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Sun Y, Chen J, Yuan Y, Jiang N, Liu C, Zhang Y, Mao X, Zhang Q, Fang Y, Sun Z, Gai S. Auxin efflux carrier PsPIN4 identified through genome-wide analysis as vital factor of petal abscission. FRONTIERS IN PLANT SCIENCE 2024; 15:1380417. [PMID: 38799094 PMCID: PMC11116700 DOI: 10.3389/fpls.2024.1380417] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/01/2024] [Accepted: 04/24/2024] [Indexed: 05/29/2024]
Abstract
PIN-FORMED (PIN) proteins, which function as efflux transporters, play many crucial roles in the polar transportation of auxin within plants. In this study, the exogenous applications of auxin IAA and TIBA were found to significantly prolong and shorten the florescence of tree peony (Paeonia suffruticosa Andr.) flowers. This finding suggests that auxin has some regulatory influence in petal senescence and abscission. Further analysis revealed a total of 8 PsPINs distributed across three chromosomes, which could be categorized into two classes based on phylogenetic and structural analysis. PsPIN1, PsPIN2a-b, and PsPIN4 were separated into the "long" PIN category, while PsPIN5, PsPIN6a-b, and PsPIN8 belonged to the "short" one. Additionally, the cis-regulatory elements of PsPIN promoters were associated with plant development, phytohormones, and environmental stress. These genes displayed tissue-specific expression, and phosphorylation sites were abundant throughout the protein family. Notably, PsPIN4 displayed distinct and elevated expression levels in roots, leaves, and flower organs. Expression patterns among the abscission zone (AZ) and adjacent areas during various flowering stages and IAA treatment indicate that PsPIN4 likely influences the initiation of peony petal abscission. The PsPIN4 protein was observed to be co-localized on both the plasma membrane and the cell nucleus. The ectopic expression of PsPIN4 reversed the premature flower organs abscission in the Atpin4 and significantly protracted florescence when introduced to Col Arabidopsis. Our findings established a strong basis for further investigation of PIN gene biological functions, particularly concerning intrinsic relationship between PIN-mediated auxin polar.
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Affiliation(s)
- Yin Sun
- State Key Laboratory of Efficient Production of Forest Resources, Key Laboratory of Tree Breeding and Cultivation of the National Forestry and Grassland Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, China
- Shandong Provincial Key Laboratory of Forest Genetic Improvement, Yellow River delta forest ecosystem positioning research station, Shandong Provincial Academy of Forestry, Jinan, China
| | - Junqiang Chen
- Shandong Provincial Key Laboratory of Forest Genetic Improvement, Yellow River delta forest ecosystem positioning research station, Shandong Provincial Academy of Forestry, Jinan, China
| | - Yanchao Yuan
- University Key Laboratory of Plant Biotechnology in Shandong Province, College of Life Sciences, Qingdao Agricultural University, Qingdao, China
| | - Nannan Jiang
- Shandong Provincial Key Laboratory of Forest Genetic Improvement, Yellow River delta forest ecosystem positioning research station, Shandong Provincial Academy of Forestry, Jinan, China
| | - Chunying Liu
- University Key Laboratory of Plant Biotechnology in Shandong Province, College of Life Sciences, Qingdao Agricultural University, Qingdao, China
| | - Yuxi Zhang
- University Key Laboratory of Plant Biotechnology in Shandong Province, College of Life Sciences, Qingdao Agricultural University, Qingdao, China
| | - Xiuhong Mao
- Shandong Provincial Key Laboratory of Forest Genetic Improvement, Yellow River delta forest ecosystem positioning research station, Shandong Provincial Academy of Forestry, Jinan, China
| | - Qian Zhang
- Shandong Provincial Key Laboratory of Forest Genetic Improvement, Yellow River delta forest ecosystem positioning research station, Shandong Provincial Academy of Forestry, Jinan, China
| | - Yifu Fang
- Shandong Provincial Key Laboratory of Forest Genetic Improvement, Yellow River delta forest ecosystem positioning research station, Shandong Provincial Academy of Forestry, Jinan, China
| | - Zhenyuan Sun
- State Key Laboratory of Efficient Production of Forest Resources, Key Laboratory of Tree Breeding and Cultivation of the National Forestry and Grassland Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, China
| | - Shupeng Gai
- University Key Laboratory of Plant Biotechnology in Shandong Province, College of Life Sciences, Qingdao Agricultural University, Qingdao, China
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Sharma M, Tisarum R, Kohli RK, Batish DR, Cha-Um S, Singh HP. Inroads into saline-alkaline stress response in plants: unravelling morphological, physiological, biochemical, and molecular mechanisms. PLANTA 2024; 259:130. [PMID: 38647733 DOI: 10.1007/s00425-024-04368-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Accepted: 02/22/2024] [Indexed: 04/25/2024]
Abstract
MAIN CONCLUSION This article discusses the complex network of ion transporters, genes, microRNAs, and transcription factors that regulate crop tolerance to saline-alkaline stress. The framework aids scientists produce stress-tolerant crops for smart agriculture. Salinity and alkalinity are frequently coexisting abiotic limitations that have emerged as archetypal mediators of low yield in many semi-arid and arid regions throughout the world. Saline-alkaline stress, which occurs in an environment with high concentrations of salts and a high pH, negatively impacts plant metabolism to a greater extent than either stress alone. Of late, saline stress has been the focus of the majority of investigations, and saline-alkaline mixed studies are largely lacking. Therefore, a thorough understanding and integration of how plants and crops rewire metabolic pathways to repair damage caused by saline-alkaline stress is of particular interest. This review discusses the multitude of resistance mechanisms that plants develop to cope with saline-alkaline stress, including morphological and physiological adaptations as well as molecular regulation. We examine the role of various ion transporters, transcription factors (TFs), differentially expressed genes (DEGs), microRNAs (miRNAs), or quantitative trait loci (QTLs) activated under saline-alkaline stress in achieving opportunistic modes of growth, development, and survival. The review provides a background for understanding the transport of micronutrients, specifically iron (Fe), in conditions of iron deficiency produced by high pH. Additionally, it discusses the role of calcium in enhancing stress tolerance. The review highlights that to encourage biomolecular architects to reconsider molecular responses as auxiliary for developing tolerant crops and raising crop production, it is essential to (a) close the major gaps in our understanding of saline-alkaline resistance genes, (b) identify and take into account crop-specific responses, and (c) target stress-tolerant genes to specific crops.
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Affiliation(s)
- Mansi Sharma
- Department of Environment Studies, Panjab University, Chandigarh, 160 014, India
- Department of Environmental Sciences, Sharda School of Basic Sciences and Research, Sharda University, Greater Noida, 201310, Uttar Pradesh, India
| | - Rujira Tisarum
- National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), 113 Thailand Science Park, Khlong Nueng, Khlong Luang, Pathum Thani, 12120, Thailand
| | - Ravinder Kumar Kohli
- Department of Botany, Panjab University, Chandigarh, 160014, India
- Amity University, Mohali Campus, Sector 82A, Mohali, 140306, Punjab, India
| | - Daizy R Batish
- Department of Botany, Panjab University, Chandigarh, 160014, India
| | - Suriyan Cha-Um
- National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), 113 Thailand Science Park, Khlong Nueng, Khlong Luang, Pathum Thani, 12120, Thailand
| | - Harminder Pal Singh
- Department of Environment Studies, Panjab University, Chandigarh, 160 014, India.
