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Wang K, Li J, Wang Y, Xu L, Cui F, Mei Y, Ying J, Li B, Zhang X, Ma S, Wang R, Liao N, Liu L. RsKNAT3 Interacts Antagonistically With RsKNAT1 to Confer Thermotolerance by Regulating RsDREB2A Transcription in Radish. PLANT, CELL & ENVIRONMENT 2025. [PMID: 40396544 DOI: 10.1111/pce.15619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2024] [Revised: 05/01/2025] [Accepted: 05/02/2025] [Indexed: 05/22/2025]
Abstract
Knotted1-like homeobox (KNOX) transcription factors (TFs) are widely involved in plant growth and development processes, including shoot apical meristem division and leaf and root organ development. However, the critical roles of KNOXs in response to abiotic stress, especially heat stress (HS), remain largely unexplored in plants. In this study, both the transcriptome and RT-qPCR analysis revealed that two KNOX TFs, RsKNAT1 and RsKNAT3, were significantly responsive to HS in radish (Raphanus sativus L.). RsKNAT3, highly expressed in heat-tolerant genotypes, enhances thermotolerance and ROS scavenging, acting as a transcriptional activator. Conversely, RsKNAT1, elevated in heat-susceptible genotypes, negatively regulates thermotolerance and increases ROS accumulation, functioning as a repressor. Interestingly, the RsKNAT1 interacts with RsKNAT3 by forming a heterodimer. The identification of regulatory elements showed that RsKNAT3 bound to the Knotted I binding site and activate RsDREB2A expression, while RsKNAT1 acts as the specific repressor of RsKNAT3 and inhibits the regulation of RsKNAT3-targeted RsDREB2A under HS. These findings provided insights into the regulatory mechanism underlying thermotolerance mediated by RsKNAT3 interacting antagonistically with RsKNAT1, facilitating the genetically improvement of the heat tolerance in radish breeding programs.
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Affiliation(s)
- Kai Wang
- National Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (East China) of MOAR, College of Horticulture, Zhongshan Biological Breeding Laboratory, Nanjing Agricultural University, Nanjing, China
| | - Jingxue Li
- National Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (East China) of MOAR, College of Horticulture, Zhongshan Biological Breeding Laboratory, Nanjing Agricultural University, Nanjing, China
| | - Yan Wang
- National Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (East China) of MOAR, College of Horticulture, Zhongshan Biological Breeding Laboratory, Nanjing Agricultural University, Nanjing, China
| | - Liang Xu
- National Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (East China) of MOAR, College of Horticulture, Zhongshan Biological Breeding Laboratory, Nanjing Agricultural University, Nanjing, China
| | - Feng Cui
- College of Horticulture and Landscape Architecture, Yangzhou University, Yangzhou, China
| | - Yi Mei
- Jiangsu Coastal Area Institute of Agricultural Sciences, Yancheng, China
| | - Jiali Ying
- National Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (East China) of MOAR, College of Horticulture, Zhongshan Biological Breeding Laboratory, Nanjing Agricultural University, Nanjing, China
| | - Bingshuang Li
- National Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (East China) of MOAR, College of Horticulture, Zhongshan Biological Breeding Laboratory, Nanjing Agricultural University, Nanjing, China
| | - Xiaoli Zhang
- National Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (East China) of MOAR, College of Horticulture, Zhongshan Biological Breeding Laboratory, Nanjing Agricultural University, Nanjing, China
| | - Shilin Ma
- National Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (East China) of MOAR, College of Horticulture, Zhongshan Biological Breeding Laboratory, Nanjing Agricultural University, Nanjing, China
| | - Ruixuan Wang
- National Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (East China) of MOAR, College of Horticulture, Zhongshan Biological Breeding Laboratory, Nanjing Agricultural University, Nanjing, China
| | - Nannan Liao
- National Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (East China) of MOAR, College of Horticulture, Zhongshan Biological Breeding Laboratory, Nanjing Agricultural University, Nanjing, China
