pyrifolia Nakai.). However, the upstream regulation of BBX genes has not been well characterized. In this study, PpZAT5, a cysteine2/histidine2-type transcription factor, was discovered as the upstream negative regulator of PpBBX18. The results showed that PpZAT5 functions as a transcriptional repressor and directly binds to the CAAT motif of PpBBX18 and inhibits its expression. PpZAT5 expression was inhibited by light, which is converse to the expression pattern of anthocyanin-related structural genes. In addition, less anthocyanin accumulated in the PpZAT5-overexpressing pear calli than in the wild-type pear calli; on the contrary, more anthocyanin accumulated in PpZAT5-RNAi pear calli. Moreover, the crucial genes involved in light-induced anthocyanin biosynthesis were markedly down-regulated in the transcriptome of PpZAT5 overexpression pear calli compared to wild-type. In conclusion, our study indicates that PpBBX18 is negatively regulated by a C2H2-type transcriptional repressor, PpZAT5, which reduces anthocyanin content in pear. The present results demonstrate an upstream molecular mechanism of PpBBX18 and provide insights into light-induced anthocyanin biosynthesis.
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Affiliation(s)
- Lu Zhang
- Department of Horticulture, Zhejiang University, Hangzhou, China
- Zhejiang Provincial Key Laboratory of Integrative Biology of Horticultural Plants, Zhejiang University, Hangzhou, China
- The Key Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Ministry of Agriculture of China, Hangzhou, China
| | - Ruiyan Tao
- Department of Horticulture, Zhejiang University, Hangzhou, China
- Zhejiang Provincial Key Laboratory of Integrative Biology of Horticultural Plants, Zhejiang University, Hangzhou, China
- The Key Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Ministry of Agriculture of China, Hangzhou, China
| | - Simai Wang
- Department of Horticulture, Zhejiang University, Hangzhou, China
- Zhejiang Provincial Key Laboratory of Integrative Biology of Horticultural Plants, Zhejiang University, Hangzhou, China
- The Key Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Ministry of Agriculture of China, Hangzhou, China
| | - Yuhao Gao
- Department of Horticulture, Zhejiang University, Hangzhou, China
- Zhejiang Provincial Key Laboratory of Integrative Biology of Horticultural Plants, Zhejiang University, Hangzhou, China
- The Key Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Ministry of Agriculture of China, Hangzhou, China
| | - Lu Wang
- Department of Horticulture, Zhejiang University, Hangzhou, China
- Zhejiang Provincial Key Laboratory of Integrative Biology of Horticultural Plants, Zhejiang University, Hangzhou, China
- The Key Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Ministry of Agriculture of China, Hangzhou, China
| | - Shulin Yang
- Department of Horticulture, Zhejiang University, Hangzhou, China
- Zhejiang Provincial Key Laboratory of Integrative Biology of Horticultural Plants, Zhejiang University, Hangzhou, China
- The Key Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Ministry of Agriculture of China, Hangzhou, China
| | - Xiao Zhang
- Department of Horticulture, Zhejiang University, Hangzhou, China
- Zhejiang Provincial Key Laboratory of Integrative Biology of Horticultural Plants, Zhejiang University, Hangzhou, China
- The Key Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Ministry of Agriculture of China, Hangzhou, China
| | - Wenjie Yu
- Department of Horticulture, Zhejiang University, Hangzhou, China
- Zhejiang Provincial Key Laboratory of Integrative Biology of Horticultural Plants, Zhejiang University, Hangzhou, China
- The Key Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Ministry of Agriculture of China, Hangzhou, China
| | - Xinyue Wu
- Department of Horticulture, Zhejiang University, Hangzhou, China
- Zhejiang Provincial Key Laboratory of Integrative Biology of Horticultural Plants, Zhejiang University, Hangzhou, China
- The Key Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Ministry of Agriculture of China, Hangzhou, China
| | - Kunfeng Li
- Agricultural Experiment Station, Zhejiang University, Hangzhou, China
| | - Junbei Ni
- Department of Horticulture, Zhejiang University, Hangzhou, China
- Zhejiang Provincial Key Laboratory of Integrative Biology of Horticultural Plants, Zhejiang University, Hangzhou, China
- The Key Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Ministry of Agriculture of China, Hangzhou, China
| | - Yuanwen Teng
- Department of Horticulture, Zhejiang University, Hangzhou, China
- Zhejiang Provincial Key Laboratory of Integrative Biology of Horticultural Plants, Zhejiang University, Hangzhou, China
- The Key Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Ministry of Agriculture of China, Hangzhou, China
| | - Songling Bai
- Department of Horticulture, Zhejiang University, Hangzhou, China
- Zhejiang Provincial Key Laboratory of Integrative Biology of Horticultural Plants, Zhejiang University, Hangzhou, China
- The Key Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Ministry of Agriculture of China, Hangzhou, China
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Alabd A, Ahmad M, Zhang X, Gao Y, Peng L, Zhang L, Ni J, Bai S, Teng Y. Light-responsive transcription factor PpWRKY44 induces anthocyanin accumulation by regulating PpMYB10 expression in pear. HORTICULTURE RESEARCH 2022; 9:uhac199. [PMID: 37180030 PMCID: PMC10167416 DOI: 10.1093/hr/uhac199] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Accepted: 08/31/2022] [Indexed: 05/15/2023]
Abstract
Anthocyanins are a valuable source of antioxidants in the human diet and contribute to fruit coloration. In red-skinned pears, anthocyanin biosynthesis can be induced by light, in which the MYB-bHLH-WDR complex plays a critically important role in transcriptional regulation. However, knowledge of WRKY-mediated transcriptional regulation of light-induced anthocyanin biosynthesis is scarce in red pears. This work identified and functionally characterized a light-inducing WRKY transcription factor, PpWRKY44, in pear. Functional analysis based on overexpressed pear calli showed that PpWRKY44 promoted anthocyanin accumulation. Also, transiently overexpressed PpWRKY44 in pear leaves and fruit peels significantly enhanced the accumulation of anthocyanin, whereas silencing PpWRKY44 in pear fruit peels impaired induction of the accumulation of anthocyanin by light. By chromatin immunoprecipitation and electrophoretic mobility shift assay coupled to a quantitative polymerase chain reaction, we found that PpWRKY44 bound in vivo and in vitro to the PpMYB10 promoter, revealing it as a direct downstream target gene. Moreover, PpWRKY44 was activated by PpBBX18, a light signal transduction pathway component. Our results explained the mechanism mediating the impacts of PpWRKY44 on the transcriptional regulation of anthocyanin accumulation, with potential implications for fine-tuning the fruit peel coloration triggered by light in red pears.
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Affiliation(s)
- Ahmed Alabd
- College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, Zhejiang 310058, China
- Department of Pomology, Faculty of Agriculture, Alexandria University, Alexandria 21545, Egypt
| | - Mudassar Ahmad
- College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Xiao Zhang
- College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Yuhao Gao
- College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Lin Peng
- College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Lu Zhang
- College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Junbei Ni
- College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Songling Bai
- College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Yuanwen Teng
- College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, Zhejiang 310058, China
- Hainan Institute of Zhejiang University, Sanya, Hainan 572025, China
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Kang H, Zhang TT, Li YY, Lin-Wang K, Espley RV, Du YP, Guan QM, Ma FW, Hao YJ, You CX, Wang XF. The apple BTB protein MdBT2 positively regulates MdCOP1 abundance to repress anthocyanin biosynthesis. PLANT PHYSIOLOGY 2022; 190:305-318. [PMID: 35674376 PMCID: PMC9434159 DOI: 10.1093/plphys/kiac279] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Accepted: 05/11/2022] [Indexed: 05/27/2023]
Abstract
The ubiquitin ligase CONSTITUTIVELY PHOTOMORPHOGENIC 1 (COP1) plays a central role in light-induced anthocyanin biosynthesis. However, the upstream regulatory factors of COP1 remain poorly understood, particularly in horticultural plants. Here, we identified an MdCOP1-interacting protein, BROAD-COMPLEX, TRAMTRACK AND BRIC A BRAC2 (MdBT2), in apple (Malus domestica). MdBT2 is a BTB protein that directly interacts with and stabilizes MdCOP1 by inhibiting self-ubiquitination. Fluorescence observation and cell fractionation assays showed that MdBT2 increased the abundance of MdCOP1 in the nucleus. Moreover, a series of phenotypic analyses indicated that MdBT2 promoted MdCOP1-mediated ubiquitination and degradation of the MdMYB1 transcription factor, inhibiting the expression of anthocyanin biosynthesis genes and anthocyanin accumulation. Overall, our findings reveal a molecular mechanism by which MdBT2 positively regulates MdCOP1, providing insight into MdCOP1-mediated anthocyanin biosynthesis.
