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Chang J, Li J, Li J, Chen X, Jiao J, Li J, Song Z, Zhang B. The GA and ABA signaling is required for hydrogen-mediated seed germination in wax gourd. BMC PLANT BIOLOGY 2024; 24:542. [PMID: 38872107 PMCID: PMC11177465 DOI: 10.1186/s12870-024-05193-3] [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: 04/23/2023] [Accepted: 05/23/2024] [Indexed: 06/15/2024]
Abstract
BACKGROUND Hydrogen gas (H2), a novel and beneficial gaseous molecule, plays a significant role in plant growth and development processes. Hydrogen-rich water (HRW) is regarded as a safe and easily available way to study the physiological effects of H2 on plants. Several recent research has shown that HRW attenuates stress-induced seed germination inhibition; however, the underlying modes of HRW on seed germination remain obscure under non-stress condition. RESULTS In this current study, we investigated the possible roles of gibberellin (GA) and abscisic acid (ABA) in HRW-regulated seed germination in wax gourd (Benincasa hispida) through pharmacological, physiological, and transcriptome approaches. The results showed that HRW application at an optimal dose (50% HRW) significantly promoted seed germination and shortened the average germination time (AGT). Subsequent results suggested that 50% HRW treatment stimulated GA production by regulating GA biosynthesis genes (BhiGA3ox, BhiGA2ox, and BhiKAO), whereas it had no effect on the content of ABA and the expression of its biosynthesis (BhiNCED6) and catabolism genes (BhiCYP707A2) but decreased the expression of ABA receptor gene (BhiPYL). In addition, inhibition of GA production by paclobutrazol (PAC) could block the HRW-mediated germination. Treatment with ABA could hinder HRW-mediated seed germination and the ABA biosynthesis inhibitor sodium tungstate (ST) could recover the function of HRW. Furthermore, RNA-seq analysis revealed that, in the presence of GA or ABA, an abundance of genes involved in GA, ABA, and ethylene signal sensing and transduction might involve in HRW-regulated germination. CONCLUSIONS This study portrays insights into the mechanism of HRW-mediated seed germination, suggesting that HRW can regulate the balance between GA and ABA to mediate seed germination through ethylene signals in wax gourd.
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Affiliation(s)
- Jingjing Chang
- Key Laboratory for New Technology Research of Vegetable, Vegetable Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640, China
| | - Jiawei Li
- Key Laboratory for New Technology Research of Vegetable, Vegetable Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640, China
| | - Jinlong Li
- Key Laboratory for New Technology Research of Vegetable, Vegetable Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640, China
| | - Xiao Chen
- Key Laboratory for New Technology Research of Vegetable, Vegetable Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640, China
| | - Jiabin Jiao
- Key Laboratory for New Technology Research of Vegetable, Vegetable Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640, China
| | - Jing Li
- Key Laboratory for New Technology Research of Vegetable, Vegetable Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640, China
| | - Zhao Song
- Key Laboratory for New Technology Research of Vegetable, Vegetable Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640, China
| | - Baige Zhang
- Key Laboratory for New Technology Research of Vegetable, Vegetable Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640, China.
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Evans KV, Ransom E, Nayakoti S, Wilding B, Mohd Salleh F, Gržina I, Erber L, Tse C, Hill C, Polanski K, Holland A, Bukhat S, Herbert RJ, de Graaf BHJ, Denby K, Buchanan-Wollaston V, Rogers HJ. Expression of the Arabidopsis redox-related LEA protein, SAG21 is regulated by ERF, NAC and WRKY transcription factors. Sci Rep 2024; 14:7756. [PMID: 38565965 PMCID: PMC10987515 DOI: 10.1038/s41598-024-58161-0] [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: 07/31/2023] [Accepted: 03/26/2024] [Indexed: 04/04/2024] Open
Abstract
SAG21/LEA5 is an unusual late embryogenesis abundant protein in Arabidopsis thaliana, that is primarily mitochondrially located and may be important in regulating translation in both chloroplasts and mitochondria. SAG21 expression is regulated by a plethora of abiotic and biotic stresses and plant growth regulators indicating a complex regulatory network. To identify key transcription factors regulating SAG21 expression, yeast-1-hybrid screens were used to identify transcription factors that bind the 1685 bp upstream of the SAG21 translational start site. Thirty-three transcription factors from nine different families bound to the SAG21 promoter, including members of the ERF, WRKY and NAC families. Key binding sites for both NAC and WRKY transcription factors were tested through site directed mutagenesis indicating the presence of cryptic binding sites for both these transcription factor families. Co-expression in protoplasts confirmed the activation of SAG21 by WRKY63/ABO3, and SAG21 upregulation elicited by oligogalacturonide elicitors was partially dependent on WRKY63, indicating its role in SAG21 pathogen responses. SAG21 upregulation by ethylene was abolished in the erf1 mutant, while wound-induced SAG21 expression was abolished in anac71 mutants, indicating SAG21 expression can be regulated by several distinct transcription factors depending on the stress condition.
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Affiliation(s)
- Kelly V Evans
- School of Biosciences, Cardiff University, Sir Martin Evans Building, Museum Avenue, Cardiff, CF10 3AT, UK
| | - Elspeth Ransom
- School of Biosciences, Cardiff University, Sir Martin Evans Building, Museum Avenue, Cardiff, CF10 3AT, UK
| | - Swapna Nayakoti
- School of Biosciences, Cardiff University, Sir Martin Evans Building, Museum Avenue, Cardiff, CF10 3AT, UK
| | - Ben Wilding
- School of Biosciences, Cardiff University, Sir Martin Evans Building, Museum Avenue, Cardiff, CF10 3AT, UK
| | - Faezah Mohd Salleh
- School of Biosciences, Cardiff University, Sir Martin Evans Building, Museum Avenue, Cardiff, CF10 3AT, UK
- Investigative and Forensic Sciences Research Group, Universiti Teknologi Malaysia, 81310, Johor Bahru, Johor, Malaysia
| | - Irena Gržina
- School of Biosciences, Cardiff University, Sir Martin Evans Building, Museum Avenue, Cardiff, CF10 3AT, UK
| | - Lieselotte Erber
- School of Biosciences, Cardiff University, Sir Martin Evans Building, Museum Avenue, Cardiff, CF10 3AT, UK
| | - Carmen Tse
- School of Biosciences, Cardiff University, Sir Martin Evans Building, Museum Avenue, Cardiff, CF10 3AT, UK
| | - Claire Hill
- School of Life Sciences, University of Warwick, Coventry, CV4 7AL, UK
| | | | - Alistair Holland
- School of Biosciences, Cardiff University, Sir Martin Evans Building, Museum Avenue, Cardiff, CF10 3AT, UK
| | - Sherien Bukhat
- School of Biosciences, Cardiff University, Sir Martin Evans Building, Museum Avenue, Cardiff, CF10 3AT, UK
| | - Robert J Herbert
- School of Science and the Environment, University of Worcester, Henwick Grove, Worcester, WR2 6AJ, UK
| | - Barend H J de Graaf
- School of Biosciences, Cardiff University, Sir Martin Evans Building, Museum Avenue, Cardiff, CF10 3AT, UK
| | - Katherine Denby
- Department of Biology, Centre for Novel Agricultural Products (CNAP), University of York, Heslington, York, YO10 5DD, UK
| | | | - Hilary J Rogers
- School of Biosciences, Cardiff University, Sir Martin Evans Building, Museum Avenue, Cardiff, CF10 3AT, UK.
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3
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Ma Z, Hu L, Jiang W. Understanding AP2/ERF Transcription Factor Responses and Tolerance to Various Abiotic Stresses in Plants: A Comprehensive Review. Int J Mol Sci 2024; 25:893. [PMID: 38255967 PMCID: PMC10815832 DOI: 10.3390/ijms25020893] [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: 12/13/2023] [Revised: 01/04/2024] [Accepted: 01/09/2024] [Indexed: 01/24/2024] Open
Abstract
Abiotic stress is an adverse environmental factor that severely affects plant growth and development, and plants have developed complex regulatory mechanisms to adapt to these unfavourable conditions through long-term evolution. In recent years, many transcription factor families of genes have been identified to regulate the ability of plants to respond to abiotic stresses. Among them, the AP2/ERF (APETALA2/ethylene responsive factor) family is a large class of plant-specific proteins that regulate plant response to abiotic stresses and can also play a role in regulating plant growth and development. This paper reviews the structural features and classification of AP2/ERF transcription factors that are involved in transcriptional regulation, reciprocal proteins, downstream genes, and hormone-dependent signalling and hormone-independent signalling pathways in response to abiotic stress. The AP2/ERF transcription factors can synergise with hormone signalling to form cross-regulatory networks in response to and tolerance of abiotic stresses. Many of the AP2/ERF transcription factors activate the expression of abiotic stress-responsive genes that are dependent or independent of abscisic acid and ethylene in response to abscisic acid and ethylene. In addition, the AP2/ERF transcription factors are involved in gibberellin, auxin, brassinosteroid, and cytokinin-mediated abiotic stress responses. The study of AP2/ERF transcription factors and interacting proteins, as well as the identification of their downstream target genes, can provide us with a more comprehensive understanding of the mechanism of plant action in response to abiotic stress, which can improve plants' ability to tolerate abiotic stress and provide a more theoretical basis for increasing plant yield under abiotic stress.
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Affiliation(s)
- Ziming Ma
- Jilin Provincial Engineering Laboratory of Plant Genetic Improvement, College of Plant Science, Jilin University, Changchun 130062, China;
- Max-Planck-Institute of Molecular Plant Physiology, Am Muehlenberg 1, 14476 Potsdam-Golm, Germany
- Plant Genetics, TUM School of Life Sciences, Technical University of Munich (TUM), Emil Ramann Str. 4, 85354 Freising, Germany
| | - Lanjuan Hu
- Jilin Provincial Engineering Laboratory of Plant Genetic Improvement, College of Plant Science, Jilin University, Changchun 130062, China;
| | - Wenzhu Jiang
- Jilin Provincial Engineering Laboratory of Plant Genetic Improvement, College of Plant Science, Jilin University, Changchun 130062, China;
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4
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Park S, Shi A, Meinhardt LW, Mou B. Genome-wide characterization and evolutionary analysis of the AP2/ERF gene family in lettuce (Lactuca sativa). Sci Rep 2023; 13:21990. [PMID: 38081919 PMCID: PMC10713603 DOI: 10.1038/s41598-023-49245-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Accepted: 12/06/2023] [Indexed: 12/18/2023] Open
Abstract
The APETALA2/ETHYLENE RESPONSIVE FACTOR (AP2/ERF) gene family plays vital roles in plants, serving as a key regulator in responses to abiotic stresses. Despite its significance, a comprehensive understanding of this family in lettuce remains incomplete. In this study, we performed a genome-wide search for the AP2/ERF family in lettuce and identified a total of 224 members. The duplication patterns provided evidence that both tandem and segmental duplications contributed to the expansion of this family. Ka/Ks ratio analysis demonstrated that, following duplication events, the genes have been subjected to purifying selection pressure, leading to selective constraints on their protein sequence. This selective pressure provides a dosage benefit against stresses in plants. Additionally, a transcriptome analysis indicated that some duplicated genes gained novel functions, emphasizing the contribution of both dosage effect and functional divergence to the family functionalities. Furthermore, an orthologous relationship study showed that 60% of genes descended from a common ancestor of Rosid and Asterid lineages, 28% from the Asterid ancestor, and 12% evolved in the lettuce lineage, suggesting lineage-specific roles in adaptive evolution. These results provide valuable insights into the evolutionary mechanisms of the AP2/ERF gene family in lettuce, with implications for enhancing abiotic stress tolerance, ultimately contributing to the genetic improvement of lettuce crop production.