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Xue G, Wu W, Fan Y, Ma C, Xiong R, Bai Q, Yao X, Weng W, Cheng J, Ruan J. Genome-wide identification, evolution, and role of SPL gene family in beet (Beta vulgaris L.) under cold stress. BMC Genomics 2024; 25:101. [PMID: 38262939 PMCID: PMC10804631 DOI: 10.1186/s12864-024-09995-5] [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: 11/14/2023] [Accepted: 01/09/2024] [Indexed: 01/25/2024] Open
Abstract
BACKGROUND SPL transcription factors play vital roles in regulating plant growth, development, and abiotic stress responses. Sugar beet (Beta vulgaris L.), one of the world's main sugar-producing crops, is a major source of edible and industrial sugars for humans. Although the SPL gene family has been extensively identified in other species, no reports on the SPL gene family in sugar beet are available. RESULTS Eight BvSPL genes were identified at the whole-genome level and were renamed based on their positions on the chromosome. The gene structure, SBP domain sequences, and phylogenetic relationship with Arabidopsis were analyzed for the sugar beet SPL gene family. The eight BvSPL genes were divided into six groups (II, IV, V, VI, VII, and VIII). Of the BvSPL genes, no tandem duplication events were found, but one pair of segmental duplications was present. Multiple cis-regulatory elements related to growth and development were identified in the 2000-bp region upstream of the BvSPL gene start codon (ATG). Using quantitative real-time polymerase chain reaction (qRT-PCR), the expression profiles of the eight BvSPL genes were examined under eight types of abiotic stress and during the maturation stage. BvSPL transcription factors played a vital role in abiotic stress, with BvSPL3 and BvSPL6 being particularly noteworthy. CONCLUSION Eight sugar beet SPL genes were identified at the whole-genome level. Phylogenetic trees, gene structures, gene duplication events, and expression profiles were investigated. The qRT-PCR analysis indicated that BvSPLs play a substantial role in the growth and development of sugar beet, potentially participating in the regulation of root expansion and sugar accumulation.
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Affiliation(s)
- Guoxing Xue
- College of Agriculture, Guizhou University, 550025, Guiyang, People's Republic of China
| | - Weijiao Wu
- College of Agriculture, Guizhou University, 550025, Guiyang, People's Republic of China
| | - Yue Fan
- College of Food Science and Engineering, Xinjiang Institute of Technology, 843199, Aksu, People's Republic of China
| | - Chao Ma
- College of Agriculture, Guizhou University, 550025, Guiyang, People's Republic of China
| | - Ruiqi Xiong
- College of Agriculture, Guizhou University, 550025, Guiyang, People's Republic of China
| | - Qing Bai
- College of Agriculture, Guizhou University, 550025, Guiyang, People's Republic of China
| | - Xin Yao
- College of Agriculture, Guizhou University, 550025, Guiyang, People's Republic of China
| | - Wenfeng Weng
- College of Agriculture, Guizhou University, 550025, Guiyang, People's Republic of China
| | - Jianping Cheng
- College of Agriculture, Guizhou University, 550025, Guiyang, People's Republic of China
| | - Jingjun Ruan
- College of Agriculture, Guizhou University, 550025, Guiyang, People's Republic of China.
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Yang R, Huang T, Song W, An Z, Lai Z, Liu S. Identification of WRKY gene family members in amaranth based on a transcriptome database and functional analysis of AtrWRKY42-2 in betalain metabolism. FRONTIERS IN PLANT SCIENCE 2023; 14:1300522. [PMID: 38130485 PMCID: PMC10734031 DOI: 10.3389/fpls.2023.1300522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/23/2023] [Accepted: 11/16/2023] [Indexed: 12/23/2023]
Abstract
Introduction WRKY TFs (WRKY transcription factors) contribute to the synthesis of secondary metabolites in plants. Betalains are natural pigments that do not coexist with anthocyanins within the same plant. Amaranthus tricolor ('Suxian No.1') is an important leaf vegetable rich in betalains. However, the WRKY family members in amaranth and their roles in betalain synthesis and metabolism are still unclear. Methods To elucidate the molecular characteristics of the amaranth WRKY gene family and its role in betalain synthesis, WRKY gene family members were screened and identified using amaranth transcriptome data, and their physicochemical properties, conserved domains, phylogenetic relationships, and conserved motifs were analyzed using bioinformatics methods. Results In total, 72 WRKY family members were identified from the amaranth transcriptome. Three WRKY genes involved in betalain synthesis were screened in the phylogenetic analysis of WRKY TFs. RT-qPCR showed that the expression levels of these three genes in red amaranth 'Suxian No.1' were higher than those in green amaranth 'Suxian No.2' and also showed that the expression level of AtrWRKY42 gene short-spliced transcript AtrWRKY42-2 in Amaranth 'Suxian No.1' was higher than that of the complete sequence AtrWRKY42-1, so the short-spliced transcript AtrWRKY42-2 was mainly expressed in 'Suxian No.2' amaranth. Moreover, the total expression levels of AtrWRKY42-1 and AtrWRKY42-2 were down-regulated after GA3 treatment, so AtrWRKY42-2 was identified as a candidate gene. Therefore, the short splice variant AtrWRKY42-2 cDNA sequence, gDNA sequence, and promoter sequence of AtrWRKY42 were cloned, and the PRI 101-AN-AtrWRKY42-2-EGFP vector was constructed to evaluate subcellular localization, revealing that AtrWRKY42-2 is located in the nucleus. The overexpression vector pRI 101-AN-AtrWRKY42-2-EGFP and VIGS (virus-induced gene silencing) vector pTRV2-AtrWRKY42-2 were transferred into leaves of 'Suxian No.1' by an Agrobacterium-mediated method. The results showed that AtrWRKY42-2 overexpression could promote the expression of AtrCYP76AD1 and increase betalain synthesis. A yeast one-hybrid assay demonstrated that AtrWRKY42-2 could bind to the AtrCYP76AD1 promoter to regulate betalain synthesis. Discussion This study lays a foundation for further exploring the function of AtrWRKY42-2 in betalain metabolism.
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Affiliation(s)
| | | | | | | | | | - Shengcai Liu
- Institute of Horticultural Biotechnology, Fujian Agriculture and Forestry University, Fuzhou, Fujian, China
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Misra V, Mall AK, Pandey H, Srivastava S, Sharma A. Advancements and prospects of CRISPR/Cas9 technologies for abiotic and biotic stresses in sugar beet. Front Genet 2023; 14:1235855. [PMID: 38028586 PMCID: PMC10665535 DOI: 10.3389/fgene.2023.1235855] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Accepted: 10/18/2023] [Indexed: 12/01/2023] Open
Abstract
Sugar beet is a crop with high sucrose content, known for sugar production and recently being considered as an emerging raw material for bioethanol production. This crop is also utilized as cattle feed, mainly when animal green fodder is scarce. Bioethanol and hydrogen gas production from this crop is an essential source of clean energy. Environmental stresses (abiotic/biotic) severely affect the productivity of this crop. Over the past few decades, the molecular mechanisms of biotic and abiotic stress responses in sugar beet have been investigated using next-generation sequencing, gene editing/silencing, and over-expression approaches. This information can be efficiently utilized through CRISPR/Cas 9 technology to mitigate the effects of abiotic and biotic stresses in sugar beet cultivation. This review highlights the potential use of CRISPR/Cas 9 technology for abiotic and biotic stress management in sugar beet. Beet genes known to be involved in response to alkaline, cold, and heavy metal stresses can be precisely modified via CRISPR/Cas 9 technology for enhancing sugar beet's resilience to abiotic stresses with minimal off-target effects. Similarly, CRISPR/Cas 9 technology can help generate insect-resistant sugar beet varieties by targeting susceptibility-related genes, whereas incorporating Cry1Ab and Cry1C genes may provide defense against lepidopteron insects. Overall, CRISPR/Cas 9 technology may help enhance sugar beet's adaptability to challenging environments, ensuring sustainable, high-yield production.
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Affiliation(s)
- Varucha Misra
- ICAR-Indian Institute of Sugarcane Research, Lucknow, India
| | - A. K. Mall
- ICAR-Indian Institute of Sugarcane Research, Lucknow, India
| | - Himanshu Pandey
- ICAR-Indian Institute of Sugarcane Research, Lucknow, India
- Khalsa College, Amritsar, India
| | | | - Avinash Sharma
- Faculty of Agricultural Sciences, Arunachal University of Studies, Namsai, India
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Yu J, Zhang X, Cao J, Bai H, Wang R, Wang C, Xu Z, Li C, Liu G. Genome-Wide Identification and Characterization of WRKY Transcription Factors in Betula platyphylla Suk. and Their Responses to Abiotic Stresses. Int J Mol Sci 2023; 24:15000. [PMID: 37834448 PMCID: PMC10573109 DOI: 10.3390/ijms241915000] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Revised: 10/02/2023] [Accepted: 10/07/2023] [Indexed: 10/15/2023] Open
Abstract
The WRKY transcription factor (TF) family is one the largest plant-specific transcription factor families. It has been proven to play significant roles in multiple plant biological processes, especially stress response. Although many WRKY TFs have been identified in various plant species, WRKYs in white birch (Betula platyphylla Suk.) remain to be studied. Here, we identified a total of 68 BpWRKYs, which could be classified into four main groups. The basic physiochemical properties of these TFs were analyzed using bioinformatics tools, including molecular weight, isoelectric point, chromosome location, and predicted subcellular localization. Most BpWRKYs were predicted to be located in the nucleus. Synteny analysis found 17 syntenic gene pairs among BpWRKYs and 52 syntenic gene pairs between BpWRKYs and AtWRKYs. The cis-acting elements in the promoters of BpWRKYs could be enriched in multiple plant biological processes, including stress response, hormone response, growth and development, and binding sites. Tissue-specific expression analysis using qRT-PCR showed that most BpWRKYs exhibited highest expression levels in the root. After ABA, salt (NaCl), or cold treatment, different BpWRKYs showed different expression patterns at different treatment times. Furthermore, the results of the Y2H assay proved the interaction between BpWRKY17 and a cold-responsive TF, BpCBF7. By transient expression assay, BpWRKY17 and BpWRKY67 were localized in the nucleus, consistent with the previous prediction. Our study hopes to shed light for research on WRKY TFs and plant stress response.
