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Henchiri H, Rayapuram N, Alhoraibi HM, Caïus J, Paysant-Le Roux C, Citerne S, Hirt H, Colcombet J, Sturbois B, Bigeard J. Integrated multi-omics and gen etic analyses reveal molecular determinants underlying Arabidopsis snap33 mutant phenotype. Plant J 2024; 118:1016-1035. [PMID: 38281242 DOI: 10.1111/tpj.16647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Revised: 11/17/2023] [Accepted: 01/09/2024] [Indexed: 01/30/2024]
Abstract
The secretory pathway is essential for plant immunity, delivering diverse antimicrobial molecules into the extracellular space. Arabidopsis thaliana soluble N-ethylmaleimide-sensitive-factor attachment protein receptor SNAP33 is a key actor of this process. The snap33 mutant displays dwarfism and necrotic lesions, however the molecular determinants of its macroscopic phenotypes remain elusive. Here, we isolated several new snap33 mutants that exhibited constitutive cell death and H2O2 accumulation, further defining snap33 as an autoimmune mutant. We then carried out quantitative transcriptomic and proteomic analyses showing that numerous defense transcripts and proteins were up-regulated in the snap33 mutant, among which genes/proteins involved in defense hormone, pattern-triggered immunity, and nucleotide-binding domain leucine-rich-repeat receptor signaling. qRT-PCR analyses and hormone dosages supported these results. Furthermore, genetic analyses elucidated the diverse contributions of the main defense hormones and some nucleotide-binding domain leucine-rich-repeat receptor signaling actors in the establishment of the snap33 phenotype, emphasizing the preponderant role of salicylic acid over other defense phytohormones. Moreover, the accumulation of pattern-triggered immunity and nucleotide-binding domain leucine-rich-repeat receptor signaling proteins in the snap33 mutant was confirmed by immunoblotting analyses and further shown to be salicylic acid-dependent. Collectively, this study unveiled molecular determinants underlying the Arabidopsis snap33 mutant phenotype and brought new insights into autoimmunity signaling.
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Affiliation(s)
- Houda Henchiri
- Université Paris-Saclay, CNRS, INRAE, Université Evry, Institute of Plant Sciences Paris-Saclay (IPS2), 91190, Gif-sur-Yvette, France
- Université Paris-Cité, CNRS, INRAE, Institute of Plant Sciences Paris-Saclay (IPS2), 91190, Gif-sur-Yvette, France
| | - Naganand Rayapuram
- Division of Biological and Environmental Sciences and Engineering, King Abdullah University of Science and Technology, Thuwal, 23955, Saudi Arabia
| | - Hanna M Alhoraibi
- Department of Biochemistry, Faculty of Science, King Abdulaziz University, 21551, Jeddah, Saudi Arabia
| | - José Caïus
- Université Paris-Saclay, CNRS, INRAE, Université Evry, Institute of Plant Sciences Paris-Saclay (IPS2), 91190, Gif-sur-Yvette, France
- Université Paris-Cité, CNRS, INRAE, Institute of Plant Sciences Paris-Saclay (IPS2), 91190, Gif-sur-Yvette, France
| | - Christine Paysant-Le Roux
- Université Paris-Saclay, CNRS, INRAE, Université Evry, Institute of Plant Sciences Paris-Saclay (IPS2), 91190, Gif-sur-Yvette, France
- Université Paris-Cité, CNRS, INRAE, Institute of Plant Sciences Paris-Saclay (IPS2), 91190, Gif-sur-Yvette, France
| | - Sylvie Citerne
- Université Paris-Saclay, INRAE, AgroParisTech, Institut Jean-Pierre Bourgin (IJPB), 78000, Versailles, France
| | - Heribert Hirt
- Division of Biological and Environmental Sciences and Engineering, King Abdullah University of Science and Technology, Thuwal, 23955, Saudi Arabia
| | - Jean Colcombet
- Université Paris-Saclay, CNRS, INRAE, Université Evry, Institute of Plant Sciences Paris-Saclay (IPS2), 91190, Gif-sur-Yvette, France
- Université Paris-Cité, CNRS, INRAE, Institute of Plant Sciences Paris-Saclay (IPS2), 91190, Gif-sur-Yvette, France
| | - Bénédicte Sturbois
- Université Paris-Saclay, CNRS, INRAE, Université Evry, Institute of Plant Sciences Paris-Saclay (IPS2), 91190, Gif-sur-Yvette, France
- Université Paris-Cité, CNRS, INRAE, Institute of Plant Sciences Paris-Saclay (IPS2), 91190, Gif-sur-Yvette, France
| | - Jean Bigeard
- Université Paris-Saclay, CNRS, INRAE, Université Evry, Institute of Plant Sciences Paris-Saclay (IPS2), 91190, Gif-sur-Yvette, France
- Université Paris-Cité, CNRS, INRAE, Institute of Plant Sciences Paris-Saclay (IPS2), 91190, Gif-sur-Yvette, France
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Urquhart DS, Dowle H, Moffat K, Forster J, Cunningham S, Macleod KA. Lung clearance index (LCI 2.5) changes after initiation of Elexacaftor/Tezacaftor/Ivacaftor in children with cystic fibrosis aged between 6 and 11 years: The "real-world" differs from trial data. Pediatr Pulmonol 2024; 59:1449-1453. [PMID: 38415920 DOI: 10.1002/ppul.26938] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Revised: 02/02/2024] [Accepted: 02/14/2024] [Indexed: 02/29/2024]
Abstract
