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Xue Q, Zhang Q, Zhang A, Li D, Liu Y, Xu H, Yang Q, Liu F, Han T, Tang X, Zhang X. Integrated metabolome and transcriptome analysis provides clues to fruit color formation of yellow, orange, and red bell pepper. Sci Rep 2024; 14:29737. [PMID: 39613866 DOI: 10.1038/s41598-024-81005-w] [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: 08/24/2024] [Accepted: 11/22/2024] [Indexed: 12/01/2024] Open
Abstract
Fruit color is a crucial trait for bell pepper. To investigate the mechanism of color formation, three bell pepper lines with different color (yellow, orange and red) were used as materials to conduct comprehensive targeted metabolomic and transcriptomic analyses. During the process of fruit development, 54 carotenoids metabolites were discovered, exhibiting unique accumulation patterns and notable variety specificity. The types and content of carotenoids in orange fruit (OM) were notably greater compared to the other two varieties. Red pigment (capsanthin and capsorubin) was specifically enriched in red fruit (RM), and yellow pigment (lutein and zeaxanthin) is the highest in yellow fruit (YM) and OM. Five modules positively correlated with carotenoid accumulation and one negative module was determined by weighted gene co-expression network analysis (WGCNA). Additionally, transcription factors (TFs) and hub genes related to carotenoid synthesis were predicted. By elucidating the regulation of 7 key carotenoid metabolites by 14 critical genes and 5 key TFs, we constructed a comprehensive carotenoid biosynthesis metabolic network that comprehensively explains the pigment changes observed in green and mature pepper fruit. Overall, the results not only provide important insights into carotenoid synthesis pathway, but also lay a solid base for revealing the mechanism of bell pepper color transformation.
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Affiliation(s)
- Qiqin Xue
- Jia Sixie College of Agriculture, Shandong Provincial University Laboratory for Protected Horticulture, Weifang University of Science and Technology, Shouguang, 262700, China
| | - Qingxia Zhang
- Jia Sixie College of Agriculture, Shandong Provincial University Laboratory for Protected Horticulture, Weifang University of Science and Technology, Shouguang, 262700, China
| | - Aiai Zhang
- Jia Sixie College of Agriculture, Shandong Provincial University Laboratory for Protected Horticulture, Weifang University of Science and Technology, Shouguang, 262700, China
| | - Da Li
- Jia Sixie College of Agriculture, Shandong Provincial University Laboratory for Protected Horticulture, Weifang University of Science and Technology, Shouguang, 262700, China
- Shandong Protected Horticulture Technology Innovation Center, Shouguang, 262700, China
| | - Yongguang Liu
- Jia Sixie College of Agriculture, Shandong Provincial University Laboratory for Protected Horticulture, Weifang University of Science and Technology, Shouguang, 262700, China
- Shandong Protected Horticulture Technology Innovation Center, Shouguang, 262700, China
| | - Haicheng Xu
- Jia Sixie College of Agriculture, Shandong Provincial University Laboratory for Protected Horticulture, Weifang University of Science and Technology, Shouguang, 262700, China
- Shandong Protected Horticulture Technology Innovation Center, Shouguang, 262700, China
| | - Qinghua Yang
- Jia Sixie College of Agriculture, Shandong Provincial University Laboratory for Protected Horticulture, Weifang University of Science and Technology, Shouguang, 262700, China
| | - Fengyan Liu
- Jia Sixie College of Agriculture, Shandong Provincial University Laboratory for Protected Horticulture, Weifang University of Science and Technology, Shouguang, 262700, China
| | - Tongyao Han
- Jia Sixie College of Agriculture, Shandong Provincial University Laboratory for Protected Horticulture, Weifang University of Science and Technology, Shouguang, 262700, China
| | - Xiaozhen Tang
- Jia Sixie College of Agriculture, Shandong Provincial University Laboratory for Protected Horticulture, Weifang University of Science and Technology, Shouguang, 262700, China
| | - Xiurong Zhang
- Jia Sixie College of Agriculture, Shandong Provincial University Laboratory for Protected Horticulture, Weifang University of Science and Technology, Shouguang, 262700, China.
- Shandong Protected Horticulture Technology Innovation Center, Shouguang, 262700, China.