| | - Liwang Liu
- National Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (East China) of MOAR, College of Horticulture, Zhongshan Biological Breeding Laboratory, Nanjing Agricultural University, Nanjing, China
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He X, Zheng Y, Yang S, Wang Y, Lin Y, Jiang B, Xie D, Liu W, Peng Q, Zuo J, Wang M. Combined genomic, transcriptomic, and metabolomic analyses provide insights into the fruit development of bottle gourd ( Lagenaria siceraria). HORTICULTURE RESEARCH 2025; 12:uhae335. [PMID: 40051576 PMCID: PMC11883228 DOI: 10.1093/hr/uhae335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/11/2024] [Accepted: 11/20/2024] [Indexed: 03/09/2025]
Abstract
Bottle gourd (Lagenaria siceraria (Molina) Standl) is a widely distributed Cucurbitaceae species, but gaps and low-quality assemblies have limited its genomic study. To address this, we assembled a nearly complete, high-quality genome of the bottle gourd (Pugua) using PacBio HiFi sequencing and Hi-C correction. The genome, being 298.67 Mb long with a ContigN50 of 28.55 Mb, was identified to possess 11 chromosomes, 11 centromeres, 18 telomeres, and 24 439 predicted protein-coding genes; notably, gap-free telomere-to-telomere assembly was accomplished for seven chromosomes. Based on the Pugua genome, the transcriptomic and metabolomic combined analyses revealed that amino acids and lipids accumulate during the expansion stage, while sugars and terpenoids increase during ripening. GA4 and genes of the Aux/IAA family mediate fruit expansion and maturation, while cell wall remodeling is regulated by factors such as XTHs, EXPs, polyphenols, and alkaloids, contributing to environmental adaptation. GGAT2 was positively correlated with glutamate, a source of umami, and SUS5 and SPS4 expression aligned with sucrose accumulation. This study provides a valuable genetic resource for bottle gourd research, enhancing the understanding of Cucurbitaceae evolution and supporting further studies on bottle gourd development, quality, and genetic improvement.
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Affiliation(s)
- Xuelian He
- Institute of Agri-food Processing and Nutrition, Beijing Academy of Agricultural and Forestry Sciences, Beijing Key Laboratory of Fruits and Vegetable Storage and Processing, Key Laboratory of Vegetable Postharvest Processing of Ministry of Agriculture and Rural Areas, State Key Laboratory of Vegetable Biobreeding, Beijing Vegetable Research Center, Beijing Academy of Agriculture and Forestry Science, Beijing 100097, China
- Beijing Engineering and Technology Research Center of Food Additives, Beijing Advanced Innovation Center for Food Nutrition and Human Health, School of Food and Health, Beijing Technology and Business University (BTBU), Beijing 100048, China
| | - Yanyan Zheng
- Institute of Agri-food Processing and Nutrition, Beijing Academy of Agricultural and Forestry Sciences, Beijing Key Laboratory of Fruits and Vegetable Storage and Processing, Key Laboratory of Vegetable Postharvest Processing of Ministry of Agriculture and Rural Areas, State Key Laboratory of Vegetable Biobreeding, Beijing Vegetable Research Center, Beijing Academy of Agriculture and Forestry Science, Beijing 100097, China
| | - Songguang Yang
- Vegetable Research Institute, Guangdong Academy of Agricultural Sciences/ Guangdong Key Laboratory for New Technology Research of Vegetables, Guangzhou 510640, China
| | - Ying Wang
- Institute of Vegetables, Zhejiang Academy of Agricultural Sciences, Hangzhou 310012, China
| | - Yu'e Lin
- Vegetable Research Institute, Guangdong Academy of Agricultural Sciences/ Guangdong Key Laboratory for New Technology Research of Vegetables, Guangzhou 510640, China
| | - Biao Jiang
- Vegetable Research Institute, Guangdong Academy of Agricultural Sciences/ Guangdong Key Laboratory for New Technology Research of Vegetables, Guangzhou 510640, China
| | - Dasen Xie
- Vegetable Research Institute, Guangdong Academy of Agricultural Sciences/ Guangdong Key Laboratory for New Technology Research of Vegetables, Guangzhou 510640, China