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Affiliation(s)
- Hui Kang
- State Key Laboratory of Crop Biology, Shandong Collaborative Innovation Center for Fruit and Vegetable Production with High Quality and Efficiency, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai-An, Shandong 271018, China
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yang-Ling, Shaanxi 712100, China
| | - Ting-Ting Zhang
- State Key Laboratory of Crop Biology, Shandong Collaborative Innovation Center for Fruit and Vegetable Production with High Quality and Efficiency, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai-An, Shandong 271018, China
| | - Yuan-Yuan Li
- State Key Laboratory of Crop Biology, Shandong Collaborative Innovation Center for Fruit and Vegetable Production with High Quality and Efficiency, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai-An, Shandong 271018, China
| | - Kui Lin-Wang
- The New Zealand Institute for Plant and Food Research Limited, Mt. Albert, Auckland 92169, New Zealand
| | - Richard V Espley
- The New Zealand Institute for Plant and Food Research Limited, Mt. Albert, Auckland 92169, New Zealand
| | - Yuan-Peng Du
- State Key Laboratory of Crop Biology, Shandong Collaborative Innovation Center for Fruit and Vegetable Production with High Quality and Efficiency, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai-An, Shandong 271018, China
| | - Qing-Mei Guan
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yang-Ling, Shaanxi 712100, China
| | - Feng-Wang Ma
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yang-Ling, Shaanxi 712100, China
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Zhao L, Sun J, Cai Y, Yang Q, Zhang Y, Ogutu CO, Liu J, Zhao Y, Wang F, He H, Zheng B, Han Y. PpHYH is responsible for light-induced anthocyanin accumulation in fruit peel of Prunus persica. TREE PHYSIOLOGY 2022; 42:1662-1677. [PMID: 35220436 PMCID: PMC9366866 DOI: 10.1093/treephys/tpac025] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2021] [Accepted: 02/18/2022] [Indexed: 05/29/2023]
Abstract
Peach Prunus persica is an economically important fruit tree crop worldwide. Although the external color of fruit is an important aspect of fruit quality, the mechanisms underlying its formation remain elusive in peach. Here, we report an elongated hypocotyl 5-homolog gene PpHYH involved in the regulation of anthocyanin pigmentation in peach fruit peel. Anthocyanin accumulation in fruit peel is light-dependent in peach. PpHYH had no auto-activation activity and its transcription was induced by sunlight. PpHYH activated transcription of a cluster of three PpMYB10 genes in the present of a cofactor PpBBX4 encoding a B-BOX protein, leading to anthocyanin accumulation in the sun-exposed peel. However, the PpHYH activity was repressed by a negative regulator of PpCOP1 encoding constitutive photomorphogenesis protein 1 which accumulated in the nucleus under dark condition, resulting in failure of anthocyanin accumulation in the shaded peel. PpCOP1 was re-localized into the cytosol under light condition, in accordance with fruit peel pigmentation. Additionally, transport of anthocyanins from the cytoplasm to the vacuole was a rate-limiting step for anthocyanin accumulation in peach fruit peel. Our results reveal for the first time the HYH gene involved in the regulation of anthocyanin accumulation in fruits, and provide target genes for genetic manipulation of fruit coloration.
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Affiliation(s)
- Lei Zhao
- CAS Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, The Innovative Academy of Seed Design of Chinese Academy of Sciences, Wuhan Botanical Garden, Wuhan 430074, China
- University of Chinese Academy of Sciences, 19A Yuquanlu, Beijing 100049, China
| | - Juanli Sun
- CAS Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, The Innovative Academy of Seed Design of Chinese Academy of Sciences, Wuhan Botanical Garden, Wuhan 430074, China
- University of Chinese Academy of Sciences, 19A Yuquanlu, Beijing 100049, China
| | - Yaming Cai
- CAS Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, The Innovative Academy of Seed Design of Chinese Academy of Sciences, Wuhan Botanical Garden, Wuhan 430074, China
- University of Chinese Academy of Sciences, 19A Yuquanlu, Beijing 100049, China
| | - Qiurui Yang
- CAS Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, The Innovative Academy of Seed Design of Chinese Academy of Sciences, Wuhan Botanical Garden, Wuhan 430074, China
- University of Chinese Academy of Sciences, 19A Yuquanlu, Beijing 100049, China
| | - Yuanqiang Zhang
- CAS Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, The Innovative Academy of Seed Design of Chinese Academy of Sciences, Wuhan Botanical Garden, Wuhan 430074, China
- University of Chinese Academy of Sciences, 19A Yuquanlu, Beijing 100049, China
| | - Collins Otieno Ogutu
- CAS Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, The Innovative Academy of Seed Design of Chinese Academy of Sciences, Wuhan Botanical Garden, Wuhan 430074, China
| | - Jingjing Liu
- CAS Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, The Innovative Academy of Seed Design of Chinese Academy of Sciences, Wuhan Botanical Garden, Wuhan 430074, China
- University of Chinese Academy of Sciences, 19A Yuquanlu, Beijing 100049, China
| | - Yun Zhao
- CAS Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, The Innovative Academy of Seed Design of Chinese Academy of Sciences, Wuhan Botanical Garden, Wuhan 430074, China
- Hubei Hongshan Laboratory, Wuhan, Hubei 430070, China
| | - Furong Wang
- Institute of Fruit Tree and Tea, Academy of Agricultural Science, Wuhan, Hubei 430209, China
| | - Huaping He
- Institute of Fruit Tree and Tea, Academy of Agricultural Science, Wuhan, Hubei 430209, China
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Ge W, Luo M, Sun H, Wei B, Zhou X, Zhou Q, Ji S. The CaMYB340 transcription factor induces chilling injury in post-harvest bell pepper by inhibiting fatty acid desaturation. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2022; 111:800-818. [PMID: 35653257 DOI: 10.1111/tpj.15854] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Revised: 05/19/2022] [Accepted: 05/30/2022] [Indexed: 06/15/2023]
Abstract
Bell pepper (Capsicum annuum L.) is a tradable and desirable crop; however, its perishable nature requires low-temperature handling. Paradoxically, cold causes chilling injury (CI) and post-harvest waste. Current knowledge about CI in pepper is limited. The mechanism of CI is multi-faceted; therefore, we focused on fatty acid (FA) desaturation. We identified an upstream nuclear transcription factor (TF), CaMYB340, belonging to the R2R3 MYB subfamily, that negatively regulates FA desaturation and CaCBF3 expression and whose gene and protein expression is induced by low temperature (4°C). Specifically, McrBC treatment and bisulfite sequencing PCR indicate that exposure to cold triggers DNA methylation on one of the CHH sites in the CaMYB340 promoter. This epigenetic event at least partly contributes to the upregulation of CaMYB340 transcript levels. Increased expression of CaMYB340 results in the formation of protein complexes with CabHLH93 and CaMYB1R1, which in turn downregulate the expression of downstream genes. For peppers held at low temperature, transient overexpression of CaMYB340 reduced unsaturated FA content and membrane fluidity, resulting in cold-induced poor peel texture. Transient CaMYB340 silencing increased FA desaturation and lowered electrolyte leakage, enhancing cold tolerance in CaMYB340 knockdown fruits. Overall, these results underscore the intricacy of transcriptional networks in plants and highlight the role of CaMYB340 in CI occurrence in pepper fruits.