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Affiliation(s)
- Sunchung Park
- US Department of Agriculture, Agricultural Research Service, Beltsville, MD, 20705, USA.
| | - Ainong Shi
- Horticulture Department, University of Arkansas, Fayetteville, AR, 72701, USA
| | - Lyndel W Meinhardt
- US Department of Agriculture, Agricultural Research Service, Beltsville, MD, 20705, USA
| | - Beiquan Mou
- US Department of Agriculture, Agricultural Research Service, Salinas, CA, 93905, USA
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Zhang P, He R, Yang J, Cai J, Qu Z, Yang R, Gu J, Wang ZY, Adelson DL, Zhu Y, Cao X, Wang D. The long non-coding RNA DANA2 positively regulates drought tolerance by recruiting ERF84 to promote JMJ29-mediated histone demethylation. MOLECULAR PLANT 2023; 16:1339-1353. [PMID: 37553833 DOI: 10.1016/j.molp.2023.08.001] [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: 11/23/2022] [Revised: 06/15/2023] [Accepted: 08/02/2023] [Indexed: 08/10/2023]
Abstract
Tens of thousands of long non-coding RNAs have been uncovered in plants, but few of them have been comprehensively studied for their biological function and molecular mechanism of their mode of action. Here, we show that the Arabidopsis long non-coding RNA DANA2 interacts with an AP2/ERF transcription factor ERF84 in the cell nucleus and then affects the transcription of JMJ29 that encodes a Jumonji C domain-containing histone H3K9 demethylase. Both RNA sequencing (RNA-seq) and genetic analyses demonstrate that DANA2 positively regulates drought stress responses through JMJ29. JMJ29 positively regulates the expression of ERF15 and GOLS2 by modulation of H3K9me2 demethylation. Accordingly, mutation of JMJ29 causes decreased ERF15 and GOLS2 expression, resulting in impaired drought tolerance, in agreement with drought-sensitive phenotypes of dana2 and erf84 mutants. Taken together, these results demonstrate that DANA2 is a positive regulator of drought response and works jointly with the transcriptional activator ERF84 to modulate JMJ29 expression in plant response to drought.
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Affiliation(s)
- Pengxiang Zhang
- Key Laboratory of Molecular Biology and Gene Engineering in Jiangxi Province, College of Life Science, Nanchang University, Jiangxi 330031, China
| | - Reqing He
- Key Laboratory of Molecular Biology and Gene Engineering in Jiangxi Province, College of Life Science, Nanchang University, Jiangxi 330031, China
| | - Jun Yang
- Key Laboratory of Molecular Biology and Gene Engineering in Jiangxi Province, College of Life Science, Nanchang University, Jiangxi 330031, China
| | - Jingjing Cai
- Key Laboratory of Molecular Biology and Gene Engineering in Jiangxi Province, College of Life Science, Nanchang University, Jiangxi 330031, China
| | - Zhipeng Qu
- Department of Molecular and Biomedical Science, School of Biological Sciences, The University of Adelaide, Adelaide, SA 5005, Australia
| | - Rongxin Yang
- Key Laboratory of Molecular Biology and Gene Engineering in Jiangxi Province, College of Life Science, Nanchang University, Jiangxi 330031, China
| | - Jinbao Gu
- Institute of Nanfan & Seed Industry, Guangdong Academy of Sciences, Guangdong 510316, China
| | - Zhen-Yu Wang
- Institute of Nanfan & Seed Industry, Guangdong Academy of Sciences, Guangdong 510316, China
| | - David L Adelson
- Department of Molecular and Biomedical Science, School of Biological Sciences, The University of Adelaide, Adelaide, SA 5005, Australia
| | - Youlin Zhu
- Key Laboratory of Molecular Biology and Gene Engineering in Jiangxi Province, College of Life Science, Nanchang University, Jiangxi 330031, China
| | - Xiaofeng Cao
- State Key Laboratory of Plant Genomics and National Center for Plant Gene Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100039, China.
| | - Dong Wang
- Key Laboratory of Molecular Biology and Gene Engineering in Jiangxi Province, College of Life Science, Nanchang University, Jiangxi 330031, China.
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6
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Guo Z, He L, Sun X, Li C, Su J, Zhou H, Liu X. Genome-Wide Analysis of the Rhododendron AP2/ERF Gene Family: Identification and Expression Profiles in Response to Cold, Salt and Drought Stress. PLANTS (BASEL, SWITZERLAND) 2023; 12:994. [PMID: 36903855 PMCID: PMC10005251 DOI: 10.3390/plants12050994] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Revised: 02/20/2023] [Accepted: 02/20/2023] [Indexed: 06/18/2023]
Abstract
The AP2/ERF gene family is one of the most conserved and important transcription factor families mainly occurring in plants with various functions in regulating plant biological and physiological processes. However, little comprehensive research has been conducted on the AP2/ERF gene family in Rhododendron (specifically, Rhododendron simsii), an important ornamental plant. The existing whole-genome sequence of Rhododendron provided data to investigate the AP2/ERF genes in Rhododendron on a genome-wide scale. A total of 120 Rhododendron AP2/ERF genes were identified. The phylogenetic analysis showed that RsAP2 genes were classified into five main subfamilies, AP2, ERF, DREB, RAV and soloist. Cis-acting elements involving plant growth regulators, response to abiotic stress and MYB binding sites were detected in the upstream sequences of RsAP2 genes. A heatmap of RsAP2 gene expression levels showed that these genes had different expression patterns in the five developmental stages of Rhododendron flowers. Twenty RsAP2 genes were selected for quantitative RT-PCR experiments to clarify the expression level changes under cold, salt and drought stress treatments, and the results showed that most of the RsAP2 genes responded to these abiotic stresses. This study generated comprehensive information on the RsAP2 gene family and provides a theoretical basis for future genetic improvement.
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Affiliation(s)
- Zhenhao Guo
- Institute of Leisure Agriculture, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
- Jiangsu Key Laboratory for Horticultural Crop Genetic Improvement, Nanjing 210014, China
| | - Lisi He
- Institute of Leisure Agriculture, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
- Jiangsu Key Laboratory for Horticultural Crop Genetic Improvement, Nanjing 210014, China
| | - Xiaobo Sun
- Institute of Leisure Agriculture, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
- Jiangsu Key Laboratory for Horticultural Crop Genetic Improvement, Nanjing 210014, China
| | - Chang Li
- Institute of Leisure Agriculture, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
- Jiangsu Key Laboratory for Horticultural Crop Genetic Improvement, Nanjing 210014, China
| | - Jiale Su
- Institute of Leisure Agriculture, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
- Jiangsu Key Laboratory for Horticultural Crop Genetic Improvement, Nanjing 210014, China
| | - Huimin Zhou
- Institute of Leisure Agriculture, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
- Jiangsu Key Laboratory for Horticultural Crop Genetic Improvement, Nanjing 210014, China
| | - Xiaoqing Liu
- Institute of Leisure Agriculture, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
- Jiangsu Key Laboratory for Horticultural Crop Genetic Improvement, Nanjing 210014, China
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7
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Xiao L, Ren JZ, Li Q, Yang B, Liu ZJ, Chen RB, Zhang L. Genome-wide analysis of AP2/ERF superfamily in Isatis indigotica. JOURNAL OF INTEGRATIVE MEDICINE 2023; 21:77-88. [PMID: 36192353 DOI: 10.1016/j.joim.2022.09.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Accepted: 05/09/2022] [Indexed: 01/20/2023]
Abstract
OBJECTIVE AP2/ERF (APETALA2/ethylene-responsive factor) superfamily is one of the largest gene families in plants and has been reported to participate in various biological processes, such as the regulation of biosynthesis of active lignan. However, few studies have investigated the genome-wide role of the AP2/ERF superfamily in Isatis indigotica. This study establishes a complete picture of the AP2/ERF superfamily in I. indigotica and contributes valuable information for further functional characterization of IiAP2/ERF genes and supports further metabolic engineering. METHODS To identify the IiAP2/ERF superfamily genes, the AP2/ERF sequences from Arabidopsis thaliana and Brassica rapa were used as query sequences in the basic local alignment search tool. Bioinformatic analyses were conducted to investigate the protein structure, motif composition, chromosome location, phylogenetic relationship, and interaction network of the IiAP2/ERF superfamily genes. The accuracy of omics data was verified by quantitative polymerase chain reaction and heatmap analyses. RESULTS One hundred and twenty-six putative IiAP2/ERF genes in total were identified from the I. indigotica genome database in this study. By sequence alignment and phylogenetic analysis, the IiAP2/ERF genes were classified into 5 groups including AP2, ERF, DREB (dehydration-responsive element-binding factor), Soloist and RAV (related to abscisic acid insensitive 3/viviparous 1) subfamilies. Among which, 122 members were unevenly distributed across seven chromosomes. Sequence alignment showed that I. indigotica and A. thaliana had 30 pairs of orthologous genes, and we constructed their interaction network. The comprehensive analysis of gene expression pattern in different tissues suggested that these genes may play a significant role in organ growth and development of I. indigotica. Members that may regulate lignan biosynthesis in roots were also preliminarily identified. Ribonucleic acid sequencing analysis revealed that the expression of 76 IiAP2/ERF genes were up- or down-regulated under salt or drought treatment, among which, 33 IiAP2/ERF genes were regulated by both stresses. CONCLUSION This study undertook a genome-wide characterization of the AP2/ERF superfamily in I. indigotica, providing valuable information for further functional characterization of IiAP2/ERF genes and discovery of genetic targets for metabolic engineering.
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Affiliation(s)
- Liang Xiao
- Department of Pharmaceutical Botany, School of Pharmacy, Naval Medical University, Shanghai 200433, China; Medical School of Nantong University, Nantong 226001, Jiangsu Province, China
| | - Jun-Ze Ren
- Department of Pharmaceutical Botany, School of Pharmacy, Naval Medical University, Shanghai 200433, China
| | - Qing Li
- Department of Pharmacy, Changzheng Hospital, Naval Medical University, Shanghai 200433, China
| | - Bin Yang
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, China
| | - Zhen-Jiang Liu
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, China
| | - Rui-Bing Chen
- Department of Pharmaceutical Botany, School of Pharmacy, Naval Medical University, Shanghai 200433, China.
| | - Lei Zhang
- Department of Pharmaceutical Botany, School of Pharmacy, Naval Medical University, Shanghai 200433, China; Medical School of Nantong University, Nantong 226001, Jiangsu Province, China.
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Yang B, Sun S, Li S, Zeng J, Xu F. RNA-seq study reveals the signaling and carbohydrate metabolism regulators involved in dormancy release by warm stratification in Paris polyphylla var. yunnanensis. PLANT BIOTECHNOLOGY (TOKYO, JAPAN) 2022; 39:355-365. [PMID: 37283615 PMCID: PMC10240920 DOI: 10.5511/plantbiotechnology.22.0824a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2022] [Accepted: 08/24/2022] [Indexed: 06/08/2023]
Abstract
Long-term seed dormancy of Paris polyphylla var. yunnanensis limits its large-scale artificial cultivation. It is crucial to understand the regulatory genes involving in dormancy release for artificial cultivation in this species. In this study, seed dormancy of Paris polyphylla var. yunnanensis was effectively released by warm stratification (20°C) for 90 days. The freshly harvested seeds (dormant) and stratified seeds (non-dormant) were used to sequence, and approximately 147 million clean reads and 28,083 annotated unigenes were detected. In which, a total of 10,937 differentially expressed genes (DEGs) were identified between dormant and non-dormant seeds. Gene ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) classification revealed that the majority unigenes involved in signaling transduction and carbohydrate metabolism. Of them, the signaling transduction-related DEGs were mainly hormones-, reactive oxygen species (ROS)-, and transcription factor (TF)-related genes. The largest number of signaling transduction-related DEGs were auxin-responsive genes (SAUR, AUX/IAA, and ARF) and AP2-like ethylene-responsive transcription factor (ERF/AP2). Moreover, at least 29 DEGs such as α-amylase (AMY), β-glucosidase (Bglb/Bglu/Bglx), and endoglucanase (Glu) were identified involving in carbohydrate metabolism. These identified genes provide a valuable resource to investigate the molecular basis of dormancy release in Paris polyphylla var. yunnanensis.