| | - Wenrui Liu
- Vegetable Research Institute, Guangdong Academy of Agricultural Sciences/ Guangdong Key Laboratory for New Technology Research of Vegetables, Guangzhou 510640, China
| | - Qingwu Peng
- Vegetable Research Institute, Guangdong Academy of Agricultural Sciences/ Guangdong Key Laboratory for New Technology Research of Vegetables, Guangzhou 510640, China
| | - Jinhua Zuo
- Institute of Agri-food Processing and Nutrition, Beijing Academy of Agricultural and Forestry Sciences, Beijing Key Laboratory of Fruits and Vegetable Storage and Processing, Key Laboratory of Vegetable Postharvest Processing of Ministry of Agriculture and Rural Areas, State Key Laboratory of Vegetable Biobreeding, Beijing Vegetable Research Center, Beijing Academy of Agriculture and Forestry Science, Beijing 100097, China
| | - Min Wang
- Vegetable Research Institute, Guangdong Academy of Agricultural Sciences/ Guangdong Key Laboratory for New Technology Research of Vegetables, Guangzhou 510640, China
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Han X, Song C, Fang S, Wei Y, Tian J, Zheng X, Jiao J, Wang M, Zhang K, Hao P, Wu G, Bai T. Systematic identification and analysis of the HSP70 genes reveals MdHSP70-38 enhanced salt tolerance in transgenic tobacco and apple. Int J Biol Macromol 2025; 289:138943. [PMID: 39701234 DOI: 10.1016/j.ijbiomac.2024.138943] [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: 09/26/2024] [Revised: 12/02/2024] [Accepted: 12/17/2024] [Indexed: 12/21/2024]
Abstract
Heat shock protein 70 (HSP70) is a class of important molecular chaperones that are involved in protein folding, stabilization, and maturation, and play a vital role in plant growth and response to environmental stress. Apple trees frequently suffer from different-degree salt stress, which seriously affects their growth, quality, and yield. However, whether HSP70 genes are involved in salt tolerance is unexplored in apple. In this study, 67 MdHSP70 genes were identified and unevenly distributed on 17 apple chromosomes. Gene structure and protein motif analysis revealed that MdHSP70 genes in the same subgroup have similar intron phase and motif organization, further supporting the phylogenetic results. RNA-seq analysis showed the expression level of nine of 67 MdHSP70 genes was induced by salt stress. Subsequent qRT-PCR analysis revealed that MdHSP70-38 was dramatically up-regulated in response to salt stress. The overexpression of MdHSP70-38 in transgenic tobacco and apple improved salt stress tolerance, which was associated with less electrolyte leakage and malondialdehyde (MDA), as well as diminished accumulation of hydrogen peroxide (H2O2) and superoxide radicals (O2-). Our findings demonstrated that MdHSP70-38 played a positive regulatory role in salt tolerance in tobacco and apple, and provided a promising candidate gene in genetic applications for improving salt tolerance.
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Affiliation(s)
- Xuanxuan Han
- College of Horticulture, Henan Agricultural University, Zhengzhou 450046, China
| | - Chunhui Song
- College of Horticulture, Henan Agricultural University, Zhengzhou 450046, China
| | - Sen Fang
- College of Horticulture, Henan Agricultural University, Zhengzhou 450046, China
| | - Yuyao Wei
- College of Horticulture, Henan Agricultural University, Zhengzhou 450046, China
| | - Jianwen Tian
- College of Horticulture, Henan Agricultural University, Zhengzhou 450046, China
| | - Xianbo Zheng
- College of Horticulture, Henan Agricultural University, Zhengzhou 450046, China
| | - Jian Jiao
- College of Horticulture, Henan Agricultural University, Zhengzhou 450046, China
| | - Miaomiao Wang
- College of Horticulture, Henan Agricultural University, Zhengzhou 450046, China
| | - Kunxi Zhang
- College of Horticulture, Henan Agricultural University, Zhengzhou 450046, China
| | - Pengbo Hao
- College of Horticulture, Henan Agricultural University, Zhengzhou 450046, China
| | - Guoliang Wu
- College of Horticulture, Henan Agricultural University, Zhengzhou 450046, China.
| | - Tuanhui Bai
- College of Horticulture, Henan Agricultural University, Zhengzhou 450046, China.