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Wei K, Tang J, Yang L, Chen S, Cheng Z, Yang Y, Xu C, Wu S, Zhao Y, Di H, Li L, Sun D, Li J, Sun B. Preharvest Application of Exogenous 2,4-Epibrassinolide and Melatonin Enhances the Maturity and Flue-Cured Quality of Tobacco Leaves. PLANTS (BASEL, SWITZERLAND) 2024; 13:3266. [PMID: 39683059 DOI: 10.3390/plants13233266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2024] [Revised: 11/11/2024] [Accepted: 11/15/2024] [Indexed: 12/18/2024]
Abstract
Tobacco (Nicotiana tabacum) is a globally cultivated crop, with its quality closely associated with the color and chemical composition of cured tobacco leaves. In this experiment, the effects of spraying exogenous 2, 4-epibrassinolide (EBR) and melatonin (MT) on the development of tobacco leaves at maturity stage and the quality after curing were investigated. Both EBR and MT treatments significantly enhanced the appearance quality of tobacco leaves at the stem-drying stage. Following preharvest applications, the sugar-to-alkali ratio and potassium content increased, while the contents of starch, total alkaloids, and proteins decreased. The levels of conventional chemical components were improved, enhancing the overall coordination of the tobacco. Transcriptome analysis revealed that EBR treatment down-regulated the chlorophyll biosynthetic genes hemA, MgPEC, and ChlD, while up-regulating the chlorophyll degradation genes CHL2, SGR, and PAOs. Similarly, MT treatment down-regulated the chlorophyll biosynthetic genes FC2 and MgPEC and up-regulated the degradation genes CHL2 and SGR, thus promoting chlorophyll degradation. Furthermore, in the downstream carotenoid biosynthetic pathway, both EBR and MT treatments regulated abscisic acid-related genes, with NCEDs being up-regulated and CYP707A1s down-regulated, thereby promoting the leaf ripening. Metabolomics analysis indicated that EBR treatment primarily regulated alkaloids, terpenoids, and flavonoids, while MT treatment mainly affected flavonoids. Both treatments also reduced the accumulation of the harmful substance aristolochic acid B. Comprehensive evaluations of appearance quality, physiological parameters, transcriptome, and metabolomics analyses demonstrated that exogenous spraying of EBR and MT treatments improved the maturity and quality of cured tobacco leaves, with EBR treatment exhibiting a greater effect than MT treatment.
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Affiliation(s)
- Kesu Wei
- Guizhou Academy of Tobacco Science, Guizhou Provincial Academician Workstation of Microbiology and Health, Guiyang 550081, China
| | - Jiayi Tang
- Guizhou Academy of Tobacco Science, Guizhou Provincial Academician Workstation of Microbiology and Health, Guiyang 550081, China
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China
| | - Lei Yang
- Guizhou Academy of Tobacco Science, Guizhou Provincial Academician Workstation of Microbiology and Health, Guiyang 550081, China
| | - Shaopeng Chen
- Chongqing Tobacco Science Institute, Chongqing 409199, China
| | - Zhijun Cheng
- Guizhou Academy of Tobacco Science, Guizhou Provincial Academician Workstation of Microbiology and Health, Guiyang 550081, China
| | - Yijun Yang
- Guizhou Academy of Tobacco Science, Guizhou Provincial Academician Workstation of Microbiology and Health, Guiyang 550081, China
| | - Chen Xu
- Chongqing Tobacco Science Institute, Chongqing 409199, China
| | - Shengjiang Wu
- Guizhou Academy of Tobacco Science, Guizhou Provincial Academician Workstation of Microbiology and Health, Guiyang 550081, China
| | - Yuhang Zhao
- Guizhou Academy of Tobacco Science, Guizhou Provincial Academician Workstation of Microbiology and Health, Guiyang 550081, China
| | - Hongmei Di
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China
| | - Ling Li
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China
| | - Dongyang Sun
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China
| | - Jianwei Li
- Guizhou Academy of Tobacco Science, Guizhou Provincial Academician Workstation of Microbiology and Health, Guiyang 550081, China
| | - Bo Sun
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China
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Zhang Y, Jin J, Wang N, Sun Q, Feng D, Zhu S, Wang Z, Li S, Ye J, Chai L, Xie Z, Deng X. Cytochrome P450 CitCYP97B modulates carotenoid accumulation diversity by hydroxylating β-cryptoxanthin in Citrus. PLANT COMMUNICATIONS 2024; 5:100847. [PMID: 38379285 PMCID: PMC11211522 DOI: 10.1016/j.xplc.2024.100847] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2023] [Revised: 12/21/2023] [Accepted: 02/18/2024] [Indexed: 02/22/2024]
Abstract