BACKGROUND Elexacaftor in combination with Tezacaftor and Ivacaftor (ETI) became licensed in the United Kingdom in early 2022 for children aged 6-11 years with cystic fibrosis (CF) and an eligible mutation. Many in this age group have excellent prior lung health making quantitative measurement of benefit challenging. Clinical trials purport that lung clearance index (LCI2.5) measurement is most suitable for this purpose. OBJECTIVES This study aimed to understand the clinical utility of LCI2.5 in detecting change after commencing ETI in the real world. PATIENT SELECTION/METHODS Baseline anthropometric data were collected along with spirometry (forced expiratory volume in 1 s [FEV1], forced vital capacityFV and LCI2.5 measures in children aged 6-11 years with CF before starting ETI. Measures were repeated after a mean (range) of 8.2 (7-14) months of ETI treatment. The primary endpoint was a change in LCI2.5, with secondary endpoints including change in FEV1 and change in body mass index (BMI) also reported. RESULTS Twelve children were studied (seven male, mean age 9.5 years at baseline). Our study population had a mean (SD) LCI2.5 of 7.01 (1.14) and FEV1 of 96 (13) %predicted at baseline. Mean (95% confidence interval) changes in LCI2.5 [-0.7 (-1.4, 0), p = .06] and BMI [+0.7 (+0.1, +1.3), p = .03] were observed, along with changes in FEV1 of +3.1 (-1.9, +8.1) %predicted. CONCLUSIONS Real-world changes in LCI2.5 (-0.7) are different to those reported in clinical trials (-2.29). Lower baseline LCI2.5 as a result of prior modulator exposure, high baseline lung health, and new LCI2.5 software analyses all contribute to lower LCI2.5 values being recorded in the real world of children with CF.
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Affiliation(s)
- Don S Urquhart
- Department of Paediatric Respiratory and Sleep Medicine, Royal Hospital for Children and Young People, Edinburgh, UK
- Department of Child Life and Health, Edinburgh Bioquarter, University of Edinburgh, Edinburgh, UK
| | - Heather Dowle
- Department of Paediatric Respiratory and Sleep Medicine, Royal Hospital for Children and Young People, Edinburgh, UK
| | - Kellie Moffat
- Department of Paediatric Respiratory and Sleep Medicine, Royal Hospital for Children and Young People, Edinburgh, UK
| | - Jody Forster
- Department of Paediatric Respiratory and Sleep Medicine, Royal Hospital for Children and Young People, Edinburgh, UK
| | - Steve Cunningham
- Department of Paediatric Respiratory and Sleep Medicine, Royal Hospital for Children and Young People, Edinburgh, UK
- Department of Child Life and Health, Edinburgh Bioquarter, University of Edinburgh, Edinburgh, UK
- Centre for Inflammation Research, Institute for Regeneration and Repair, The University of Edinburgh, Edinburgh, UK
| | - Kenneth A Macleod
- Department of Paediatric Respiratory and Sleep Medicine, Royal Hospital for Children and Young People, Edinburgh, UK
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Atteih SE, Armbruster CR, Hilliam Y, Rapsinski GJ, Bhusal JK, Krainz LL, Gaston JR, DuPont M, Zemke AC, Alcorn JF, Moore JA, Cooper VS, Lee SE, Forno E, Bomberger JM. Effects of highly effective modulator therapy on the dynamics of the respiratory mucosal environment and inflammatory response in cystic fibrosis. Pediatr Pulmonol 2024; 59:1266-1273. [PMID: 38353361 PMCID: PMC11058019 DOI: 10.1002/ppul.26898] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Revised: 01/07/2024] [Accepted: 01/27/2024] [Indexed: 04/30/2024]
Abstract
BACKGROUND While the widespread initiation of elexacaftor/tezacaftor/ivacaftor (ETI) has led to dramatic clinical improvements among persons with cystic fibrosis (pwCF), little is known about how ETI affects the respiratory mucosal inflammatory and physiochemical environment, or how these changes relate to lung function. METHODS We performed a prospective, longitudinal study of adults with CF and chronic rhinosinusitis (CF-CRS) followed at our CF center (n = 18). Endoscopic upper respiratory tract (paranasal sinus) aspirates from multiple visit dates, both pre- and post-ETI initiation, were collected and tested for cytokines, metals, pH, and lactate levels. Generalized estimating equations were used to identify relationships between ETI and upper respiratory tract (URT) biomarker levels, and between URT biomarkers and lung function or clinical sinus parameters. RESULTS ETI was associated with decreased upper respiratory mucosal cytokines B-cell activating factor (BAFF), IL-12p40, IL-32, IL-8, IL-22 and soluble tumor necrosis factor-1 (sTNFR1), and an increase in a proliferation-inducing ligand (APRIL) and IL-19. ETI was also associated with decreased URT levels of copper, manganese, and zinc. In turn, lower URT levels of BAFF, IL-8, lactate, and potassium were each associated with ~1.5% to 4.3% improved forced expiratory volume in 1 s (FEV1), while higher levels of IFNγ, iron, and selenium were associated with ~2% to 10% higher FEV1. CONCLUSIONS Our observations suggest a dampening of inflammatory signals and restriction in microbial nutrients in the upper respiratory tract with ETI. These findings improve our understanding of how ETI impacts the mucosal environment in the respiratory tract, and may give insight into the improved infectious and inflammatory status and the resulting clinical improvements seen in pwCF.