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Cantila AY, Chen S, Siddique KHM, Cowling WA. Heat shock responsive genes in Brassicaceae: genome-wide identification, phylogeny, and evolutionary associations within and between genera. Genome 2024; 67:464-481. [PMID: 39412080 DOI: 10.1139/gen-2024-0061] [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] [Indexed: 12/02/2024]
Abstract
Heat stress affects the growth and development of Brassicaceae crops. Plant breeders aim to mitigate the effects of heat stress by selecting for heat stress tolerance, but the genes responsible for heat stress in Brassicaceae remain largely unknown. During heat stress, heat shock proteins (HSPs) function as molecular chaperones to aid in protein folding, and heat shock transcription factors (HSFs) serve as transcriptional regulators of HSP expression. We identified 5002 heat shock related genes, including HSPs and HSFs, across 32 genomes in Brassicaceae. Among these, 3347 genes were duplicated, with segmented duplication primarily contributing to their expansion. We identified 466 physical gene clusters, including 240 homogenous clusters and 226 heterogeneous clusters, shedding light on the organization of heat shock related genes. Notably, 37 genes were co-located with published thermotolerance quantitative trait loci, which supports their functional role in conferring heat stress tolerance. This study provides a comprehensive resource for the identification of functional Brassicaceae heat shock related genes, elucidates their clustering and duplication patterns and establishes the genomic foundation for future heat tolerance research. We hypothesise that genetic variants in HSP and HSF genes in certain species have potential for improving heat stress tolerance in Brassicaceae crops.
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Affiliation(s)
- Aldrin Y Cantila
- The UWA Institute of Agriculture, The University of Western Australia, Perth, WA 6000, Australia
| | - Sheng Chen
- The UWA Institute of Agriculture, The University of Western Australia, Perth, WA 6000, Australia
| | - Kadambot H M Siddique
- The UWA Institute of Agriculture, The University of Western Australia, Perth, WA 6000, Australia
| | - Wallace A Cowling
- The UWA Institute of Agriculture, The University of Western Australia, Perth, WA 6000, Australia
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Li X, Zhu M. Genome-wide identification of the Hsp70 gene family in Penaeus chinensis and their response to environmental stress. Anim Biotechnol 2024; 35:2344205. [PMID: 38651890 DOI: 10.1080/10495398.2024.2344205] [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] [Indexed: 04/25/2024]
Abstract
The heat shock protein 70 (HSP70) gene family plays a crucial role in the response of organisms to environmental stress. However, it has not been systematically characterized in shrimp. In this study, we identified 25 PcHsp70 genes in the Penaeus chinensis genome. The encoded proteins were categorized into six subgroups based on phylogenetic relationships. Tandem duplication was the main driver of amplification in the PcHsp70 family, and the genes have experienced strong purifying selection during evolution. Transcriptome data analysis revealed that the 25 PcHsp70 members have different expression patterns in shrimp under conditions of low temperature, low salinity, and white spot syndrome virus infection. Among them, PcHsp70.11 was significantly induced under all three stress conditions, suggesting that this gene plays an important role in response to environmental stress in P. chinensis. To the best of our knowledge, this is the first study to systematically analyze the Hsp70 gene family in shrimp. The results provide important information on shrimp Hsp70s, contributing to a better understanding of the role of these genes in environmental stress and providing a basis for further functional studies.