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Affiliation(s)
- Wanying Ge
- College of Food, Shenyang Agricultural University, Shenyang, 110866, China
| | - Manli Luo
- College of Food, Shenyang Agricultural University, Shenyang, 110866, China
| | - Huajun Sun
- College of Food, Shenyang Agricultural University, Shenyang, 110866, China
| | - Baodong Wei
- College of Food, Shenyang Agricultural University, Shenyang, 110866, China
| | - Xin Zhou
- College of Food, Shenyang Agricultural University, Shenyang, 110866, China
| | - Qian Zhou
- College of Food, Shenyang Agricultural University, Shenyang, 110866, China
| | - Shujuan Ji
- College of Food, Shenyang Agricultural University, Shenyang, 110866, China
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Lin Y, Laosatit K, Liu J, Chen J, Yuan X, Somta P, Chen X. The mungbean VrP locus encoding MYB90, an R2R3-type MYB protein, regulates anthocyanin biosynthesis. FRONTIERS IN PLANT SCIENCE 2022; 13:895634. [PMID: 35937322 PMCID: PMC9355716 DOI: 10.3389/fpls.2022.895634] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Accepted: 06/27/2022] [Indexed: 05/30/2023]
Abstract
Anthocyanins are water-soluble pigments present in several tissues/parts of plants. The pigments provide color and are wildly known for health benefits for human, insect attraction for plant pollination, and stress resistance in plants. Anthocyanin content variations in mungbean [Vigna radiata (L.) Wilczek] were first noticed a long time ago, but the genetic mechanism controlling the anthocyanins in mungbean remains unknown. An F2 population derived from the cross between purple-hypocotyl (V2709) and green-hypocotyl (Sulv1) mungbeans was used to map the VrP locus controlling purple hypocotyl. The VrP locus was mapped to a 78.9-kb region on chromosome 4. Sequence comparison and gene expression analysis identified an R2R3-MYB gene VrMYB90 as the candidate gene for the VrP locus. Haplotype analysis using 124 mungbean accessions suggested that 10 single nucleotide polymorphisms (SNPs) in exon 3 may lead to an abolished expression of VrMYB90 and an absence of anthocyanin accumulation in the hypocotyl of Sulv1 and KPS2. The overexpression of VrMYB90 in mungbean hairy root, tobacco leaf, and Arabidopsis resulted in anthocyanin accumulation (purple color). Gene expression analysis demonstrated that VrMYB90 regulated anthocyanin accumulation in the hypocotyl, stem, petiole, and flowers, and the expression was sensitive to light. VrMYB90 protein may upregulate VrDFR encoding dihydroflavonol 4-reductase at the late biosynthesis step of anthocyanins in mungbeans. These results suggest that VrMYB90 is the dominator in the spatiotemporal regulation of anthocyanin biosynthesis. Our results provide insight into the biosynthesis mechanism of anthocyanin and a theoretical basis for breeding mungbeans.
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Affiliation(s)
- Yun Lin
- Jiangsu Key Laboratory for Horticultural Crop Genetic Improvement, Institute of Industrial Crops, Jiangsu Academy of Agricultural Sciences, Nanjing, China
| | - Kularb Laosatit
- Department of Agronomy, Faculty of Agriculture at Kamphaeng Saen, Kasetsart University, Kamphaeng Saen, Thailand
| | - Jinyang Liu
- Jiangsu Key Laboratory for Horticultural Crop Genetic Improvement, Institute of Industrial Crops, Jiangsu Academy of Agricultural Sciences, Nanjing, China
| | - Jingbing Chen
- Jiangsu Key Laboratory for Horticultural Crop Genetic Improvement, Institute of Industrial Crops, Jiangsu Academy of Agricultural Sciences, Nanjing, China
| | - Xingxing Yuan
- Jiangsu Key Laboratory for Horticultural Crop Genetic Improvement, Institute of Industrial Crops, Jiangsu Academy of Agricultural Sciences, Nanjing, China
| | - Prakit Somta
- Department of Agronomy, Faculty of Agriculture at Kamphaeng Saen, Kasetsart University, Kamphaeng Saen, Thailand
| | - Xin Chen
- Jiangsu Key Laboratory for Horticultural Crop Genetic Improvement, Institute of Industrial Crops, Jiangsu Academy of Agricultural Sciences, Nanjing, China
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33
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Byun J, Kim TG, Lee JH, Li N, Jung S, Kang BC. Identification of CaAN3 as a fruit-specific regulator of anthocyanin biosynthesis in pepper (Capsicum annuum). TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 2022; 135:2197-2211. [PMID: 35536305 DOI: 10.1007/s00122-022-04106-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Accepted: 04/12/2022] [Indexed: 06/14/2023]
Abstract
The novel gene CaAN3 encodes an R2R3 MYB transcription factor that regulates fruit-specific anthocyanin accumulation. The key regulatory gene CaAN2 encodes an R2R3 MYB transcription factor that regulates anthocyanin biosynthesis in various tissues in pepper (Capsicum annuum). However, CaAN2 is not expressed in certain pepper accessions showing fruit-specific anthocyanin accumulation. In this study, we identified the novel locus CaAN3 as a regulator of fruit-specific anthocyanin biosynthesis, using an F2 population derived from a hybrid cultivar with purple immature fruits and segregating for CaAN3. We extracted total RNA, assembled two RNA pools according to fruit color, and carried out bulked segregant RNA sequencing. We aligned the raw reads to the pepper reference genome Dempsey and identified 6,672 significant single nucleotide polymorphisms (SNPs) by calculating the Δ(SNP-index) between the two pools. We then conducted molecular mapping to delimit the target region of CaAN3 to the interval 184.6-186.4 Mbp on chromosome 10. We focused on Dem.v1.00043895, encoding an R2R3 MYB transcription factor, as the strongest candidate gene. Sequence analysis revealed four insertion/deletion polymorphisms in the promoter region of the green CaAN3 allele. We employed virus-induced gene silencing and transient overexpression assays to characterize the function of the candidate gene. When Dem.v1.00043895 was silenced in pepper, anthocyanin accumulation decreased in the pericarp, while the transient overexpression of Dem.v1.00043895 in Nicotiana benthamiana leaves resulted in the accumulation of anthocyanins around the infiltration sites. These results showed that Dem.v1.00043895 is CaAN3, an activator of anthocyanin biosynthesis in pepper fruits.
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Affiliation(s)
- Jinyoung Byun
- Department of Agriculture, Forestry, and Bioresources, Plant Genomics Breeding Institute, College of Agriculture and Life Sciences, Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, South Korea
| | - Tae-Gun Kim
- Department of Agriculture, Forestry, and Bioresources, Plant Genomics Breeding Institute, College of Agriculture and Life Sciences, Interdisciplinary Program in Agricultural GenomicsResearch Institute of Agriculture and Life SciencesSeoul National University, Seoul, South Korea
| | - Joung-Ho Lee
- Department of Agriculture, Forestry, and Bioresources, Plant Genomics Breeding Institute, College of Agriculture and Life Sciences, Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, South Korea
| | - Ning Li
- Cash Crops Research Institute, Hubei Academy of Agricultural Sciences, Wuhan City, 430064, Hubei Province, China
| | - Soyoung Jung
- Department of Agriculture, Forestry, and Bioresources, Plant Genomics Breeding Institute, College of Agriculture and Life Sciences, Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, South Korea
| | - Byoung-Cheorl Kang
- Department of Agriculture, Forestry, and Bioresources, Plant Genomics Breeding Institute, College of Agriculture and Life Sciences, Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, South Korea.