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Affiliation(s)
- Samar E. Atteih
- Department of Pediatrics, Division of Pediatric Pulmonology, University of Pittsburgh Medical Center, Children’s Hospital of Pittsburgh, Pittsburgh, PA, USA
| | - Catherine R. Armbruster
- Department of Microbiology and Immunology, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire, USA
| | - Yasmin Hilliam
- Department of Microbiology and Immunology, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire, USA
| | - Glenn J. Rapsinski
- Department of Pediatrics, Division of Pediatric Infectious Diseases, University of Pittsburgh Medical Center, Children’s Hospital of Pittsburgh, Pittsburgh, PA, USA
| | - Junu Koirala Bhusal
- Department of Microbiology and Molecular Genetics, School of Medicine, University of Pittsburgh, Pittsburgh, PA
| | - Leah L. Krainz
- Department of Microbiology and Molecular Genetics, School of Medicine, University of Pittsburgh, Pittsburgh, PA
| | - Jordan R. Gaston
- Department of Microbiology and Molecular Genetics, School of Medicine, University of Pittsburgh, Pittsburgh, PA
| | - Matthew DuPont
- Department of Microbiology and Molecular Genetics, School of Medicine, University of Pittsburgh, Pittsburgh, PA
| | - Anna C. Zemke
- Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - John F. Alcorn
- Department of Pediatrics, University of Pittsburgh Medical Center Children’s Hospital of Pittsburgh, Pittsburgh, Pennsylvania
| | - John A. Moore
- Department of Otolaryngology-Head and Neck Surgery, University of Pittsburgh, Pittsburgh, PA
| | - Vaughn S. Cooper
- Department of Microbiology and Molecular Genetics, School of Medicine, University of Pittsburgh, Pittsburgh, PA
| | - Stella E. Lee
- Division of Otolaryngology, Head and Neck Surgery, Department of Surgery, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA
| | - Erick Forno
- Department of Pediatrics, Division of Pediatric Pulmonology, University of Pittsburgh Medical Center, Children’s Hospital of Pittsburgh, Pittsburgh, PA, USA
| | - Jennifer M. Bomberger
- Department of Microbiology and Immunology, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire, USA
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Jones JDG, Staskawicz BJ, Dangl JL. The plant immune system: From discovery to deployment. Cell 2024; 187:2095-2116. [PMID: 38670067 DOI: 10.1016/j.cell.2024.03.045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2024] [Revised: 03/08/2024] [Accepted: 03/25/2024] [Indexed: 04/28/2024]
Abstract
Plant diseases cause famines, drive human migration, and present challenges to agricultural sustainability as pathogen ranges shift under climate change. Plant breeders discovered Mendelian genetic loci conferring disease resistance to specific pathogen isolates over 100 years ago. Subsequent breeding for disease resistance underpins modern agriculture and, along with the emergence and focus on model plants for genetics and genomics research, has provided rich resources for molecular biological exploration over the last 50 years. These studies led to the identification of extracellular and intracellular receptors that convert recognition of extracellular microbe-encoded molecular patterns or intracellular pathogen-delivered virulence effectors into defense activation. These receptor systems, and downstream responses, define plant immune systems that have evolved since the migration of plants to land ∼500 million years ago. Our current understanding of plant immune systems provides the platform for development of rational resistance enhancement to control the many diseases that continue to plague crop production.
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Affiliation(s)
- Jonathan D G Jones
- Sainsbury Lab, University of East Anglia, Colney Lane, Norwich NR4 7UH, UK.