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Affiliation(s)
- Xinran Li
- School of Biological Science and Technology, Liupanshui Normal University, Liupanshui, China
| | - Miao Zhu
- School of Biological Science and Technology, Liupanshui Normal University, Liupanshui, China
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Liu M, Bian Z, Shao M, Feng Y, Ma W, Liang G, Mao J. Expression analysis of the apple HSP70 gene family in abiotic stress and phytohormones and expression validation of candidate MdHSP70 genes. Sci Rep 2024; 14:23975. [PMID: 39402100 PMCID: PMC11473515 DOI: 10.1038/s41598-024-73368-x] [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: 04/04/2024] [Accepted: 09/17/2024] [Indexed: 10/17/2024] Open
Abstract
Heat shock protein 70 (HSP70) is one kind of molecular chaperones which are widely found in organisms, and its members are highly conserved among each other, with important roles in plant growth and development. In this study, 56 HSP70 genes were identified from the apple genome database. Analysis of gene duplication events showed that tandem and segmental duplication events play an important role in promoting the amplification of the MdHSP70 gene family. Collinearity analysis showed that HSP70 family members of apple were more closely related to HSP70 family members of Arabidopsis, tomato and soybean. The promoter region of the apple HSP70 genes contains a large number of cis-acting elements in response to hormones and stress. Tissue-specific expression analysis showed that some of the genes were associated with various stages of the apple growth process. Codon preference analysis showed small differences between codon bases 1 and 3 in the apple HSP70 genome, and the codon base composition had a small effect on codon usage preference. The multiple expression patterns of the MdHSP70 gene suggested that MdHSP70 gene members play important roles in growth and development and in response to hormonal and abiotic stresses. The yeast two-hybrid (Y2H) demonstrated that MdHSP70-53 interacts with MdDVH24_032563. The qRT-PCR analysis showed that most MdHSP70 members' hormonal and abiotic stresses (MdHSP70-6, MdHSP70-26 and MdHSP70-45) appeared to be highly expressed. To further elucidate the function of MdHSP70 (6, 26, 45), we introduced them into tobacco to confirm subcellular locations and noted that these genes are located in the cytoplasm and cell membrane. This study serves as a theoretical basis for further studies of the MdHSP70 gene and helps to further investigate the functional characterization of MdHSP70 gene.
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Affiliation(s)
- Ming Liu
- College of Horticulture, Gansu Agricultural University, Lanzhou, 730070, China
| | - Zhiyuan Bian
- College of Horticulture, Gansu Agricultural University, Lanzhou, 730070, China
| | - Miao Shao
- College of Horticulture, Gansu Agricultural University, Lanzhou, 730070, China
| | - Yongqing Feng
- College of Horticulture, Gansu Agricultural University, Lanzhou, 730070, China
| | - Weifeng Ma
- College of Horticulture, Gansu Agricultural University, Lanzhou, 730070, China
| | - Guoping Liang
- College of Horticulture, Gansu Agricultural University, Lanzhou, 730070, China
| | - Juan Mao
- College of Horticulture, Gansu Agricultural University, Lanzhou, 730070, China.
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Ren W, Ding B, Dong W, Yue Y, Long X, Zhou Z. Unveiling HSP40/60/70/90/100 gene families and abiotic stress response in Jerusalem artichoke. Gene 2024; 893:147912. [PMID: 37863300 DOI: 10.1016/j.gene.2023.147912] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Revised: 09/28/2023] [Accepted: 10/17/2023] [Indexed: 10/22/2023]
Abstract
Heat shock proteins (HSPs) are essential for plant growth, development, and stress adaptation. However, their roles in Jerusalem artichoke are largely unexplored. Using bioinformatics, we classified 143 HSP genes into distinct families: HSP40 (82 genes), HSP60 (22 genes), HSP70 (29 genes), HSP90 (6 genes), and HSP100 (4 genes). Our analysis covered their traits, evolution, and structures. Using RNA-seq data, we uncovered unique expression patterns of these HSP genes across growth stages and tissues. Notably, HSP40, HSP60, HSP70, HSP90, and HSP100 families each had specific roles. We also studied how these gene families responded to various stresses, from extreme temperatures to drought and salinity, revealing intricate expression dynamics. Remarkably, HSP40 showed remarkable flexibility, while HSP60, HSP70, HSP90, and HSP100 responded specifically to stress types. Moreover, our analysis unveiled significant correlations between gene pairs under stress, implying cooperative interactions. qRT-PCR validation underscored the significance of particular genes such as HtHSP60-7, HtHSP90-5, HtHSP100-2, and HtHSP100-3 in responding to stress. In summary, our study advances the understanding of how HSP gene families collectively manage stresses in Jerusalem artichoke. This provides insights into specific gene functions and broader plant stress responses.