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34
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Jin Z, Jiang W, Luo Y, Huang H, Yi D, Pang Y. Analyses on Flavonoids and Transcriptome Reveals Key MYB Gene for Proanthocyanidins Regulation in Onobrychis Viciifolia. FRONTIERS IN PLANT SCIENCE 2022; 13:941918. [PMID: 35812930 PMCID: PMC9263696 DOI: 10.3389/fpls.2022.941918] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Accepted: 05/30/2022] [Indexed: 05/31/2023]
Abstract
Onobrychis viciifolia (sainfoin) is one of the most high-quality legume forages, which is rich in proanthocyanidins that is beneficial for the health and production of animals. In this study, proanthocyanidins and total flavonoids in leaves of 46 different sainfoin germplasm resources were evaluated, and it showed that soluble proanthocyanidin contents varied greatly in these sainfoin germplasm resources, but total flavonoids did not show significant difference. Transcriptome sequencing with high and low proanthocyanidins sainfoin resulted in the identification of totally 52,926 unigenes in sainfoin, and they were classed into different GOC categories. Among them, 1,608 unigenes were differentially expressed in high and low proanthocyanidins sainfoin samples, including 1,160 genes that were upregulated and 448 genes that were downregulated. Analysis on gene enrichment via KEGG annotation revealed that the differentially expressed genes were mainly enriched in the phenylpropanoid biosynthetic pathway and the secondary metabolism pathway. We also analyzed the expression levels of structural genes of the proanthocyanidin/flavonoid pathway in roots, stems, and leaves in the high proanthocyanidin sainfoin via RT-qPCR and found that these genes were differentially expressed in these tissues. Among them, the expression levels of F3'5'H and ANR were higher in leaves than in roots or stems, which is consistent with proanthocyanidins content in these tissues. Among MYB genes that were differentially expressed, the expression of OvMYBPA2 was relatively high in high proanthocyanidin sainfoin. Over-expression level of OvMYBPA2 in alfalfa hairy roots resulted in decreased anthocyanin content but increased proanthocyanidin content. Our study provided transcriptome information for further functional characterization of proanthocyanidin biosynthesis-related genes in sainfoin and candidate key MYB genes for bioengineering of proanthocyanidins in plants.
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Combined Transcriptome and Metabolome Analyses Reveal Candidate Genes Involved in Tangor ( Citrus reticulata × Citrus sinensis) Fruit Development and Quality Formation. Int J Mol Sci 2022; 23:ijms23105457. [PMID: 35628266 PMCID: PMC9141862 DOI: 10.3390/ijms23105457] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Revised: 04/29/2022] [Accepted: 05/11/2022] [Indexed: 02/06/2023] Open
Abstract
Tangor, an important citrus type, is a hybrid of orange and mandarin and possesses their advantageous characteristics. Fruit quality is an important factor limiting the development of the citrus industry and highly depends on fruit development and ripening programs. However, fruit development and quality formation have not been completely explored in mandarin-orange hybrids. We sequenced the metabolome and transcriptome of three mandarin-orange hybrid cultivars at the early fruiting [90 days after full bloom (DAFB)], color change (180 DAFB), and ripening (270 DAFB) stages. Metabolome sequencing was performed to preliminarily identify the accumulation patterns of primary and secondary metabolites related to fruit quality and hormones regulating fruit development. Transcriptome analysis showed that many genes related to primary metabolism, secondary metabolism, cell wall metabolism, phytohormones, and transcriptional regulation were up-regulated in all three cultivars during fruit development and ripening. Additionally, multiple key genes were identified that may play a role in sucrose, citric acid and flavonoid accumulation, cell wall modification, and abscisic acid signaling, which may provide a valuable resource for future research on enhancement of fruit quality of hybrid citrus. Overall, this study provides new insights into the molecular basis of pulp growth and development regulation and fruit quality formation in mandarin-orange hybrids.
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Synergetic modulation of plant cadmium tolerance via MYB75-mediated ROS homeostasis and transcriptional regulation. PLANT CELL REPORTS 2022; 41:1515-1530. [PMID: 35503475 DOI: 10.1007/s00299-022-02871-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2022] [Accepted: 03/25/2022] [Indexed: 02/08/2023]
Abstract
KEY MESSAGE MYB75 enhances plant cadmium tolerance by mediating ROS homeostasis and cadmium tolerance-related genes expression. Cadmium (Cd) is a heavy metal with biological toxicity, which can be detoxified through chelation and compartmentation in plants. Transcriptional regulation mediates plant Cd tolerance by modulating these processes. However, the mechanism remains to be studied. Our results showed a previously unknown function of MYB75 transcription factor in the regulation of Cd tolerance. Cd exposure stimulates anthocyanin accumulation by raising MYB75 expression. Enhanced Cd tolerance was observed in the MYB75-overexpressing plants, whereas increased Cd sensitivity was found in the MYB75 loss-of-function mutants. Under Cd stress conditions, lower reactive oxygen species (ROS) levels were detected in MYB75-overexpressing plants than in wild type plants. In contrast, higher ROS levels were found in MYB75 loss-of-function mutants. Overexpression of MYB75 was associated with increased glutathione (GSH) and phytochelatin (PC) content under Cd exposure. Furthermore, the expression of Cd stress-related gene including ACBP2 and ABCC2 was elevated in MYB75-overexpressing plants, and this upregulation was mediated through the mechanism by which MYB75 directly bind to the promoter of ACBP2 and ABCC2. Our findings reveal an important role for MYB75 in the regulation of plant Cd tolerance via anthocyanin-mediated ROS homeostasis, and through upregulation of Cd stress-related gene at the transcriptional level.
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Does Plant Breeding for Antioxidant-Rich Foods Have an Impact on Human Health? Antioxidants (Basel) 2022; 11:antiox11040794. [PMID: 35453479 PMCID: PMC9024522 DOI: 10.3390/antiox11040794] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Revised: 04/04/2022] [Accepted: 04/12/2022] [Indexed: 02/07/2023] Open
Abstract
Given the general beneficial effects of antioxidants-rich foods on human health and disease prevention, there is a continuous interest in plant secondary metabolites conferring attractive colors to fruits and grains and responsible, together with others, for nutraceutical properties. Cereals and Solanaceae are important components of the human diet, thus, they are the main targets for functional food development by exploitation of genetic resources and metabolic engineering. In this review, we focus on the impact of antioxidants-rich cereal and Solanaceae derived foods on human health by analyzing natural biodiversity and biotechnological strategies aiming at increasing the antioxidant level of grains and fruits, the impact of agronomic practices and food processing on antioxidant properties combined with a focus on the current state of pre-clinical and clinical studies. Despite the strong evidence in in vitro and animal studies supporting the beneficial effects of antioxidants-rich diets in preventing diseases, clinical studies are still not sufficient to prove the impact of antioxidant rich cereal and Solanaceae derived foods on human
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Jin Z, Wang J, Cao X, Wei C, Kuang J, Chen K, Zhang B. Peach fruit PpNAC1 activates PpFAD3-1 transcription to provide ω-3 fatty acids for the synthesis of short-chain flavor volatiles. HORTICULTURE RESEARCH 2022; 9:uhac085. [PMID: 35685221 PMCID: PMC9172071 DOI: 10.1093/hr/uhac085] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Accepted: 03/27/2022] [Indexed: 06/15/2023]
Abstract
Volatile organic compounds (VOCs) derived from fatty acids are major contributors to fruit flavor and affect human preferences. The ω-3 fatty acid linolenic acid 3 (18:3) serves as an important precursor for synthesis of (E)-2-hexenal and (Z)-3-hexenol. These short-chain C6 VOCs provide unique fresh notes in multiple fruit species. Metabolic engineering to improve fruit aroma requires knowledge of the regulation of fatty acid-derived VOCs. Here, we determined that ripe fruit-specific expression of PpFAD3-1 contributes to 18:3 synthesis in peach fruit. However, no significant increases in (E)-2-hexenal and (Z)-3-hexenol were detected after overexpressing PpFAD3-1. Interestingly, overexpressing the PpNAC1 transcription factor increased the content of 18:3 and enhanced the production of its derived volatiles. Moreover, induced expression of genes responsible for downstream VOC synthesis was observed for transgenic tomato fruit overexpressing PpNAC1, but not for transgenic fruit overexpressing PpFAD3-1. Electrophoretic mobility shift and ChIP-Seq assays showed that PpNAC1 activated PpFAD3-1 expression via binding to its promoter. Therefore, PpNAC1 plays an important role in modulating fatty acid flux to produce fruit flavor-related VOCs. In addition to PpNAC1, PpFAD3-1 expression was also associated with epigenetic modifications during peach fruit ripening. Taken together, our results provide new insights into the molecular mechanisms regulating biosynthesis of fatty acid and short-chain VOCs in fruit.
