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Wu X, Jia Y, Ma Q, Wang T, Xu J, Chen H, Wang M, Song H, Cao S. The transcription factor bZIP44 cooperates with MYB10 and MYB72 to regulate the response of Arabidopsis thaliana to iron deficiency stress. THE NEW PHYTOLOGIST 2024; 242:2586-2603. [PMID: 38523234 DOI: 10.1111/nph.19706] [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: 08/28/2023] [Accepted: 03/09/2024] [Indexed: 03/26/2024]
Abstract
Nicotianamine (NA) plays a crucial role in transporting metal ions, including iron (Fe), in plants; therefore, NICOTIANAMINE SYNTHASE (NAS) genes, which control NA synthesis, are tightly regulated at the transcriptional level. However, the transcriptional regulatory mechanisms of NAS genes require further investigations. In this study, we determined the role of bZIP44 in mediating plant response to Fe deficiency stress by conducting transformation experiments and assays. bZIP44 positively regulated the response of Arabidopsis to Fe deficiency stress by interacting with MYB10 and MYB72 to enhance their abilities to bind at NAS2 and NAS4 promoters, thereby increasing NAS2 and NAS4 transcriptional levels and promote NA synthesis. In summary, the transcription activities of bZIP44, MYB10, and MYB72 were induced in response to Fe deficiency stress, which enhanced the interaction between bZIP44 and MYB10 or MYB72 proteins, synergistically activated the transcriptional activity of NAS2 and NAS4, promoted NA synthesis, and improved Fe transport, thereby enhancing plant tolerance to Fe deficiency stress.
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Affiliation(s)
- Xi Wu
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, 230009, China
| | - Yafeng Jia
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, 230009, China
| | - Qian Ma
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, 230009, China
| | - Tingting Wang
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, 230009, China
| | - Jiena Xu
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, 230009, China
| | - Hongli Chen
- Anhui Society for Horticultural Science, Anhui Academy of Agricultural Sciences, Hefei, 230031, China
| | - Mingxia Wang
- Institute of Horticulture, Anhui Academy of Agricultural Sciences, Hefei, 230031, China
| | - Hui Song
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, 230009, China
| | - Shuqing Cao
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, 230009, China
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Ning X, Lin M, Huang G, Mao J, Gao Z, Wang X. Research progress on iron absorption, transport, and molecular regulation strategy in plants. FRONTIERS IN PLANT SCIENCE 2023; 14:1190768. [PMID: 37465388 PMCID: PMC10351017 DOI: 10.3389/fpls.2023.1190768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Accepted: 05/04/2023] [Indexed: 07/20/2023]
Abstract
Iron is a trace element essential for normal plant life activities and is involved in various metabolic pathways such as chlorophyll synthesis, photosynthesis, and respiration. Although iron is highly abundant in the earth's crust, the amount that can be absorbed and utilized by plants is very low. Therefore, plants have developed a series of systems for absorption, transport, and utilization in the course of long-term evolution. This review focuses on the findings of current studies of the Fe2+ absorption mechanism I, Fe3+ chelate absorption mechanism II and plant-microbial interaction iron absorption mechanism, particularly effective measures for artificially regulating plant iron absorption and transportation to promote plant growth and development. According to the available literature, the beneficial effects of using microbial fertilizers as iron fertilizers are promising but further evidence of the interaction mechanism between microorganisms and plants is required.