| | - Brian J Staskawicz
- Department of Plant and Microbial Biology and Innovative Genomics Institute, University of California, Berkeley, Berkeley, CA 94720, USA
| | - Jeffery L Dangl
- Department of Biology, University of North Carolina at Chapel Hill and Howard Hughes Medical Institute, Chapel Hill, NC 27599, USA
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5
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Guo J, King I, Hill A. International disparities in diagnosis and treatment access for cystic fibrosis. Pediatr Pulmonol 2024. [PMID: 38558542 DOI: 10.1002/ppul.26954] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/10/2024] [Revised: 02/17/2024] [Accepted: 02/27/2024] [Indexed: 04/04/2024]
Abstract
BACKGROUND Elexacaftor/tezacaftor/ivacaftor (ETI) has revolutionized cystic fibrosis (CF) treatment. However, previous research has demonstrated profound global disparities in diagnosis and treatment access. If unaddressed, these threaten to widen existing health inequities. Therefore, in this analysis we aimed to reappraise gaps and evaluate progress in diagnosis and treatment equity in high-income (HIC) versus low- and middle-income countries (LMICs). METHODS Estimates of the global CF population were made in 158 countries using patient registries, systematic literature searches, and an international survey of 14 CF experts. Estimates of the global burden of undiagnosed CF were made using epidemiological studies identified in literature searches and registry coverage data. The proportion of people receiving ETI was estimated using publicly available revenue data and a survey of 23 national drug pricing databases. RESULTS 188,336 (163,421-209,204) people are estimated to have CF in 96 countries. Of these, 112,955 (60%) were diagnosed and 51,322 (27%) received ETI. The undiagnosed patient burden is estimated to be 75,381 people, with 82% in LMICs. ETI is reimbursed in 35 HICs, but only one LMIC. Four years after approval, there are 14,911 people diagnosed with CF who live in a country where ETI is inaccessible. This increases to 76,199 when including the estimated undiagnosed population. CONCLUSIONS Equitable access to CFTR modulators must become a top priority for the international CF community. ETI costs up to $322,000 per year but could be manufactured for $5000 to allow access under a voluntary license. Given the extent of disparities, other mechanisms to improve access that circumvent the manufacturer should also be considered.
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Affiliation(s)
- Jonathan Guo
- School of Public Health, Faculty of Medicine, Imperial College London, London, UK
| | - Ibukunoluwa King
- School of Public Health, Faculty of Medicine, Imperial College London, London, UK
| | - Andrew Hill
- Department of Pharmacology and Therapeutics, University of Liverpool, Liverpool, UK
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Sun Y, Liu F, Zeng M, Zhang X, Cui Y, Chen Z, Wang L, Xu Y, Wu J, Guo S, Dong X, Dong S, Wang Y, Wang Y. The ETI-dependent receptor-like kinase 1 positively regulates effector-triggered immunity by stabilizing NLR-required for cell death 4 in Nicotiana benthamiana. New Phytol 2024; 242:576-591. [PMID: 38362937 DOI: 10.1111/nph.19596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Accepted: 01/16/2024] [Indexed: 02/17/2024]
Abstract
Leucine-rich repeat receptor-like kinases (LRR-RLKs) comprise the largest class of membrane-localized receptor-like kinases in plants. Leucine-rich repeat receptor-like kinases are key immune sectors contributing to pattern-triggered immunity (PTI), but whether LRR-RLK mediates effector-triggered immunity (ETI) in plants remains unclear. In this study, we evaluated the function of LRR-RLKs in regulating ETI by using a virus-induced gene silencing (VIGS)-based reverse genetic screening assay, and identified a LRR-RLK named ETI-dependent receptor-like kinase 1 (EDK1) required for ETI triggered by the avirulence effector AVRblb2 secreted by Phytophthora infestans and its cognate receptor Rpi-blb2. Silencing or knockout of EDK1 compromised immunity mediated by Rpi-blb2 and the cell death triggered by recognition of AVRblb2. NLR-required for cell death 4 (NRC4), a signaling component acts downstream of Rpi-blb2, was identified that interacts with EDK1 using the LC-MS analysis and the interaction was further evaluated by co-immunoprecipitation. EDK1 promotes protein accumulation of NRC4 in a kinase-dependent manner and positively regulates resistance to P. infestans in Nicotiana benthamiana. Our study revealed that EDK1 positively regulates plant ETI through modulating accumulation of the NLR signaling component NRC4, representing a new regulatory role of the membrane-localized LRR-RLKs in plant immunity.