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Affiliation(s)
- Zhengnan Jin
- Laboratory of Fruit Quality Biology, Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Zhejiang University, Zijingang Campus, Hangzhou 310058, China
| | - Jiaojiao Wang
- School of Agriculture and Biology, Shanghai Jiao Tong University, Minhang Campus, Shanghai 200240, China
| | - Xiangmei Cao
- Laboratory of Fruit Quality Biology, Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Zhejiang University, Zijingang Campus, Hangzhou 310058, China
| | - Chunyan Wei
- Laboratory of Fruit Quality Biology, Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Zhejiang University, Zijingang Campus, Hangzhou 310058, China
| | - Jianfei Kuang
- Guangdong Key Laboratory for Postharvest Science, College of Horticultural Science, South China Agricultural University, Guangzhou 510642, China
| | - Kunsong Chen
- Laboratory of Fruit Quality Biology, Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Zhejiang University, Zijingang Campus, Hangzhou 310058, China
| | - Bo Zhang
- Laboratory of Fruit Quality Biology, Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Zhejiang University, Zijingang Campus, Hangzhou 310058, China
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Mattus-Araya E, Guajardo J, Herrera R, Moya-León MA. ABA Speeds Up the Progress of Color in Developing F. chiloensis Fruit through the Activation of PAL, CHS and ANS, Key Genes of the Phenylpropanoid/Flavonoid and Anthocyanin Pathways. Int J Mol Sci 2022; 23:ijms23073854. [PMID: 35409213 PMCID: PMC8998795 DOI: 10.3390/ijms23073854] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Revised: 03/24/2022] [Accepted: 03/28/2022] [Indexed: 12/03/2022] Open
Abstract
Phenolic compounds with antioxidant properties have risen in interest due to their benefits for human health. Fragaria chiloensis is a native wild berry species from Chile that develops a white/pink receptacle and white flesh at the ripe stage. Changes in color parameters, anthocyanins, secondary metabolites (phenolics, flavonoids), and total antioxidant capacity were followed during the development and ripening of F. chiloensis fruit. The increment in color ‘a’ index takes place in parallel with anthocyanins rise and the reduction in phenolics, flavonoids, and antioxidant capacity. Good correlations were determined between color development, anthocyanins, and the expression of key phenylpropanoid/flavonoid and anthocyanin pathway genes. To investigate the role of ABA on color development, detached immature fruit (C2 stage) were treated with exogenous ABA and stored at 20 °C. Fruit color development was accelerated by ABA treatment compared to non-treated fruit, and consistent with that, the increment in the accumulation of anthocyanins and transcripts of phenylpropanoid/flavonoid, and anthocyanin pathways genes such as FcPAL, FcCHS, and FcANS were observed. This suggests that ABA promotes transcriptional changes that lead to the color formation on this non-climacteric fruit.
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Wong DCJ, Perkins J, Peakall R. Anthocyanin and Flavonol Glycoside Metabolic Pathways Underpin Floral Color Mimicry and Contrast in a Sexually Deceptive Orchid. FRONTIERS IN PLANT SCIENCE 2022; 13:860997. [PMID: 35401591 PMCID: PMC8983864 DOI: 10.3389/fpls.2022.860997] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Accepted: 02/17/2022] [Indexed: 06/10/2023]
Abstract
Sexually deceptive plants secure pollination by luring specific male insects as pollinators using a combination of olfactory, visual, and morphological mimicry. Flower color is a key component to this attraction, but its chemical and genetic basis remains poorly understood. Chiloglottis trapeziformis is a sexually deceptive orchid which has predominantly dull green-red flowers except for the central black callus projecting from the labellum lamina. The callus mimics the female of the pollinator and the stark color contrast between the black callus and dull green or red lamina is thought to enhance the visibility of the mimic. The goal of this study was to investigate the chemical composition and genetic regulation of temporal and spatial color patterns leading to visual mimicry, by integrating targeted metabolite profiling and transcriptomic analysis. Even at the very young bud stage, high levels of anthocyanins were detected in the dark callus, with peak accumulation by the mature bud stage. In contrast, anthocyanin levels in the lamina peaked as the buds opened and became reddish-green. Coordinated upregulation of multiple genes, including dihydroflavonol reductase and leucoanthocyanidin dioxygenase, and the downregulation of flavonol synthase genes (FLS) in the callus at the very young bud stage underpins the initial high anthocyanin levels. Conversely, within the lamina, upregulated FLS genes promote flavonol glycoside over anthocyanin production, with the downstream upregulation of flavonoid O-methyltransferase genes further contributing to the accumulation of methylated flavonol glycosides, whose levels peaked in the mature bud stage. Finally, the peak anthocyanin content of the reddish-green lamina of the open flower is underpinned by small increases in gene expression levels and/or differential upregulation in the lamina in select anthocyanin genes while FLS patterns showed little change. Differential expression of candidate genes involved in specific transport, vacuolar acidification, and photosynthetic pathways may also assist in maintaining the distinct callus and contrasting lamina color from the earliest bud stage through to the mature flower. Our findings highlight that flower color in this sexually deceptive orchid is achieved by complex tissue-specific coordinated regulation of genes and biochemical pathways across multiple developmental stages.
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Liu X, Liu HF, Li HL, An XH, Song LQ, You CX, Zhao LL, Tian Y, Wang XF. MdMYB10 affects nitrogen uptake and reallocation by regulating the nitrate transporter MdNRT2.4-1 in the red flesh apple. HORTICULTURE RESEARCH 2022; 9:uhac016. [PMID: 35184189 PMCID: PMC9016894 DOI: 10.1093/hr/uhac016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Revised: 12/24/2021] [Accepted: 01/04/2022] [Indexed: 06/14/2023]
Abstract
Nitrate is the major nitrogen sources for higher plants. In addition to serving not only as a nutrient, it is also a signaling molecule that regulates plant growth and development. Although membrane-bound nitrate transporter/peptide transporters (NRT/PTR) have been extensively studied and shown to regulate nitrate uptake and movement, little is known about how these factors are regulated by the external nitrogen environment. Red flesh apple, the coloration of which is determined by the transcription factor MdMYB10, had higher nitrate uptake efficiency than non-red flesh apple. Nitrate assimilation and utilization were increased in red flesh apple cultivar, and comparative transcriptome analysis showed that the expression of genes encoding the NRT2s was increased in red flesh apple. In vitro and in vivo experiments showed that MdMYB10 directly bound to the MdNRT2.4-1 promoter to transcriptionally activate its expression, resulting in enhanced nitrate uptake. MdMYB10 also controlled nitrate reallocation from old leaves to new leaves through MdNRT2.4-1. Overall, our findings provide novel insights into the mechanism by which MdMYB10 controls nitrate uptake and reallocation in apple, which facilitates adaptation to low nitrogen environment.