Carotenoids in plant foods provide health benefits by functioning as provitamin A. One of the vital provitamin A carotenoids, β-cryptoxanthin, is typically plentiful in citrus fruit. However, little is known about the genetic basis of β-cryptoxanthin accumulation in citrus. Here, we performed a widely targeted metabolomic analysis of 65 major carotenoids and carotenoid derivatives to characterize carotenoid accumulation in Citrus and determine the taxonomic profile of β-cryptoxanthin. We used data from 81 newly sequenced representative accessions and 69 previously sequenced Citrus cultivars to reveal the genetic basis of β-cryptoxanthin accumulation through a genome-wide association study. We identified a causal gene, CitCYP97B, which encodes a cytochrome P450 protein whose substrate and metabolic pathways in land plants were undetermined. We subsequently demonstrated that CitCYP97B functions as a novel monooxygenase that specifically hydroxylates the β-ring of β-cryptoxanthin in a heterologous expression system. In planta experiments provided further evidence that CitCYP97B negatively regulates β-cryptoxanthin content. Using the sequenced Citrus accessions, we found that two critical structural cis-element variations contribute to increased expression of CitCYP97B, thereby altering β-cryptoxanthin accumulation in fruit. Hybridization/introgression appear to have contributed to the prevalence of two cis-element variations in different Citrus types during citrus evolution. Overall, these findings extend our understanding of the regulation and diversity of carotenoid metabolism in fruit crops and provide a genetic target for production of β-cryptoxanthin-biofortified products.
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Affiliation(s)
- Yingzi Zhang
- National Key Laboratory for Germplasm Innovation & Utilization of Horticultural Crops, College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan 430070, China
| | - Jiajing Jin
- National Key Laboratory for Germplasm Innovation & Utilization of Horticultural Crops, College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan 430070, China
| | - Nan Wang
- National Key Laboratory for Germplasm Innovation & Utilization of Horticultural Crops, College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan 430070, China
| | - Quan Sun
- National Key Laboratory for Germplasm Innovation & Utilization of Horticultural Crops, College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan 430070, China
| | - Di Feng
- National Key Laboratory for Germplasm Innovation & Utilization of Horticultural Crops, College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan 430070, China
| | - Shenchao Zhu
- National Key Laboratory for Germplasm Innovation & Utilization of Horticultural Crops, College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan 430070, China
| | - Zexin Wang
- National Key Laboratory for Germplasm Innovation & Utilization of Horticultural Crops, College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan 430070, China
| | - Shunxin Li
- National Key Laboratory for Germplasm Innovation & Utilization of Horticultural Crops, College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan 430070, China
| | - Junli Ye
- National Key Laboratory for Germplasm Innovation & Utilization of Horticultural Crops, College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan 430070, China
| | - Lijun Chai
- National Key Laboratory for Germplasm Innovation & Utilization of Horticultural Crops, College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan 430070, China
| | - Zongzhou Xie
- National Key Laboratory for Germplasm Innovation & Utilization of Horticultural Crops, College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan 430070, China
| | - Xiuxin Deng
- National Key Laboratory for Germplasm Innovation & Utilization of Horticultural Crops, College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan 430070, China; Hubei Hongshan Laboratory, Wuhan, Hubei 430070, China.
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Li X, Zheng M, Gan Q, Long J, Fan H, Wang X, Guan Z. The formation and evolution of flower coloration in Brassica crops. Front Genet 2024; 15:1396875. [PMID: 38881796 PMCID: PMC11177764 DOI: 10.3389/fgene.2024.1396875] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2024] [Accepted: 05/13/2024] [Indexed: 06/18/2024] Open
Abstract
The flower coloration of Brassica crops possesses significant application and economic value, making it a research hotspot in the field of genetics and breeding. In recent years, great progress has been made in the research on color variation and creation of Brassica crops. However, the underlying molecular mechanisms and evolutional processes of flower colors are poorly understood. In this paper, we present a comprehensive overview of the mechanism of flower color formation in plants, emphasizing the molecular basis and regulation mechanism of flavonoids and carotenoids. By summarizing the recent advances on the genetic mechanism of flower color formation and regulation in Brassica crops, it is clearly found that carotenoids and anthocyanins are major pigments for flower color diversity of Brassica crops. Meantime, we also explore the relationship between the emergence of white flowers and the genetic evolution of Brassica chromosomes, and analyze the innovation and multiple utilization of Brassica crops with colorful flowers. This review aims to provide theoretical support for genetic improvements in flower color, enhancing the economic value and aesthetic appeal of Brassica crops.