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Affiliation(s)
- Yujing Sun
- Department of Plant Pathology, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China
- The Key Laboratory of Plant Immunity, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China
- Key Laboratory of Soybean Disease and Pest Control (Ministry of Agriculture and Rural Affairs), Nanjing Agricultural University, Nanjing, 210095, China
| | - Fan Liu
- Department of Plant Pathology, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China
- The Key Laboratory of Plant Immunity, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China
- Key Laboratory of Soybean Disease and Pest Control (Ministry of Agriculture and Rural Affairs), Nanjing Agricultural University, Nanjing, 210095, China
| | - Mengzhu Zeng
- Department of Plant Pathology, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China
- The Key Laboratory of Plant Immunity, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China
- Key Laboratory of Soybean Disease and Pest Control (Ministry of Agriculture and Rural Affairs), Nanjing Agricultural University, Nanjing, 210095, China
| | - Xinjie Zhang
- Department of Plant Pathology, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China
- The Key Laboratory of Plant Immunity, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China
- Key Laboratory of Soybean Disease and Pest Control (Ministry of Agriculture and Rural Affairs), Nanjing Agricultural University, Nanjing, 210095, China
| | - Ying Cui
- Department of Plant Pathology, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China
- The Key Laboratory of Plant Immunity, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China
- Key Laboratory of Soybean Disease and Pest Control (Ministry of Agriculture and Rural Affairs), Nanjing Agricultural University, Nanjing, 210095, China
| | - Zhaodan Chen
- Department of Plant Pathology, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China
- The Key Laboratory of Plant Immunity, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China
- Key Laboratory of Soybean Disease and Pest Control (Ministry of Agriculture and Rural Affairs), Nanjing Agricultural University, Nanjing, 210095, China
| | - Lei Wang
- Department of Plant Pathology, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China
- The Key Laboratory of Plant Immunity, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China
- Key Laboratory of Soybean Disease and Pest Control (Ministry of Agriculture and Rural Affairs), Nanjing Agricultural University, Nanjing, 210095, China
| | - Yuanpeng Xu
- Department of Plant Pathology, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China
- The Key Laboratory of Plant Immunity, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China
- Key Laboratory of Soybean Disease and Pest Control (Ministry of Agriculture and Rural Affairs), Nanjing Agricultural University, Nanjing, 210095, China
| | - Jinbin Wu
- Department of Plant Pathology, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China
- The Key Laboratory of Plant Immunity, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China
- Key Laboratory of Soybean Disease and Pest Control (Ministry of Agriculture and Rural Affairs), Nanjing Agricultural University, Nanjing, 210095, China
| | - Shengya Guo
- Department of Plant Pathology, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China
| | - Xian Dong
- School of Chinese Materia Medica, Yunnan University of Chinese Medicine, Kunming, 650500, China
| | - Suomeng Dong
- Department of Plant Pathology, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China
- The Key Laboratory of Plant Immunity, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China
- Key Laboratory of Soybean Disease and Pest Control (Ministry of Agriculture and Rural Affairs), Nanjing Agricultural University, Nanjing, 210095, China
| | - Yan Wang
- Department of Plant Pathology, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China
- The Key Laboratory of Plant Immunity, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China
- Key Laboratory of Soybean Disease and Pest Control (Ministry of Agriculture and Rural Affairs), Nanjing Agricultural University, Nanjing, 210095, China
| | - Yuanchao Wang
- Department of Plant Pathology, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China
- The Key Laboratory of Plant Immunity, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China
- Key Laboratory of Soybean Disease and Pest Control (Ministry of Agriculture and Rural Affairs), Nanjing Agricultural University, Nanjing, 210095, China
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7
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Yu XQ, Niu HQ, Liu C, Wang HL, Yin W, Xia X. PTI- ETI synergistic signal mechanisms in plant immunity. Plant Biotechnol J 2024. [PMID: 38470397 DOI: 10.1111/pbi.14332] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Revised: 02/16/2024] [Accepted: 02/28/2024] [Indexed: 03/13/2024]
Abstract
Plants face a relentless onslaught from a diverse array of pathogens in their natural environment, to which they have evolved a myriad of strategies that unfold across various temporal scales. Cell surface pattern recognition receptors (PRRs) detect conserved elicitors from pathogens or endogenous molecules released during pathogen invasion, initiating the first line of defence in plants, known as pattern-triggered immunity (PTI), which imparts a baseline level of disease resistance. Inside host cells, pathogen effectors are sensed by the nucleotide-binding/leucine-rich repeat (NLR) receptors, which then activate the second line of defence: effector-triggered immunity (ETI), offering a more potent and enduring defence mechanism. Moreover, PTI and ETI collaborate synergistically to bolster disease resistance and collectively trigger a cascade of downstream defence responses. This article provides a comprehensive review of plant defence responses, offering an overview of the stepwise activation of plant immunity and the interactions between PTI-ETI synergistic signal transduction.
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Affiliation(s)
- Xiao-Qian Yu
- State Key Laboratory of Tree Genetics and Breeding, College of Biological Sciences and Technology, College of Biological Sciences and Technology, Beijing Forestry University, Beijing, China
| | - Hao-Qiang Niu
- State Key Laboratory of Tree Genetics and Breeding, College of Biological Sciences and Technology, College of Biological Sciences and Technology, Beijing Forestry University, Beijing, China
| | - Chao Liu
- State Key Laboratory of Tree Genetics and Breeding, College of Biological Sciences and Technology, College of Biological Sciences and Technology, Beijing Forestry University, Beijing, China
| | - Hou-Ling Wang
- State Key Laboratory of Tree Genetics and Breeding, College of Biological Sciences and Technology, College of Biological Sciences and Technology, Beijing Forestry University, Beijing, China
| | - Weilun Yin
- State Key Laboratory of Tree Genetics and Breeding, College of Biological Sciences and Technology, College of Biological Sciences and Technology, Beijing Forestry University, Beijing, China
| | - Xinli Xia
- State Key Laboratory of Tree Genetics and Breeding, College of Biological Sciences and Technology, College of Biological Sciences and Technology, Beijing Forestry University, Beijing, China
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8
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Ledger EL, Smith DJ, Teh JJ, Wood ME, Whibley PE, Morrison M, Goldberg JB, Reid DW, Wells TJ. Impact of CFTR Modulation on Pseudomonas aeruginosa Infection in People With Cystic Fibrosis. J Infect Dis 2024:jiae051. [PMID: 38442240 DOI: 10.1093/infdis/jiae051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Accepted: 01/29/2024] [Indexed: 03/07/2024] Open
Abstract
BACKGROUND Pseudomonas aeruginosa is a multidrug-resistant pathogen causing recalcitrant pulmonary infections in people with cystic fibrosis (pwCF). Cystic fibrosis transmembrane conductance regulator (CFTR) modulators have been developed that partially correct the defective chloride channel driving disease. Despite the many clinical benefits, studies in adults have demonstrated that while P. aeruginosa sputum load decreases, chronic infection persists. Here, we investigate how P. aeruginosa in pwCF may change in the altered lung environment after CFTR modulation. METHODS P. aeruginosa strains (n = 105) were isolated from the sputum of 11 chronically colonized pwCF at baseline and up to 21 months posttreatment with elexacaftor-tezacaftor-ivacaftor or tezacaftor-ivacaftor. Phenotypic characterization and comparative genomics were performed. RESULTS Clonal lineages of P. aeruginosa persisted after therapy, with no evidence of displacement by alternative strains. We identified commonly mutated genes among patient isolates that may be positively selected for in the CFTR-modulated lung. However, classic chronic P. aeruginosa phenotypes such as mucoid morphology were sustained, and isolates remained just as resistant to clinically relevant antibiotics. CONCLUSIONS Despite the clinical benefits of CFTR modulators, clonal lineages of P. aeruginosa persist that may prove just as difficult to manage in the future, especially in pwCF with advanced lung disease.