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Affiliation(s)
- Xin Liu
- State Key Laboratory of Crop Biology, Shandong Collaborative Innovation Center of Fruit & Vegetable Quality and Efficient Production, Shandong Green Fertilizer Technology Innovation Center, College of Horticulture Science and Engineering, Shandong Agricultural University, Taian 271018, Shandong, China
- Beijing Academy of Forestry and Pomology Sciences, Beijing, China
| | - Hao-Feng Liu
- State Key Laboratory of Crop Biology, Shandong Collaborative Innovation Center of Fruit & Vegetable Quality and Efficient Production, Shandong Green Fertilizer Technology Innovation Center, College of Horticulture Science and Engineering, Shandong Agricultural University, Taian 271018, Shandong, China
| | - Hong-Liang Li
- State Key Laboratory of Crop Biology, Shandong Collaborative Innovation Center of Fruit & Vegetable Quality and Efficient Production, Shandong Green Fertilizer Technology Innovation Center, College of Horticulture Science and Engineering, Shandong Agricultural University, Taian 271018, Shandong, China
| | - Xiu-Hong An
- National Engineering Research Center for Agriculture in Northern Mountainous Areas, Agricultural Technology Innovation Center in Mountainous Areas of Hebei Province, Hebei Agricultural University, Baoding, Hebei, China
| | - Lai-Qing Song
- Yantai Academy of Agricultural Sciences, Yantai, Shandong, China
| | - Chun-Xiang You
- State Key Laboratory of Crop Biology, Shandong Collaborative Innovation Center of Fruit & Vegetable Quality and Efficient Production, Shandong Green Fertilizer Technology Innovation Center, College of Horticulture Science and Engineering, Shandong Agricultural University, Taian 271018, Shandong, China
| | - Ling-Ling Zhao
- Yantai Academy of Agricultural Sciences, Yantai, Shandong, China
| | - Yi Tian
- National Engineering Research Center for Agriculture in Northern Mountainous Areas, Agricultural Technology Innovation Center in Mountainous Areas of Hebei Province, Hebei Agricultural University, Baoding, Hebei, China
| | - Xiao-Fei Wang
- State Key Laboratory of Crop Biology, Shandong Collaborative Innovation Center of Fruit & Vegetable Quality and Efficient Production, Shandong Green Fertilizer Technology Innovation Center, College of Horticulture Science and Engineering, Shandong Agricultural University, Taian 271018, Shandong, China
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Ding T, Tomes S, Gleave AP, Zhang H, Dare AP, Plunkett B, Espley RV, Luo Z, Zhang R, Allan AC, Zhou Z, Wang H, Wu M, Dong H, Liu C, Liu J, Yan Z, Yao JL. microRNA172 targets APETALA2 to regulate flavonoid biosynthesis in apple (Malus domestica). HORTICULTURE RESEARCH 2022; 9:uhab007. [PMID: 35039839 PMCID: PMC8846330 DOI: 10.1093/hr/uhab007] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Revised: 01/18/2022] [Accepted: 10/02/2021] [Indexed: 05/24/2023]
Abstract
MicroRNA172 (miR172) plays a role in regulating a diverse range of plant developmental processes, including flowering, fruit development and nodulation. However, its role in regulating flavonoid biosynthesis is unclear. In this study, we show that transgenic apple plants over-expressing miR172 show a reduction in red coloration and anthocyanin accumulation in various tissue types. This reduction was consistent with decreased expression of APETALA2 homolog MdAP2_1a (a miR172 target gene), MdMYB10, and targets of MdMYB10, as demonstrated by both RNA-seq and qRT-PCR analyses. The positive role of MdAP2_1a in regulating anthocyanin biosynthesis was supported by the enhanced petal anthocyanin accumulation in transgenic tobacco plants overexpressing MdAP2_1a, and by the reduction in anthocyanin accumulation in apple and cherry fruits transfected with an MdAP2_1a virus-induced-gene-silencing construct. We demonstrated that MdAP2_1a could bind directly to the promoter and protein sequences of MdMYB10 in yeast and tobacco, and enhance MdMYB10 promotor activity. In Arabidopsis, over-expression of miR172 reduced flavonoid (including anthocyanins and flavonols) concentration and RNA transcript abundance of flavonoid genes in plantlets cultured on medium containing 7% sucrose. The anthocyanin content and RNA abundance of anthocyanin genes could be partially restored by using a synonymous mutant of MdAP2_1a, which had lost the miR172 target sequences at mRNA level, but not restored by using a WT MdAP2_1a. These results indicate that miR172 inhibits flavonoid biosynthesis through suppressing the expression of an AP2 transcription factor that positively regulates MdMYB10.
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Affiliation(s)
- Tiyu Ding
- Zhengzhou Fruit Research Institute, Chinese Academy of
Agricultural Sciences, 32 Gangwan Road, Zhengzhou 450009, China
| | - Sumathi Tomes
- The New Zealand Institute for Plant & Food Research
Limited, Private Bag 92169, Auckland 1142, New Zealand
| | - Andrew P Gleave
- The New Zealand Institute for Plant & Food Research
Limited, Private Bag 92169, Auckland 1142, New Zealand
| | - Hengtao Zhang
- Zhengzhou Fruit Research Institute, Chinese Academy of
Agricultural Sciences, 32 Gangwan Road, Zhengzhou 450009, China
| | - Andrew P Dare
- The New Zealand Institute for Plant & Food Research
Limited, Private Bag 92169, Auckland 1142, New Zealand
| | - Blue Plunkett
- The New Zealand Institute for Plant & Food Research
Limited, Private Bag 92169, Auckland 1142, New Zealand
| | - Richard V Espley
- The New Zealand Institute for Plant & Food Research
Limited, Private Bag 92169, Auckland 1142, New Zealand
| | - Zhiwei Luo
- The New Zealand Institute for Plant & Food Research
Limited, Private Bag 92169, Auckland 1142, New Zealand
| | - Ruiping Zhang
- Zhengzhou Fruit Research Institute, Chinese Academy of
Agricultural Sciences, 32 Gangwan Road, Zhengzhou 450009, China
| | - Andrew C Allan
- The New Zealand Institute for Plant & Food Research
Limited, Private Bag 92169, Auckland 1142, New Zealand
- School of Biological Sciences, University of
Auckland, Private Bag 92019, Auckland 1142, New Zealand
| | - Zhe Zhou
- Zhengzhou Fruit Research Institute, Chinese Academy of
Agricultural Sciences, 32 Gangwan Road, Zhengzhou 450009, China
| | - Huan Wang
- Zhengzhou Fruit Research Institute, Chinese Academy of
Agricultural Sciences, 32 Gangwan Road, Zhengzhou 450009, China
| | - Mengmeng Wu
- Zhengzhou Fruit Research Institute, Chinese Academy of
Agricultural Sciences, 32 Gangwan Road, Zhengzhou 450009, China
| | - Haiqing Dong
- Zhengzhou Fruit Research Institute, Chinese Academy of
Agricultural Sciences, 32 Gangwan Road, Zhengzhou 450009, China
| | - Chonghuai Liu
- Zhengzhou Fruit Research Institute, Chinese Academy of
Agricultural Sciences, 32 Gangwan Road, Zhengzhou 450009, China
| | - Jihong Liu
- College of Horticulture and Forestry Sciences, Huazhong
Agricultural University, 1 Shizishan Street Wuhan 430070, China
| | - Zhenli Yan
- Zhengzhou Fruit Research Institute, Chinese Academy of
Agricultural Sciences, 32 Gangwan Road, Zhengzhou 450009, China
| | - Jia-Long Yao
- Zhengzhou Fruit Research Institute, Chinese Academy of
Agricultural Sciences, 32 Gangwan Road, Zhengzhou 450009, China
- The New Zealand Institute for Plant & Food Research
Limited, Private Bag 92169, Auckland 1142, New Zealand
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Yang J, Chen Y, Xiao Z, Shen H, Li Y, Wang Y. Multilevel regulation of anthocyanin-promoting R2R3-MYB transcription factors in plants. FRONTIERS IN PLANT SCIENCE 2022; 13:1008829. [PMID: 36147236 PMCID: PMC9485867 DOI: 10.3389/fpls.2022.1008829] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Accepted: 08/22/2022] [Indexed: 05/14/2023]
Abstract
Anthocyanins are common secondary metabolites in plants that confer red, blue, and purple colorations in plants and are highly desired by consumers for their visual appearance and nutritional quality. In the last two decades, the anthocyanin biosynthetic pathway and transcriptional regulation of anthocyanin biosynthetic genes (ABGs) have been well characterized in many plants. From numerous studies on model plants and horticultural crops, many signaling regulators have been found to control anthocyanin accumulation via regulation of anthocyanin-promoting R2R3-MYB transcription factors (so-called R2R3-MYB activators). The regulatory mechanism of R2R3-MYB activators is mediated by multiple environmental factors (e.g., light, temperature) and internal signals (e.g., sugar, ethylene, and JA) in complicated interactions at multiple levels. Here, we summarize the transcriptional control of R2R3-MYB activators as a result of natural variations in the promoter of their encoding genes, upstream transcription factors and epigenetics, and posttranslational modifications of R2R3-MYB that determine color variations of horticultural plants. In addition, we focus on progress in elucidating the integrated regulatory network of anthocyanin biosynthesis mediated by R2R3-MYB activators in response to multiple signals. We also highlight a few gene cascade modules involved in the regulation of anthocyanin-related R2R3-MYB to provide insights into anthocyanin production in horticultural plants.