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Affiliation(s)
- Xuewei Li
- Jiangxi Provincial Institute of Traditional Chinese Medicine, Jiangxi Research Center for Protection and Development of Traditional Chinese Medicine Resources, Key Laboratory of Germplasm Selection and Breeding of Chinese Medicinal Materials, Nanchang, Jiangxi, China
| | - Mingmin Zheng
- Jiangxi Provincial Institute of Traditional Chinese Medicine, Jiangxi Research Center for Protection and Development of Traditional Chinese Medicine Resources, Key Laboratory of Germplasm Selection and Breeding of Chinese Medicinal Materials, Nanchang, Jiangxi, China
| | - Qingqin Gan
- Jiangxi Provincial Institute of Traditional Chinese Medicine, Jiangxi Research Center for Protection and Development of Traditional Chinese Medicine Resources, Key Laboratory of Germplasm Selection and Breeding of Chinese Medicinal Materials, Nanchang, Jiangxi, China
| | - Jiang Long
- Jiangxi Provincial Institute of Traditional Chinese Medicine, Jiangxi Research Center for Protection and Development of Traditional Chinese Medicine Resources, Key Laboratory of Germplasm Selection and Breeding of Chinese Medicinal Materials, Nanchang, Jiangxi, China
| | - Haiyan Fan
- College of Life Sciences, Xinyang Normal University, Xinyang, China
| | - Xiaoqing Wang
- Jiangxi Provincial Institute of Traditional Chinese Medicine, Jiangxi Research Center for Protection and Development of Traditional Chinese Medicine Resources, Key Laboratory of Germplasm Selection and Breeding of Chinese Medicinal Materials, Nanchang, Jiangxi, China
| | - Zhilin Guan
- Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, Hubei, China
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Chen H, Ji H, Huang W, Zhang Z, Zhu K, Zhu S, Chai L, Ye J, Deng X. Transcription factor CrWRKY42 coregulates chlorophyll degradation and carotenoid biosynthesis in citrus. PLANT PHYSIOLOGY 2024; 195:728-744. [PMID: 38394457 DOI: 10.1093/plphys/kiae048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2023] [Accepted: 12/21/2023] [Indexed: 02/25/2024]
Abstract
Chlorophyll degradation and carotenoid biosynthesis, which occur almost simultaneously during fruit ripening, are essential for the coloration and nutritional value of fruits. However, the synergistic regulation of these 2 processes at the transcriptional level remains largely unknown. In this study, we identified a WRKY transcription factor, CrWRKY42, from the transcriptome data of the yellowish bud mutant "Jinlegan" ([Citrus unshiu × C. sinensis] × C. reticulata) tangor and its wild-type "Shiranui" tangor, which was involved in the transcriptional regulation of both chlorophyll degradation and carotenoid biosynthesis pathways. CrWRKY42 directly bound to the promoter of β-carotene hydroxylase 1 (CrBCH1) and activated its expression. The overexpression and interference of CrWRKY42 in citrus calli demonstrated that CrWRKY42 promoted carotenoid accumulation by inducing the expression of multiple carotenoid biosynthetic genes. Further assays confirmed that CrWRKY42 also directly bound to and activated the promoters of the genes involved in carotenoid biosynthesis, including phytoene desaturase (CrPDS) and lycopene β-cyclase 2 (CrLCYB2). In addition, CrWRKY42 could bind to the promoters of NONYELLOW COLORING (CrNYC) and STAY-GREEN (CrSGR) and activate their expression, thus promoting chlorophyll degradation. The overexpression and silencing of CrWRKY42 in citrus fruits indicated that CrWRKY42 positively regulated chlorophyll degradation and carotenoid biosynthesis by synergistically activating the expression of genes involved in both pathways. Our data revealed that CrWRKY42 acts as a positive regulator of chlorophyll degradation and carotenoid biosynthesis to alter the conversion of citrus fruit color. Our findings provide insight into the complex transcriptional regulation of chlorophyll and carotenoid metabolism during fruit ripening.