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Affiliation(s)
- Jiajie Yu
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin 150040, China; (J.Y.); (X.Z.); (J.C.); (H.B.); (R.W.); (C.W.); (Z.X.)
| | - Xiang Zhang
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin 150040, China; (J.Y.); (X.Z.); (J.C.); (H.B.); (R.W.); (C.W.); (Z.X.)
| | - Jiayu Cao
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin 150040, China; (J.Y.); (X.Z.); (J.C.); (H.B.); (R.W.); (C.W.); (Z.X.)
| | - Heming Bai
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin 150040, China; (J.Y.); (X.Z.); (J.C.); (H.B.); (R.W.); (C.W.); (Z.X.)
| | - Ruiqi Wang
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin 150040, China; (J.Y.); (X.Z.); (J.C.); (H.B.); (R.W.); (C.W.); (Z.X.)
| | - Chao Wang
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin 150040, China; (J.Y.); (X.Z.); (J.C.); (H.B.); (R.W.); (C.W.); (Z.X.)
| | - Zhiru Xu
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin 150040, China; (J.Y.); (X.Z.); (J.C.); (H.B.); (R.W.); (C.W.); (Z.X.)
- College of Life Science, Northeast Forestry University, Harbin 150040, China
| | - Chunming Li
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin 150040, China; (J.Y.); (X.Z.); (J.C.); (H.B.); (R.W.); (C.W.); (Z.X.)
| | - Guanjun Liu
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin 150040, China; (J.Y.); (X.Z.); (J.C.); (H.B.); (R.W.); (C.W.); (Z.X.)
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Li M, Dong X, Long G, Zhang Z, Han C, Wang Y. Genome-Wide Analysis of Q-Type C2H2 ZFP Genes in Response to Biotic and Abiotic Stresses in Sugar Beet. BIOLOGY 2023; 12:1309. [PMID: 37887019 PMCID: PMC10604892 DOI: 10.3390/biology12101309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2023] [Revised: 09/25/2023] [Accepted: 09/29/2023] [Indexed: 10/28/2023]
Abstract
A plant's Q-type C2H2-type ZFP plays key roles in plant growth and development and responses to biotic and abiotic stresses. Sugar beet (Beta vulgaris L.) is an important crop for sugar production. Salt stress and viral infection significantly reduce the root yield and sugar content of sugar beet. However, there is a lack of comprehensive genome-wide analyses of Q-type C2H2 ZFPs and their expression patterns in sugar beet under stress. In this study, 35 sugar beet Q-type C2H2 ZFPs (BvZFPs) containing at least one conserved "QALGGH" motif were identified via bioinformatics techniques using TBtools software. According to their evolutionary relationship, the BvZFPs were classified into five subclasses. Within each subclass, the physicochemical properties and motif compositions showed strong similarities. A Ka/Ks analysis indicated that the BvZFPs were conserved during evolution. Promoter cis-element analysis revealed that most BvZFPs are associated with elements related to phytohormone, biotic or abiotic stress, and plant development. The expression data showed that the BvZFPs in sugar beet are predominantly expressed in the root. In addition, BvZFPs are involved in the response to abiotic and biotic stresses, including salt stress and viral infection. Overall, these results will extend our understanding of the Q-type C2H2 gene family and provide valuable information for the biological breeding of sugar beet against abiotic and biotic stresses in the future.
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Affiliation(s)
| | | | | | | | | | - Ying Wang
- Ministry of Agriculture and Rural Affairs Key Laboratory of Pest Monitoring and Green Management, College of Plant Protection, China Agricultural University, Beijing 100193, China; (M.L.); (X.D.); (G.L.); (Z.Z.); (C.H.)
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Liu Q, Wang S, Wen J, Chen J, Sun Y, Dong S. Genome-wide identification and analysis of the WRKY gene family and low-temperature stress response in Prunus sibirica. BMC Genomics 2023; 24:358. [PMID: 37370033 DOI: 10.1186/s12864-023-09469-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2023] [Accepted: 06/20/2023] [Indexed: 06/29/2023] Open
Abstract
BACKGROUND WRKY transcription factors are a prominent gene family in plants, playing a crucial role in various biological processes including development, metabolism, defense, differentiation, and stress response. Although the WRKY gene family has been extensively studied and analysed in numerous plant species, research on Prunus sibirica's WRKY genes (PsWRKY) remains lacking. RESULTS This study analysed the basic physicochemical properties, phylogeny, gene structure, cis-acting elements, and Gene ontology (GO) annotation of PsWRKY gene family members using bioinformatics methods based on the whole-genome data of P. sibirica. In total, 55 WRKYs were identified in P. sibirica and were heterogeneously distributed on eight chromosomes. Based on the phylogenetic analysis, these WRKYs were classified into three major groups: Group I, Group II (II-a, II-b, II-c, II-d, II-e), and Group III. Members of different subfamilies have different cis-acting elements, conserved motifs, and intron-exon structures, indicating functional heterogeneity of the WRKY family. Prediction of subcellular localisation indicated that PsWRKYs were mainly located in the nucleus. Twenty pairs of duplicated genes were identified, and segmental duplication events may play an important role in PsWRKY gene family expansion. Analysis of the Ka/Ks ratio showed that the PsWRKY family's homologous genes were primarily purified by selection. Additionally, GO annotation analysis showed that the WRKY gene family was mainly involved in responses to stimuli, immune system processes, and reproductive processes. Furthermore, quantitative real-time PCR (qRT-PCR) analysis showed that 23 PsWRKYs were highly expressed in one or more tissues (pistils and roots) and PsWRKYs showed specific expression patterns under different low-temperature stress conditions. CONCLUSIONS Our results provide a scientific basis for the further exploration and functional validation of WRKYs in P. sibirica.
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Affiliation(s)
- Quangang Liu
- College of Forestry, Shenyang Agricultural University, Shenyang, China
- Key Laboratory for Silviculture of Liaoning Province, Shenyang Agricultural University, Shenyang, China
| | - Shipeng Wang
- College of Forestry, Shenyang Agricultural University, Shenyang, China
- Key Laboratory for Silviculture of Liaoning Province, Shenyang Agricultural University, Shenyang, China
| | - Jiaxing Wen
- College of Forestry, Shenyang Agricultural University, Shenyang, China
- Key Laboratory for Silviculture of Liaoning Province, Shenyang Agricultural University, Shenyang, China
| | - Jianhua Chen
- College of Forestry, Shenyang Agricultural University, Shenyang, China
- Key Laboratory for Silviculture of Liaoning Province, Shenyang Agricultural University, Shenyang, China
| | - Yongqiang Sun
- College of Forestry, Shenyang Agricultural University, Shenyang, China
- Key Laboratory for Silviculture of Liaoning Province, Shenyang Agricultural University, Shenyang, China
| | - Shengjun Dong
- College of Forestry, Shenyang Agricultural University, Shenyang, China.
- Key Laboratory for Silviculture of Liaoning Province, Shenyang Agricultural University, Shenyang, China.