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Affiliation(s)
- Emma L Ledger
- Frazer Institute, Faculty of Medicine, The University of Queensland, Brisbane, Australia
| | - Daniel J Smith
- Northside Clinical Unit, The University of Queensland, Brisbane, Australia
- Adult Cystic Fibrosis Centre, The Prince Charles Hospital, Brisbane, Australia
| | - Jing Jie Teh
- Frazer Institute, Faculty of Medicine, The University of Queensland, Brisbane, Australia
| | - Michelle E Wood
- Adult Cystic Fibrosis Centre, The Prince Charles Hospital, Brisbane, Australia
| | - Page E Whibley
- Adult Cystic Fibrosis Centre, The Prince Charles Hospital, Brisbane, Australia
| | - Mark Morrison
- Frazer Institute, Faculty of Medicine, The University of Queensland, Brisbane, Australia
- Australian Infectious Diseases Research Centre, Brisbane, Australia
| | - Joanna B Goldberg
- Department of Pediatrics, Division of Pulmonary, Asthma, Cystic Fibrosis, and Sleep, Emory University School of Medicine, Atlanta, Georgia, USA
| | - David W Reid
- Northside Clinical Unit, The University of Queensland, Brisbane, Australia
- Australian Infectious Diseases Research Centre, Brisbane, Australia
- QIMR Berghofer Medical Research Institute, Brisbane, Australia
| | - Timothy J Wells
- Frazer Institute, Faculty of Medicine, The University of Queensland, Brisbane, Australia
- Australian Infectious Diseases Research Centre, Brisbane, Australia
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9
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Palukaitis P, Yoon JY. Defense signaling pathways in resistance to plant viruses: Crosstalk and finger pointing. Adv Virus Res 2024; 118:77-212. [PMID: 38461031 DOI: 10.1016/bs.aivir.2024.01.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/11/2024]
Abstract
Resistance to infection by plant viruses involves proteins encoded by plant resistance (R) genes, viz., nucleotide-binding leucine-rich repeats (NLRs), immune receptors. These sensor NLRs are activated either directly or indirectly by viral protein effectors, in effector-triggered immunity, leading to induction of defense signaling pathways, resulting in the synthesis of numerous downstream plant effector molecules that inhibit different stages of the infection cycle, as well as the induction of cell death responses mediated by helper NLRs. Early events in this process involve recognition of the activation of the R gene response by various chaperones and the transport of these complexes to the sites of subsequent events. These events include activation of several kinase cascade pathways, and the syntheses of two master transcriptional regulators, EDS1 and NPR1, as well as the phytohormones salicylic acid, jasmonic acid, and ethylene. The phytohormones, which transit from a primed, resting states to active states, regulate the remainder of the defense signaling pathways, both directly and by crosstalk with each other. This regulation results in the turnover of various suppressors of downstream events and the synthesis of various transcription factors that cooperate and/or compete to induce or suppress transcription of either other regulatory proteins, or plant effector molecules. This network of interactions results in the production of defense effectors acting alone or together with cell death in the infected region, with or without the further activation of non-specific, long-distance resistance. Here, we review the current state of knowledge regarding these processes and the components of the local responses, their interactions, regulation, and crosstalk.
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Affiliation(s)
- Peter Palukaitis
- Graduate School of Plant Protection and Quarantine, Jeonbuk National University, Jeonju, Jeollabuk-do, Republic of Korea.
| | - Ju-Yeon Yoon
- Graduate School of Plant Protection and Quarantine, Jeonbuk National University, Jeonju, Jeollabuk-do, Republic of Korea.