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Affiliation(s)
- Jianfei Yang
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin, China
- School of Forestry, Northeast Forestry University, Harbin, China
| | - Yunzhu Chen
- State Key Laboratory of Utilization of Woody Oil Resource, Hunan Academy of Forestry, Changsha, China
| | - Zhihong Xiao
- State Key Laboratory of Utilization of Woody Oil Resource, Hunan Academy of Forestry, Changsha, China
| | - Hailong Shen
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin, China
- School of Forestry, Northeast Forestry University, Harbin, China
| | - Yuhua Li
- College of Life Sciences, Northeast Forestry University, Harbin, China
- Yuhua Li,
| | - Yu Wang
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin, China
- College of Life Sciences, Northeast Forestry University, Harbin, China
- *Correspondence: Yu Wang,
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Liu W, Zheng T, Yang Y, Li P, Qiu L, Li L, Wang J, Cheng T, Zhang Q. Meta-Analysis of the Effect of Overexpression of MYB Transcription Factors on the Regulatory Mechanisms of Anthocyanin Biosynthesis. FRONTIERS IN PLANT SCIENCE 2021; 12:781343. [PMID: 34975967 PMCID: PMC8714666 DOI: 10.3389/fpls.2021.781343] [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: 09/22/2021] [Accepted: 11/22/2021] [Indexed: 05/30/2023]
Abstract
MYBs (v-myb avian myeloblastosis viral oncogene homologs) are important transcriptional regulators that play critical roles in the regulation of anthocyanin biosynthesis. The overexpression of MYB genes has been reported in different plant species. However, the inconsistent strategies to assess transgenic plants have made it difficult to explain the complex mechanisms of regulation of anthocyanin biosynthesis by MYBs. We report here a meta-analysis of 608 studies from 206 publications assessing the effects of MYB overexpression on anthocyanins and evaluate the experimental variables that have an influence on transgenic plant performance. We found that MYB expression enhanced the magnitude of 20 out of 26 examined plant parameters by at least of 21% and reduced the magnitude of 1 indicator by at least 37%. We explored the variety of moderating variables causing these variations. A deeper color induced by MYBs caused higher plant attributes as compared to normal color changes. MYB genes from dicots stimulated the accumulation of anthocyanins, flavonols and impacted the expressions of PAL, CHS, CHI, FLS, F3'5'H, ANS, UFGT, and ANR as compared to monocots. Heterologous expression and homologous expression showed a great difference in anthocyanin biosynthesis. Transient gene transformation had a significant effect on the expression of flavonoid biosynthetic genes, and stable transformation had a significant effect on flavonoid accumulation. Stress could result in a significantly increased accumulation of flavonoids, especially anthocyanin, flavonol, and proanthocyanidin. Our study, thus, provides new insights into the function of MYBs in the regulatory mechanisms of flavonoid biosynthesis and the use of genetic engineering for improving anthocyanins contents.
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Shen Z, Li W, Li Y, Liu M, Cao H, Provart N, Ding X, Sun M, Tang Z, Yue C, Cao Y, Yuan D, Zhang L. The red flower wintersweet genome provides insights into the evolution of magnoliids and the molecular mechanism for tepal color development. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2021; 108:1662-1678. [PMID: 34624152 DOI: 10.1111/tpj.15533] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Accepted: 10/01/2021] [Indexed: 06/13/2023]
Abstract
Wintersweet (Chimonanthus praecox) is one of the most important ornamental plants. Its color is mainly determined by the middle tepals. However, the molecular mechanisms underlying the intriguing flower color development among different wintersweet groups are still largely unknown. In addition, wintersweet belongs to magnoliids, and the phylogenetic position of magnoliids remains to be determined conclusively. Here, the whole genome of red flower wintersweet, a new wintersweet type, was sequenced and assembled with high quality. The genome comprised 11 super-scaffolds (chromosomes) with a total size of 737.03 Mb. Based on the analyses of the long branch attraction, incomplete lineage sorting, sparse taxon sampling, and other factors, we suggest that a bifurcating tree may not fully represent the complex early diversification of the angiosperms and that magnoliids are most likely sister to the eudicots. The wintersweet genome appears to have undergone two whole-genome duplication (WGD) events: a recent WGD event representing an independent event specific to the Calycanthaceae and an ancient WGD event shared by Laurales. By integrating genomic, transcriptomic, and metabolomic data, CpANS1 and the transcription factor CpMYB1 were found to play key roles in regulating tepal color development, whereas CpMYB1 needs to form a complex with bHLH and WD40 to fully perform its regulatory function. The present study not only provides novel insights into the evolution of magnoliids and the molecular mechanism for flower color development, but also lays the foundation for subsequent functional genomics study and molecular breeding of wintersweet.
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Affiliation(s)
- Zhiguo Shen
- Key Laboratory of Cultivation and Protection for Non-Wood Forest Trees, Ministry of Education, Central South University of Forestry and Technology, Changsha, Hunan, 410004, People's Republic of China
- National Innovation Alliance of Wintersweet, Henan Academy of Forestry, Zhengzhou, Henan, 450008, People's Republic of China
| | - Wenying Li
- Key Laboratory of Cultivation and Protection for Non-Wood Forest Trees, Ministry of Education, Central South University of Forestry and Technology, Changsha, Hunan, 410004, People's Republic of 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, Hunan, 410004, People's Republic of China
| | - Meilan Liu
- Key Laboratory of Cultivation and Protection for Non-Wood Forest Trees, Ministry of Education, Central South University of Forestry and Technology, Changsha, Hunan, 410004, People's Republic of China
| | - Heping Cao
- US Department of Agriculture, Agricultural Research Service, Southern Regional Research Center, New Orleans, LA, 70124, USA
| | - Nicholas Provart
- Department of Cell and Systems Biology/Centre for the Analysis of Genome Evolution and Function, University of Toronto, Toronto, ON, M5S 3B2, Canada
| | - Xin Ding
- National Innovation Alliance of Wintersweet, Henan Academy of Forestry, Zhengzhou, Henan, 450008, People's Republic of China
| | - Meng Sun
- National Innovation Alliance of Wintersweet, Henan Academy of Forestry, Zhengzhou, Henan, 450008, People's Republic of China
| | - Zhenghui Tang
- National Innovation Alliance of Wintersweet, Henan Academy of Forestry, Zhengzhou, Henan, 450008, People's Republic of China
| | - Changping Yue
- Forestry Research Institute of Yanling County, Xuchang, Henan, 461200, People's Republic of China
| | - Yunpeng Cao
- Key Laboratory of Cultivation and Protection for Non-Wood Forest Trees, Ministry of Education, Central South University of Forestry and Technology, Changsha, Hunan, 410004, People's Republic of China
| | - Deyi Yuan
- Key Laboratory of Cultivation and Protection for Non-Wood Forest Trees, Ministry of Education, Central South University of Forestry and Technology, Changsha, Hunan, 410004, People's Republic of China
| | - Lin Zhang
- Key Laboratory of Cultivation and Protection for Non-Wood Forest Trees, Ministry of Education, Central South University of Forestry and Technology, Changsha, Hunan, 410004, People's Republic of China
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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.