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Affiliation(s)
- Bin Yang
- Guangzhou Key Laboratory for Research and Development of Crop Germplasm Resources, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China
| | - Shan Sun
- The Laboratory of Seed Science and Technology, Guangdong Key Laboratory of Plant Molecular Breeding, State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou 510642, China
| | - Shengyu Li
- Guangzhou Key Laboratory for Research and Development of Crop Germplasm Resources, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China
| | - Jiali Zeng
- Guangzhou Key Laboratory for Research and Development of Crop Germplasm Resources, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China
| | - Furong Xu
- College of Traditional Chinese Medicine, Yunnan University of Chinese Medicine, Kunming 650500, China
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9
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Muto A, Bruno L, Madeo ML, Ludlow R, Ferrari M, Stimpson L, LoGiudice C, Picardi E, Ferrante A, Pasti L, Müller CT, Chiappetta AAC, Rogers HJ, Bitonti MB, Spadafora ND. Comparative transcriptomic profiling of peach and nectarine cultivars reveals cultivar-specific responses to chilled postharvest storage. FRONTIERS IN PLANT SCIENCE 2022; 13:1062194. [PMID: 36507427 PMCID: PMC9733835 DOI: 10.3389/fpls.2022.1062194] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Accepted: 11/07/2022] [Indexed: 06/12/2023]
Abstract
INTRODUCTION Peach (Prunus persica (L.) Batsch,) and nectarine fruits (Prunus persica (L.) Batsch, var nectarine), are characterized by a rapid deterioration at room temperature. Therefore, cold storage is widely used to delay fruit post-harvest ripening and extend fruit commercial life. Physiological disorders, collectively known as chilling injury, can develop typically after 3 weeks of low-temperature storage and affect fruit quality. METHODS A comparative transcriptomic analysis was performed to identify regulatory pathways that develop before chilling injury symptoms are detectable using next generation sequencing on the fruits of two contrasting cultivars, one peach (Sagittaria) and one nectarine, (Big Top), over 14 days of postharvest cold storage. RESULTS There was a progressive increase in the number of differentially expressed genes between time points (DEGs) in both cultivars. More (1264) time point DEGs were identified in 'Big Top' compared to 'Sagittaria' (746 DEGs). Both cultivars showed a downregulation of pathways related to photosynthesis, and an upregulation of pathways related to amino sugars, nucleotide sugar metabolism and plant hormone signal transduction with ethylene pathways being most affected. Expression patterns of ethylene related genes (including biosynthesis, signaling and ERF transcription factors) correlated with genes involved in cell wall modification, membrane composition, pathogen and stress response, which are all involved later during storage in development of chilling injury. DISCUSSION Overall, the results show that common pathways are activated in the fruit of 'Big Top' nectarine and 'Sagittaria' peach in response to cold storage but include also differences that are cultivar-specific responses.
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Affiliation(s)
- Antonella Muto
- Department of Biology, Ecology and Earth Sciences, University of Calabria, Cosenza, Italy
| | - Leonardo Bruno
- Department of Biology, Ecology and Earth Sciences, University of Calabria, Cosenza, Italy
| | - Maria Letizia Madeo
- Department of Biology, Ecology and Earth Sciences, University of Calabria, Cosenza, Italy
| | - Richard Ludlow
- School of Biosciences, Cardiff University, Cardiff, United Kingdom
| | - Michele Ferrari
- Department of Biology, Ecology and Earth Sciences, University of Calabria, Cosenza, Italy
| | - Louise Stimpson
- Department of Biology, Ecology and Earth Sciences, University of Calabria, Cosenza, Italy
- School of Biosciences, Cardiff University, Cardiff, United Kingdom
| | - Claudio LoGiudice
- Department of Biosciences, Biotechnology and Biopharmaceutics, University of Bari, Bari, Italy
- Institute of Biomembranes, Bioenergetics and Molecular Biotechnologies, Consiglio Nazionale delle Ricerche, Bari, Italy
| | - Ernesto Picardi
- Department of Biosciences, Biotechnology and Biopharmaceutics, University of Bari, Bari, Italy
- Institute of Biomembranes, Bioenergetics and Molecular Biotechnologies, Consiglio Nazionale delle Ricerche, Bari, Italy
| | - Antonio Ferrante
- Department of Agricultural and Environmental Science, Università degli Studi di Milano, Milan, Italy
| | - Luisa Pasti
- Department of Environment and Prevention Sciences, University of Ferrara, Ferrara, Italy
| | | | | | - Hilary J. Rogers
- School of Biosciences, Cardiff University, Cardiff, United Kingdom
| | - Maria Beatrice Bitonti
- Department of Biology, Ecology and Earth Sciences, University of Calabria, Cosenza, Italy
| | - Natasha Damiana Spadafora
- Department of Biology, Ecology and Earth Sciences, University of Calabria, Cosenza, Italy
- Department of Chemical, Pharmaceutical and Agricultural Sciences, University of Ferrara, Ferrara, Italy
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10
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Xu X, Guerriero G, Berni R, Sergeant K, Guignard C, Lenouvel A, Hausman JF, Legay S. MdMYB52 regulates lignin biosynthesis upon the suberization process in apple. FRONTIERS IN PLANT SCIENCE 2022; 13:1039014. [PMID: 36275517 PMCID: PMC9583409 DOI: 10.3389/fpls.2022.1039014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Accepted: 09/20/2022] [Indexed: 06/16/2023]
Abstract
Our previous studies, comparing russeted vs. waxy apple skin, highlighted a MYeloBlastosys (Myb) transcription factor (MdMYB52), which displayed a correlation with genes associated to the suberization process. The present article aims to assess its role and function in the suberization process. Phylogenetic analyses and research against Arabidopsis thaliana MYBs database were first performed and the tissue specific expression of MdMYB52 was investigated using RT-qPCR. The function of MdMYB52 was further investigated using Agrobacterium-mediated transient overexpression in Nicotiana benthamiana leaves. An RNA-Seq analysis was performed to highlight differentially regulated genes in response MdMYB52. Transcriptomic data were supported by analytical chemistry and microscopy. A massive decreased expression of photosynthetic and primary metabolism pathways was observed with a concomitant increased expression of genes associated with phenylpropanoid and lignin biosynthesis, cell wall modification and senescence. Interestingly key genes involved in the synthesis of suberin phenolic components were observed. The analytical chemistry displayed a strong increase in the lignin content in the cell walls during MdMYB52 expression. More specifically, an enrichment in G-Unit lignin residues was observed, supporting transcriptomic data as well as previous work describing the suberin phenolic domain as a G-unit enriched lignin-like polymer. The time-course qPCR analysis revealed that the observed stress response, might be explain by this lignin biosynthesis and by a possible programmed senescence triggered by MdMYB52. The present work supports a crucial regulatory role for MdMYB52 in the biosynthesis of the suberin phenolic domain and possibly in the fate of suberized cells in russeted apple skins.
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11
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Blair EJ, Goralogia GS, Lincoln MJ, Imaizumi T, Nagel DH. Clock-Controlled and Cold-Induced CYCLING DOF FACTOR6 Alters Growth and Development in Arabidopsis. FRONTIERS IN PLANT SCIENCE 2022; 13:919676. [PMID: 35958204 PMCID: PMC9361860 DOI: 10.3389/fpls.2022.919676] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Accepted: 06/23/2022] [Indexed: 06/15/2023]
Abstract
The circadian clock represents a critical regulatory network, which allows plants to anticipate environmental changes as inputs and promote plant survival by regulating various physiological outputs. Here, we examine the function of the clock-regulated transcription factor, CYCLING DOF FACTOR 6 (CDF6), during cold stress in Arabidopsis thaliana. We found that the clock gates CDF6 transcript accumulation in the vasculature during cold stress. CDF6 mis-expression results in an altered flowering phenotype during both ambient and cold stress. A genome-wide transcriptome analysis links CDF6 to genes associated with flowering and seed germination during cold and ambient temperatures, respectively. Analysis of key floral regulators indicates that CDF6 alters flowering during cold stress by repressing photoperiodic flowering components, FLOWERING LOCUS T (FT), CONSTANS (CO), and BROTHER OF FT (BFT). Gene ontology enrichment further suggests that CDF6 regulates circadian and developmental-associated genes. These results provide insights into how the clock-controlled CDF6 modulates plant development during moderate cold stress.
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Affiliation(s)
- Emily J. Blair
- Department of Botany and Plant Sciences, University of California, Riverside, Riverside, CA, United States
| | - Greg S. Goralogia
- Department of Biology, University of Washington, Seattle, WA, United States
| | - Matthew J. Lincoln
- Department of Biology, University of Washington, Seattle, WA, United States
| | - Takato Imaizumi
- Department of Biology, University of Washington, Seattle, WA, United States
| | - Dawn H. Nagel
- Department of Botany and Plant Sciences, University of California, Riverside, Riverside, CA, United States
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12
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Xiao M, Feng YN, Sun PW, Xu Y, Rong M, Liu Y, Jiang JM, Yu CC, Gao ZH, Wei J. Genome-wide Investigation and Expression Analysis of the AP2/ERF Family for Selection of Agarwood Related Genes in Aquilaria sinensis (Lour.) Gilg. Genome 2022; 65:443-457. [PMID: 35849843 DOI: 10.1139/gen-2022-0003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Aquilaria sinensis is an important non-timber tree species for producing high-value agarwood, which is widely used as a traditional medicine and incense. Agarwood is the product of Aquilaria trees in response to injury and fungal infection. AP2/ERF transcription factors play important roles in plant stress responses and metabolite biosynthesis. In this study, 119 AsAP2/ERF genes were identified from the A. sinensis genome and divided into ERF, AP2, RAV and Soloist subfamilies. Their conserved motif, gene structure, chromosomal localization, and subcellular localization were characterized. A stress/defense-related ERF-associated amphiphilic repression (EAR) motif and an EDLL motif were identified. Moreover, 11 genes that were highly expressed in the agarwood layer in response to whole-tree agarwood induction technique (Agar-Wit) treatment were chosen, and their expression levels in response to MeJA, SA or salt treatment were further analyzed using qRT-PCR. Among the 11 genes, eight belonged to subgroup B-3. All 11 genes were significantly upregulated under salt treatment, while eight genes were significantly induced by both MeJA and SA. In addition, the gene clusters containing these upregulated genes on chromosomes were observed. The results obtained from this research not only provide useful information for understanding the functions of AP2/ERF genes in A. sinensis but also identify candidate genes and gene clusters to dissect their regulatory roles in agarwood formation for future research.
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Affiliation(s)
- Mengjun Xiao
- Chinese Academy of Medical Sciences & Peking Union Medical College, 12501, Institute of Medicinal Plant Development, Beijing, Beijing, China;
| | - Ya-Nan Feng
- Shanxi Agricultural University, 74600, Taiyuan, Shanxi , China;
| | - Pei-Wen Sun
- Chinese Academy of Medical Sciences & Peking Union Medical College, 12501, Institute of Medicinal Plant Development, Beijing, Beijing, China;
| | - Yanhong Xu
- Chinese Academy of Medical Sciences & Peking Union Medical College, 12501, Institute of Medicinal Plant Development, Beijing, Beijing, China;
| | - Mei Rong
- Chinese Academy of Medical Sciences & Peking Union Medical College, 12501, Institute of Medicinal Plant Development, Beijing, Beijing, China;
| | - Yang Liu
- Chinese Academy of Medical Sciences & Peking Union Medical College, 12501, Institute of Medicinal Plant Development, Beijing, Beijing, China;
| | - Jie-Mei Jiang
- Chinese Academy of Medical Sciences & Peking Union Medical College, 12501, Institute of Medicinal Plant Development, Beijing, Beijing, China;
| | - Cui-Cui Yu
- Chinese Academy of Medical Sciences & Peking Union Medical College, 12501, Institute of Medicinal Plant Development, Beijing, Beijing, China;
| | - Zhi-Hui Gao
- Chinese Academy of Medical Sciences & Peking Union Medical College, 12501, Institute of Medicinal Plant Development, Beijing, Beijing, China;
| | - Jianhe Wei
- Chinese Academy of Medical Sciences & Peking Union Medical College, 12501, Institute of Medicinal Plant Development, Beijing, Beijing, China.,Peking Union Medical College, Hainan Branch of the Institute of Medicinal Plant Development, Haikou, China;
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13
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Martin RC, Kronmiller BA, Dombrowski JE. Transcriptome Analysis of Lolium temulentum Exposed to a Combination of Drought and Heat Stress. PLANTS (BASEL, SWITZERLAND) 2021; 10:plants10112247. [PMID: 34834610 PMCID: PMC8621252 DOI: 10.3390/plants10112247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Revised: 10/14/2021] [Accepted: 10/15/2021] [Indexed: 06/13/2023]
Abstract
Drought and heat are two major stresses predicted to increase in the future due to climate change. Plants exposed to multiple stressors elicit unique responses from those observed under individual stresses. A comparative transcriptome analysis of Lolium temulentum exposed to drought plus heat and non-stressed control plants revealed 20,221 unique up-regulated and 17,034 unique down-regulated differentially regulated transcripts. Gene ontology analysis revealed a strong emphasis on transcriptional regulation, protein folding, cell cycle/parts, organelles, binding, transport, signaling, oxidoreductase, and antioxidant activity. Differentially expressed genes (DEGs) encoding for transcriptional control proteins such as basic leucine zipper, APETALA2/Ethylene Responsive Factor, NAC, and WRKY transcription factors, and Zinc Finger (CCCH type and others) proteins were more often up-regulated, while DEGs encoding Basic Helix-Loop-Helix, MYB and GATA transcription factors, and C2H2 type Zinc Finger proteins were more often down-regulated. The DEGs encoding heat shock transcription factors were only up-regulated. Of the hormones, auxin-related DEGs were the most prevalent, encoding for auxin response factors, binding proteins, and efflux/influx carriers. Gibberellin-, cytokinin- and ABA-related DEGs were also prevalent, with fewer DEGs related to jasmonates and brassinosteroids. Knowledge of genes/pathways that grasses use to respond to the combination of heat/drought will be useful in developing multi-stress resistant grasses.
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Affiliation(s)
- Ruth C. Martin
- USDA-ARS, National Forage Seed Production Research Center, 3450 SW Campus Way, Corvallis, OR 97331-7102, USA;
| | - Brent A. Kronmiller
- Center for Quantitative Life Sciences, Department of Botany and Plant Pathology, Oregon State University, Corvallis, OR 97331-7102, USA;
| | - James E. Dombrowski
- USDA-ARS, National Forage Seed Production Research Center, 3450 SW Campus Way, Corvallis, OR 97331-7102, USA;
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14
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Li D, He Y, Li S, Shi S, Li L, Liu Y, Chen H. Genome-wide characterization and expression analysis of AP2/ERF genes in eggplant (Solanum melongena L.). PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2021; 167:492-503. [PMID: 34425394 DOI: 10.1016/j.plaphy.2021.08.006] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Revised: 08/03/2021] [Accepted: 08/05/2021] [Indexed: 05/20/2023]
Abstract
The AP2/ERF (APETALA2/Ethylene Response Factor) transcription factor superfamily plays crucial roles in a slew of physiological processes, such as plant growth and development, stress response, and secondary metabolites biosynthesis. Eggplant, especially the one rich with anthocyanins, is an economically important horticultural vegetable cultivated worldwide. In this study, we comprehensively analyzed the putative AP2/ERF gene family members and their response to abiotic stress in eggplant. As per the phylogenetic, conserved domains, and motif analysis, 178 AP2/ERF genes in this study belonged to five subfamilies. Chromosomal distributions analysis elucidated stochastic distribution of 178 putative SmAP2/ERF genes across the twelve chromosomes of eggplant. Expression profiles of sixteen selected AP2/ERF genes response to low temperature, drought, salt, abscisic acid, and ethylene treatments were analyzed, which revealed the involvement of SmAP2/ERF genes in diverse signaling pathways. In addition, we integrated RNA-Seq data on anthocyanin biosynthesis in eggplant with yeast one-hybrid and dual-luciferase assays and identified involvement of the SmAP2/ERF genes (Smechr0902114.1 and Smechr1102075.1) in the regulation of anthocyanin biosynthesis. This study will enable further functional characterization of AP2/ERF genes in eggplant and extend the current understanding of the role played by AP2/ERF genes in anthocyanin biosynthesis regulation.
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Affiliation(s)
- Dalu Li
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, 200240, China.
| | - YongJun He
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, 200240, China.
| | - Shaohang Li
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, 200240, China.
| | - Suli Shi
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, 200240, China.
| | - Linzhi Li
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, 200240, China.
| | - Yang Liu
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, 200240, China.
| | - Huoying Chen
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, 200240, China.
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15
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Lu L, Qanmber G, Li J, Pu M, Chen G, Li S, Liu L, Qin W, Ma S, Wang Y, Chen Q, Liu Z. Identification and Characterization of the ERF Subfamily B3 Group Revealed GhERF13.12 Improves Salt Tolerance in Upland Cotton. FRONTIERS IN PLANT SCIENCE 2021; 12:705883. [PMID: 34434208 PMCID: PMC8382128 DOI: 10.3389/fpls.2021.705883] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Accepted: 07/05/2021] [Indexed: 06/12/2023]
Abstract
The APETALA2 (AP2)/ethylene response factor plays vital functions in response to environmental stimulus. The ethylene response factor (ERF) subfamily B3 group belongs to the AP2/ERF superfamily and contains a single AP2/ERF domain. Phylogenetic analysis of the ERF subfamily B3 group genes from Arabdiposis thaliana, Gossypium arboreum, Gossypium hirsutum, and Gossypium raimondii made it possible to divide them into three groups and showed that the ERF subfamily B3 group genes are conserved in cotton. Collinearity analysis identified172 orthologous/paralogous gene pairs between G. arboreum and G. hirsutum; 178 between G. hirsutum and G. raimondii; and 1,392 in G. hirsutum. The GhERF subfamily B3 group gene family experienced massive gene family expansion through either segmental or whole genome duplication events, with most genes showing signature compatible with the action of purifying selection during evolution. Most G. hirsutum ERF subfamily B3 group genes are responsive to salt stress. GhERF13.12 transgenic Arabidopsis showed enhanced salt stress tolerance and exhibited regulation of related biochemical parameters and enhanced expression of genes participating in ABA signaling, proline biosynthesis, and ROS scavenging. In addition, the silencing of the GhERF13.12 gene leads to increased sensitivity to salt stress in cotton. These results indicate that the ERF subfamily B3 group had remained conserved during evolution and that GhERF13.12 induces salt stress tolerance in Arabidopsis and cotton.
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Affiliation(s)
- Lili Lu
- Engineering Research Centre of Cotton, Ministry of Education, Xinjiang Agricultural University, Urumqi, China
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, China
| | - Ghulam Qanmber
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, China
| | - Jie Li
- Engineering Research Centre of Cotton, Ministry of Education, Xinjiang Agricultural University, Urumqi, China
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, China
| | - Mengli Pu
- State Key Laboratory of Cotton Biology, Zhengzhou Research Base, Zhengzhou University, Zhengzhou, China
| | - Guoquan Chen
- State Key Laboratory of Cotton Biology, Zhengzhou Research Base, Zhengzhou University, Zhengzhou, China
| | - Shengdong Li
- State Key Laboratory of Cotton Biology, Zhengzhou Research Base, Zhengzhou University, Zhengzhou, China
| | - Le Liu
- State Key Laboratory of Cotton Biology, Zhengzhou Research Base, Zhengzhou University, Zhengzhou, China
| | - Wenqiang Qin
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, China
| | - Shuya Ma
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, China
| | - Ye Wang
- Engineering Research Centre of Cotton, Ministry of Education, Xinjiang Agricultural University, Urumqi, China
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, China
| | - Quanjia Chen
- Engineering Research Centre of Cotton, Ministry of Education, Xinjiang Agricultural University, Urumqi, China
| | - Zhao Liu
- State Key Laboratory of Cotton Biology, Zhengzhou Research Base, Zhengzhou University, Zhengzhou, China
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16
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Hu S, Bidochka MJ. Abscisic acid implicated in differential plant responses of Phaseolus vulgaris during endophytic colonization by Metarhizium and pathogenic colonization by Fusarium. Sci Rep 2021; 11:11327. [PMID: 34059713 PMCID: PMC8167117 DOI: 10.1038/s41598-021-90232-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Accepted: 05/05/2021] [Indexed: 11/16/2022] Open
Abstract
Metarhizium robertsii is an insect pathogen as well as an endophyte, and can antagonize the phytopathogen, Fusarium solani during bean colonization. However, plant immune responses to endophytic colonization by Metarhizium are largely unknown. We applied comprehensive plant hormone analysis, transcriptional expression and stomatal size analysis in order to examine plant immune responses to colonization by Metarhizium and/or Fusarium. The total amount of abscisic acid (ABA) and ABA metabolites decreased significantly in bean leaves by plant roots colonized by M. robertsii and increased significantly with F. solani compared to the un-inoculated control bean plant. Concomitantly, in comparison to the un-inoculated bean, root colonization by Metarhizium resulted in increased stomatal size in leaves and reduced stomatal size with Fusarium. Meanwhile, expression of plant immunity genes was repressed by Metarhizium and, alternately, triggered by Fusarium compared to the un-inoculated plant. Furthermore, exogenous application of ABA resulted in reduction of bean root colonization by Metarhizium but increased colonization by Fusarium compared to the control without ABA application. Our study suggested that ABA plays a central role in differential responses to endophytic colonization by Metarhizium and pathogenic colonization by Fusarium and, we also observed concomitant differences in stomatal size and expression of plant immunity genes.
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Affiliation(s)
- Shasha Hu
- Department of Biological Sciences, Brock University, St. Catharines, ON, L2S 3A1, Canada
| | - Michael J Bidochka
- Department of Biological Sciences, Brock University, St. Catharines, ON, L2S 3A1, Canada.
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17
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Ma Y, Tian H, Lin R, Wang W, Zhang N, Hussain S, Yang W, Zhang C, Zhou G, Wang T, Wang S. AITRL, an evolutionarily conserved plant specific transcription repressor regulates ABA response in Arabidopsis. Sci Rep 2021; 11:721. [PMID: 33436924 PMCID: PMC7804847 DOI: 10.1038/s41598-020-80695-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Accepted: 12/24/2020] [Indexed: 12/23/2022] Open
Abstract
Expression of stress response genes can be regulated by abscisic acid (ABA) dependent and ABA independent pathways. Osmotic stresses promote ABA accumulation, therefore inducing the expression of stress response genes via ABA signaling. Whereas cold and heat stresses induce the expression of stress response genes via ABA independent pathway. ABA induced transcription repressors (AITRs) are a family of novel transcription factors that play a role in ABA signaling, and Drought response gene (DRG) has previously been shown to play a role in regulating plant response to drought and freezing stresses. We report here the identification of DRG as a novel transcription factor and a regulator of ABA response in Arabidopsis. We found that the expression of DRG was induced by ABA treatment. Homologs searching identified AITR5 as the most closely related Arabidopsis protein to DRG, and homologs of DRG, including the AITR-like (AITRL) proteins in bryophytes and gymnosperms, are specifically presented in embryophytes. Therefore we renamed DRG as AITRL. Protoplast transfection assays show that AITRL functioned as a transcription repressor. In seed germination and seedling greening assays, the aitrl mutants showed an increased sensitivity to ABA. By using qRT-PCR, we show that ABA responses of some ABA signaling component genes including some PYR1-likes (PYLs), PROTEIN PHOSPHATASE 2Cs (PP2Cs) and SUCROSE NONFERMENTING 1 (SNF1)-RELATED PROTEIN KINASES 2s (SnRK2s) were reduced in the aitrl mutants. Taken together, our results suggest that AITRLs are a family of novel transcription repressors evolutionally conserved in embryophytes, and AITRL regulates ABA response in Arabidopsis by affecting ABA response of some ABA signaling component genes.
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Affiliation(s)
- Yanxing Ma
- Laboratory of Plant Molecular Genetics and Crop Gene Editing, School of Life Sciences, Linyi University, Linyi, China.,Key Laboratory of Molecular Epigenetics of MOE, Northeast Normal University, Changchun, China
| | - Hainan Tian
- Laboratory of Plant Molecular Genetics and Crop Gene Editing, School of Life Sciences, Linyi University, Linyi, China
| | - Rao Lin
- Key Laboratory of Molecular Epigenetics of MOE, Northeast Normal University, Changchun, China
| | - Wei Wang
- Key Laboratory of Molecular Epigenetics of MOE, Northeast Normal University, Changchun, China
| | - Na Zhang
- Key Laboratory of Molecular Epigenetics of MOE, Northeast Normal University, Changchun, China
| | - Saddam Hussain
- Key Laboratory of Molecular Epigenetics of MOE, Northeast Normal University, Changchun, China
| | - Wenting Yang
- Key Laboratory of Molecular Epigenetics of MOE, Northeast Normal University, Changchun, China
| | - Chen Zhang
- Key Laboratory of Molecular Epigenetics of MOE, Northeast Normal University, Changchun, China
| | - Ganghua Zhou
- Key Laboratory of Molecular Epigenetics of MOE, Northeast Normal University, Changchun, China
| | - Tianya Wang
- Key Laboratory of Molecular Epigenetics of MOE, Northeast Normal University, Changchun, China
| | - Shucai Wang
- Laboratory of Plant Molecular Genetics and Crop Gene Editing, School of Life Sciences, Linyi University, Linyi, China. .,Key Laboratory of Molecular Epigenetics of MOE, Northeast Normal University, Changchun, China.
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18
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Zhang Q, Zhou W, Li B, Li L, Fu M, Zhou L, Yu X, Wang D, Wang Z. Genome-Wide Analysis and the Expression Pattern of the ERF Gene Family in Hypericum perforatum. PLANTS (BASEL, SWITZERLAND) 2021; 10:plants10010133. [PMID: 33440756 PMCID: PMC7827068 DOI: 10.3390/plants10010133] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/21/2020] [Revised: 12/29/2020] [Accepted: 12/30/2020] [Indexed: 06/12/2023]
Abstract
Hypericum perforatum is a well-known medicinal herb currently used as a remedy for depression as it contains many high levels of secondary metabolites. The ethylene response factor (ERF) family encodes transcriptional regulators with multiple functions that play a vital role in the diverse developmental and physiological processes of plants, which can protect plants from various stresses by regulating the expression of genes. Although the function of several ERF genes from other plants has been further confirmed, H. perforatum is the first sequenced species in Malpighiales, and no information regarding the ERFs has been reported thus far. In this study, a total of 101 ERF genes were identified from H. perforatum. A systematic and thorough bioinformatic analysis of the ERF family was performed using the genomic database of H. perforatum. According to the phylogenetic tree analysis, HpERFs were further classified into 11 subfamilies. Gene ontology (GO) analysis suggested that most of the HpERFs likely participate in the biological processes of plants. The cis-elements were mainly divided into five categories, associated with the regulation of gene transcription, response to various stresses, and plant development. Further analysis of the expression patterns showed that the stress-responsive HpERFs responded to different treatments. This work systematically analyzed HpERFs using the genome sequences of H. perforatum. Our results provide a theoretical basis for further investigation of the function of stress-related ERFs in H. perforatum.
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19
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Lu W, Deng F, Jia J, Chen X, Li J, Wen Q, Li T, Meng Y, Shan W. The Arabidopsis thaliana gene AtERF019 negatively regulates plant resistance to Phytophthora parasitica by suppressing PAMP-triggered immunity. MOLECULAR PLANT PATHOLOGY 2020; 21:1179-1193. [PMID: 32725756 PMCID: PMC7411552 DOI: 10.1111/mpp.12971] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Revised: 06/11/2020] [Accepted: 06/12/2020] [Indexed: 05/18/2023]
Abstract
Phytophthora species are destructive plant pathogens that cause significant crop losses worldwide. To understand plant susceptibility to oomycete pathogens and to explore novel disease resistance strategies, we employed the Arabidopsis thaliana-Phytophthora parasitica model pathosystem and screened for A. thaliana T-DNA insertion mutant lines resistant to P. parasitica. This led to the identification of the resistant mutant 267-31, which carries two T-DNA insertion sites in the promoter region of the ethylene-responsive factor 19 gene (ERF019). Quantitative reverse transcription PCR (RT-qPCR) assays showed that the expression of ERF019 was induced during P. parasitica infection in the wild type, which was suppressed in the 267-31 mutant. Additional erf019 mutants were generated using CRISPR/Cas9 technology and were confirmed to have increased resistance to P. parasitica. In contrast, ERF019 overexpression lines were more susceptible. Transient overexpression assays in Nicotiana benthamiana showed that the nuclear localization of ERF019 is crucial for its susceptible function. RT-qPCR analyses showed that the expression of marker genes for multiple defence pathways was significantly up-regulated in the mutant compared with the wild type during infection. Flg22-induced hydrogen peroxide accumulation and reactive oxygen species burst were impaired in ERF019 overexpression lines, and flg22-induced MAPK activation was enhanced in erf019 mutants. Moreover, transient overexpression of ERF019 strongly suppressed INF-triggered cell death in N. benthamiana. These results reveal the importance of ERF019 in mediating plant susceptibility to P. parasitica through suppression of pathogen-associated molecular pattern-triggered immunity.
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Affiliation(s)
- Wenqin Lu
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of Plant ProtectionNorthwest A&F UniversityYanglingChina
| | - Fengyan Deng
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of Life SciencesNorthwest A&F UniversityYanglingChina
| | - Jinbu Jia
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of Plant ProtectionNorthwest A&F UniversityYanglingChina
- Institute of Plant and Food ScienceDepartment of BiologySouthern University of Science and TechnologyShenzhenChina
| | - Xiaokang Chen
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of HorticultureNorthwest A&F UniversityYanglingChina
| | - Jinfang Li
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of Plant ProtectionNorthwest A&F UniversityYanglingChina
| | - Qujiang Wen
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of Plant ProtectionNorthwest A&F UniversityYanglingChina
| | - Tingting Li
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of AgronomyNorthwest A&F UniversityYanglingChina
| | - Yuling Meng
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of AgronomyNorthwest A&F UniversityYanglingChina
| | - Weixing Shan
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of AgronomyNorthwest A&F UniversityYanglingChina
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20
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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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21
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O'Rourke JA, McCabe CE, Graham MA. Dynamic gene expression changes in response to micronutrient, macronutrient, and multiple stress exposures in soybean. Funct Integr Genomics 2020; 20:321-341. [PMID: 31655948 PMCID: PMC7152590 DOI: 10.1007/s10142-019-00709-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Revised: 07/11/2019] [Accepted: 08/08/2019] [Indexed: 12/22/2022]
Abstract
Preserving crop yield is critical for US soybean production and the global economy. Crop species have been selected for increased yield for thousands of years with individual lines selected for improved performance in unique environments, constraints not experienced by model species such as Arabidopsis. This selection likely resulted in novel stress adaptations, unique to crop species. Given that iron deficiency is a perennial problem in the soybean growing regions of the USA and phosphate deficiency looms as a limitation to global agricultural production, nutrient stress studies in crop species are critically important. In this study, we directly compared whole-genome expression responses of leaves and roots to iron (Fe) and phosphate (Pi) deficiency, representing a micronutrient and macronutrient, respectively. Conducting experiments side by side, we observed soybean responds to both nutrient deficiencies within 24 h. While soybean responds largely to -Fe deficiency, it responds strongly to Pi resupply. Though the timing of the responses was different, both nutrient stress signals used the same molecular pathways. Our study is the first to demonstrate the speed and diversity of the soybean stress response to multiple nutrient deficiencies. We also designed the study to examine gene expression changes in response to multiple stress events. We identified 865 and 3375 genes that either altered their direction of expression after a second stress exposure or were only differentially expressed after a second stress event. Understanding the molecular underpinnings of these responses in crop species could have major implications for improving stress tolerance and preserving yield.
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Affiliation(s)
- Jamie A O'Rourke
- Corn Insects and Crop Genetics Research Unit, USDA-ARS, Ames, IA, 50011, USA.
- Department of Agronomy, Iowa State University, 1567 Agronomy Hall, Ames, IA, 50011, USA.
| | - Chantal E McCabe
- Corn Insects and Crop Genetics Research Unit, USDA-ARS, Ames, IA, 50011, USA
| | - Michelle A Graham
- Corn Insects and Crop Genetics Research Unit, USDA-ARS, Ames, IA, 50011, USA
- Department of Agronomy, Iowa State University, 1567 Agronomy Hall, Ames, IA, 50011, USA
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22
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Omidbakhshfard MA, Sujeeth N, Gupta S, Omranian N, Guinan KJ, Brotman Y, Nikoloski Z, Fernie AR, Mueller-Roeber B, Gechev TS. A Biostimulant Obtained from the Seaweed Ascophyllum nodosum Protects Arabidopsis thaliana from Severe Oxidative Stress. Int J Mol Sci 2020; 21:E474. [PMID: 31940839 PMCID: PMC7013732 DOI: 10.3390/ijms21020474] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Revised: 12/26/2019] [Accepted: 01/09/2020] [Indexed: 11/16/2022] Open
Abstract
Abiotic stresses cause oxidative damage in plants. Here, we demonstrate that foliar application of an extract from the seaweed Ascophyllum nodosum, SuperFifty (SF), largely prevents paraquat (PQ)-induced oxidative stress in Arabidopsis thaliana. While PQ-stressed plants develop necrotic lesions, plants pre-treated with SF (i.e., primed plants) were unaffected by PQ. Transcriptome analysis revealed induction of reactive oxygen species (ROS) marker genes, genes involved in ROS-induced programmed cell death, and autophagy-related genes after PQ treatment. These changes did not occur in PQ-stressed plants primed with SF. In contrast, upregulation of several carbohydrate metabolism genes, growth, and hormone signaling as well as antioxidant-related genes were specific to SF-primed plants. Metabolomic analyses revealed accumulation of the stress-protective metabolite maltose and the tricarboxylic acid cycle intermediates fumarate and malate in SF-primed plants. Lipidome analysis indicated that those lipids associated with oxidative stress-induced cell death and chloroplast degradation, such as triacylglycerols (TAGs), declined upon SF priming. Our study demonstrated that SF confers tolerance to PQ-induced oxidative stress in A. thaliana, an effect achieved by modulating a range of processes at the transcriptomic, metabolic, and lipid levels.
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Affiliation(s)
- Mohammad Amin Omidbakhshfard
- Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg 1, 14476 Potsdam-Golm, Germany; (M.A.O.); (S.G.); (N.O.); (Y.B.); (A.R.F.); (B.M.-R.)
| | - Neerakkal Sujeeth
- BioAtlantis Ltd., Clash Industrial Estate, Tralee, V92 RWV5 Co. Kerry, Ireland;
| | - Saurabh Gupta
- Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg 1, 14476 Potsdam-Golm, Germany; (M.A.O.); (S.G.); (N.O.); (Y.B.); (A.R.F.); (B.M.-R.)
- Molecular Biology, Institute of Biochemistry and Biology, University of Potsdam, Karl Liebknecht Str. 24-25, 14476 Potsdam-Golm, Germany
| | - Nooshin Omranian
- Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg 1, 14476 Potsdam-Golm, Germany; (M.A.O.); (S.G.); (N.O.); (Y.B.); (A.R.F.); (B.M.-R.)
- Bioinformatics, Institute of Biochemistry and Biology, University of Potsdam, Karl Liebknecht Str. 24-25, 14476 Potsdam-Golm, Germany;
| | - Kieran J. Guinan
- BioAtlantis Ltd., Clash Industrial Estate, Tralee, V92 RWV5 Co. Kerry, Ireland;
| | - Yariv Brotman
- Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg 1, 14476 Potsdam-Golm, Germany; (M.A.O.); (S.G.); (N.O.); (Y.B.); (A.R.F.); (B.M.-R.)
| | - Zoran Nikoloski
- Bioinformatics, Institute of Biochemistry and Biology, University of Potsdam, Karl Liebknecht Str. 24-25, 14476 Potsdam-Golm, Germany;
- Department of Molecular Stress Physiology, Center of Plant Systems Biology and Biotechnology, 139 Ruski blvd., 4000 Plovdiv, Bulgaria;
| | - Alisdair R. Fernie
- Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg 1, 14476 Potsdam-Golm, Germany; (M.A.O.); (S.G.); (N.O.); (Y.B.); (A.R.F.); (B.M.-R.)
- Department of Molecular Stress Physiology, Center of Plant Systems Biology and Biotechnology, 139 Ruski blvd., 4000 Plovdiv, Bulgaria;
| | - Bernd Mueller-Roeber
- Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg 1, 14476 Potsdam-Golm, Germany; (M.A.O.); (S.G.); (N.O.); (Y.B.); (A.R.F.); (B.M.-R.)
- Molecular Biology, Institute of Biochemistry and Biology, University of Potsdam, Karl Liebknecht Str. 24-25, 14476 Potsdam-Golm, Germany
- Department of Molecular Stress Physiology, Center of Plant Systems Biology and Biotechnology, 139 Ruski blvd., 4000 Plovdiv, Bulgaria;
| | - Tsanko S. Gechev
- Department of Molecular Stress Physiology, Center of Plant Systems Biology and Biotechnology, 139 Ruski blvd., 4000 Plovdiv, Bulgaria;
- Department of Plant Physiology and Molecular Biology, University of Plovdiv, 24 Tsar Assen Str., 4000 Plovdiv, Bulgaria
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23
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Debbarma J, Sarki YN, Saikia B, Boruah HPD, Singha DL, Chikkaputtaiah C. Ethylene Response Factor (ERF) Family Proteins in Abiotic Stresses and CRISPR-Cas9 Genome Editing of ERFs for Multiple Abiotic Stress Tolerance in Crop Plants: A Review. Mol Biotechnol 2019; 61:153-172. [PMID: 30600447 DOI: 10.1007/s12033-018-0144-x] [Citation(s) in RCA: 71] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Abiotic stresses such as extreme heat, cold, drought, and salt have brought alteration in plant growth and development, threatening crop yield and quality leading to global food insecurity. Many factors plays crucial role in regulating various plant growth and developmental processes during abiotic stresses. Ethylene response factors (ERFs) are AP2/ERF superfamily proteins belonging to the largest family of transcription factors known to participate during multiple abiotic stress tolerance such as salt, drought, heat, and cold with well-conserved DNA-binding domain. Several extensive studies were conducted on many ERF family proteins in plant species through over-expression and transgenics. However, studies on ERF family proteins with negative regulatory functions are very few. In this review article, we have summarized the mechanism and role of recently studied AP2/ERF-type transcription factors in different abiotic stress responses. We have comprehensively discussed the application of advanced ground-breaking genome engineering tool, CRISPR/Cas9, to edit specific ERFs. We have also highlighted our on-going and published R&D efforts on multiplex CRISPR/Cas9 genome editing of negative regulatory genes for multiple abiotic stress responses in plant and crop models. The overall aim of this review is to highlight the importance of CRISPR/Cas9 and ERFs in developing sustainable multiple abiotic stress tolerance in crop plants.
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Affiliation(s)
- Johni Debbarma
- Biotechnology Group, Biological Sciences and Technology Division, CSIR-NEIST, Jorhat, Assam, 785006, India.,Academy of Scientific and Innovative Research (AcSIR), CSIR-NEIST, Jorhat, Assam, India
| | - Yogita N Sarki
- Biotechnology Group, Biological Sciences and Technology Division, CSIR-NEIST, Jorhat, Assam, 785006, India.,Academy of Scientific and Innovative Research (AcSIR), CSIR-NEIST, Jorhat, Assam, India
| | - Banashree Saikia
- Biotechnology Group, Biological Sciences and Technology Division, CSIR-NEIST, Jorhat, Assam, 785006, India.,Academy of Scientific and Innovative Research (AcSIR), CSIR-NEIST, Jorhat, Assam, India
| | - Hari Prasanna Deka Boruah
- Biotechnology Group, Biological Sciences and Technology Division, CSIR-NEIST, Jorhat, Assam, 785006, India.,Academy of Scientific and Innovative Research (AcSIR), CSIR-NEIST, Jorhat, Assam, India
| | - Dhanawantari L Singha
- Department of Agricultural Biotechnology, Assam Agriculture University, Jorhat, 785013, Assam, India.
| | - Channakeshavaiah Chikkaputtaiah
- Biotechnology Group, Biological Sciences and Technology Division, CSIR-NEIST, Jorhat, Assam, 785006, India. .,Academy of Scientific and Innovative Research (AcSIR), CSIR-NEIST, Jorhat, Assam, India.
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24
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Li J, Guo X, Zhang M, Wang X, Zhao Y, Yin Z, Zhang Z, Wang Y, Xiong H, Zhang H, Todorovska E, Li Z. OsERF71 confers drought tolerance via modulating ABA signaling and proline biosynthesis. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2018; 270:131-139. [PMID: 29576066 DOI: 10.1016/j.plantsci.2018.01.017] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2017] [Revised: 01/19/2018] [Accepted: 01/31/2018] [Indexed: 05/05/2023]
Abstract
Plants have evolved multiple protective strategies to adapt to adverse environmental conditions. Upland rice (UR) has evolved as a "drought-resistant type". However, little is known about genes or mechanisms in UR that underlying drought tolerance at the molecular level. Here we report isolation and functional characterization of the ERF gene, OsERF71, from the UR variety, IRAT109. The expression of OsERF71 was induced by abscisic acid (ABA) and various abiotic stresses preferentially in IRAT109 under ABA, dehydration, and polyethyleneglycol (PEG) treatments. OsERF71 was verified as a nuclear-localized protein and had transcriptional activity in yeast cells. Overexpression of the OsERF71 in Nipponbare demonstrated a significant increase in tolerance to drought stress and a reduced rate of water loss. In contrast, OsERF71 interference lines were sensitive to drought stress and exhibited a higher rate of water loss. OsERF71-overexpressing lines also showed enhanced tolerance to high salinity. Moreover, OsERF71 regulated the expression of several ABA- responsive and proline biosynthesis genes under drought stress, resulting in enhanced sensitivity to exogenous ABA treatment and proline accumulation. Accordingly, we suggest that OsERF71 plays a positive role in drought stress tolerance by increasing the expression of genes associated with ABA signaling and proline biosynthesis under stress.
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Affiliation(s)
- Jinjie Li
- Key Lab of Crop Heterosis and Utilization of Ministry of Education and Beijing Key Lab of Crop Genetic Improvement, China Agricultural University, Beijing, People's Republic of China
| | - Xiao Guo
- Key Lab of Crop Heterosis and Utilization of Ministry of Education and Beijing Key Lab of Crop Genetic Improvement, China Agricultural University, Beijing, People's Republic of China
| | - Minghui Zhang
- College of Life Science, Northeast Agricultural University, Harbin, People's Republic of China
| | - Xin Wang
- Key Lab of Crop Heterosis and Utilization of Ministry of Education and Beijing Key Lab of Crop Genetic Improvement, China Agricultural University, Beijing, People's Republic of China
| | - Yan Zhao
- Key Lab of Crop Heterosis and Utilization of Ministry of Education and Beijing Key Lab of Crop Genetic Improvement, China Agricultural University, Beijing, People's Republic of China
| | - Zhigang Yin
- Key Lab of Crop Heterosis and Utilization of Ministry of Education and Beijing Key Lab of Crop Genetic Improvement, China Agricultural University, Beijing, People's Republic of China
| | - Zhanying Zhang
- Key Lab of Crop Heterosis and Utilization of Ministry of Education and Beijing Key Lab of Crop Genetic Improvement, China Agricultural University, Beijing, People's Republic of China
| | - Yanming Wang
- Key Lab of Crop Heterosis and Utilization of Ministry of Education and Beijing Key Lab of Crop Genetic Improvement, China Agricultural University, Beijing, People's Republic of China
| | - Haiyan Xiong
- Key Lab of Crop Heterosis and Utilization of Ministry of Education and Beijing Key Lab of Crop Genetic Improvement, China Agricultural University, Beijing, People's Republic of China
| | - Hongliang Zhang
- Key Lab of Crop Heterosis and Utilization of Ministry of Education and Beijing Key Lab of Crop Genetic Improvement, China Agricultural University, Beijing, People's Republic of China
| | | | - Zichao Li
- Key Lab of Crop Heterosis and Utilization of Ministry of Education and Beijing Key Lab of Crop Genetic Improvement, China Agricultural University, Beijing, People's Republic of China.
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25
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Dubois M, Van den Broeck L, Inzé D. The Pivotal Role of Ethylene in Plant Growth. TRENDS IN PLANT SCIENCE 2018; 23:311-323. [PMID: 29428350 PMCID: PMC5890734 DOI: 10.1016/j.tplants.2018.01.003] [Citation(s) in RCA: 356] [Impact Index Per Article: 59.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Revised: 01/12/2018] [Accepted: 01/15/2018] [Indexed: 05/18/2023]
Abstract
Being continuously exposed to variable environmental conditions, plants produce phytohormones to react quickly and specifically to these changes. The phytohormone ethylene is produced in response to multiple stresses. While the role of ethylene in defense responses to pathogens is widely recognized, recent studies in arabidopsis and crop species highlight an emerging key role for ethylene in the regulation of organ growth and yield under abiotic stress. Molecular connections between ethylene and growth-regulatory pathways have been uncovered, and altering the expression of ethylene response factors (ERFs) provides a new strategy for targeted ethylene-response engineering. Crops with optimized ethylene responses show improved growth in the field, opening new windows for future crop improvement. This review focuses on how ethylene regulates shoot growth, with an emphasis on leaves.