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Affiliation(s)
- Wencai Ren
- College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Baishui Ding
- College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Wenhan Dong
- College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Yang Yue
- College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Xiaohua Long
- College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Zhaosheng Zhou
- College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China.
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Zhang X, Ma Y, Lai D, He M, Zhang X, Zhang W, Ji M, Zhu Y, Wang Y, Liu L, Xu L. RsPDR8, a member of ABCG subfamily, plays a positive role in regulating cadmium efflux and tolerance in radish (Raphanus sativus L.). PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2023; 205:108149. [PMID: 37939545 DOI: 10.1016/j.plaphy.2023.108149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Revised: 10/16/2023] [Accepted: 10/27/2023] [Indexed: 11/10/2023]
Abstract
Radish (Raphanus sativus L.) is one of the most vital root vegetable crops worldwide. Cadmium (Cd), a non-essential and toxic heavy metal, can dramatically restrict radish taproot quality and safety. Although the Peiotrpic Drug Resistance (PDR) genes play crucial roles in heavy metal accumulation and transport in plants, the systematic identification and functional characterization of RsPDRs remain largely unexplored in radish. Herein, a total of 19 RsPDR genes were identified from the radish genome. A few RsPDRs, including RsPDR1, RsPDR8 and RsPDR12, showed significant differential expression under Cd and lead (Pb) stress in the 'NAU-YH' genotype. Interestingly, the plasma membrane-localized RsPDR8 exhibited significantly up-regulated expression and enhanced promoter activity under Cd exposure. Ectopic expression of RsPDR8 conferred Cd tolerance via reducing Cd accumulation in yeast cells. Moreover, the transient transformation of RsPDR8 revealed that it positively regulated Cd tolerance by promoting ROS scavenging and enhancing membrane permeability in radish. In addition, overexpression of RsPDR8 increased root elongation but deceased Cd accumulation compared with the WT plants in Arabidopsis, demonstrating that it could play a positive role in mediating Cd efflux and tolerance in plants. Together, these results would facilitate deciphering the molecular mechanism underlying RsPDR8-mediated Cd tolerance and detoxification in radish.
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Affiliation(s)
- Xinyu Zhang
- National Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Key Laboratory of Horticultural Crop Biology and Genetic Improvement (East China) of MOAR, College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, PR China
| | - Yingfei Ma
- National Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Key Laboratory of Horticultural Crop Biology and Genetic Improvement (East China) of MOAR, College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, PR China
| | - Deqiang Lai
- Cangzhou Academy of Agriculture and Forestry Sciences, Cangzhou, 061001, PR China
| | - Min He
- National Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Key Laboratory of Horticultural Crop Biology and Genetic Improvement (East China) of MOAR, College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, PR China
| | - Xiaoli Zhang
- National Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Key Laboratory of Horticultural Crop Biology and Genetic Improvement (East China) of MOAR, College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, PR China
| | - Weilan Zhang
- National Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Key Laboratory of Horticultural Crop Biology and Genetic Improvement (East China) of MOAR, College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, PR China
| | - Mingmei Ji
- Cangzhou Academy of Agriculture and Forestry Sciences, Cangzhou, 061001, PR China
| | - Yuelin Zhu
- National Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Key Laboratory of Horticultural Crop Biology and Genetic Improvement (East China) of MOAR, College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, PR China
| | - Yan Wang
- National Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Key Laboratory of Horticultural Crop Biology and Genetic Improvement (East China) of MOAR, College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, PR China
| | - Liwang Liu
- National Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Key Laboratory of Horticultural Crop Biology and Genetic Improvement (East China) of MOAR, College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, PR China; College of Horticulture and Landscape Architecture, Yangzhou University, Yangzhou, 225009, PR China
| | - Liang Xu
- National Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Key Laboratory of Horticultural Crop Biology and Genetic Improvement (East China) of MOAR, College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, PR China.
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