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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
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Sabbadini S, Capocasa F, Battino M, Mazzoni L, Mezzetti B. Improved nutritional quality in fruit tree species through traditional and biotechnological approaches. Trends Food Sci Technol 2021. [DOI: 10.1016/j.tifs.2021.01.083] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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48
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Li C, Pei J, Yan X, Cui X, Tsuruta M, Liu Y, Lian C. A poplar B-box protein PtrBBX23 modulates the accumulation of anthocyanins and proanthocyanidins in response to high light. PLANT, CELL & ENVIRONMENT 2021; 44:3015-3033. [PMID: 34114251 DOI: 10.1111/pce.14127] [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: 11/06/2020] [Revised: 05/14/2021] [Accepted: 06/01/2021] [Indexed: 05/20/2023]
Abstract
Flavonoids, which modulate plant resistance to various stresses, can be induced by high light. B-box (BBX) transcription factors (TFs) play crucial roles in the transcriptional regulation of flavonoids biosynthesis, but limited information is available on the association of BBX proteins with high light. We present a detailed overview of 45 Populus trichocarpa BBX TFs. Phylogenetic relationships, gene structure, tissue-specific expression patterns and expression profiles were determined under 10 stress or phytohormone treatments to screen candidate BBX proteins associated with the flavonoid pathway. Sixteen candidate genes were identified, of which five were expressed predominantly in young leaves and roots, and BBX23 showed the most distinct response to high light. Overexpression of BBX23 in poplar activated expression of MYB TFs and structural genes in the flavonoid pathway, thereby promoting the accumulation of proanthocyanidins and anthocyanins. CRISPR/Cas9-generated knockout of BBX23 resulted in the opposite trend. Furthermore, the phenotype induced by BBX23 overexpression was enhanced under exposure to high light. BBX23 was capable of binding directly to the promoters of proanthocyanidin- and anthocyanin-specific genes, and its interaction with HY5 enhanced activation activity. We identified novel regulators of flavonoid biosynthesis in poplar, thereby enhancing our general understanding of the transcriptional regulatory mechanisms involved.
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Affiliation(s)
- Chaofeng Li
- Laboratory of Forest Symbiology, Asian Research Center for Bioresource and Environmental Sciences, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
| | - Jinli Pei
- Shandong Cancer Hospital and Institute, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, China
| | - Xin Yan
- Plant Biotechnology Research Center, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, China
| | - Xin Cui
- College of Grassland Science and Technology, China Agricultural University, Beijing, China
| | - Momi Tsuruta
- Laboratory of Forest Symbiology, Asian Research Center for Bioresource and Environmental Sciences, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
| | - Ying Liu
- International Joint Laboratory of Forest Symbiology, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Chunlan Lian
- Laboratory of Forest Symbiology, Asian Research Center for Bioresource and Environmental Sciences, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
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Li S, Chen K, Grierson D. Molecular and Hormonal Mechanisms Regulating Fleshy Fruit Ripening. Cells 2021; 10:1136. [PMID: 34066675 PMCID: PMC8151651 DOI: 10.3390/cells10051136] [Citation(s) in RCA: 71] [Impact Index Per Article: 23.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2021] [Revised: 05/03/2021] [Accepted: 05/05/2021] [Indexed: 12/17/2022] Open
Abstract
This article focuses on the molecular and hormonal mechanisms underlying the control of fleshy fruit ripening and quality. Recent research on tomato shows that ethylene, acting through transcription factors, is responsible for the initiation of tomato ripening. Several other hormones, including abscisic acid (ABA), jasmonic acid (JA) and brassinosteroids (BR), promote ripening by upregulating ethylene biosynthesis genes in different fruits. Changes to histone marks and DNA methylation are associated with the activation of ripening genes and are necessary for ripening initiation. Light, detected by different photoreceptors and operating through ELONGATED HYPOCOTYL 5(HY5), also modulates ripening. Re-evaluation of the roles of 'master regulators' indicates that MADS-RIN, NAC-NOR, Nor-like1 and other MADS and NAC genes, together with ethylene, promote the full expression of genes required for further ethylene synthesis and change in colour, flavour, texture and progression of ripening. Several different types of non-coding RNAs are involved in regulating expression of ripening genes, but further clarification of their diverse mechanisms of action is required. We discuss a model that integrates the main hormonal and genetic regulatory interactions governing the ripening of tomato fruit and consider variations in ripening regulatory circuits that operate in other fruits.
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Affiliation(s)
- Shan Li
- College of Agriculture & Biotechnology, Zijingang Campus, Zhejiang University, Hangzhou 310058, China;
| | - Kunsong Chen
- College of Agriculture & Biotechnology, Zijingang Campus, Zhejiang University, Hangzhou 310058, China;
- Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Zijingang Campus, Zhejiang University, Hangzhou 310058, China
| | - Donald Grierson
- College of Agriculture & Biotechnology, Zijingang Campus, Zhejiang University, Hangzhou 310058, China;
- Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Zijingang Campus, Zhejiang University, Hangzhou 310058, China
- Plant and Crop Sciences Division, School of Biosciences, Sutton Bonington Campus, University of Nottingham, Loughborough LE12 5RD, UK
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50
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Cao X, Wei C, Duan W, Gao Y, Kuang J, Liu M, Chen K, Klee H, Zhang B. Transcriptional and epigenetic analysis reveals that NAC transcription factors regulate fruit flavor ester biosynthesis. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2021; 106:785-800. [PMID: 33595854 DOI: 10.1111/tpj.15200] [Citation(s) in RCA: 44] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2020] [Revised: 02/08/2021] [Accepted: 02/12/2021] [Indexed: 05/27/2023]
Abstract
Flavor-associated volatile chemicals make major contributions to consumers' perception of fruits. Although great progress has been made in establishing the metabolic pathways associated with volatile synthesis, much less is known about the regulation of those pathways. Knowledge of how those pathways are regulated would greatly facilitate efforts to improve flavor. Volatile esters are major contributors to fruity flavor notes in many species, providing a good model to investigate the regulation of volatile synthesis pathways. Here we initiated a study of peach (Prunus persica L. Batsch) fruits, and identified that the alcohol acyltransferase PpAAT1 contributes to ester formation. We next identified the transcription factor (TF) PpNAC1 as an activator of PpAAT1 expression and ester production. These conclusions were based on in vivo and in vitro experiments and validated by correlation in a panel of 30 different peach cultivars. Based on homology between PpNAC1 and the tomato (Solanum lycopersicum) TF NONRIPENING (NOR), we identified a parallel regulatory pathway in tomato. Overexpression of PpNAC1 enhances ripening in a nor mutant and restores synthesis of volatile esters in tomato fruits. Furthermore, in the NOR-deficient mutant tomatoes generated by CRISPR/Cas9, lower transcript levels of SlAAT1 were detected. The apple (Malus domestica) homolog MdNAC5 also stimulates MdAAT1 expression via binding to this gene's promoter. In addition to transcriptional control, epigenetic analysis showed that increased expression of NACs and AATs is associated with removal of the repressive mark H3K27me3 during fruit ripening. Our results support a conserved molecular mechanism in which NAC TFs activate ripening-related AAT expression, which in turn catalyzes volatile ester formation in multiple fruit species.
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Affiliation(s)
- Xiangmei Cao
- Laboratory of Fruit Quality Biology/Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Zhejiang University, Zijingang Campus, Hangzhou, 310058, China
| | - Chunyan Wei
- Laboratory of Fruit Quality Biology/Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Zhejiang University, Zijingang Campus, Hangzhou, 310058, China
| | - Wenyi Duan
- Laboratory of Fruit Quality Biology/Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Zhejiang University, Zijingang Campus, Hangzhou, 310058, China
| | - Ying Gao
- Laboratory of Fruit Quality Biology/Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Zhejiang University, Zijingang Campus, Hangzhou, 310058, China
| | - Jianfei Kuang
- Guangdong Key Laboratory for Postharvest Science, College of Horticultural Science, South China Agricultural University, Guangzhou, 510642, China
| | - Mingchun Liu
- Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, 610065, China
| | - Kunsong Chen
- Laboratory of Fruit Quality Biology/Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Zhejiang University, Zijingang Campus, Hangzhou, 310058, China
| | - Harry Klee
- Laboratory of Fruit Quality Biology/Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Zhejiang University, Zijingang Campus, Hangzhou, 310058, China
- Horticultural Sciences, Plant Innovation Center, Genetic Institute, University of Florida, Gainesville, FL, 32611, USA
| | - Bo Zhang
- Laboratory of Fruit Quality Biology/Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Zhejiang University, Zijingang Campus, Hangzhou, 310058, China
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