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Dai WS, Peng T, Wang M, Liu JH. Genome-wide identification and comparative expression profiling of the WRKY transcription factor family in two Citrus species with different Candidatus Liberibacter asiaticus susceptibility. BMC PLANT BIOLOGY 2023; 23:159. [PMID: 36959536 PMCID: PMC10037894 DOI: 10.1186/s12870-023-04156-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/17/2022] [Accepted: 03/06/2023] [Indexed: 06/18/2023]
Abstract
BACKGROUND Salicylic Acid (SA) is a pivotal phytohormone in plant innate immunity enhancement of triggered by various pathogens, such as Candidatus Liberibacter asiaticus (CLas), the causal agent of Huanglongbing (HLB). WRKY is a plant specific transcription factor (TF) family, which plays crucial roles in plant response to biotic stresses. So far, the evolutionary history, functions, and expression patterns under SA treatment and CLas infection of WRKY family are poorly understood in Citrus, despite the release of the genome of several Citrus species. A comprehensive genomic and expressional analysis is worth to conduct for this family. RESULTS Here, a genome-wide identification of WRKY TFs was performed in two Citrus species: Citrus sinensis (HLB-sensitive) and Poncirus trifoliata (HLB-tolerant). In total, 52 CsWRKYs and 51 PtrWRKYs were identified, whose physical and chemical properties, chromosome locations, phylogenetic relationships and structural characteristics were comparatively analyzed. Especially, expression patterns of these WRKY genes before and after SA treatment and CLas infection were compared. Based on this result, seven pairs of orthologous WRKY genes showing opposite expression patterns in two Citrus species were screened out. Moreover, two pairs of orthologous WRKY genes with significant differences in the number or type of stress-responsive cis-elements in the promoter regions were discovered. Subcellular localization and transcriptional activation activity assays revealed that these two pairs of orthologous genes are classic WRKY TFs localize in the nucleus and could function as transcriptional activators. CONCLUSION In this study, we systematically analyzed the genomic characterization of WRKY family in two Citrus species, together with the analyses of expression patterns under SA signaling and CLas infection. Our study laid a foundation for further study on the function of WRKY TFs in HLB response and SA signaling of Citrus.
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Affiliation(s)
- Wen-Shan Dai
- College of Life Sciences, National Navel Orange Engineering Research Center, Gannan Normal University, Ganzhou, Jiangxi, 341000, China
| | - Ting Peng
- College of Life Sciences, National Navel Orange Engineering Research Center, Gannan Normal University, Ganzhou, Jiangxi, 341000, China
| | - Min Wang
- College of Life Sciences, National Navel Orange Engineering Research Center, Gannan Normal University, Ganzhou, Jiangxi, 341000, China.
| | - Ji-Hong Liu
- College of Horticulture and Forestry Sciences, National Key Laboratory for Germplasm Innovation & Utilization of Horticultural Crops, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
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Mu D, Chen W, Shao Y, Wilson IW, Zhao H, Luo Z, Lin X, He J, Zhang Y, Mo C, Qiu D, Tang Q. Genome-Wide Identification and Expression Analysis of WRKY Transcription Factors in Siraitia siamensis. PLANTS (BASEL, SWITZERLAND) 2023; 12:288. [PMID: 36679001 PMCID: PMC9861706 DOI: 10.3390/plants12020288] [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: 11/23/2022] [Revised: 01/03/2023] [Accepted: 01/04/2023] [Indexed: 06/17/2023]
Abstract
WRKY transcription factors, as the largest gene family in higher plants, play an important role in various biological processes including growth and development, regulation of secondary metabolites, and stress response. In this study, we performed genome-wide identification and analysis of WRKY transcription factors in S. siamensis. A total of 59 SsWRKY genes were identified that were distributed on all 14 chromosomes, and these were classified into three major groups based on phylogenetic relationships. Each of these groups had similar conserved motifs and gene structures. We compared all the S. siamensis SsWRKY genes with WRKY genes identified from three diverse plant species, and the results implied that segmental duplication and tandem duplication play an important roles in the evolution processes of the WRKY gene family. Promoter region analysis revealed that SsWRKY genes included many cis-acting elements related to plant growth and development, phytohormone response, and both abiotic and biotic stress. Expression profiles originating from the transcriptome database showed expression patterns of these SsWRKY genes in four different tissues and revealed that most genes are expressed in plant roots. Fifteen SsWRKY genes with low-temperature response motifs were surveyed for their gene expression under cold stress, showing that most genes displayed continuous up-regulation during cold treatment. Our study provides a foundation for further study on the function and regulatory mechanism of the SsWRKY gene family.
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Affiliation(s)
- Detian Mu
- College of Horticulture, Hunan Agricultural University, Changsha 410128, China
| | - Wenqiang Chen
- College of Horticulture, Hunan Agricultural University, Changsha 410128, China
| | - Yingying Shao
- College of Horticulture, Hunan Agricultural University, Changsha 410128, China
| | - Iain W. Wilson
- CSIRO Agriculture and Food, Canberra, ACT 2601, Australia
| | - Huan Zhao
- School of Traditional Chinese Medicine, Capital Medical University, Beijing 100069, China
| | - Zuliang Luo
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing 100193, China
| | - Xiaodong Lin
- College of Horticulture, Hunan Agricultural University, Changsha 410128, China
| | - Jialong He
- College of Horticulture, Hunan Agricultural University, Changsha 410128, China
| | - Yuan Zhang
- College of Horticulture, Hunan Agricultural University, Changsha 410128, China
| | - Changming Mo
- Guangxi Crop Genetic Improvement and Biotechnology Laboaratory, Guangxi Academy of Agricultural Sciences, Nanning 530007, China
| | - Deyou Qiu
- State Key Laboratory of Tree Genetics and Breeding, Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, China
| | - Qi Tang
- College of Horticulture, Hunan Agricultural University, Changsha 410128, China
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11
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Wu J, Liang X, Lin M, Lan Y, Xiang Y, Yan H. Comprehensive analysis of MAPK gene family in Populus trichocarpa and physiological characterization of PtMAPK3-1 in response to MeJA induction. PHYSIOLOGIA PLANTARUM 2023; 175:e13869. [PMID: 36723249 DOI: 10.1111/ppl.13869] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Revised: 01/23/2023] [Accepted: 01/30/2023] [Indexed: 06/18/2023]
Abstract
Mitogen-activated protein kinases (MAPKs) play important roles in plant growth and development, as well as hormone and stress responses by signaling to eukaryotic cells, through MAPK cascade, the presence of various cues; thereby, regulating various responses. The MAPK cascade consists mainly of three gene families, MAPK, MAPKK, and MAPKKK, which activate downstream signaling pathways through sequential phosphorylation. Although the MAPK cascade gene family has been reported in several species, there is a lack of comprehensive analysis in poplar. We identified 21 MAPK genes, 11 MAPKK genes, and 104 MAPKKK genes in Populus trichocarpa. The phylogenetic classification was supported by conservative motif, gene structure and motif analysis. Whole genome duplication has an important role in the expansion of MAPK cascade genes. Analysis of promoter cis-elements and expression profiles indicates that MAPK cascade genes have important roles in plant growth and development, abiotic and biotic stresses, and phytohormone response. Expression profiling revealed a significant upregulation of PtMAPK3-1 expression in response to drought, salt and disease stresses. Poplar transiently overexpressing PtMAPK3-1 and treated with methyl jasmonic acid (MeJA) had higher catalase and peroxidase levels than non-overexpressing poplar. This work represents the first complete inventory of the MAPK cascade in P. trichocarpa, which reveals that PtMAPK3-1 is induced by the MeJA hormone and participates in the MeJA-induced enhancement of the antioxidant enzyme system.