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Affiliation(s)
- Xinyi Ning
- Institute of Biological Resources, Jiangxi Academy of Sciences, Nanchang, China
- College of Environmental And Chemical Engineering, Nanchang Hangkong University, Nanchang, China
- Kiwifruit Engineering Research Center of Jiangxi Province, Nanchang, China
| | - Mengfei Lin
- Institute of Biological Resources, Jiangxi Academy of Sciences, Nanchang, China
- Kiwifruit Engineering Research Center of Jiangxi Province, Nanchang, China
| | - Guohua Huang
- Institute of Biological Resources, Jiangxi Academy of Sciences, Nanchang, China
- College of Environmental And Chemical Engineering, Nanchang Hangkong University, Nanchang, China
- Kiwifruit Engineering Research Center of Jiangxi Province, Nanchang, China
| | - Jipeng Mao
- Institute of Biological Resources, Jiangxi Academy of Sciences, Nanchang, China
- Kiwifruit Engineering Research Center of Jiangxi Province, Nanchang, China
| | - Zhu Gao
- Institute of Biological Resources, Jiangxi Academy of Sciences, Nanchang, China
- Kiwifruit Engineering Research Center of Jiangxi Province, Nanchang, China
- JInstitute of Biotechnology, Jiangxi Academy of Sciences, Ji’an, Jiangxi, China
| | - Xiaoling Wang
- Institute of Biological Resources, Jiangxi Academy of Sciences, Nanchang, China
- Kiwifruit Engineering Research Center of Jiangxi Province, Nanchang, China
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Osman MEM, Osman RSH, Elmubarak SA, Dirar AI, Konozy EHE. Phoenix dactylifera (date palm; Arecaceae) putative lectin homologs: Genome-wide search, architecture analysis, and evolutionary relationship. Saudi J Biol Sci 2023; 30:103676. [PMID: 37213699 PMCID: PMC10197109 DOI: 10.1016/j.sjbs.2023.103676] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2023] [Revised: 04/10/2023] [Accepted: 04/27/2023] [Indexed: 05/23/2023] Open
Abstract
The date palm, Phoenix dactylifera, is a vital crop in nations in the Middle East and North Africa. The date palm was thought to have outstanding traditional medicinal value because it was abundant in phytochemicals with diverse chemical structures. The date palm's ability to withstand harsh environments could be partly attributed to a class of proteins known as lectins, which are carbohydrate-binding proteins that can bind sugar moieties reversibly and without changing their chemical structures. After scanning the genome of P. dactylifera (GCF 009389715.1), this in silico study discovered 196 possible lectin homologs from 11 different families, some specific to plants. At the same time, others could also be found in other kingdoms of life. Their domain architectures and functional amino acid residues were investigated, and they yielded a 40% true-lectin with known conserved carbohydrate-binding residues. Further, their probable subcellular localization, physiochemical and phylogenetic analyses were also performed. Scanning all putative lectin homologs against the anticancer peptide (ACP) dataset found in the AntiCP2.0 webpage identified 26 genes with protein kinase receptors (Lec-KRs) belonging to 5 lectin families, which are reported to have at least one ACP motif. Our study offers the first account of Phoenix-lectins and their organization that can be used for further structural and functional analysis and investigating their potential as anticancer proteins.
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Affiliation(s)
| | | | - Sara A.A Elmubarak
- Department of Biotechnology, Africa City of Technology (ACT), Khartoum, Sudan
| | - Amina I. Dirar
- Medicinal, Aromatic Plants and Traditional Medicine Research Institute (MAPTRI), National Center for Research, Mek Nimr Street, Khartoum, Sudan
| | - Emadeldin Hassan E. Konozy
- Department of Biotechnology, Africa City of Technology (ACT), Khartoum, Sudan
- Pharmaceutical Research and Development, Centre Faculty of Pharmacy, Karary University, Omdurman, Khartoum State, Sudan
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Guo G, Yu T, Zhang H, Chen M, Dong W, Zhang S, Tang X, Liu L, Heng W, Zhu L, Jia B. Evidence That PbrSAUR72 Contributes to Iron Deficiency Tolerance in Pears by Facilitating Iron Absorption. PLANTS (BASEL, SWITZERLAND) 2023; 12:plants12112173. [PMID: 37299155 DOI: 10.3390/plants12112173] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2023] [Revised: 05/24/2023] [Accepted: 05/25/2023] [Indexed: 06/12/2023]
Abstract