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10
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Maradiaga RD, Ramsey ML, Kirkby SE, Sobotka LA. The Role of Cystic Fibrosis Transmembrane Conductance Regulator Modulators After Liver Transplantation in Persons With Cystic Fibrosis. ACG Case Rep J 2024; 11:e01261. [PMID: 38234978 PMCID: PMC10793987 DOI: 10.14309/crj.0000000000001261] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Accepted: 12/21/2023] [Indexed: 01/19/2024] Open
Abstract
Despite advances in treatment for cystic fibrosis (CF), liver disease remains a major contributor to morbidity and mortality for persons with CF. Therefore, liver transplantation may be considered in end-stage CF-related liver disease. We present a young patient with CF who underwent solo liver transplantation and has successfully restarted on elexacaftor/tezacaftor/ivacaftor without significant pulmonary or hepatic complications after transplant.
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Affiliation(s)
- Richard D. Maradiaga
- Department of Internal Medicine, The Ohio State University Wexner Medical Center, Columbus, OH
| | - Mitchell L. Ramsey
- Division of Gastroenterology, Hepatology and Nutrition, The Ohio State University Wexner Medical Center, Columbus, OH
| | - Stephen E. Kirkby
- Division of Pulmonary, Allergy, Critical Care and Sleep Medicine, The Ohio State University Wexner Medical Center, Columbus, OH
| | - Lindsay A. Sobotka
- Division of Gastroenterology, Hepatology and Nutrition, The Ohio State University Wexner Medical Center, Columbus, OH
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11
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Hergenroeder GE, Faino A, Bridges G, Bartlett LE, Cogen JD, Green N, McNamara S, Nichols DP, Ramos KJ. The impact of elexacaftor/tezacaftor/ivacaftor on fat-soluble vitamin levels in people with cystic fibrosis. J Cyst Fibros 2023; 22:1048-1053. [PMID: 37563007 PMCID: PMC10843772 DOI: 10.1016/j.jcf.2023.08.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Revised: 08/04/2023] [Accepted: 08/05/2023] [Indexed: 08/12/2023]
Abstract
BACKGROUND While elexacaftor/tezacaftor/ivacaftor (ETI) has improved the pulmonary health of many people with cystic fibrosis (PwCF), less is known about ETI effectiveness for extra-pulmonary manifestations, including fat-soluble vitamin malabsorption. This study aims to evaluate ETI's impact on vitamin A, D, E, and international normalized ratio (INR, an indirect marker for Vitamin K) serum levels. METHODS Retrospective cohort study of PwCF ≥12 years receiving ETI. Vitamin levels up to four years preceding and up to two years following ETI initiation were collected. Pairwise comparisons of vitamin levels pre/post-ETI initiation were made using Wilcoxon signed rank and McNemar's tests. Linear mixed effect models were used to regress vitamin levels on time since starting ETI, ETI use (yes/no), the interaction between time and ETI use, and age. RESULTS Two hundred and sixty-four participants met study inclusion, and 169 (64%) had post-ETI initiation vitamin levels. Median vitamin A levels increased from 422.0 to 471.0 mcg/L (p < 0.001), median vitamin D levels increased from 28.5 to 30.8 ng/mL (p = 0.003), and there were no significant changes in median vitamin E or INR. Vitamin A levels rose at a rate of 40.7 mcg/L/year (CI 11.3, 70.2) after ETI start. CONCLUSIONS ETI initiation is associated with increased median vitamin A and vitamin D levels, but no change in median vitamin E or INR levels. Ongoing monitoring of vitamin levels after ETI initiation is needed to screen for potential deficiencies and toxicities, particularly in light of case reports of hypervitaminosis A following ETI initiation.
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Affiliation(s)
- Georgene E Hergenroeder
- Division of Pulmonary and Sleep Medicine, Seattle Children's Hospital; Department of Pediatrics, University of Washington.