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Affiliation(s)
- Jing Wu
- Laboratory of Modern Biotechnology, School of Forestry and Landscape Architecture, Anhui Agricultural University, Hefei, China
| | - Xiaoyu Liang
- Laboratory of Modern Biotechnology, School of Forestry and Landscape Architecture, Anhui Agricultural University, Hefei, China
| | - Miao Lin
- Laboratory of Modern Biotechnology, School of Forestry and Landscape Architecture, Anhui Agricultural University, Hefei, China
| | - Yangang Lan
- Laboratory of Modern Biotechnology, School of Forestry and Landscape Architecture, Anhui Agricultural University, Hefei, China
| | - Yan Xiang
- Laboratory of Modern Biotechnology, School of Forestry and Landscape Architecture, Anhui Agricultural University, Hefei, China
- National Engineering Laboratory of Crop Stress Resistance Breeding, Anhui Agricultural University, Hefei, China
| | - Hanwei Yan
- Laboratory of Modern Biotechnology, School of Forestry and Landscape Architecture, Anhui Agricultural University, Hefei, China
- National Engineering Laboratory of Crop Stress Resistance Breeding, Anhui Agricultural University, Hefei, China
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12
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Ruan Q, Wang Y, Xu H, Wang B, Zhu X, Wei B, Wei X. Genome-wide identification, phylogenetic, and expression analysis under abiotic stress conditions of Whirly (WHY) gene family in Medicago sativa L. Sci Rep 2022; 12:18676. [PMID: 36333411 PMCID: PMC9636397 DOI: 10.1038/s41598-022-22658-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Accepted: 10/18/2022] [Indexed: 11/06/2022] Open
Abstract
The WHY family is a group of plant-specific transcription factors, that can bind to single-stranded DNA molecules and play a variety of functions in plant nuclei and organelles, participating in the regulation of plant leaf senescence. It has been identified and analyzed in many species, however, the systematic identification and analysis of the WHY genes family have not yet been reported in alfalfa (Medicago sativa L.). Therefore, to explore the function of alfalfa the WHY genes, and 10 MsWHY genes were identified and further characterized their evolutionary relationship and expression patterns by analyzing the recently published genome of alfalfa. Comprehensive analysis of the chromosome location, physicochemical properties of the protein, evolutionary relationship, conserved motifs, and responses to abiotic stresses of the WHY gene family in alfalfa using bioinformatics methods. The results showed that 10 MsWHY genes were distributed on 10 chromosomes, and collinearity analysis showed that many MsWHYs might be derived from segmental duplications, and these genes are under purifying selection. Based on phylogenetic analyses, the WHY gene family of alfalfa can be divided into four subfamilies: I-IV subfamily, and approximately all the WHY genes within the same subfamily share similar gene structures. The 10 MsWHY gene family members contained 10 motifs, of which motif 2 and motif 4 are the conserved motifs shared by these genes. Furthermore, the analysis of cis-regulatory elements indicated that regulatory elements related to transcription, cell cycle, development, hormone, and stress response are abundant in the promoter sequence of the MsWHY genes. Real-time quantitative PCR demonstrated that MsWHYs gene expression is induced by drought, salt, and methyl jasmonate. The present study serves as a basic foundation for future functional studies on the alfalfa WHY family.
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Affiliation(s)
- Qian Ruan
- College of Life Science and Technology, Gansu Agricultural University, Lanzhou, 730070, China
- Gansu Key Laboratory of Crop Genetic Improvement and Germplasm Innovation, Lanzhou, 730070, China
- Gansu Key Laboratory of Arid Habitat Crop Science, Lanzhou, 730070, China
| | - Yizhen Wang
- College of Life Science and Technology, Gansu Agricultural University, Lanzhou, 730070, China
- Gansu Key Laboratory of Crop Genetic Improvement and Germplasm Innovation, Lanzhou, 730070, China
- Gansu Key Laboratory of Arid Habitat Crop Science, Lanzhou, 730070, China
| | - Haoyu Xu
- College of Life Science and Technology, Gansu Agricultural University, Lanzhou, 730070, China
- Gansu Key Laboratory of Crop Genetic Improvement and Germplasm Innovation, Lanzhou, 730070, China
- Gansu Key Laboratory of Arid Habitat Crop Science, Lanzhou, 730070, China
| | - Baoqiang Wang
- College of Life Science and Technology, Gansu Agricultural University, Lanzhou, 730070, China
- Gansu Key Laboratory of Crop Genetic Improvement and Germplasm Innovation, Lanzhou, 730070, China
- Gansu Key Laboratory of Arid Habitat Crop Science, Lanzhou, 730070, China
| | - Xiaolin Zhu
- College of Life Science and Technology, Gansu Agricultural University, Lanzhou, 730070, China
- Gansu Key Laboratory of Crop Genetic Improvement and Germplasm Innovation, Lanzhou, 730070, China
- Gansu Key Laboratory of Arid Habitat Crop Science, Lanzhou, 730070, China
| | - Bochuang Wei
- College of Life Science and Technology, Gansu Agricultural University, Lanzhou, 730070, China
- Gansu Key Laboratory of Crop Genetic Improvement and Germplasm Innovation, Lanzhou, 730070, China
- Gansu Key Laboratory of Arid Habitat Crop Science, Lanzhou, 730070, China
| | - Xiaohong Wei
- College of Life Science and Technology, Gansu Agricultural University, Lanzhou, 730070, China.
- Gansu Key Laboratory of Crop Genetic Improvement and Germplasm Innovation, Lanzhou, 730070, China.
- Gansu Key Laboratory of Arid Habitat Crop Science, Lanzhou, 730070, China.
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13
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Li X, He W, Fang J, Liang Y, Zhang H, Chen D, Wu X, Zhang Z, Wang L, Han P, Zhang B, Xue T, Zheng W, He J, Bai C. Genomic and transcriptomic-based analysis of agronomic traits in sugar beet ( Beta vulgaris L.) pure line IMA1. FRONTIERS IN PLANT SCIENCE 2022; 13:1028885. [PMID: 36311117 PMCID: PMC9608375 DOI: 10.3389/fpls.2022.1028885] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Accepted: 09/20/2022] [Indexed: 06/16/2023]
Abstract
Sugar beet (Beta vulgaris L.) is an important sugar-producing and energy crop worldwide. The sugar beet pure line IMA1 independently bred by Chinese scientists is a standard diploid parent material that is widely used in hybrid-breeding programs. In this study, a high-quality, chromosome-level genome assembly for IMA1was conducted, and 99.1% of genome sequences were assigned to nine chromosomes. A total of 35,003 protein-coding genes were annotated, with 91.56% functionally annotated by public databases. Compared with previously released sugar beet assemblies, the new genome was larger with at least 1.6 times larger N50 size, thereby substantially improving the completeness and continuity of the sugar beet genome. A Genome-Wide Association Studies analysis identified 10 disease-resistance genes associated with three important beet diseases and five genes associated with sugar yield per hectare, which could be key targets to improve sugar productivity. Nine highly expressed genes associated with pollen fertility of sugar beet were also identified. The results of this study provide valuable information to identify and dissect functional genes affecting sugar beet agronomic traits, which can increase sugar beet production and help screen for excellent sugar beet breeding materials. In addition, information is provided that can precisely incorporate biotechnology tools into breeding efforts.