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Affiliation(s)
- Hongyan Chen
- National Key Laboratory for Germplasm Innovation and Utilization of Horticultural Crops, Huazhong Agricultural University, Wuhan 430070, P.R. China
- Hubei Hongshan Laboratory, Wuhan 430070, P.R. China
| | - Huiyu Ji
- National Key Laboratory for Germplasm Innovation and Utilization of Horticultural Crops, Huazhong Agricultural University, Wuhan 430070, P.R. China
| | - Wenkai Huang
- National Key Laboratory for Germplasm Innovation and Utilization of Horticultural Crops, Huazhong Agricultural University, Wuhan 430070, P.R. China
| | - Zhehui Zhang
- National Key Laboratory for Germplasm Innovation and Utilization of Horticultural Crops, Huazhong Agricultural University, Wuhan 430070, P.R. China
| | - Kaijie Zhu
- National Key Laboratory for Germplasm Innovation and Utilization of Horticultural Crops, Huazhong Agricultural University, Wuhan 430070, P.R. China
| | - Shiping Zhu
- National Citrus Engineering Research Center, Southwest University, Chongqing 400715, P.R. China
| | - Lijun Chai
- National Key Laboratory for Germplasm Innovation and Utilization of Horticultural Crops, Huazhong Agricultural University, Wuhan 430070, P.R. China
- Hubei Hongshan Laboratory, Wuhan 430070, P.R. China
| | - Junli Ye
- National Key Laboratory for Germplasm Innovation and Utilization of Horticultural Crops, Huazhong Agricultural University, Wuhan 430070, P.R. China
| | - Xiuxin Deng
- National Key Laboratory for Germplasm Innovation and Utilization of Horticultural Crops, Huazhong Agricultural University, Wuhan 430070, P.R. China
- Hubei Hongshan Laboratory, Wuhan 430070, P.R. China
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Tian S, Yang Y, Fang B, Uddin S, Liu X. The CrMYB33 transcription factor positively coordinate the regulation of both carotenoid accumulation and chlorophyll degradation in the peel of citrus fruit. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2024; 209:108540. [PMID: 38518398 DOI: 10.1016/j.plaphy.2024.108540] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2023] [Revised: 02/28/2024] [Accepted: 03/15/2024] [Indexed: 03/24/2024]
Abstract
Citrus, cultivated extensively across the globe, possesses considerable economic importance and nutritional value. With the degradation of chlorophyll and accumulation of carotenoids, mature citrus fruits develop an orange-yellow peel, enhancing fruit value and consumer preference. MYB transcription factors (TFs) exert a significant role in diverse plant developmental processes and investigating their involvement in fruit coloration is crucial for developing new cultivars. This work aimed to characterize a citrus TF, CrMYB33, whose expression was found to be positively correlated with carotenoid biosynthesis during fruit ripening. The interference of CrMYB33 expression in citrus fruit resulted in inhibition of carotenoid accumulation, down-regulation of carotenoid biosynthetic genes, and a slower rate of chlorophyll degradation. Conversely, overexpression of CrMYB33 in tomato (Solanum lycopersicum) enhanced chlorophyll degradation and carotenoid biosynthesis, resulting in a deeper red coloration of the fruits. Furthermore, the transcription of associated genes was upregulated in CrMYB33-overexpressing tomato fruits. Additional assays reveal that CrMYB33 exhibits direct links and activation of the promoters of lycopene β-cyclase 2 (CrLCYb2), and β-carotene hydroxylases 2 (CrBCH2), both crucial genes in the carotenoid biosynthetic pathway. Additionally, it was found to inhibit chlorophyllase (CrCLH), a gene essential in chlorophyll degradation. These findings provide insight into the observed changes in LCYb2, BCH2, and CLH expression in the transgenic lines under investigation. In conclusion, our study revealed that CrMYB33 modulates carotenoid accumulation and chlorophyll degradation in citrus fruits through transcriptionally activating genes involved in metabolic pathways.