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Affiliation(s)
- Marieke Dubois
- Ghent University, Department of Plant Biotechnology and Bioinformatics, 9052 Ghent, Belgium
- VIB Center for Plant Systems Biology, 9052 Ghent, Belgium
- Present address: Institut de Biologie Moléculaire des Plantes, Centre National de la Recherche Scientifique, 67000 Strasbourg, France
| | - Lisa Van den Broeck
- Ghent University, Department of Plant Biotechnology and Bioinformatics, 9052 Ghent, Belgium
- VIB Center for Plant Systems Biology, 9052 Ghent, Belgium
| | - Dirk Inzé
- Ghent University, Department of Plant Biotechnology and Bioinformatics, 9052 Ghent, Belgium
- VIB Center for Plant Systems Biology, 9052 Ghent, Belgium
- Correspondence: @InzeDirk
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26
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Basu S, Rabara R. Abscisic acid — An enigma in the abiotic stress tolerance of crop plants. ACTA ACUST UNITED AC 2017. [DOI: 10.1016/j.plgene.2017.04.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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27
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PLATINUM SENSITIVE 2 LIKE impacts growth, root morphology, seed set, and stress responses. PLoS One 2017; 12:e0180478. [PMID: 28678890 PMCID: PMC5498030 DOI: 10.1371/journal.pone.0180478] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2017] [Accepted: 06/15/2017] [Indexed: 01/04/2023] Open
Abstract
Eukaryotic protein phosphatase 4 (PP4) is a PP2A-type protein phosphatase that is part of a conserved complex with regulatory factors PSY2 and PP4R2. Various lines of Arabidopsis thaliana with mutated PP4 subunit genes were constructed to study the so far completely unknown functions of PP4 in plants. Mutants with knocked out putative functional homolog of the PSY2 LIKE (PSY2L) gene were dwarf and bushy, while plants with knocked out PP4R2 LIKE (PP4R2L) looked very similar to WT. The psy2l seedlings had short roots with disorganized morphology and impaired meristem. Seedling growth was sensitive to the genotoxin cisplatin. Global transcript analysis (RNA-seq) of seedlings and rosette leaves revealed several groups of genes, shared between both types of tissues, strongly influenced by knocked out PSY2L. Receptor kinases, CRINKLY3 and WAG1, important for growth and development, were down-regulated 3–7 times. EUKARYOTIC ELONGATION FACTOR5A1 was down-regulated 4–6 fold. Analysis of hormone sensitive genes indicated that abscisic acid levels were high, while auxin, cytokinin and gibberellic acid levels were low in psy2l. Expression of specific transcription factors involved in regulation of anthocyanin synthesis were strongly elevated, e.g. the master regulator PAP1, and intriguingly TT8, which is otherwise mainly expressed in seeds. The psy2l mutants accumulated anthocyanins under conditions where WT did not, pointing to PSY2L as a possible upstream negative regulator of PAP1 and TT8. Expression of the sugar-phosphate transporter GPT2, important for cellular sugar and phosphate homeostasis, was enhanced 7–8 times. Several DNA damage response genes, including the cell cycle inhibitor gene WEE1, were up-regulated in psy2l. The activation of DNA repair signaling genes, in combination with phenotypic traits showing aberrant root meristem and sensitivity to the genotoxic cisplatin, substantiate the involvement of Arabidopsis PSY2L in maintenance of genome integrity.
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Chen HC, Hsieh-Feng V, Liao PC, Cheng WH, Liu LY, Yang YW, Lai MH, Chang MC. The function of OsbHLH068 is partially redundant with its homolog, AtbHLH112, in the regulation of the salt stress response but has opposite functions to control flowering in Arabidopsis. PLANT MOLECULAR BIOLOGY 2017; 94:531-548. [PMID: 28631168 PMCID: PMC5504132 DOI: 10.1007/s11103-017-0624-6] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2016] [Accepted: 06/12/2017] [Indexed: 05/20/2023]
Abstract
KEY MESSAGE The homologous genes OsbHLH068 and AtbHLH112 have partially redundant functions in the regulation of the salt stress response but opposite functions to control flowering in Arabidopsis. The transcription factor (TF) basic/Helix-Loop-Helix (bHLH) is important for plant growth, development, and stress responses. OsbHLH068, which is a homologous gene of AtbHLH112 that is up-regulated under drought and salt stresses, as indicated by previous microarray data analysis. However, the intrinsic function of OsbHLH068 remains unknown. In the present study, we characterized the function and compared the role of OsbHLH068 with that of its homolog, AtbHLH112. Histochemical GUS staining indicated that OsbHLH068 and AtbHLH112 share a similar expression pattern in transgenic Arabidopsis during the juvenile-to-adult phase transition. Heterologous overexpression of OsbHLH068 in Arabidopsis delays seed germination, decreases salt-induced H2O2 accumulation, and promotes root elongation, whereas AtbHLH112 knock-out mutant displays an opposite phenotype. Both OsbHLH068-overexpressing transgenic Arabidopsis seedlings and the Atbhlh112 mutant display a late-flowering phenotype. Moreover, the expression of OsbHLH068-GFP driven by an AtbHLH112 promoter can compensate for the germination deficiency in the Atbhlh112 mutant, but the delayed-flowering phenotype tends to be more severe. Further analysis by microarray and qPCR indicated that the expression of FT is down-regulated in both OsbHLH068-overexpressing Arabidopsis plants and Atbhlh112 mutant plants, whereas SOC1 but not FT is highly expressed in AtbHLH112-overexpressing Arabidopsis plants. A comparative transcriptomic analysis also showed that several stress-responsive genes, such as AtERF15 and AtPUB23, were affected in both OsbHLH068- and AtbHLH112-overexpressing transgenic Arabidopsis plants. Thus, we propose that OsbHLH068 and AtbHLH112 share partially redundant functions in the regulation of abiotic stress responses but have opposite functions to control flowering in Arabidopsis, presumably due to the evolutionary functional divergence of homolog-encoded proteins.
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Affiliation(s)
- Hung-Chi Chen
- Department of Agronomy, National Taiwan University, Taipei, Taiwan, ROC
| | - Vicki Hsieh-Feng
- Department of Agronomy, National Taiwan University, Taipei, Taiwan, ROC
| | - Pei-Chun Liao
- Department of Agronomy, National Taiwan University, Taipei, Taiwan, ROC
| | - Wan-Hsing Cheng
- Institute of Plant and Microbial Biology, Academia Sinica, Taipei, Taiwan, ROC
| | - Li-Yu Liu
- Department of Agronomy, National Taiwan University, Taipei, Taiwan, ROC
| | - Yun-Wei Yang
- Department of Agronomy, National Taiwan University, Taipei, Taiwan, ROC
| | - Ming-Hsin Lai
- Crop Science Division, Taiwan Agricultural Research Institute, Taichung, Taiwan, ROC
| | - Men-Chi Chang
- Department of Agronomy, National Taiwan University, Taipei, Taiwan, ROC.
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Yu Y, Liu A, Duan X, Wang S, Sun X, Duanmu H, Zhu D, Chen C, Cao L, Xiao J, Li Q, Nisa ZU, Zhu Y, Ding X. GsERF6, an ethylene-responsive factor from Glycine soja, mediates the regulation of plant bicarbonate tolerance in Arabidopsis. PLANTA 2016; 244:681-98. [PMID: 27125386 DOI: 10.1007/s00425-016-2532-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2016] [Accepted: 04/12/2016] [Indexed: 05/07/2023]
Abstract
MAIN CONCLUSION This is an original study focus on ERF gene response to alkaline stress. GsERF6 functions as transcription factor and significantly enhanced plant tolerance to bicarbonate (HCO 3 (-) ) in transgenic Arabidopsis . Alkaline stress is one of the most harmful, but little studied environmental factors, which negatively affects plant growth, development and yield. The cause of alkaline stress is mainly due to the damaging consequence of high concentration of the bicarbonate ion, high-pH, and osmotic shock to plants. The AP2/ERF family genes encode plant-specific transcription factors involved in diverse environmental stresses. However, little is known about their physiological functions, especially in alkaline stress responses. In this study, we functionally characterized a novel ERF subfamily gene, GsERF6 from alkaline-tolerant wild soybean (Glycine soja). In wild soybean, GsERF6 was rapidly induced by NaHCO3 treatment, and its overexpression in Arabidopsis enhanced transgenic plant tolerance to NaHCO3 challenge. Interestingly, GsERF6 transgenic lines also displayed increased tolerance to KHCO3 treatment, but not to high pH stress, implicating that GsERF6 may participate specifically in bicarbonate stress responses. We also found that GsERF6 overexpression up-regulated the transcription levels of bicarbonate-stress-inducible genes such as NADP-ME, H (+)-Ppase and H (+)-ATPase, as well as downstream stress-tolerant genes such as RD29A, COR47 and KINI. GsERF6 overexpression and NaHCO3 stress also altered the expression patterns of plant hormone synthesis and hormone-responsive genes. Conjointly, our results suggested that GsERF6 is a positive regulator of plant alkaline stress by increasing bicarbonate ionic resistance specifically, providing a new insight into the regulation of gene expression under alkaline conditions.
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Affiliation(s)
- Yang Yu
- Key Laboratory of Agricultural Biological Functional Genes, Northeast Agricultural University, Harbin, 150030, China
| | - Ailin Liu
- Key Laboratory of Agricultural Biological Functional Genes, Northeast Agricultural University, Harbin, 150030, China
| | - Xiangbo Duan
- Key Laboratory of Agricultural Biological Functional Genes, Northeast Agricultural University, Harbin, 150030, China
| | - Sunting Wang
- Key Laboratory of Agricultural Biological Functional Genes, Northeast Agricultural University, Harbin, 150030, China
| | - Xiaoli Sun
- Agronomy College, Heilongjiang Bayi Agricultural University, Daqing, 163319, China
| | - Huizi Duanmu
- Key Laboratory of Agricultural Biological Functional Genes, Northeast Agricultural University, Harbin, 150030, China
| | - Dan Zhu
- College of Life Science, Qingdao Agricultural University, Qingdao, 266109, China
| | - Chao Chen
- Key Laboratory of Agricultural Biological Functional Genes, Northeast Agricultural University, Harbin, 150030, China
| | - Lei Cao
- Key Laboratory of Agricultural Biological Functional Genes, Northeast Agricultural University, Harbin, 150030, China
| | - Jialei Xiao
- Key Laboratory of Agricultural Biological Functional Genes, Northeast Agricultural University, Harbin, 150030, China
| | - Qiang Li
- Key Laboratory of Agricultural Biological Functional Genes, Northeast Agricultural University, Harbin, 150030, China
| | - Zaib Un Nisa
- Key Laboratory of Agricultural Biological Functional Genes, Northeast Agricultural University, Harbin, 150030, China
| | - Yanming Zhu
- Key Laboratory of Agricultural Biological Functional Genes, Northeast Agricultural University, Harbin, 150030, China.
| | - Xiaodong Ding
- Key Laboratory of Agricultural Biological Functional Genes, Northeast Agricultural University, Harbin, 150030, China.
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30
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Zhang H, Hong Y, Huang L, Li D, Song F. Arabidopsis AtERF014 acts as a dual regulator that differentially modulates immunity against Pseudomonas syringae pv. tomato and Botrytis cinerea. Sci Rep 2016; 6:30251. [PMID: 27445230 PMCID: PMC4957219 DOI: 10.1038/srep30251] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2016] [Accepted: 07/01/2016] [Indexed: 11/09/2022] Open
Abstract
ERF transcription factors play critical roles in plant immune responses. Here, we report the function of AtERF014, a nucleus-localized transcriptional activator, in Arabidopsis immunity. Expression of AtERF014 was induced by Pseudomonas syringae pv. tomato (Pst) and Botrytis cinerea (Bc). AtERF014-overexpressing (OE) plants displayed increased Pst resistance but decreased Bc resistance, whereas AtERF014-RNAi plants exhibited decreased Pst resistance but increased Bc resistance. After Pst infection, expression of salicylic acid (SA)-responsive genes AtPR1 and AtPR5 in AtERF014-OE plants and of a jasmonic acid/ethylene-responsive gene AtPDF1.2 in AtERF014-RNAi plants was intensified but expression of AtPDF1.2 in AtERF014-OE plants and of AtPR1 and AtPR5 in AtERF014-RNAi plants was weakened. After Bc infection, expression of AtPR1 and AtPR5 in AtERF014-OE plants was attenuated but expression of AtPR1, AtPR5 and AtPDF1.2 in AtERF014-RNAi plants was strengthened. Pathogen- and flg22-induced ROS burst, expression of PTI genes and SA-induced defense were partially suppressed in AtERF014-RNAi plants, whereas pathogen-induced ROS and flg22-induced immune response were strengthened in AtER014-OE plants. Altered expression of AtERR014 affected expression of pectin biosynthetic genes and pectin content in AtERF014-RNAi plants was decreased. These data demonstrate that AtERF014 acts as a dual regulator that differentially modulates immunity against Pst and Bc in Arabidopsis.