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Affiliation(s)
- Xiaodong Li
- Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences, Hohhot, China
| | - Wenjin He
- Life Science College of Fujian Normal University, Fuzhou, China
| | - Jingping Fang
- Life Science College of Fujian Normal University, Fuzhou, China
| | - Yahui Liang
- Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences, Hohhot, China
- Inner Mongolia Key Laboratory of Sugarbeet Genetics & Germplasm Enhancement, Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences, Hohhot, China
| | - Huizhong Zhang
- Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences, Hohhot, China
- Inner Mongolia Key Laboratory of Sugarbeet Genetics & Germplasm Enhancement, Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences, Hohhot, China
| | - Duo Chen
- Life Science College of Fujian Normal University, Fuzhou, China
| | - Xingrong Wu
- Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences, Hohhot, China
- Inner Mongolia Key Laboratory of Sugarbeet Genetics & Germplasm Enhancement, Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences, Hohhot, China
| | - Ziqiang Zhang
- Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences, Hohhot, China
- Inner Mongolia Key Laboratory of Sugarbeet Genetics & Germplasm Enhancement, Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences, Hohhot, China
| | - Liang Wang
- Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences, Hohhot, China
- Inner Mongolia Key Laboratory of Sugarbeet Genetics & Germplasm Enhancement, Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences, Hohhot, China
| | - Pingan Han
- Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences, Hohhot, China
- Inner Mongolia Key Laboratory of Sugarbeet Genetics & Germplasm Enhancement, Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences, Hohhot, China
| | - Bizhou Zhang
- Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences, Hohhot, China
- Inner Mongolia Key Laboratory of Sugarbeet Genetics & Germplasm Enhancement, Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences, Hohhot, China
| | - Ting Xue
- Life Science College of Fujian Normal University, Fuzhou, China
| | - Wenzhe Zheng
- Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences, Hohhot, China
- Inner Mongolia Key Laboratory of Sugarbeet Genetics & Germplasm Enhancement, Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences, Hohhot, China
| | - Jiangfeng He
- Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences, Hohhot, China
- Inner Mongolia Key Laboratory of Sugarbeet Genetics & Germplasm Enhancement, Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences, Hohhot, China
| | - Chen Bai
- Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences, Hohhot, China
- Inner Mongolia Key Laboratory of Sugarbeet Genetics & Germplasm Enhancement, Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences, Hohhot, China
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14
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Chen C, Xie F, Shah K, Hua Q, Chen J, Zhang Z, Zhao J, Hu G, Qin Y. Genome-Wide Identification of WRKY Gene Family in Pitaya Reveals the Involvement of HmoWRKY42 in Betalain Biosynthesis. Int J Mol Sci 2022; 23:ijms231810568. [PMID: 36142481 PMCID: PMC9502481 DOI: 10.3390/ijms231810568] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Revised: 09/07/2022] [Accepted: 09/07/2022] [Indexed: 12/16/2022] Open
Abstract
The WRKY gene family is a plant-specific transcription factor (TF) that regulates many physiological processes and (a) biotic stress responses. Despite this, little is known about the molecular properties and roles of WRKY TFs in pitaya betalain biosynthesis. Here we report the identification of 70 WRKY in Hylocereus undatus, their gene structure, locations on each chromosome, systematic phylogenetic analysis, conserved motif analysis, and synteny of HuWRKY genes. HmoWRKY42 is a Group IIb WRKY protein and contains a coiled-coil motif, a WRKY domain and a C2H2 zinc-finger motif (CX5CX23HXH). Results from yeast one-hybrid and transient dual-luciferase assays showed that HmoWRKY42 was a transcriptional repressor and could repress HmocDOPA5GT1 expression by binding to its promoter. Yeast two-hybrid assays showed that HmoWRKY42 could interact with itself to form homodimers. Knocking out the coiled-coil motif of HmoWRKY42 prevented its self-interaction and prevented it from binding to the HmocDOPA5GT1 promoter. Knocking out the WRKY domain and C2H2 zinc-finger motif sequence of HmoWRKY42 also prevented it from binding to the HmocDOPA5GT1 promoter. The coiled-coil motif, the WRKY domain and the C2H2 zinc finger motif are key motifs for the binding of HmoWRKY42 to the HmocDOPA5GT1 promoter. HmoWRKY42 is localized in the nucleus and possesses trans-activation ability responsible for pitaya betalain biosynthesis by repressing the transcription of HmocDOPA5GT1. As far as we know, no reports are available on the role of HmoWRKY42 in pitaya betalain biosynthesis. The results provide an important foundation for future analyses of the regulation and functions of the HuWRKY gene family.
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15
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Wang N, Lin Y, Qi F, Xiaoyang C, Peng Z, Yu Y, Liu Y, Zhang J, Qi X, Deyholos M, Zhang J. Comprehensive Analysis of Differentially Expressed Genes and Epigenetic Modification-Related Expression Variation Induced by Saline Stress at Seedling Stage in Fiber and Oil Flax, Linum usitatissimum L. PLANTS (BASEL, SWITZERLAND) 2022; 11:2053. [PMID: 35956530 PMCID: PMC9370232 DOI: 10.3390/plants11152053] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/03/2022] [Revised: 07/23/2022] [Accepted: 08/03/2022] [Indexed: 06/15/2023]
Abstract
The ability of different germplasm to adapt to a saline-alkali environment is critical to learning about the tolerance mechanism of saline-alkali stress in plants. Flax is an important oil and fiber crop in many countries. However, its molecular tolerance mechanism under saline stress is still not clear. In this study, we studied morphological, physiological characteristics, and gene expression variation in the root and leaf in oil and fiber flax types under saline stress, respectively. Abundant differentially expressed genes (DEGs) induced by saline stress, tissue/organ specificity, and different genotypes involved in plant hormones synthesis and metabolism and transcription factors and epigenetic modifications were detected. The present report provides useful information about the mechanism of flax response to saline stress and could lead to the future elucidation of the specific functions of these genes and help to breed suitable flax varieties for saline/alkaline soil conditions.
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Affiliation(s)
- Ningning Wang
- Faculty of Agronomy, Jilin Agricultural University, Changchun 131018, China
| | - Yujie Lin
- Faculty of Agronomy, Jilin Agricultural University, Changchun 131018, China
| | - Fan Qi
- Faculty of Agronomy, Jilin Agricultural University, Changchun 131018, China
| | - Chunxiao Xiaoyang
- Faculty of Agronomy, Jilin Agricultural University, Changchun 131018, China
| | - Zhanwu Peng
- Information Center, Jilin Agricultural University, Changchun 130000, China
| | - Ying Yu
- School of Basic Medicine, Guizhou University of Traditional Chinese Medicine, Guiyang 550025, China
| | - Yingnan Liu
- Institute of Natural Resource and Ecology, Heilongjiang Academy of Science, Harbin 150040, China
| | - Jun Zhang
- Faculty of Agronomy, Jilin Agricultural University, Changchun 131018, China
| | - Xin Qi
- Faculty of Agronomy, Jilin Agricultural University, Changchun 131018, China
| | - Michael Deyholos
- Department of Biology, University of British Columbia Okanagan, Kelowna, BC V1V 1V7, Canada
| | - Jian Zhang
- Faculty of Agronomy, Jilin Agricultural University, Changchun 131018, China
- Department of Biology, University of British Columbia Okanagan, Kelowna, BC V1V 1V7, Canada
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16
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Yang J, Zhang B, Gu G, Yuan J, Shen S, Jin L, Lin Z, Lin J, Xie X. Genome-wide identification and expression analysis of the R2R3-MYB gene family in tobacco (Nicotiana tabacum L.). BMC Genomics 2022; 23:432. [PMID: 35681121 PMCID: PMC9178890 DOI: 10.1186/s12864-022-08658-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Accepted: 05/26/2022] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND The R2R3-MYB transcription factor is one of the largest gene families in plants and involved in the regulation of plant development, hormone signal transduction, biotic and abiotic stresses. Tobacco is one of the most important model plants. Therefore, it will be of great significance to investigate the R2R3-MYB gene family and their expression patterns under abiotic stress and senescence in tobacco. RESULTS A total of 174 R2R3-MYB genes were identified from tobacco (Nicotiana tabacum L.) genome and were divided into 24 subgroups based on phylogenetic analysis. Gene structure (exon/intron) and protein motifs were especially conserved among the NtR2R3-MYB genes, especially members within the same subgroup. The NtR2R3-MYB genes were distributed on 24 tobacco chromosomes. Analysis of gene duplication events obtained 3 pairs of tandem duplication genes and 62 pairs of segmental duplication genes, suggesting that segmental duplications is the major pattern for R2R3-MYB gene family expansion in tobacco. Cis-regulatory elements of the NtR2R3-MYB promoters were involved in cellular development, phytohormones, environmental stress and photoresponsive. Expression profile analysis showed that NtR2R3-MYB genes were widely expressed in different maturity tobacco leaves, and however, the expression patterns of different members appeared to be diverse. The qRT-PCR analysis of 15 NtR2R3-MYBs confirmed their differential expression under different abiotic stresses (cold, salt and drought), and notably, NtMYB46 was significantly up-regulated under three treatments. CONCLUSIONS In summary, a genome-wide identification, evolutionary and expression analysis of R2R3-MYB gene family in tobacco were conducted. Our results provided a solid foundation for further biological functional study of NtR2R3-MYB genes in tobacco.
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Affiliation(s)
- Jiahan Yang
- College of Life Sciences, Fujian Agriculture & Forestry University, Fuzhou, China
| | - Binghui Zhang
- Institute of Tobacco Science, Fujian Provincial Tobacco Company, Fuzhou, China
| | - Gang Gu
- Institute of Tobacco Science, Fujian Provincial Tobacco Company, Fuzhou, China
| | - Jiazheng Yuan
- Department of Biological and Forensic Sciences, Fayetteville State University, Fayetteville, NC, 28301, USA
| | - Shaojun Shen
- Longyan Company of Fujian Tobacco Corporation, Longyan, 364000, China
| | - Liao Jin
- Yanping Branch of Nanping Tobacco Company, Nanping, China
| | - Zhiqiang Lin
- Yanping Branch of Nanping Tobacco Company, Nanping, China
| | - Jianfeng Lin
- Yanping Branch of Nanping Tobacco Company, Nanping, China
| | - Xiaofang Xie
- College of Life Sciences, Fujian Agriculture & Forestry University, Fuzhou, China.