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Affiliation(s)
- Shulin Tian
- College of Horticulture and Landscape Architecture, Southwest University, Chongqing, 400715, China; Key Laboratory of Agricultural Biosafety and Green Production of Upper Yangtze River (Ministry of Education), Southwest University, Chongqing, 400715, China
| | - Yuyan Yang
- College of Horticulture and Landscape Architecture, Southwest University, Chongqing, 400715, China
| | - Bo Fang
- Chongqing Academy of Agricultural Sciences, Chongqing, 401329, China
| | - Saleem Uddin
- College of Horticulture and Landscape Architecture, Southwest University, Chongqing, 400715, China
| | - Xiaogang Liu
- College of Horticulture and Landscape Architecture, Southwest University, Chongqing, 400715, China; Key Laboratory of Agricultural Biosafety and Green Production of Upper Yangtze River (Ministry of Education), Southwest University, Chongqing, 400715, China.
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Zhang R, Rao S, Wang Y, Qin Y, Qin K, Chen J. Chromosome Doubling Enhances Biomass and Carotenoid Content in Lycium chinense. PLANTS (BASEL, SWITZERLAND) 2024; 13:439. [PMID: 38337972 PMCID: PMC10857560 DOI: 10.3390/plants13030439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2023] [Revised: 01/26/2024] [Accepted: 01/30/2024] [Indexed: 02/12/2024]
Abstract
Lycium chinense, a type of medicinal and edible plant, is rich in bioactive compounds beneficial to human health. In order to meet the market requirements for the yield and quality of L. chinense, polyploid induction is usually an effective way to increase plant biomass and improve the content of bioactive components. This study established the most effective tetraploid induction protocol by assessing various preculture durations, colchicine concentrations, and exposure times. The peak tetraploid induction efficacy, 18.2%, was achieved with a 12-day preculture and 24-h exposure to 50 mg L-1 colchicine. Compared to diploids, tetraploids exhibited potentially advantageous characteristics such as larger leaves, more robust stems, and faster growth rates. Physiologically, tetraploids demonstrated increased stomatal size and chloroplast count in stomata but reduced stomatal density. Nutrient analysis revealed a substantial increase in polysaccharides, calcium, iron, and zinc in tetraploid leaves. In addition, seventeen carotenoids were identified in the leaves of L. chinense. Compared to the diploid, lutein, β-carotene, neoxanthin, violaxanthin, and (E/Z)-phytoene exhibited higher levels in tetraploid strains T39 and T1, with T39 demonstrating a greater accumulation than T1. The findings suggest that the generated tetraploids harbor potential for further exploitation and lay the foundation for the selection and breeding of novel genetic resources of Lycium.
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Affiliation(s)
- Runan Zhang
- State Key Laboratory of Efficient Production of Forest Resources, National Engineering Research Center of Tree Breeding and Ecological Restoration, College of Biological Sciences and Technology, Beijing Forestry University, Beijing 100083, China; (R.Z.); (S.R.); (Y.W.); (Y.Q.)
| | - Shupei Rao
- State Key Laboratory of Efficient Production of Forest Resources, National Engineering Research Center of Tree Breeding and Ecological Restoration, College of Biological Sciences and Technology, Beijing Forestry University, Beijing 100083, China; (R.Z.); (S.R.); (Y.W.); (Y.Q.)
| | - Yuchang Wang
- State Key Laboratory of Efficient Production of Forest Resources, National Engineering Research Center of Tree Breeding and Ecological Restoration, College of Biological Sciences and Technology, Beijing Forestry University, Beijing 100083, China; (R.Z.); (S.R.); (Y.W.); (Y.Q.)
| | - Yingzhi Qin
- State Key Laboratory of Efficient Production of Forest Resources, National Engineering Research Center of Tree Breeding and Ecological Restoration, College of Biological Sciences and Technology, Beijing Forestry University, Beijing 100083, China; (R.Z.); (S.R.); (Y.W.); (Y.Q.)
| | - Ken Qin
- National Wolfberry Engineering Research Center, Ningxia Academy of Agriculture and Forestry Sciences, Yinchuan 750002, China;
| | - Jinhuan Chen
- State Key Laboratory of Efficient Production of Forest Resources, National Engineering Research Center of Tree Breeding and Ecological Restoration, College of Biological Sciences and Technology, Beijing Forestry University, Beijing 100083, China; (R.Z.); (S.R.); (Y.W.); (Y.Q.)
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