Iron is an essential trace element for plants; however, low bioactive Fe in soil continuously places plants in an Fe-deficient environment, triggering oxidative damage. To cope with this, plants make a series of alterations to increase Fe acquisition; however, this regulatory network needs further investigation. In this study, we found notably decreased indoleacetic acid (IAA) content in chlorotic pear (Pyrus bretschneideri Rehd.) leaves caused by Fe deficiency. Furthermore, IAA treatment slightly induced regreening by increasing chlorophyll synthesis and Fe2+ accumulation. At that point, we identified PbrSAUR72 as a key negative effector output of auxin signaling and established its close relationship to Fe deficiency. Furthermore, the transient PbrSAUR72 overexpression could form regreening spots with increased IAA and Fe2+ content in chlorotic pear leaves, whereas its transient silencing does the opposite in normal pear leaves. In addition, cytoplasm-localized PbrSAUR72 exhibits root expression preferences and displays high homology to AtSAUR40/72. This promotes salt tolerance in plants, indicating a putative role for PbrSAUR72 in abiotic stress responses. Indeed, transgenic plants of Solanum lycopersicum and Arabidopsis thaliana overexpressing PbrSAUR72 displayed less sensitivity to Fe deficiency, accompanied by substantially elevated expression of Fe-induced genes, such as FER/FIT, HA, and bHLH39/100. These result in higher ferric chelate reductase and root pH acidification activities, thereby hastening Fe absorption in transgenic plants under an Fe-deficient condition. Moreover, the ectopic overexpression of PbrSAUR72 inhibited reactive oxygen species production in response to Fe deficiency. These findings contribute to a new understanding of PbrSAURs and its involvement in Fe deficiency, providing new insights for the further study of the regulatory mechanisms underlying the Fe deficiency response.
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Affiliation(s)
- Guoling Guo
- State Key Laboratory of Fruit Biology, School of Horticulture, Anhui Agricultural University, Hefei 230036, China
| | - Tao Yu
- State Key Laboratory of Fruit Biology, School of Horticulture, Anhui Agricultural University, Hefei 230036, China
- Agricultural Experimental Center of Guiyang, Guiyang Agriculture and Rural Bureau, Guiyang 550018, China
| | - Haiyan Zhang
- State Key Laboratory of Fruit Biology, School of Horticulture, Anhui Agricultural University, Hefei 230036, China
| | - Meng Chen
- State Key Laboratory of Fruit Biology, School of Horticulture, Anhui Agricultural University, Hefei 230036, China
- Singleron Biotechnology Co., Ltd., Nanjing 210000, China
| | - Weiyu Dong
- State Key Laboratory of Fruit Biology, School of Horticulture, Anhui Agricultural University, Hefei 230036, China
| | - Shuqin Zhang
- State Key Laboratory of Fruit Biology, School of Horticulture, Anhui Agricultural University, Hefei 230036, China
| | - Xiaomei Tang
- State Key Laboratory of Fruit Biology, School of Horticulture, Anhui Agricultural University, Hefei 230036, China
| | - Lun Liu
- State Key Laboratory of Fruit Biology, School of Horticulture, Anhui Agricultural University, Hefei 230036, China
| | - Wei Heng
- State Key Laboratory of Fruit Biology, School of Horticulture, Anhui Agricultural University, Hefei 230036, China
| | - Liwu Zhu
- State Key Laboratory of Fruit Biology, School of Horticulture, Anhui Agricultural University, Hefei 230036, China
| | - Bing Jia
- State Key Laboratory of Fruit Biology, School of Horticulture, Anhui Agricultural University, Hefei 230036, China
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Song H, Geng Q, Wu X, Hu M, Ye M, Yu X, Chen Y, Xu J, Jiang L, Cao S. The transcription factor MYC1 interacts with FIT to negatively regulate iron homeostasis in Arabidopsis thaliana. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2023; 114:193-208. [PMID: 36721966 DOI: 10.1111/tpj.16130] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Revised: 12/29/2022] [Accepted: 01/24/2023] [Indexed: 06/18/2023]
Abstract
Iron (Fe) is an indispensable trace mineral element for the normal growth of plants, and it is involved in different biological processes; Fe shortage in plants can induce chlorosis and yield loss. The objective of this research is to identify novel genes that participated in the regulation of Fe-deficiency stress in Arabidopsis thaliana. A basic helix-loop-helix (bHLH) transcription factor (MYC1) was identified to be interacting with the FER-LIKE IRON DEFICIENCY-INDUCED TRANSCRIPTION FACTOR (FIT) using a yeast-two-hybrid assay. Transcript-level analysis showed that there was a decrease in MYC1 expression in Arabidopsis to cope with Fe-deficiency stress. Functional deficiency of MYC1 in Arabidopsis leads to an increase in Fe-deficiency tolerance and Fe-accumulation, whereas MYC1-overexpressing plants have an enhanced sensitivity to Fe-deficiency stress. Additionally, MYC1 inhibited the formation of FIT and bHLH38/39 heterodimers, which suppressed the expressed level for Fe acquisition genes FRO2 and IRT1 during Fe-deficiency stress. These results showed that MYC1 functions as a negative modulator of the Fe-deficiency stress response by inhibiting the formation of FIT and bHLH38/39 heterodimers, thereby suppressing the binding of FIT and bHLH38/39 heterodimers to the promoters of FRO2 and IRT1 to modulate Fe intake during Fe-deficiency stress. Overall, the findings of this study elucidated the role of MYC1 in coping with Fe-deficiency stress, and provided potential targets for the developing of crop varieties resistant to Fe-deficiency stress.
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Affiliation(s)
- Hui Song
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, 230009, China
| | - Qingliu Geng
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, 230009, China
| | - Xi Wu
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, 230009, China
| | - Min Hu
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, 230009, China
| | - Min Ye
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, 230009, China
| | - Xin Yu
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, 230009, China
| | - Yifan Chen
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, 230009, China
| | - Jiena Xu
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, 230009, China
| | - Li Jiang
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, 230009, China
| | - Shuqing Cao
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, 230009, China
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6
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Huang Y, Xi X, Chai M, Ma S, Su H, Liu K, Wang F, Zhu W, Liu Y, Qin Y, Cai H. Chromatin Remodeling Complex SWR1 Regulates Root Development by Affecting the Accumulation of Reactive Oxygen Species (ROS). PLANTS (BASEL, SWITZERLAND) 2023; 12:940. [PMID: 36840288 PMCID: PMC9964059 DOI: 10.3390/plants12040940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Revised: 02/12/2023] [Accepted: 02/17/2023] [Indexed: 06/18/2023]
Abstract
Reactive oxygen species (ROS), a type of oxygen monoelectronic reduction product, play integral roles in root growth and development. The epigenetic mechanism plays a critical role in gene transcription and expression; however, its regulation of ROS metabolism in root development is still limited. We found that the chromatin remodeling complex SWR1 regulates root length and lateral root formation in Arabidopsis. Our transcriptome results and gene ontology (GO) enrichment analysis showed that the oxidoreductase activity-related genes significantly changed in mutants for the Arabidopsis SWR1 complex components, such as arp6 and pie1, and histone variant H2A.Z triple mutant hta8 hta9 hta11. The three encoding genes in Arabidopsis are the three H2A.Z variants hta8, hta9, and hta11. Histochemical assays revealed that the SWR1 complex affects ROS accumulation in roots. Furthermore, chromatin immunoprecipitation quantitative real-time PCR (ChIP-qPCR) analysis showed that the reduced H2A.Z deposition in oxidoreductase activity-related genes caused ROS to accumulate in arp6, pie1, and hta8 hta9 hta11. H2A.Z deposition-deficient mutants decreased after the trimethylation of lysine 4 on histone H3 (H3K4me3) modifications and RNA polymerase II (Pol II) enrichment, and increased after the trimethylation of lysine 27 on histone H3 (H3K27me3) modifications, which may account for the expression change in oxidoreductase activity-related genes. In summary, our results revealed that the chromatin complex SWR1 regulates ROS accumulation in root development, highlighting the critical role of epigenetic mechanisms.
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Affiliation(s)
- Youmei Huang
- Fujian Provincial Key Laboratory of Haixia Applied Plant Systems Biology, State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Xinpeng Xi
- Fujian Provincial Key Laboratory of Haixia Applied Plant Systems Biology, State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Mengnan Chai
- Fujian Provincial Key Laboratory of Haixia Applied Plant Systems Biology, State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Suzhuo Ma
- Fujian Provincial Key Laboratory of Haixia Applied Plant Systems Biology, State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Han Su
- Fujian Provincial Key Laboratory of Haixia Applied Plant Systems Biology, State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Kaichuang Liu
- Fujian Provincial Key Laboratory of Haixia Applied Plant Systems Biology, State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Fengjiao Wang
- Fujian Provincial Key Laboratory of Haixia Applied Plant Systems Biology, State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Wenhui Zhu
- Fujian Provincial Key Laboratory of Haixia Applied Plant Systems Biology, State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Yanhui Liu
- Fujian Provincial Key Laboratory of Haixia Applied Plant Systems Biology, State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China
- College of Life Science, Longyan University, Longyan 364012, China
| | - Yuan Qin
- Fujian Provincial Key Laboratory of Haixia Applied Plant Systems Biology, State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangxi Key Lab of Sugarcane Biology, College of Agriculture, Guangxi University, Nanning 530004, China
| | - Hanyang Cai
- Fujian Provincial Key Laboratory of Haixia Applied Plant Systems Biology, State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China
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7
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Wu X, Wang T, Song H, Jia Y, Ma Q, Tao M, Zhu X, Cao S. The transcription factor WRKY12 negatively regulates iron entry into seeds in Arabidopsis. JOURNAL OF EXPERIMENTAL BOTANY 2023; 74:415-426. [PMID: 36223275 DOI: 10.1093/jxb/erac404] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2022] [Accepted: 10/11/2022] [Indexed: 06/16/2023]
Abstract
Yellow Stripe 1-Like 1 (YSL1) and Yellow Stripe 1-Like 3 (YSL3) transport metal-nicotianamine (NA) complexes to leaves, pollen, and developing seeds and play an important role in regulating iron (Fe) accumulation during the seed development and maturation stages; however, how their gene transcript levels are regulated remains unknown. In this study, we used yeast one-hybrid screening to identify a transcription factor, WRKY12, in Arabidopsis that directly regulates the transcription levels of YSL1 and YSL3 genes. WRKY12 has opposite expression patterns to YSL1 and YSL3. wrky12 mutants are tolerant to Fe deficiency, whereas WRKY12 overexpression lines are sensitive to Fe deficiency. During the development and maturation of seeds, WRKY12 can directly bind to the promoters of YSL1 and YSL3 and inhibit their expression. Genetic analysis showed that WRKY12 functions upstream of YSL1 and YSL3 in Fe intake during the seed development and maturation stages. Together, our results suggest that WRKY12 negatively regulates the iron intake in plant seeds by inhibiting the expression of YSL1 and YSL3.
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Affiliation(s)
- Xi Wu
- School of Food and Biological Engineering, Hefei University of Technology, Hefei 230009, China
| | - Tingting Wang
- School of Food and Biological Engineering, Hefei University of Technology, Hefei 230009, China
| | - Hui Song
- School of Food and Biological Engineering, Hefei University of Technology, Hefei 230009, China
| | - Yafeng Jia
- School of Food and Biological Engineering, Hefei University of Technology, Hefei 230009, China
| | - Qian Ma
- School of Food and Biological Engineering, Hefei University of Technology, Hefei 230009, China
| | - Manzhi Tao
- School of Food and Biological Engineering, Hefei University of Technology, Hefei 230009, China
| | - Xiangyu Zhu
- School of Food and Biological Engineering, Hefei University of Technology, Hefei 230009, China
| | - Shuqing Cao
- School of Food and Biological Engineering, Hefei University of Technology, Hefei 230009, China
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Tang B, Yang G, Du J, Xie L, Wang J, Pan L, Luo Y, Shan Q, Zou X, Xiong C, Liu F. Analysis of the response regulatory network of pepper genes under hydrogen peroxide stress. FRONTIERS IN PLANT SCIENCE 2022; 13:1018991. [PMID: 36570911 PMCID: PMC9772053 DOI: 10.3389/fpls.2022.1018991] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/14/2022] [Accepted: 11/15/2022] [Indexed: 06/17/2023]
Abstract
Hydrogen peroxide (H2O2) is a regulatory component related to plant signal transduction. To better understand the genome-wide gene expression response to H2O2 stress in pepper plants, a regulatory network of H2O2 stress-gene expression in pepper leaves and roots was constructed in the present study. We collected the normal tissues of leaves and roots of pepper plants after 40 days of H2O2 treatment and obtained the RNA-seq data of leaves and roots exposed to H2O2 for 0.5-24 h. By comparing the gene responses of pepper leaves and roots exposed to H2O2 stress for different time periods, we found that the response in roots reached the peak at 3 h, whereas the response in leaves reached the peak at 24 h after treatment, and the response degree in the roots was higher than that in the leaves. We used all datasets for K-means analysis and network analysis identified the clusters related to stress response and related genes. In addition, CaEBS1, CaRAP2, and CabHLH029 were identified through a co-expression analysis and were found to be strongly related to several reactive oxygen species-scavenging enzyme genes; their homologous genes in Arabidopsis showed important functions in response to hypoxia or iron uptake. This study provides a theoretical basis for determining the dynamic response process of pepper plants to H2O2 stress in leaves and roots, as well as for determining the critical time and the molecular mechanism of H2O2 stress response in leaves and roots. The candidate transcription factors identified in this study can be used as a reference for further experimental verification.
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Affiliation(s)
- Bingqian Tang
- College of Horticulture, Hunan Agricultural University, Changsha, Hunan, China
- Longping Branch, Graduate School of Hunan University, Changsha, Hunan, China
- Engineering Research Center for Germplasm Innovation and New Varieties Breeding of Horticultural Crops, Key Laboratory for Vegetable Biology of Hunan Province, College of Horticulture, Hunan Agricultural University, Changsha, China
| | - Guangbin Yang
- Longping Branch, Graduate School of Hunan University, Changsha, Hunan, China
| | - Juan Du
- Longping Branch, Graduate School of Hunan University, Changsha, Hunan, China
| | - Lingling Xie
- Engineering Research Center for Germplasm Innovation and New Varieties Breeding of Horticultural Crops, Key Laboratory for Vegetable Biology of Hunan Province, College of Horticulture, Hunan Agricultural University, Changsha, China
| | - Jin Wang
- College of Horticulture, Hunan Agricultural University, Changsha, Hunan, China
| | - Luzhao Pan
- College of Horticulture, Hunan Agricultural University, Changsha, Hunan, China
| | - Yin Luo
- Longping Branch, Graduate School of Hunan University, Changsha, Hunan, China
| | - Qingyun Shan
- College of Horticulture, Hunan Agricultural University, Changsha, Hunan, China
| | - Xuexiao Zou
- College of Horticulture, Hunan Agricultural University, Changsha, Hunan, China
- Longping Branch, Graduate School of Hunan University, Changsha, Hunan, China
- Engineering Research Center for Germplasm Innovation and New Varieties Breeding of Horticultural Crops, Key Laboratory for Vegetable Biology of Hunan Province, College of Horticulture, Hunan Agricultural University, Changsha, China
- Laboratory of Lingnan Modern Agriculture, Guangzhou, Guangdong, China
| | - Cheng Xiong
- College of Horticulture, Hunan Agricultural University, Changsha, Hunan, China
- Engineering Research Center for Germplasm Innovation and New Varieties Breeding of Horticultural Crops, Key Laboratory for Vegetable Biology of Hunan Province, College of Horticulture, Hunan Agricultural University, Changsha, China
| | - Feng Liu
- College of Horticulture, Hunan Agricultural University, Changsha, Hunan, China
- Longping Branch, Graduate School of Hunan University, Changsha, Hunan, China
- Engineering Research Center for Germplasm Innovation and New Varieties Breeding of Horticultural Crops, Key Laboratory for Vegetable Biology of Hunan Province, College of Horticulture, Hunan Agricultural University, Changsha, China
- Laboratory of Lingnan Modern Agriculture, Guangzhou, Guangdong, China
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