| | - Anna Faino
- Core for Biostatistics, Epidemiology, and Analytics in Research, Seattle Children's Research Institute
| | - Gracia Bridges
- Division of Pulmonary and Sleep Medicine, Seattle Children's Hospital
| | - Lauren E Bartlett
- Department of Medicine, Division of Pulmonary, Critical Care and Sleep Medicine, University of Washington
| | - Jonathan D Cogen
- Division of Pulmonary and Sleep Medicine, Seattle Children's Hospital; Department of Pediatrics, University of Washington
| | - Nicole Green
- Department of Pediatrics, University of Washington; Division of Gastroenterology and Hepatology, Seattle Children's Hospital
| | - Sharon McNamara
- Division of Pulmonary and Sleep Medicine, Seattle Children's Hospital
| | | | - Kathleen J Ramos
- Department of Medicine, Division of Pulmonary, Critical Care and Sleep Medicine, University of Washington
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12
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Fallahzadeh-Mamaghami V, Weber H, Kemmerling B. BAK-up: the receptor kinase BAK-TO-LIFE 2 enhances immunity when BAK1 is lacking. Stress Biol 2023; 3:42. [PMID: 37747566 PMCID: PMC10519891 DOI: 10.1007/s44154-023-00124-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2023] [Accepted: 09/13/2023] [Indexed: 09/26/2023]
Abstract
BRI1-ASSOCIATED KINASE 1 (BAK1/SERK3) and its closest homolog BAK1-LIKE 1 (BKK1/SERK4) are leucine-rich repeat receptor kinases (LRR-RKs) belonging to the SOMATIC EMBRYOGENESIS RECEPTOR KINASE (SERK) family. They act as co-receptors of various other LRR-RKs and participate in multiple signaling events by complexing and transphosphorylating ligand-binding receptors. Initially identified as the brassinosteroid receptor BRASSINOSTEROID INSENSITIVE 1 (BRI1) co-receptor, BAK1 also functions in plant immunity by interacting with pattern recognition receptors. Mutations in BAK1 and BKK1 cause severely stunted growth and cell death, characterized as autoimmune cell death. Several factors play a role in this type of cell death, including RKs and components of effector-triggered immunity (ETI) signaling pathways, glycosylation factors, ER quality control components, nuclear trafficking components, ion channels, and Nod-like receptors (NLRs). The Shan lab has recently discovered a novel RK BAK-TO-LIFE 2 (BTL2) that interacts with BAK1 and triggers cell death in the absence of BAK1 and BKK1. This RK compensates for the loss of BAK1-mediated pattern-triggered immunity (PTI) by activating phytocytokine-mediated immune and cell death responses.
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Affiliation(s)
| | - Hannah Weber
- ZMBP, University Tübingen, Auf der Morgenstelle 32, Tübingen, 72076, Germany
| | - Birgit Kemmerling
- ZMBP, University Tübingen, Auf der Morgenstelle 32, Tübingen, 72076, Germany.
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13
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Zhu F, Shang J, Wong SM. Editorial: Induced plant resistance against pathogens by application of bioactive molecules. Front Plant Sci 2023; 14:1282909. [PMID: 37799561 PMCID: PMC10548378 DOI: 10.3389/fpls.2023.1282909] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Accepted: 09/14/2023] [Indexed: 10/07/2023]
Affiliation(s)
- Feng Zhu
- College of Plant Protection, Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education of China, Yangzhou University, Yangzhou, Jiangsu, China
| | - Jing Shang
- College of Agronomy, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Sek-Man Wong
- Department of Biological Sciences, National University of Singapore, Singapore, Singapore
- National University of Singapore Suzhou Research Institute, Suzhou Industrial Park, Suzhou, Jiangsu, China
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14
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Yu B, Liu N, Huang L, Luo H, Zhou X, Lei Y, Yan L, Wang X, Chen W, Kang Y, Ding Y, Jin G, Pandey MK, Janila P, Kishan Sudini H, Varshney RK, Jiang H, Liu S, Liao B. Identification and application of a candidate gene AhAftr1 for aflatoxin production resistance in peanut seed (Arachis hypogaea L.). J Adv Res 2023:S2090-1232(23)00263-1. [PMID: 37739123 DOI: 10.1016/j.jare.2023.09.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2023] [Revised: 09/15/2023] [Accepted: 09/17/2023] [Indexed: 09/24/2023] Open
Abstract
INTRODUCTION Peanut is susceptible to infection of Aspergillus fungi and conducive to aflatoxin contamination, hence developing aflatoxin-resistant variety is highly meaningful. Identifying functional genes or loci conferring aflatoxin resistance and molecular diagnostic marker are crucial for peanut breeding. OBJECTIVES This work aims to (1) identify candidate gene for aflatoxin production resistance, (2) reveal the related resistance mechanism, and (3) develop diagnostic marker for resistance breeding program. METHODS Resistance to aflatoxin production in a recombined inbred line (RIL) population derived from a high-yielding variety Xuhua13 crossed with an aflatoxin-resistant genotype Zhonghua 6 was evaluated under artificial inoculation for three consecutive years. Both genetic linkage analysis and QTL-seq were conducted for QTL mapping. The candidate gene was further fine-mapped using a secondary segregation mapping population and validated by transgenic experiments. RNA-Seq analysis among resistant and susceptible RILs was used to reveal the resistance pathway for the candidate genes. RESULTS The major effect QTL qAFTRA07.1 for aflatoxin production resistance was mapped to a 1.98 Mbp interval. A gene, AhAftr1 (Arachis hypogaea Aflatoxin resistance 1), was detected structure variation (SV) in leucine rich repeat (LRR) domain of its production, and involved in disease resistance response through the effector-triggered immunity (ETI) pathway. Transgenic plants with overexpression of AhAftr1(ZH6) exhibited 57.3% aflatoxin reduction compared to that of AhAftr1(XH13). A molecular diagnostic marker AFTR.Del.A07 was developed based on the SV. Thirty-six lines, with aflatoxin content decrease by over 77.67% compared to the susceptible control Zhonghua12 (ZH12), were identified from a panel of peanut germplasm accessions and breeding lines through using AFTR.Del.A07. CONCLUSION Our findings would provide insights of aflatoxin production resistance mechanisms and laid meaningful foundation for further breeding programs.
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Affiliation(s)
- Bolun Yu
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture