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Song D, Huang K, Li S, Jiang J, Zhao L, Luan H. GmCYB5-4 inhibit SMV proliferation by targeting P3 protein. Virology 2024; 595:110069. [PMID: 38640788 DOI: 10.1016/j.virol.2024.110069] [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: 12/28/2023] [Revised: 03/21/2024] [Accepted: 03/26/2024] [Indexed: 04/21/2024]
Abstract
Soybean mosaic virus (SMV) is a potyvirus found worldwide in soybean (Glycine max). GmCYB5-4 is a strong candidate interactor of P3. In this study, we comprehensively analyzed the GmCYB5 family in soybeans, including its distribution on chromosomes, promoter analysis, conserved motifs, phylogenetic analysis, and expression patterns. We cloned the full-length GmCYB5-4 and examined its interaction with P3 in yeast, which was later confirmed using bimolecular fluorescence complementation (BiFc). We silenced GmCYB5-4 using a bean pottle mosaic viris (BPMV) based system to generate SilCYB5-4 tissues, which surprisingly knocked down four isoforms of GmCYB5s for functional characterization. SilCYB5-4 plants were challenged with the SC3 strain to determine its involvement in SMV infection. Silencing GmCYB5-4 increased SMV accumulation, indicating that GmCYB5-4 inhibited SMV proliferation. However, further experiments are needed to elucidate the mechanism underlying the involvement of GmCYB5-4 in SMV infection.
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Affiliation(s)
- Daiqiao Song
- Institute of Plant Genetic Engineering, College of Life Sciences, Qingdao Agricultural University, Qingdao, 266109, Shandong, China
| | - Kai Huang
- Institute of Plant Genetic Engineering, College of Life Sciences, Qingdao Agricultural University, Qingdao, 266109, Shandong, China
| | - Shuxin Li
- Institute of Plant Genetic Engineering, College of Life Sciences, Qingdao Agricultural University, Qingdao, 266109, Shandong, China
| | - Jia Jiang
- Hospital of Qingdao Agricultural University, Qingdao, 266109, China
| | - Longgang Zhao
- College of Grassland Science, Qingdao Agricultural University, Qingdao, 266109, China; High-efficiency Agricultural Technology Industry Research Institute of Saline and alkaline Land of Dongying Qingdao Agricultural University, China.
| | - Hexiang Luan
- Institute of Plant Genetic Engineering, College of Life Sciences, Qingdao Agricultural University, Qingdao, 266109, Shandong, China; High-efficiency Agricultural Technology Industry Research Institute of Saline and alkaline Land of Dongying Qingdao Agricultural University, China.
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2
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Yin M, Li Y, Liu H. The first intron of EIJ1 confers a specific response to wounding and herbivore stresses. PLANT BIOLOGY (STUTTGART, GERMANY) 2024; 26:197-203. [PMID: 38198233 DOI: 10.1111/plb.13617] [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: 09/13/2023] [Accepted: 12/09/2023] [Indexed: 01/12/2024]
Abstract
Plants are constantly exposed to different kinds of biotic stress, such as herbivore attack and wounding. To deal with these stresses, plants have evolved sophisticated defence mechanisms to protect themselves. Previously, we found that EIJ1 (EDS1-interacting J protein 1) plays a negative regulatory role in plant disease resistance in Arabidopsis thaliana. Follow-up studies revealed that EIJ1 specifically responds to wounding and herbivore stresses. The expression of EIJ1 was specifically induced by wounding or herbivore stress, as demonstrated by similar results in EIJ1 protein assay. Interestingly, GUS staining found that the promoter of EIJ1 is not involved in the induction of expression under wounding stress. Instead, we identified the first intron of EIJ1 as a key factor in response to wounding stress. Deleting the first intron of EIJ1 resulted in a loss of response to wounding stress in plants. Our results broaden the role of EIJ1 in plant resistance to biotic stress and provide new insights into plant responses to biotic stress.
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Affiliation(s)
- M Yin
- Institute of Fruit Tree Research, Guangdong Academy of Agricultural Sciences; Key Laboratory of South Subtropical Fruit Biology and Genetic Resource Utilization, Ministry of Agriculture and Rural Affairs; Guangdong Provincial Key Laboratory of Tropical and Subtropical Fruit Tree Research, Guangzhou, China
| | - Y Li
- Guangdong Provincial Key Laboratory of Applied Botany and State Key Laboratory of Plant Diversity and Prominent Crops, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China
| | - H Liu
- Institute of Fruit Tree Research, Guangdong Academy of Agricultural Sciences; Key Laboratory of South Subtropical Fruit Biology and Genetic Resource Utilization, Ministry of Agriculture and Rural Affairs; Guangdong Provincial Key Laboratory of Tropical and Subtropical Fruit Tree Research, Guangzhou, China
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Dean EA, Finer JJ. Amino acids induce high seed-specific expression driven by a soybean (Glycine max) glycinin seed storage protein promoter. PLANT CELL REPORTS 2023; 42:123-136. [PMID: 36271177 DOI: 10.1007/s00299-022-02940-4] [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: 09/17/2022] [Accepted: 10/16/2022] [Indexed: 06/16/2023]
Abstract
We characterize GFP expression driven by a soybean glycinin promoter in transgenic soybean. We demonstrate specific amino acid-mediated induction of this promoter in developing soybean seeds in vitro. In plants, gene expression is primarily regulated by promoter regions which are located upstream of gene coding sequences. Promoters allow transcription in certain tissues and respond to environmental stimuli as well as other inductive phenomena. In soybean, seed storage proteins (SSPs) accumulate during seed development and account for most of the monetary and nutritional value of this crop. To better study the regulatory functions of a SSP promoter, we developed a cotyledon culture system where media and media addenda were evaluated for their effects on cotyledon development and promoter activity. Stably transformed soybean events containing a glycinin SSP promoter regulating the green fluorescent protein (GFP) were generated. Promoter activity, as visualized by GFP expression, was only observed in developing in planta seeds and in vitro-cultured isolated embryos and cotyledons from developing seeds when specific media addenda were included. Asparagine, proline, and especially glutamine induced glycinin promoter activity in cultured cotyledons from developing seeds. Other amino acids did not induce the glycinin promoter. Here, we report, for the first time, induction of a reintroduced glycinin SSP promoter by specific amino acids in cotyledon tissues during seed development.
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Affiliation(s)
- Eric A Dean
- Department of Horticulture and Crop Science, The Ohio State University, 1680 Madison Ave, Wooster, OH, 44691, USA.
- Pairwise, 110 TW Alexander Dr, Research Triangle Park, Durham, NC, 27709, USA.
| | - John J Finer
- Department of Horticulture and Crop Science, The Ohio State University, 1680 Madison Ave, Wooster, OH, 44691, USA
- Kapnik Center, Florida Gulf Coast University, 4940 Bayshore Dr, Naples, FL, 34112, USA
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Identification and Functional Evaluation of Three Polyubiquitin Promoters from Hevea brasiliensis. FORESTS 2022. [DOI: 10.3390/f13060952] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Hevea brasiliensis is an economically important tree species that provides the only commercial source of natural rubber. The replacement of the CaMV35S promoter by endogenous polyubiquitin promoters may be a viable way to improve the genetic transformation of this species. However, no endogenous polyubiquitin promoters in Hevea have been reported yet. Here, we identified three Hevea polyubiquitin genes HbUBI10.1, HbUBI10.2 and HbUBI10.3, which encode ubiquitin monomers having nearly identical amino acid sequences to that of AtUBQ10. The genomic fragments upstream of these HbUBI genes, including the signature leading introns, were amplified as putative HbUBI promoters. In silico analysis showed that a number of cis-acting elements which are conserved within strong constitutive polyubiquitin promoters were presented in these HbUBI promoters. Transcriptomic data revealed that HbUBI10.1 and HbUBI10.2 had a constitutive expression in Hevea plants. Semi-quantitative RT-PCR showed that these three HbUBI genes were expressed higher than the GUS gene driven by CaMV35S in transgenic Hevea leaves. All three HbUBI promoters exhibited the capability to direct GFP expression in both transient and stable transformation assays, although they produced lower protoplast transformation efficiencies than the CaMV35S promoter. These HbUBI promoters will expand the availability of promoters for driving the transgene expression in Hevea genetic engineering.
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Huang R, Xiao D, Wang X, Zhan J, Wang A, He L. Genome-wide identification, evolutionary and expression analyses of LEA gene family in peanut (Arachis hypogaea L.). BMC PLANT BIOLOGY 2022; 22:155. [PMID: 35354373 PMCID: PMC8966313 DOI: 10.1186/s12870-022-03462-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Accepted: 02/10/2022] [Indexed: 05/05/2023]
Abstract
BACKGROUND Late embryogenesis abundant (LEA) proteins are a group of highly hydrophilic glycine-rich proteins, which accumulate in the late stage of seed maturation and are associated with many abiotic stresses. However, few peanut LEA genes had been reported, and the research on the number, location, structure, molecular phylogeny and expression of AhLEAs was very limited. RESULTS In this study, 126 LEA genes were identified in the peanut genome through genome-wide analysis and were further divided into eight groups. Sequence analysis showed that most of the AhLEAs (85.7%) had no or only one intron. LEA genes were randomly distributed on 20 chromosomes. Compared with tandem duplication, segmental duplication played a more critical role in AhLEAs amplication, and 93 segmental duplication AhLEAs and 5 pairs of tandem duplication genes were identified. Synteny analysis showed that some AhLEAs genes come from a common ancestor, and genome rearrangement and translocation occurred among these genomes. Almost all promoters of LEAs contain ABRE, MYB recognition sites, MYC recognition sites, and ERE cis-acting elements, suggesting that the LEA genes were involved in stress response. Gene transcription analyses revealed that most of the LEAs were expressed in the late stages of peanut embryonic development. LEA3 (AH16G06810.1, AH06G03960.1), and Dehydrin (AH07G18700.1, AH17G19710.1) were highly expressed in roots, stems, leaves and flowers. Moreover, 100 AhLEAs were involved in response to drought, low-temperature, or Al stresses. Some LEAs that were regulated by different abiotic stresses were also regulated by hormones including ABA, brassinolide, ethylene and salicylic acid. Interestingly, AhLEAs that were up-regulated by ethylene and salicylic acid showed obvious subfamily preferences. Furthermore, three AhLEA genes, AhLEA1, AhLEA3-1, and AhLEA3-3, which were up-regulated by drought, low-temperature, or Al stresses was proved to enhance cold and Al tolerance in yeast, and AhLEA3-1 enhanced the drought tolerance in yeast. CONCLUSIONS AhLEAs are involved in abiotic stress response, and segmental duplication plays an important role in the evolution and amplification of AhLEAs. The genome-wide identification, classification, evolutionary and transcription analyses of the AhLEA gene family provide a foundation for further exploring the LEA genes' function in response to abiotic stress in peanuts.
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Affiliation(s)
- RuoLan Huang
- National Demonstration Center for Experimental Plant Science Education, College of Agriculture, Guangxi University, Nanning, 530004, China
| | - Dong Xiao
- National Demonstration Center for Experimental Plant Science Education, College of Agriculture, Guangxi University, Nanning, 530004, China.
- Guangxi Key Laboratory for Agro-Environment and Agro-Product Safety, Nanning, 530004, China.
- Key Laboratory of Crop Cultivation and Tillage, Guangxi Colleges and Universities, Nanning, 530004, China.
| | - Xin Wang
- National Demonstration Center for Experimental Plant Science Education, College of Agriculture, Guangxi University, Nanning, 530004, China
| | - Jie Zhan
- National Demonstration Center for Experimental Plant Science Education, College of Agriculture, Guangxi University, Nanning, 530004, China
- Guangxi Key Laboratory for Agro-Environment and Agro-Product Safety, Nanning, 530004, China
- Key Laboratory of Crop Cultivation and Tillage, Guangxi Colleges and Universities, Nanning, 530004, China
| | - AiQing Wang
- National Demonstration Center for Experimental Plant Science Education, College of Agriculture, Guangxi University, Nanning, 530004, China
- Guangxi Key Laboratory for Agro-Environment and Agro-Product Safety, Nanning, 530004, China
- Key Laboratory of Crop Cultivation and Tillage, Guangxi Colleges and Universities, Nanning, 530004, China
| | - LongFei He
- National Demonstration Center for Experimental Plant Science Education, College of Agriculture, Guangxi University, Nanning, 530004, China
- Guangxi Key Laboratory for Agro-Environment and Agro-Product Safety, Nanning, 530004, China
- Key Laboratory of Crop Cultivation and Tillage, Guangxi Colleges and Universities, Nanning, 530004, China
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Carlson E, Stewart K, Baier K, McGuigan L, Culpepper T, Powell W. Pathogen-induced expression of a blight tolerance transgene in American chestnut. MOLECULAR PLANT PATHOLOGY 2022; 23:370-382. [PMID: 34841616 PMCID: PMC8828690 DOI: 10.1111/mpp.13165] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Revised: 10/26/2021] [Accepted: 11/03/2021] [Indexed: 06/13/2023]
Abstract
American chestnut (Castanea dentata) is a susceptible host of the invasive necrotrophic fungus Cryphonectria parasitica, which causes chestnut blight disease. The fungal pathogen attacks chestnut stems by invading wounded tissue and secreting oxalate. This process leads to the death of infected host cells and the formation of cankers, eventually girdling stems and killing the tree above the infections. To reduce damage caused by fungal oxalate, American chestnut has been genetically engineered to express a wheat oxalate oxidase (OxO). This enzyme degrades the oxalate produced by the pathogen and confers elevated tolerance to Cryphonectria parasitica infection. We report new lines of transgenic American chestnut that have been developed with the win3.12 inducible promoter from poplar (Populus deltoides) driving OxO expression. This promoter is responsive to both wounding and pathogen infection, with a low level of baseline expression. Targeted expression of OxO to wounded and infected tissue is sought as an alternative to constitutive expression for potential metabolic resource conservation and transgene stability over the long lifetime of a tree and over successive generations of breeding. Transgenic Castanea dentata lines harbouring the win3.12-OxO construct were evaluated for transgene expression patterns and tolerance to chestnut blight infection. OxO transcript levels were low in uninfected plants, but robust infection-induced expression levels were observed, with one transgenic line reaching levels comparable to those of previously characterized CaMV35S-OxO lines. In chestnut blight infection bioassays, win3.12-OxO lines showed elevated disease tolerance similar to blight-resistant Chinese chestnut (Castanea mollissima) controls.
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Affiliation(s)
- Erik Carlson
- Department of Environmental BiologySUNY College of Environmental Science and ForestrySyracuseNew YorkUSA
| | - Kristen Stewart
- Department of Environmental BiologySUNY College of Environmental Science and ForestrySyracuseNew YorkUSA
| | - Kathleen Baier
- Department of Environmental BiologySUNY College of Environmental Science and ForestrySyracuseNew YorkUSA
| | - Linda McGuigan
- Department of Environmental BiologySUNY College of Environmental Science and ForestrySyracuseNew YorkUSA
| | - Tobi Culpepper
- Department of Environmental BiologySUNY College of Environmental Science and ForestrySyracuseNew YorkUSA
| | - William Powell
- Department of Environmental BiologySUNY College of Environmental Science and ForestrySyracuseNew YorkUSA
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Liu Q, Yan T, Tan X, Wei Z, Li Y, Sun Z, Zhang H, Chen J. Genome-Wide Identification and Gene Expression Analysis of the OTU DUB Family in Oryza sativa. Viruses 2022; 14:v14020392. [PMID: 35215984 PMCID: PMC8878984 DOI: 10.3390/v14020392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Revised: 02/03/2022] [Accepted: 02/11/2022] [Indexed: 12/10/2022] Open
Abstract
Ovarian tumor domain (OTU)-containing deubiquitinating enzymes (DUBs) are an essential DUB to maintain protein stability in plants and play important roles in plant growth development and stress response. However, there is little genome-wide identification and analysis of the OTU gene family in rice. In this study, we identified 20 genes of the OTU family in rice genome, which were classified into four groups based on the phylogenetic analysis. Their gene structures, conserved motifs and domains, chromosomal distribution, and cis elements in promoters were further studied. In addition, OTU gene expression patterns in response to plant hormone treatments, including SA, MeJA, NAA, BL, and ABA, were investigated by RT-qPCR analysis. The results showed that the expression profile of OsOTU genes exhibited plant hormone-specific expression. Expression levels of most of the rice OTU genes were significantly changed in response to rice stripe virus (RSV), rice black-streaked dwarf virus (RBSDV), Southern rice black-streaked dwarf virus (SRBSDV), and Rice stripe mosaic virus (RSMV). These results suggest that the rice OTU genes are involved in diverse hormone signaling pathways and in varied responses to virus infection, providing new insights for further functional study of OsOTU genes.
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Affiliation(s)
- Qiannan Liu
- College of Plant Protection, Northwest Agriculture and Forestry University, Yangling, Xianyang 712100, China; (Q.L.); (T.Y.); (X.T.)
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Key Laboratory of Biotechnology in Plant Protection of Ministry of Agriculture and Zhejiang Province, Institute of Plant Virology, Ningbo University, Ningbo 315211, China; (Z.W.); (Y.L.); (Z.S.)
| | - Tingyun Yan
- College of Plant Protection, Northwest Agriculture and Forestry University, Yangling, Xianyang 712100, China; (Q.L.); (T.Y.); (X.T.)
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Key Laboratory of Biotechnology in Plant Protection of Ministry of Agriculture and Zhejiang Province, Institute of Plant Virology, Ningbo University, Ningbo 315211, China; (Z.W.); (Y.L.); (Z.S.)
| | - Xiaoxiang Tan
- College of Plant Protection, Northwest Agriculture and Forestry University, Yangling, Xianyang 712100, China; (Q.L.); (T.Y.); (X.T.)
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Key Laboratory of Biotechnology in Plant Protection of Ministry of Agriculture and Zhejiang Province, Institute of Plant Virology, Ningbo University, Ningbo 315211, China; (Z.W.); (Y.L.); (Z.S.)
| | - Zhongyan Wei
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Key Laboratory of Biotechnology in Plant Protection of Ministry of Agriculture and Zhejiang Province, Institute of Plant Virology, Ningbo University, Ningbo 315211, China; (Z.W.); (Y.L.); (Z.S.)
| | - Yanjun Li
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Key Laboratory of Biotechnology in Plant Protection of Ministry of Agriculture and Zhejiang Province, Institute of Plant Virology, Ningbo University, Ningbo 315211, China; (Z.W.); (Y.L.); (Z.S.)
| | - Zongtao Sun
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Key Laboratory of Biotechnology in Plant Protection of Ministry of Agriculture and Zhejiang Province, Institute of Plant Virology, Ningbo University, Ningbo 315211, China; (Z.W.); (Y.L.); (Z.S.)
| | - Hehong Zhang
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Key Laboratory of Biotechnology in Plant Protection of Ministry of Agriculture and Zhejiang Province, Institute of Plant Virology, Ningbo University, Ningbo 315211, China; (Z.W.); (Y.L.); (Z.S.)
- Correspondence: (H.Z.); (J.C.)
| | - Jianping Chen
- College of Plant Protection, Northwest Agriculture and Forestry University, Yangling, Xianyang 712100, China; (Q.L.); (T.Y.); (X.T.)
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Key Laboratory of Biotechnology in Plant Protection of Ministry of Agriculture and Zhejiang Province, Institute of Plant Virology, Ningbo University, Ningbo 315211, China; (Z.W.); (Y.L.); (Z.S.)
- Correspondence: (H.Z.); (J.C.)
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Huang D, Kosentka PZ, Liu W. Synthetic biology approaches in regulation of targeted gene expression. CURRENT OPINION IN PLANT BIOLOGY 2021; 63:102036. [PMID: 33930839 DOI: 10.1016/j.pbi.2021.102036] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2021] [Revised: 02/26/2021] [Accepted: 03/01/2021] [Indexed: 05/15/2023]
Abstract
Synthetic biology approaches are highly sought-after to facilitate the regulation of targeted gene expression in plants for functional genomics research and crop trait improvement. To date, synthetic regulation of gene expression predominantly focuses at the transcription level via engineering of synthetic promoters and transcription factors, while pioneering examples have started to emerge for synthetic regulation of gene expression at the levels of mRNA stability, translation, and protein degradation. This review discusses recent advances in plant synthetic biology for the regulation of gene expression at multiple levels, and highlights their future directions.
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Affiliation(s)
- Debao Huang
- Department of Horticultural Science, North Carolina State University, Raleigh, NC 27607, USA
| | - Pawel Z Kosentka
- Department of Horticultural Science, North Carolina State University, Raleigh, NC 27607, USA
| | - Wusheng Liu
- Department of Horticultural Science, North Carolina State University, Raleigh, NC 27607, USA.
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Cabre L, Peyrard S, Sirven C, Gilles L, Pelissier B, Ducerf S, Poussereau N. Identification and characterization of a new soybean promoter induced by Phakopsora pachyrhizi, the causal agent of Asian soybean rust. BMC Biotechnol 2021; 21:27. [PMID: 33765998 PMCID: PMC7995590 DOI: 10.1186/s12896-021-00684-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2020] [Accepted: 03/02/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Phakopsora pachyrhizi is a biotrophic fungal pathogen responsible for the Asian soybean rust disease causing important yield losses in tropical and subtropical soybean-producing countries. P. pachyrhizi triggers important transcriptional changes in soybean plants during infection, with several hundreds of genes being either up- or downregulated. RESULTS Based on published transcriptomic data, we identified a predicted chitinase gene, referred to as GmCHIT1, that was upregulated in the first hours of infection. We first confirmed this early induction and showed that this gene was expressed as early as 8 h after P. pachyrhizi inoculation. To investigate the promoter of GmCHIT1, transgenic soybean plants expressing the green fluorescence protein (GFP) under the control of the GmCHIT1 promoter were generated. Following inoculation of these transgenic plants with P. pachyrhizi, GFP fluorescence was detected in a limited area located around appressoria, the fungal penetration structures. Fluorescence was also observed after mechanical wounding whereas no variation in fluorescence of pGmCHIT1:GFP transgenic plants was detected after a treatment with an ethylene precursor or a methyl jasmonate analogue. CONCLUSION We identified a soybean chitinase promoter exhibiting an early induction by P. pachyrhizi located in the first infected soybean leaf cells. Our results on the induction of GmCHIT1 promoter by P. pachyrhizi contribute to the identification of a new pathogen inducible promoter in soybean and beyond to the development of a strategy for the Asian soybean rust disease control using biotechnological approaches.
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Affiliation(s)
- L. Cabre
- Univ Lyon, Université Lyon 1, CNRS, INSA-Lyon, Bayer SAS Crop Science Division, UMR 5240 MAP, Microbiologie, Adaptation et Pathogénie, 14 Impasse Pierre Baizet BP 99163, 69263 Lyon Cedex 09, France
| | - S. Peyrard
- Bayer SAS, Crop Science Division, 14 Impasse Pierre Baizet, BP 99163, 69263 Lyon Cedex 09, France
| | - C. Sirven
- Bayer SAS, Crop Science Division, 14 Impasse Pierre Baizet, BP 99163, 69263 Lyon Cedex 09, France
| | - L. Gilles
- Bayer SAS, Crop Science Division, 14 Impasse Pierre Baizet, BP 99163, 69263 Lyon Cedex 09, France
- Present address: Limagrain, Biopôle Clermont-Limagne, Rue Henri Mondor, 63360 Saint Beauzire, France
| | - B. Pelissier
- Bayer SAS, Crop Science Division, 14 Impasse Pierre Baizet, BP 99163, 69263 Lyon Cedex 09, France
| | - S. Ducerf
- Bayer SAS, Crop Science Division, 14 Impasse Pierre Baizet, BP 99163, 69263 Lyon Cedex 09, France
| | - N. Poussereau
- Univ Lyon, Université Lyon 1, CNRS, INSA-Lyon, Bayer SAS Crop Science Division, UMR 5240 MAP, Microbiologie, Adaptation et Pathogénie, 14 Impasse Pierre Baizet BP 99163, 69263 Lyon Cedex 09, France
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Wang Y, Wang C, Rajaofera MJN, Zhu L, Xu X, Liu W, Zheng F, Miao W. WY195, a New Inducible Promoter From the Rubber Powdery Mildew Pathogen, Can Be Used as an Excellent Tool for Genetic Engineering. Front Microbiol 2020; 11:610252. [PMID: 33424812 PMCID: PMC7793764 DOI: 10.3389/fmicb.2020.610252] [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: 09/25/2020] [Accepted: 11/24/2020] [Indexed: 11/13/2022] Open
Abstract
Until now, there are few studies and reports on the use of endogenous promoters of obligate biotrophic fungi. The WY195 promoter in the genome of Oidium heveae, the rubber powdery mildew pathogen, was predicted using PromoterScan and its promoter function was verified by the transient expression of the β-glucuronidase (GUS) gene. WY195 drove high levels of GUS expression in dicotyledons and monocotyledons. qRT-PCR indicated that GUS expression regulated by the WY195 promoter was 17.54-fold greater than that obtained using the CaMV 35S promoter in dicotyledons (Nicotiana tabacum), and 5.09-fold greater than that obtained using the ACT1 promoter in monocotyledons (Oryza sativa). Furthermore, WY195-regulated GUS gene expression was induced under high-temperature and drought conditions. Soluble proteins extracted from WY195-hpaXm transgenic tobacco was bioactive. Defensive micro-HR induced by the transgene expression of hpaXm was observed on transgenic tobacco leaves. Disease resistance bioassays showed that WY195-hpaXm transgenic tobacco enhanced the resistance to tobacco mosaic virus (TMV). WY195 has great potential for development as a new tool for genetic engineering. Further in-depth studies will help to better understand the transcriptional regulation mechanisms and the pathogenic mechanisms of O. heveae.
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Affiliation(s)
- Yi Wang
- Key Laboratory of Green Prevention and Control of Tropical Plant Diseases and Pests (Hainan University), Ministry of Education, Haikou, China
- College of Plant Protection, Hainan University, Haikou, China
- Hainan Academy of Ocean and Fisheries Sciences, Haikou, China
| | - Chen Wang
- Key Laboratory of Green Prevention and Control of Tropical Plant Diseases and Pests (Hainan University), Ministry of Education, Haikou, China
- College of Plant Protection, Hainan University, Haikou, China
| | - Mamy Jayne Nelly Rajaofera
- Key Laboratory of Green Prevention and Control of Tropical Plant Diseases and Pests (Hainan University), Ministry of Education, Haikou, China
- College of Plant Protection, Hainan University, Haikou, China
| | - Li Zhu
- Key Laboratory of Green Prevention and Control of Tropical Plant Diseases and Pests (Hainan University), Ministry of Education, Haikou, China
- College of Plant Protection, Hainan University, Haikou, China
| | - Xinze Xu
- Key Laboratory of Green Prevention and Control of Tropical Plant Diseases and Pests (Hainan University), Ministry of Education, Haikou, China
- College of Plant Protection, Hainan University, Haikou, China
| | - Wenbo Liu
- Key Laboratory of Green Prevention and Control of Tropical Plant Diseases and Pests (Hainan University), Ministry of Education, Haikou, China
- College of Plant Protection, Hainan University, Haikou, China
| | - Fucong Zheng
- Key Laboratory of Green Prevention and Control of Tropical Plant Diseases and Pests (Hainan University), Ministry of Education, Haikou, China
- College of Plant Protection, Hainan University, Haikou, China
| | - Weiguo Miao
- Key Laboratory of Green Prevention and Control of Tropical Plant Diseases and Pests (Hainan University), Ministry of Education, Haikou, China
- College of Plant Protection, Hainan University, Haikou, China
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An AP2/ERF Gene, HuERF1, from Pitaya ( Hylocereus undatus) Positively Regulates Salt Tolerance. Int J Mol Sci 2020; 21:ijms21134586. [PMID: 32605158 PMCID: PMC7369839 DOI: 10.3390/ijms21134586] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Revised: 06/24/2020] [Accepted: 06/25/2020] [Indexed: 11/17/2022] Open
Abstract
Pitaya (Hylocereus undatus) is a high salt-tolerant fruit, and ethylene response factors (ERFs) play important roles in transcription-regulating abiotic tolerance. To clarify the function of HuERF1 in the salt tolerance of pitaya, HuERF1 was heterogeneously expressed in Arabidopsis. HuERF1 had nuclear localization when HuERF1::GFP was expressed in Arabidopsis protoplasts and had transactivation activity when HuERF1 was expressed in yeast. The expression of HuERF1 in pitaya seedlings was significantly induced after exposure to ethylene and high salinity. Overexpression of HuERF1 in Arabidopsis conferred enhanced tolerance to salt stress, reduced the accumulation of superoxide (O2·¯) and hydrogen peroxide (H2O2), and improved antioxidant enzyme activities. These results indicate that HuERF1 is involved in ethylene-mediated salt stress tolerance, which may contribute to the salt tolerance of pitaya.
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Feng X, Feng P, Yu H, Yu X, Sun Q, Liu S, Minh TN, Chen J, Wang D, Zhang Q, Cao L, Zhou C, Li Q, Xiao J, Zhong S, Wang A, Wang L, Pan H, Ding X. GsSnRK1 interplays with transcription factor GsERF7 from wild soybean to regulate soybean stress resistance. PLANT, CELL & ENVIRONMENT 2020; 43:1192-1211. [PMID: 31990078 DOI: 10.1111/pce.13726] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Revised: 12/18/2019] [Accepted: 01/12/2020] [Indexed: 05/07/2023]
Abstract
Although the function and regulation of SnRK1 have been studied in various plants, its molecular mechanisms in response to abiotic stresses are still elusive. In this work, we identified an AP2/ERF domain-containing protein (designated GsERF7) interacting with GsSnRK1 from a wild soybean cDNA library. GsERF7 gene expressed dominantly in wild soybean roots and was responsive to ethylene, salt, and alkaline. GsERF7 bound GCC cis-acting element and could be phosphorylated on S36 by GsSnRK1. GsERF7 phosphorylation facilitated its translocation from cytoplasm to nucleus and enhanced its transactivation activity. When coexpressed in the hairy roots of soybean seedlings, GsSnRK1(wt) and GsERF7(wt) promoted plants to generate higher tolerance to salt and alkaline stresses than their mutated species, suggesting that GsSnRK1 may function as a biochemical and genetic upstream kinase of GsERF7 to regulate plant adaptation to environmental stresses. Furthermore, the altered expression patterns of representative abiotic stress-responsive and hormone-synthetic genes were determined in transgenic soybean hairy roots after stress treatments. These results will aid our understanding of molecular mechanism of how SnRK1 kinase plays a cardinal role in regulating plant stress resistances through activating the biological functions of downstream factors.
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Affiliation(s)
- Xu Feng
- Key Laboratory of Agricultural Biological Functional Genes, College of Life Science, Northeast Agricultural University, Harbin, 150030, China
| | - Peng Feng
- Key Laboratory of Agricultural Biological Functional Genes, College of Life Science, Northeast Agricultural University, Harbin, 150030, China
| | - Huilin Yu
- College of Plant Sciences, Jilin University, Changchun, 130062, China
| | - Xingyu Yu
- Key Laboratory of Agricultural Biological Functional Genes, College of Life Science, Northeast Agricultural University, Harbin, 150030, China
| | - Qi Sun
- Key Laboratory of Agricultural Biological Functional Genes, College of Life Science, Northeast Agricultural University, Harbin, 150030, China
| | - Siyu Liu
- Key Laboratory of Agricultural Biological Functional Genes, College of Life Science, Northeast Agricultural University, Harbin, 150030, China
| | - Thuy Nguyen Minh
- Key Laboratory of Agricultural Biological Functional Genes, College of Life Science, Northeast Agricultural University, Harbin, 150030, China
| | - Jun Chen
- Key Laboratory of Agricultural Biological Functional Genes, College of Life Science, Northeast Agricultural University, Harbin, 150030, China
| | - Di Wang
- Key Laboratory of Agricultural Biological Functional Genes, College of Life Science, Northeast Agricultural University, Harbin, 150030, China
| | - Qing Zhang
- Key Laboratory of Agricultural Biological Functional Genes, College of Life Science, Northeast Agricultural University, Harbin, 150030, China
| | - Lei Cao
- Key Laboratory of Agricultural Biological Functional Genes, College of Life Science, Northeast Agricultural University, Harbin, 150030, China
| | - Changmei Zhou
- College of Agronomy, Northeast Agricultural University, Harbin, 150030, China
| | - Qiang Li
- Key Laboratory of Agricultural Biological Functional Genes, College of Life Science, Northeast Agricultural University, Harbin, 150030, China
| | - Jialei Xiao
- Key Laboratory of Agricultural Biological Functional Genes, College of Life Science, Northeast Agricultural University, Harbin, 150030, China
| | - Shihua Zhong
- Department of Biochemistry, the University of Texas Southwestern Medical Center, Dallas, Texas, 75390
| | - Aoxue Wang
- College of Horticulture, Northeast Agricultural University, Harbin, 150030, China
| | - Lijuan Wang
- Key Laboratory of Agricultural Biological Functional Genes, College of Life Science, Northeast Agricultural University, Harbin, 150030, China
| | - Hongyu Pan
- College of Plant Sciences, Jilin University, Changchun, 130062, China
| | - Xiaodong Ding
- Key Laboratory of Agricultural Biological Functional Genes, College of Life Science, Northeast Agricultural University, Harbin, 150030, China
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Cao B, Shu L, Li A. Functional characterization of LkERF- B2 for improved salt tolerance ability in Arabidopsis thaliana. 3 Biotech 2019; 9:263. [PMID: 31192088 PMCID: PMC6560127 DOI: 10.1007/s13205-019-1793-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2018] [Accepted: 06/03/2019] [Indexed: 12/29/2022] Open
Abstract
The ethylene response factors have been reported to play critical roles in developmental and environmental responses in plants. In the present study, an ERF transcription factor gene was aimed to be identified from Larix kaempferi. Molecular characteristics and function of this gene were further explored. The result showed that a 1344 bp ERF transcription factor gene containing initiation and termination codon was obtained by RT-PCR and named LkERF-B2. LkERF-B2 gene encoded 447 amino acids containing a typical AP2/ERF domain. Alignment of predicted amino acid sequence of LkERF-B2 in various plant species showed that this ERF transcription factor was highly homologous (79.0%) with that of Picea sitchensi. To elucidate the function of LkERF-B2, LkERF-B2 overexpression vector was successfully constructed and transformed to Arabidopsis thaliana via dip flower. Compared with control plant, LkERF-B2 overexpressed transgenic A. thaliana showed a significantly higher survival rate under cold, heat, NaCl and drought stresses. NaCl stress analysis revealed that control and transgenic Arabidopsis were both flowering earlier under 100 and 150 mM/L NaCl treatment. While under 200-300 mM/L NaCl treatment, the growth of control plant was significantly inhibited compared with transgenic A. thaliana. Salt injury rate and salt injury index of transgenic Arabidopsis were lower than those of the control. Further investigation showed that transgenic Arabidopsis exhibited much higher content of chloroplast pigments under different NaCl concentration. Meanwhile, the activity of SOD and POD was also enhanced in transgenic A. thaliana. These results suggested that LkERF-B2 was a key transcription factor and could lead to enhanced salt stress tolerance.
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Affiliation(s)
- Beibei Cao
- College of Horticulture and Landscape Architecture (Key Laboratory of Fruit Science), Tianjin Agricultural University, Tianjin, 300000 China
| | - Lixiang Shu
- College of Horticulture and Landscape Architecture (Key Laboratory of Fruit Science), Tianjin Agricultural University, Tianjin, 300000 China
| | - Ai Li
- College of Horticulture and Landscape Architecture (Key Laboratory of Fruit Science), Tianjin Agricultural University, Tianjin, 300000 China
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Zhang N, McHale LK, Finer JJ. Changes to the core and flanking sequences of G-box elements lead to increases and decreases in gene expression in both native and synthetic soybean promoters. PLANT BIOTECHNOLOGY JOURNAL 2019; 17:724-735. [PMID: 30191675 PMCID: PMC6419578 DOI: 10.1111/pbi.13010] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2018] [Revised: 08/05/2018] [Accepted: 08/31/2018] [Indexed: 05/22/2023]
Abstract
Cis-regulatory elements in promoters are major determinants of binding specificity of transcription factors (TFs) for transcriptional regulation. To improve our understanding of how these short DNA sequences regulate gene expression, synthetic promoters consisting of both classical (CACGTG) and variant G-box core sequences along with different flanking sequences derived from the promoters of three different highly expressing soybean genes, were constructed and used to regulate a green fluorescent protein (gfp) gene. Use of the classical 6-bp G-box provided information on the base level of GFP expression while modifications to the 2-4 flanking bases on either side of the G-box influenced the intensity of gene expression in both transiently transformed lima bean cotyledons and stably transformed soybean hairy roots. The proximal 2-bp sequences on either flank of the G-box significantly affected G-box activity, while the distal 2-bp flanking nucleotides also influenced gene expression albeit with a decreasing effect. Manipulation of the upstream 2- to 4-bp flanking sequence of a G-box variant (GACGTG), found in the proximal region of a relatively weak soybean glycinin promoter, significantly enhanced promoter activity using both transient and stable expression assays, if the G-box variant was first converted into a classical G-box (CACGTG). In addition to increasing our understanding of regulatory element composition and structure, this study shows that minimal targeted changes in native promoter sequences can lead to enhanced gene expression, and suggests that genome editing of the promoter region can result in useful and predictable changes in native gene expression.
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Affiliation(s)
- Ning Zhang
- Department of Horticulture and Crop ScienceThe Ohio State UniversityWoosterOHUSA
- Present address:
Boyce Thompson InstituteCornell UniversityIthacaNYUSA
| | - Leah K. McHale
- Department of Horticulture and Crop ScienceThe Ohio State UniversityColumbusOHUSA
| | - John J. Finer
- Department of Horticulture and Crop ScienceThe Ohio State UniversityWoosterOHUSA
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Lignin Valorization: Two Hybrid Biochemical Routes for the Conversion of Polymeric Lignin into Value-added Chemicals. Sci Rep 2017; 7:8420. [PMID: 28827602 PMCID: PMC5566326 DOI: 10.1038/s41598-017-07895-1] [Citation(s) in RCA: 64] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2017] [Accepted: 07/06/2017] [Indexed: 11/26/2022] Open
Abstract
Naturally, many aerobic organisms degrade lignin-derived aromatics through conserved intermediates including protocatechuate and catechol. Employing this microbial approach offers a potential solution for valorizing lignin into valuable chemicals for a potential lignocellulosic biorefinery and enabling bioeconomy. In this study, two hybrid biochemical routes combining lignin chemical depolymerization, plant metabolic engineering, and synthetic pathway reconstruction were demonstrated for valorizing lignin into value-added products. In the biochemical route 1, alkali lignin was chemically depolymerized into vanillin and syringate as major products, which were further bio-converted into cis, cis-muconic acid (ccMA) and pyrogallol, respectively, using engineered Escherichia coli strains. In the second biochemical route, the shikimate pathway of Tobacco plant was engineered to accumulate protocatechuate (PCA) as a soluble intermediate compound. The PCA extracted from the engineered Tobacco was further converted into ccMA using the engineered E. coli strain. This study reports a direct process for converting lignin into ccMA and pyrogallol as value-added chemicals, and more importantly demonstrates benign methods for valorization of polymeric lignin that is inherently heterogeneous and recalcitrant. Our approach also validates the promising combination of plant engineering with microbial chassis development for the production of value added and speciality chemicals.
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Grant TNL, De La Torre CM, Zhang N, Finer JJ. Synthetic introns help identify sequences in the 5' UTR intron of the Glycine max polyubiquitin (Gmubi) promoter that give increased promoter activity. PLANTA 2017; 245:849-860. [PMID: 28070655 DOI: 10.1007/s00425-016-2646-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2016] [Accepted: 12/26/2016] [Indexed: 05/03/2023]
Abstract
MAIN CONCLUSION Specific sequences within the leader intron of a soybean polyubiquitin gene stimulated gene expression when placed either within a synthetic intron or upstream of a core promoter. The intron in the 5' untranslated region of the soybean polyubiquitin promoter, Gmubi, seems to contribute to the high activity of this promoter. To identify the stimulatory sequences within the intron, ten different sequential intronic sequences of 40 nt were isolated, cloned as tetrameric repeats and placed upstream of a minimal cauliflower mosaic virus 35S (35S) core promoter, which was used to control expression of the green fluorescent protein. Intron fragment tetramers were also cloned within a modified, native intron, creating a Synthetic INtron Cassette (SINC), which was then placed downstream of Gmubi and 35S core promoters. Intron fragment tetramers and SINC constructs were evaluated using transient expression in lima bean cotyledons and stable expression in soybean hairy roots. Intron fragments, used as tetramers upstream of the 35S core promoter, yielded up to 80 times higher expression than the core promoter in transient expression analyses and ten times higher expression in stably transformed hairy roots. Tetrameric intronic fragments, cloned downstream of the Gmubi and 35S core promoters and within the synthetic intron, also yielded increased transient and stable GFP expression that was up to 4 times higher than Gmubi alone and up to 40 times higher than the 35S core promoter alone. These intron fragments contain sequences that seem to act as promoter regulatory elements and may contribute to the increased expression observed with this native strong promoter. Intron regulatory elements and synthetic introns may provide additional tools for increasing transgene expression in plants.
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Affiliation(s)
- Trudi N L Grant
- Department of Horticulture and Crop Science, OARDC, The Ohio State University, 1680 Madison Ave., Wooster, OH, 44691, USA
- Mid-Florida Research and Education Center, Institute of Food and Agricultural Sciences, University of Florida, 2725 Binion Road, Apopka, FL, 32703-8504, USA
| | - Carola M De La Torre
- Department of Horticulture and Crop Science, OARDC, The Ohio State University, 1680 Madison Ave., Wooster, OH, 44691, USA
- Division of Plant Sciences, 315 Christopher S. Bond Life Sciences Center, University of Missouri-Columbia, Columbia, MO, 65211, USA
| | - Ning Zhang
- Department of Horticulture and Crop Science, OARDC, The Ohio State University, 1680 Madison Ave., Wooster, OH, 44691, USA
- Boyce Thompson Institute for Plant Research, Cornell University, 533 Tower Rd, Ithaca, NY, 14853, USA
| | - John J Finer
- Department of Horticulture and Crop Science, OARDC, The Ohio State University, 1680 Madison Ave., Wooster, OH, 44691, USA.
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Liu J, Wang Y, Zhao G, Zhao J, Du H, He X, Zhang H. A novel Gossypium barbadense ERF transcription factor, GbERFb, regulation host response and resistance to Verticillium dahliae in tobacco. PHYSIOLOGY AND MOLECULAR BIOLOGY OF PLANTS : AN INTERNATIONAL JOURNAL OF FUNCTIONAL PLANT BIOLOGY 2017; 23:125-134. [PMID: 28250589 PMCID: PMC5313406 DOI: 10.1007/s12298-016-0402-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2016] [Accepted: 11/27/2016] [Indexed: 05/02/2023]
Abstract
Ethylene-responsive factors (ERFs) are commonly considered to play an important role in pathogen defense responses. However, only few of ERF members have been characterized in Sea island cotton (Gossypium barbadense). Here, we reported a novel AP2/ERF transcription factors gene, named GbERFb which was cloned and identified from Sea island cotton by RACE. The expression of GbERFb was significantly induced by treatments with ethylene, Methyl jasmonate, salicylic acid, wounding, H2O2 and Verticillium dahliae (V. dahliae) infection. Bioinformatics analysis showed that GbERFb protein containing a conserved ERF DNA binding domain and a nuclear localization signal sequence, belonged to IXb subgroup of the ERF family. Further experiments demonstrated that GbERFb could bind the GCC box cis-acting element and interact with GbMAPKb (MAP kinase) directly in yeast. Over-expression of GbERFb in tobacco could increase the disease resistance to V. dahliae. The results suggest that the GbERFb, a new AP2/ERF transcription factor, could enhance the resistance to V. dahliae and be useful in improvement of crop resistance to pathogenes.
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Affiliation(s)
- Jianguang Liu
- Key Laboratory of Biology and Genetic Improvement of Cotton in Huanghuaihai Semiarid Area, Institute of Cotton, Hebei Academy of Agriculture and Forestry Sciences, No. 598 HePing West Road, Shi Jiazhuang, 050000 Hebei Province China
| | - Yongqiang Wang
- Key Laboratory of Biology and Genetic Improvement of Cotton in Huanghuaihai Semiarid Area, Institute of Cotton, Hebei Academy of Agriculture and Forestry Sciences, No. 598 HePing West Road, Shi Jiazhuang, 050000 Hebei Province China
| | - Guiyuan Zhao
- Key Laboratory of Biology and Genetic Improvement of Cotton in Huanghuaihai Semiarid Area, Institute of Cotton, Hebei Academy of Agriculture and Forestry Sciences, No. 598 HePing West Road, Shi Jiazhuang, 050000 Hebei Province China
| | - Junli Zhao
- Key Laboratory of Biology and Genetic Improvement of Cotton in Huanghuaihai Semiarid Area, Institute of Cotton, Hebei Academy of Agriculture and Forestry Sciences, No. 598 HePing West Road, Shi Jiazhuang, 050000 Hebei Province China
| | - Haiying Du
- Key Laboratory of Biology and Genetic Improvement of Cotton in Huanghuaihai Semiarid Area, Institute of Cotton, Hebei Academy of Agriculture and Forestry Sciences, No. 598 HePing West Road, Shi Jiazhuang, 050000 Hebei Province China
| | - Xiaoliang He
- School of Bioscience and Bioengineering, Hebei University of Science and Technology, Shi Jiazhuang, 050000 Hebei Province China
| | - Hanshuang Zhang
- Key Laboratory of Biology and Genetic Improvement of Cotton in Huanghuaihai Semiarid Area, Institute of Cotton, Hebei Academy of Agriculture and Forestry Sciences, No. 598 HePing West Road, Shi Jiazhuang, 050000 Hebei Province China
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Zhang N, McHale LK, Finer JJ. A Leader Intron of a Soybean Elongation Factor 1A (eEF1A) Gene Interacts with Proximal Promoter Elements to Regulate Gene Expression in Synthetic Promoters. PLoS One 2016; 11:e0166074. [PMID: 27806110 PMCID: PMC5091777 DOI: 10.1371/journal.pone.0166074] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2016] [Accepted: 10/21/2016] [Indexed: 11/18/2022] Open
Abstract
Introns, especially the first intron in the 5' untranslated region (5'UTR), can significantly impact gene expression via intron-mediated enhancement (IME). In this study, we demonstrate the leader intron of a soybean elongation factor 1A (eEF1A) gene (GmScreamM8) was essential for the high activity of the native promoter. Furthermore, the interaction of the GmScreamM8 leader intron with regulatory element sequences from several soybean eEF1A promoters was studied using synthetic promoters, which consisted of element tetramers upstream of a core promoter used to regulate a green fluorescent protein (gfp) reporter gene. Element tetramers, placed upstream of a GmScreamM8 core promoter, showed very high activity using both transient expression in lima bean cotyledons and stable expression in soybean hairy roots, only if the native leader intron was included, suggesting an interaction between intronic sequences and promoter elements. Partial deletions of the leader intron showed that a 222 bp intronic sequence significantly contributed to very high levels of GFP expression. Generation of synthetic intron variants with a monomeric or trimeric repeat of the 222 bp intronic sequence, yielded almost two-fold higher expression compared to the original intron, while partial deletion of the 222 bp intronic repeated sequence significantly decreased gene expression, indicating that this intronic sequence was essential for the intron-element interaction enhancement.
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Affiliation(s)
- Ning Zhang
- Department of Horticulture and Crop Science, The Ohio State University, Wooster, Ohio, United States of America
| | - Leah K. McHale
- Department of Horticulture and Crop Science, The Ohio State University, Columbus, Ohio, United States of America
| | - John J. Finer
- Department of Horticulture and Crop Science, The Ohio State University, Wooster, Ohio, United States of America
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