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17
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Yolcu S, Alavilli H, Ganesh P, Asif M, Kumar M, Song K. An Insight into the Abiotic Stress Responses of Cultivated Beets ( Beta vulgaris L.). PLANTS (BASEL, SWITZERLAND) 2021; 11:plants11010012. [PMID: 35009016 PMCID: PMC8747243 DOI: 10.3390/plants11010012] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2021] [Revised: 12/12/2021] [Accepted: 12/14/2021] [Indexed: 05/03/2023]
Abstract
Cultivated beets (sugar beets, fodder beets, leaf beets, and garden beets) belonging to the species Beta vulgaris L. are important sources for many products such as sugar, bioethanol, animal feed, human nutrition, pulp residue, pectin extract, and molasses. Beta maritima L. (sea beet or wild beet) is a halophytic wild ancestor of all cultivated beets. With a requirement of less water and having shorter growth period than sugarcane, cultivated beets are preferentially spreading from temperate regions to subtropical countries. The beet cultivars display tolerance to several abiotic stresses such as salt, drought, cold, heat, and heavy metals. However, many environmental factors adversely influence growth, yield, and quality of beets. Hence, selection of stress-tolerant beet varieties and knowledge on the response mechanisms of beet cultivars to different abiotic stress factors are most required. The present review discusses morpho-physiological, biochemical, and molecular responses of cultivated beets (B. vulgaris L.) to different abiotic stresses including alkaline, cold, heat, heavy metals, and UV radiation. Additionally, we describe the beet genes reported for their involvement in response to these stress conditions.
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Affiliation(s)
- Seher Yolcu
- Faculty of Engineering and Natural Sciences, Sabanci University, Istanbul 34956, Turkey;
- Correspondence: (S.Y.); (H.A.); (K.S.)
| | - Hemasundar Alavilli
- Department of Bioresources Engineering, Sejong University, Seoul 05006, Korea
- Correspondence: (S.Y.); (H.A.); (K.S.)
| | - Pushpalatha Ganesh
- Department of Plant Biotechnology, M. S. Swaminathan School of Agriculture, Centurion University of Technology and Management, Odisha 761211, India;
| | - Muhammad Asif
- Faculty of Engineering and Natural Sciences, Sabanci University, Istanbul 34956, Turkey;
| | - Manu Kumar
- Department of Life Science, College of Life Science and Biotechnology, Dongguk University, Seoul 10326, Korea;
| | - Kihwan Song
- Department of Bioresources Engineering, Sejong University, Seoul 05006, Korea
- Correspondence: (S.Y.); (H.A.); (K.S.)
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18
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Ren J, Hu J, Zhang A, Ren S, Jing T, Wang X, Sun M, Huang L, Zeng B. The whole-genome and expression profile analysis of WRKY and RGAs in Dactylis glomerata showed that DG6C02319.1 and Dg WRKYs may cooperate in the immunity against rust. PeerJ 2021; 9:e11919. [PMID: 34466285 PMCID: PMC8380429 DOI: 10.7717/peerj.11919] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Accepted: 07/16/2021] [Indexed: 02/01/2023] Open
Abstract
Orchardgrass (Dactylis glomerata) is one of the top four perennial forages worldwide and, despite its large economic advantages, often threatened by various environmental stresses. WRKY transcription factors (TFs) can regulate a variety of plant processes, widely participate in plant responses to biotic and abiotic stresses, and are one of the largest gene families in plants. WRKYs can usually bind W-box elements specifically. In this study, we identified a total of 93 DgWRKY genes and 281 RGAs, including 65, 169 and 47 nucleotide-binding site-leucine-rich repeats (NBS-LRRs), leucine-rich repeats receptor-like protein kinases (LRR-RLKs), and leucine-rich repeats receptor-like proteins (LRR-RLPs), respectively. Through analyzing the expression of DgWRKY genes in orchardgrass under different environmental stresses, it was found that many DgWRKY genes were differentially expressed under heat, drought, submergence, and rust stress. In particular, it was found that the greatest number of genes were differentially expressed under rust infection. Consistently, GO and KEGG enrichment analysis of all genes showed that 78 DgWRKY TFs were identified in the plant–pathogen interaction pathway, with 59 of them differentially expressed. Through cis-acting element prediction, 154 RGAs were found to contain W-box elements. Among them, DG6C02319.1 (a member of the LRR-RLK family) was identified as likely to interact with 14 DGWRKYs. Moreover, their expression levels in susceptible plants after rust inoculation were first up-regulated and then down-regulated, while those in the resistant plants were always up-regulated. In general, DgWRKYs responded to both biotic stress and abiotic stress. DgWRKYs and RGAs may synergistically respond to the response of orchardgrass to rust. This study provides meaningful insight into the molecular mechanisms of WRKY proteins in orchardgrass.
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Affiliation(s)
- Juncai Ren
- College of Animal Science and Technology, Southwest University, Chongqing, Chongqing, China
| | - Jialing Hu
- College of Grassland Science and Technology, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Ailing Zhang
- College of Grassland Science and Technology, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Shuping Ren
- College of Animal Science and Technology, Southwest University, Chongqing, Chongqing, China
| | - Tingting Jing
- College of Grassland Science and Technology, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Xiaoshan Wang
- College of Grassland Science and Technology, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Min Sun
- College of Grassland Science and Technology, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Linkai Huang
- College of Grassland Science and Technology, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Bing Zeng
- College of Animal Science and Technology, Southwest University, Chongqing, Chongqing, China
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19
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Fang S, Hou X, Liang X. Response Mechanisms of Plants Under Saline-Alkali Stress. FRONTIERS IN PLANT SCIENCE 2021; 12:667458. [PMID: 34149764 PMCID: PMC8213028 DOI: 10.3389/fpls.2021.667458] [Citation(s) in RCA: 111] [Impact Index Per Article: 37.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2021] [Accepted: 05/10/2021] [Indexed: 05/20/2023]
Abstract
As two coexisting abiotic stresses, salt stress and alkali stress have severely restricted the development of global agriculture. Clarifying the plant resistance mechanism and determining how to improve plant tolerance to salt stress and alkali stress have been popular research topics. At present, most related studies have focused mainly on salt stress, and salt-alkali mixed stress studies are relatively scarce. However, in nature, high concentrations of salt and high pH often occur simultaneously, and their synergistic effects can be more harmful to plant growth and development than the effects of either stress alone. Therefore, it is of great practical importance for the sustainable development of agriculture to study plant resistance mechanisms under saline-alkali mixed stress, screen new saline-alkali stress tolerance genes, and explore new plant salt-alkali tolerance strategies. Herein, we summarized how plants actively respond to saline-alkali stress through morphological adaptation, physiological adaptation and molecular regulation.
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Affiliation(s)
- Shumei Fang
- Department of Biotechnology, College of Life Science and Biotechnology, Heilongjiang Bayi Agricultural University, Daqing, China
- *Correspondence: Shumei Fang,
| | - Xue Hou
- Department of Biotechnology, College of Life Science and Biotechnology, Heilongjiang Bayi Agricultural University, Daqing, China
| | - Xilong Liang
- Department of Environmental Science, College of Agriculture, Heilongjiang Bayi Agricultural University, Daqing, China
- Heilongjiang Plant Growth Regulator Engineering Technology Research Center, Daqing, China
- Xilong Liang,
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20
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Mao P, Jin X, Bao Q, Mei C, Zhou Q, Min X, Liu Z. WRKY Transcription Factors in Medicago sativa L.: Genome-Wide Identification and Expression Analysis Under Abiotic Stress. DNA Cell Biol 2020; 39:2212-2225. [PMID: 33156699 DOI: 10.1089/dna.2020.5726] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Alfalfa (Medicago sativa L.) is the most widely cultivated leguminous herb in the world. Its agricultural development has been restricted by various adverse environmental conditions, including water deficiency, high salinity, and low temperature. WRKY transcription factors (TFs) serve important roles in the regulation of plant development and stress responses. Research on the WRKY gene family has been reported for several species, but minimal information is available for alfalfa. In the present study, a total of 107 WRKY genes were identified in alfalfa and divided into 3 main groups. The classification, evolution, conserved motifs, and tissue expression were comprehensively analyzed. Meanwhile, 27 MsWRKY candidate genes that may be involved in abiotic stress were isolated through an analysis of gene expression profiles under different stresses, including cold, abscisic acid, drought, and salt treatments. Additionally, investigation of the cis-elements and potential biological functions of these genes further revealed that MsWRKY TFs may serve important roles in multiple stress resistance in alfalfa. This study provides an important foundation for future cloning and functional studies of WRKY genes in alfalfa.