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Affiliation(s)
- Huijuan Zhang
- National Key Laboratory for Rice Biology, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, P.R. China
| | - Yongbo Hong
- National Key Laboratory for Rice Biology, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, P.R. China
| | - Lei Huang
- National Key Laboratory for Rice Biology, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, P.R. China
| | - Dayong Li
- National Key Laboratory for Rice Biology, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, P.R. China
| | - Fengming Song
- National Key Laboratory for Rice Biology, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, P.R. China
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Shorinola O, Bird N, Simmonds J, Berry S, Henriksson T, Jack P, Werner P, Gerjets T, Scholefield D, Balcárková B, Valárik M, Holdsworth MJ, Flintham J, Uauy C. The wheat Phs-A1 pre-harvest sprouting resistance locus delays the rate of seed dormancy loss and maps 0.3 cM distal to the PM19 genes in UK germplasm. JOURNAL OF EXPERIMENTAL BOTANY 2016; 67:4169-78. [PMID: 27217549 PMCID: PMC5301926 DOI: 10.1093/jxb/erw194] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
The precocious germination of cereal grains before harvest, also known as pre-harvest sprouting, is an important source of yield and quality loss in cereal production. Pre-harvest sprouting is a complex grain defect and is becoming an increasing challenge due to changing climate patterns. Resistance to sprouting is multi-genic, although a significant proportion of the sprouting variation in modern wheat cultivars is controlled by a few major quantitative trait loci, including Phs-A1 in chromosome arm 4AL. Despite its importance, little is known about the physiological basis and the gene(s) underlying this important locus. In this study, we characterized Phs-A1 and show that it confers resistance to sprouting damage by affecting the rate of dormancy loss during dry seed after-ripening. We show Phs-A1 to be effective even when seeds develop at low temperature (13 °C). Comparative analysis of syntenic Phs-A1 intervals in wheat and Brachypodium uncovered ten orthologous genes, including the Plasma Membrane 19 genes (PM19-A1 and PM19-A2) previously proposed as the main candidates for this locus. However, high-resolution fine-mapping in two bi-parental UK mapping populations delimited Phs-A1 to an interval 0.3 cM distal to the PM19 genes. This study suggests the possibility that more than one causal gene underlies this major pre-harvest sprouting locus. The information and resources reported in this study will help test this hypothesis across a wider set of germplasm and will be of importance for breeding more sprouting resilient wheat varieties.
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Affiliation(s)
| | - Nicholas Bird
- John Innes Centre, Norwich Research Park, NR4 7UH, UK KWS UK Ltd, Hertfordshire, SG8 7RE, UK
| | | | - Simon Berry
- Limagrain UK Ltd, Woolpit Business Park, IP30 9UP, UK
| | | | | | | | - Tanja Gerjets
- Division of Plant and Crop Sciences, School of Biosciences, University of Nottingham, LE12 5RD, UK
| | - Duncan Scholefield
- Division of Plant and Crop Sciences, School of Biosciences, University of Nottingham, LE12 5RD, UK
| | - Barbara Balcárková
- Institute of Experimental Botany, Centre of the Region Haná for Biotechnological and Agricultural Research, Šlechtitelů 31, 78371 Olomouc, Czech Republic
| | - Miroslav Valárik
- Institute of Experimental Botany, Centre of the Region Haná for Biotechnological and Agricultural Research, Šlechtitelů 31, 78371 Olomouc, Czech Republic
| | - M J Holdsworth
- Division of Plant and Crop Sciences, School of Biosciences, University of Nottingham, LE12 5RD, UK
| | - John Flintham
- John Innes Centre, Norwich Research Park, NR4 7UH, UK
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Zhang H, Huang L, Dai Y, Liu S, Hong Y, Tian L, Huang L, Cao Z, Li D, Song F. Arabidopsis AtERF15 positively regulates immunity against Pseudomonas syringae pv. tomato DC3000 and Botrytis cinerea. FRONTIERS IN PLANT SCIENCE 2015; 6:686. [PMID: 26388886 PMCID: PMC4559647 DOI: 10.3389/fpls.2015.00686] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2015] [Accepted: 08/20/2015] [Indexed: 05/18/2023]
Abstract
Upon pathogen infection, activation of immune response requires effective transcriptional reprogramming that regulates inducible expression of a large set of defense genes. A number of ethylene-responsive factor transcription factors have been shown to play critical roles in regulating immune responses in plants. In the present study, we explored the functions of Arabidopsis AtERF15 in immune responses against Pseudomonas syringae pv. tomato (Pst) DC3000, a (hemi)biotrophic bacterial pathogen, and Botrytis cinerea, a necrotrophic fungal pathogen. Expression of AtERF15 was induced by infection of Pst DC3000 and B. cinerea and by treatments with salicylic acid (SA) and methyl jasmonate. Biochemical assays demonstrated that AtERF15 is a nucleus-localized transcription activator. The AtERF15-overexpressing (AtERF15-OE) plants displayed enhanced resistance while the AtERF15-RNAi plants exhibited decreased resistance against Pst DC3000 and B. cinerea. Meanwhile, Pst DC3000- or B. cinerea-induced expression of defense genes was upregulated in AtERF15-OE plants but downregulated in AtERF15-RNAi plants, as compared to the expression in wild type plants. In response to infection with B. cinerea, the AtERF15-OE plants accumulated less reactive oxygen species (ROS) while the AtERF15-RNAi plants accumulated more ROS. The flg22- and chitin-induced oxidative burst was abolished and expression levels of the pattern-triggered immunity-responsive genes AtFRK1 and AtWRKY53 were suppressed in AtER15-RNAi plants upon treatment with flg22 or chitin. Furthermore, SA-induced defense response was also partially impaired in the AtERF15-RNAi plants. These data demonstrate that AtERF15 is a positive regulator of multiple layers of the immune responses in Arabidopsis.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | - Fengming Song
- *Correspondence: Fengming Song, National Key Laboratory for Rice Biology, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China,
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Wang X, Liu S, Tian H, Wang S, Chen JG. The Small Ethylene Response Factor ERF96 is Involved in the Regulation of the Abscisic Acid Response in Arabidopsis. FRONTIERS IN PLANT SCIENCE 2015; 6:1064. [PMID: 26635862 PMCID: PMC4659910 DOI: 10.3389/fpls.2015.01064] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2015] [Accepted: 11/16/2015] [Indexed: 05/22/2023]
Abstract
Ethylene regulates many aspects of plant growth and development including seed germination, leaf senescence, and fruit ripening, and of plant responses to environmental stimuli including both biotic and abiotic stresses. Ethylene response factors (ERFs) are plant-specific transcription factors and are a subfamily of the AP2 (APETALA2)/ERF transcription factor family. The function of many members in this large gene family remains largely unknown. ERF96, a member of the Group IX ERF family transcription factors, has recently been shown to be a transcriptional activator that is involved in plant defense response in Arabidopsis. Here we provide evidence that ERF96 is a positive regulator of abscisic acid (ABA) responses. Bioinformatics analysis indicated that there are a total four small ERFs in Arabidopsis including ERF95, ERF96, ERF97, and ERF98, and that ERF96 forms a cluster with ERF95 and ERF97. By using quantitative RT-PCR, we found that ERF96 is expressed in all tissues and organs examined except roots, with relatively high expression in flowers and seeds. Results from the protoplast transfection assay indicated that the EDLL motif-containing C-terminal domain is responsible for ERF96's transcriptional activity. Although loss-of-function mutant of ERF96 was morphologically similar to wild type plants, transgenic plants overexpressing ERF96 had smaller rosette size and were delayed in flowering time. In ABA sensitivity assays, we found that ERF96 overexpression plants were hypersensitive to ABA in terms of ABA inhibition of seed germination, early seedling development and root elongation. Consistent with these observations, elevated transcript levels of some ABA-responsive genes including RD29A, ABI5, ABF3, ABF4, P5CS, and COR15A were observed in the transgenic plants in the presence of ABA. However, in the absence of ABA treatment, the transcript levels of these ABA-responsive genes remained largely unchanged. Our experiments also showed that water loss in ERF96 overexpression plants was slower than that in Col wild type plants. Stomatal closure assays indicated that ERF96 overexpression plants had reduced stomatal aperture in the presence of ABA. Taken together, our results suggest that ERF96 positively regulates ABA responses in Arabidopsis.
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Affiliation(s)
- Xiaoping Wang
- Key Laboratory of Molecular Epigenetics of Ministry of Education and Institute of Genetics and Cytology, Northeast Normal University, Changchun, China
- Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, USA
| | - Shanda Liu
- Key Laboratory of Molecular Epigenetics of Ministry of Education and Institute of Genetics and Cytology, Northeast Normal University, Changchun, China
| | - Hainan Tian
- Key Laboratory of Molecular Epigenetics of Ministry of Education and Institute of Genetics and Cytology, Northeast Normal University, Changchun, China
| | - Shucai Wang
- Key Laboratory of Molecular Epigenetics of Ministry of Education and Institute of Genetics and Cytology, Northeast Normal University, Changchun, China
- *Correspondence: Shucai Wang,
| | - Jin-Gui Chen
- Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, USA
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Chen R, Li Q, Tan H, Chen J, Xiao Y, Ma R, Gao S, Zerbe P, Chen W, Zhang L. Gene-to-metabolite network for biosynthesis of lignans in MeJA-elicited Isatis indigotica hairy root cultures. FRONTIERS IN PLANT SCIENCE 2015; 6:952. [PMID: 26579184 PMCID: PMC4630570 DOI: 10.3389/fpls.2015.00952] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2015] [Accepted: 10/19/2015] [Indexed: 05/06/2023]
Abstract
Root and leaf tissue of Isatis indigotica shows notable anti-viral efficacy, and are widely used as "Banlangen" and "Daqingye" in traditional Chinese medicine. The plants' pharmacological activity is attributed to phenylpropanoids, especially a group of lignan metabolites. However, the biosynthesis of lignans in I. indigotica remains opaque. This study describes the discovery and analysis of biosynthetic genes and AP2/ERF-type transcription factors involved in lignan biosynthesis in I. indigotica. MeJA treatment revealed differential expression of three genes involved in phenylpropanoid backbone biosynthesis (IiPAL, IiC4H, Ii4CL), five genes involved in lignan biosynthesis (IiCAD, IiC3H, IiCCR, IiDIR, and IiPLR), and 112 putative AP2/ERF transcription factors. In addition, four intermediates of lariciresinol biosynthesis were found to be induced. Based on these results, a canonical correlation analysis using Pearson's correlation coefficient was performed to construct gene-to-metabolite networks and identify putative key genes and rate-limiting reactions in lignan biosynthesis. Over-expression of IiC3H, identified as a key pathway gene, was used for metabolic engineering of I. indigotica hairy roots, and resulted in an increase in lariciresinol production. These findings illustrate the utility of canonical correlation analysis for the discovery and metabolic engineering of key metabolic genes in plants.
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Affiliation(s)
- Ruibing Chen
- Department of Pharmaceutical Botany, School of Pharmacy, Second Military Medical UniversityShanghai, China
| | - Qing Li
- Department of Pharmacy, Shanghai Changzheng Hospital, Second Military Medical UniversityShanghai, China
| | - Hexin Tan
- Department of Pharmaceutical Botany, School of Pharmacy, Second Military Medical UniversityShanghai, China
| | - Junfeng Chen
- Department of Pharmacy, Shanghai Changzheng Hospital, Second Military Medical UniversityShanghai, China
| | - Ying Xiao
- Department of Pharmacy, Shanghai Changzheng Hospital, Second Military Medical UniversityShanghai, China
| | - Ruifang Ma
- School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical UniversityShenyang, China
| | - Shouhong Gao
- Department of Pharmacy, Shanghai Changzheng Hospital, Second Military Medical UniversityShanghai, China
| | - Philipp Zerbe
- Department of Plant Biology, University of California, DavisDavis, CA, USA
| | - Wansheng Chen
- Department of Pharmacy, Shanghai Changzheng Hospital, Second Military Medical UniversityShanghai, China
| | - Lei Zhang
- Department of Pharmaceutical Botany, School of Pharmacy, Second Military Medical UniversityShanghai, China
- *Correspondence: Lei Zhang
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