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Affiliation(s)
- Pei Mao
- State Key Laboratory of Grassland Agro-ecosystems, Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, Engineering Research Center of Grassland Industry, Ministry of Education, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, China
| | - Xiaoyu Jin
- State Key Laboratory of Grassland Agro-ecosystems, Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, Engineering Research Center of Grassland Industry, Ministry of Education, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, China
| | - Qinyan Bao
- State Key Laboratory of Grassland Agro-ecosystems, Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, Engineering Research Center of Grassland Industry, Ministry of Education, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, China
| | - Cuo Mei
- State Key Laboratory of Grassland Agro-ecosystems, Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, Engineering Research Center of Grassland Industry, Ministry of Education, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, China
| | - Qiang Zhou
- State Key Laboratory of Grassland Agro-ecosystems, Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, Engineering Research Center of Grassland Industry, Ministry of Education, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, China
| | - Xueyang Min
- State Key Laboratory of Grassland Agro-ecosystems, Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, Engineering Research Center of Grassland Industry, Ministry of Education, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, China
| | - Zhipeng Liu
- State Key Laboratory of Grassland Agro-ecosystems, Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, Engineering Research Center of Grassland Industry, Ministry of Education, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, China
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21
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Baillo EH, Hanif MS, Guo Y, Zhang Z, Xu P, Algam SA. Genome-wide Identification of WRKY transcription factor family members in sorghum (Sorghum bicolor (L.) moench). PLoS One 2020; 15:e0236651. [PMID: 32804948 PMCID: PMC7430707 DOI: 10.1371/journal.pone.0236651] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Accepted: 07/10/2020] [Indexed: 12/26/2022] Open
Abstract
WRKY transcription factors regulate diverse biological processes in plants, including abiotic and biotic stress responses, and constitute one of the largest transcription factor families in higher plants. Although the past decade has seen significant progress towards identifying and functionally characterizing WRKY genes in diverse species, little is known about the WRKY family in sorghum (Sorghum bicolor (L.) moench). Here we report the comprehensive identification of 94 putative WRKY transcription factors (SbWRKYs). The SbWRKYs were divided into three groups (I, II, and III), with those in group II further classified into five subgroups (IIa–IIe), based on their conserved domains and zinc finger motif types. WRKYs from the model plant Arabidopsis (Arabidopsis thaliana) were used for the phylogenetic analysis of all SbWRKY genes. Motif analysis showed that all SbWRKYs contained either one or two WRKY domains and that SbWRKYs within the same group had similar motif compositions. SbWRKY genes were located on all 10 sorghum chromosomes, and some gene clusters and two tandem duplications were detected. SbWRKY gene structure analysis showed that they contained 0–7 introns, with most SbWRKY genes consisting of two introns and three exons. Gene ontology (GO) annotation functionally categorized SbWRKYs under cellular components, molecular functions and biological processes. A cis-element analysis showed that all SbWRKYs contain at least one stress response-related cis-element. We exploited publicly available microarray datasets to analyze the expression profiles of 78 SbWRKY genes at different growth stages and in different tissues. The induction of SbWRKYs by different abiotic stresses hinted at their potential involvement in stress responses. qRT-PCR analysis revealed different expression patterns for SbWRKYs during drought stress. Functionally characterized WRKY genes in Arabidopsis and other species will provide clues for the functional characterization of putative orthologs in sorghum. Thus, the present study delivers a solid foundation for future functional studies of SbWRKY genes and their roles in the response to critical stresses such as drought.
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Affiliation(s)
- Elamin Hafiz Baillo
- Center for Agricultural Resources Research, Key Laboratory of Agricultural Water Resources, Hebei Laboratory of Agricultural Water Saving, Institute of Genetics and Developmental Biology, University of Chinese Academy of Sciences, Shijiazhuang, Hebei, China
- University of Chinese Academy of Sciences, Beijing, China
- Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing, China
- Agricultural Research Corporation (ARC), Ministry of Agriculture, Wad Madani, Gezira, Sudan
- * E-mail: ,
| | - Muhammad Sajid Hanif
- Center for Agricultural Resources Research, Key Laboratory of Agricultural Water Resources, Hebei Laboratory of Agricultural Water Saving, Institute of Genetics and Developmental Biology, University of Chinese Academy of Sciences, Shijiazhuang, Hebei, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Yinghui Guo
- Center for Agricultural Resources Research, Key Laboratory of Agricultural Water Resources, Hebei Laboratory of Agricultural Water Saving, Institute of Genetics and Developmental Biology, University of Chinese Academy of Sciences, Shijiazhuang, Hebei, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Zhengbin Zhang
- Center for Agricultural Resources Research, Key Laboratory of Agricultural Water Resources, Hebei Laboratory of Agricultural Water Saving, Institute of Genetics and Developmental Biology, University of Chinese Academy of Sciences, Shijiazhuang, Hebei, China
- University of Chinese Academy of Sciences, Beijing, China
- Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing, China
- * E-mail: ,
| | - Ping Xu
- Center for Agricultural Resources Research, Key Laboratory of Agricultural Water Resources, Hebei Laboratory of Agricultural Water Saving, Institute of Genetics and Developmental Biology, University of Chinese Academy of Sciences, Shijiazhuang, Hebei, China
- University of Chinese Academy of Sciences, Beijing, China
- Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing, China
| | - Soad Ali Algam
- Faculty of Agriculture, University of Khartoum, Khartoum, Sudan
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22
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PA0335, a Gene Encoding Histidinol Phosphate Phosphatase, Mediates Histidine Auxotrophy in Pseudomonas aeruginosa. Appl Environ Microbiol 2020; 86:AEM.02593-19. [PMID: 31862725 DOI: 10.1128/aem.02593-19] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Accepted: 11/24/2019] [Indexed: 11/20/2022] Open
Abstract
The biosynthesis of histidine, a proteinogenic amino acid, has been extensively studied due to its importance in bacterial growth and survival. Histidinol-phosphate phosphatase (Hol-Pase), which is responsible for the penultimate step of histidine biosynthesis, is generally the last enzyme to be characterized in many bacteria because its origin and evolution are more complex compared to other enzymes in histidine biosynthesis. However, none of the enzymes in histidine biosynthesis, including Hol-Pase, have been characterized in Pseudomonas aeruginosa, which is an important opportunistic Gram-negative pathogen that can cause serious human infections. In our previous work, a transposon mutant of P. aeruginosa was found to display a growth defect on glucose-containing minimal solid medium. In this study, we found that the growth defect was due to incomplete histidine auxotrophy caused by PA0335 inactivation. Subsequently, PA0335 was shown to encode Hol-Pase, and its function and enzymatic activity were investigated using genetic and biochemical methods. In addition to PA0335, the roles of 12 other predicted genes involved in histidine biosynthesis in P. aeruginosa were examined. Among them, hisC2 (PA3165), hisH2 (PA3152), and hisF2 (PA3151) were found to be dispensable for histidine synthesis, whereas hisG (PA4449), hisE (PA5067), hisF1 (PA5140), hisB (PA5143), hisI (PA5066), hisC1 (PA4447), and hisA (PA5141) were essential because deletion of each resulted in complete histidine auxotrophy; similar to the case for PA0335, hisH1 (PA5142) or hisD (PA4448) deletion caused incomplete histidine auxotrophy. Taken together, our results outline the histidine synthesis pathway of P. aeruginosa IMPORTANCE Histidine is a common amino acid in proteins. Because it plays critical roles in bacterial metabolism, its biosynthetic pathway in many bacteria has been elucidated. However, the pathway remains unclear in Pseudomonas aeruginosa, an important opportunistic pathogen in clinical settings; in particular, there is scant knowledge about histidinol-phosphate phosphatase (Hol-Pase), which has a complex origin and evolution. In this study, P. aeruginosa Hol-Pase was identified and characterized. Furthermore, the roles of all other predicted genes involved in histidine biosynthesis were examined. Our results illustrate the histidine synthesis pathway of P. aeruginosa The knowledge obtained from this study may help in developing strategies to control P. aeruginosa-related infections. In addition, some enzymes of the histidine synthesis pathway from P. aeruginosa might be used as elements of histidine synthetic biology in other industrial microorganisms.
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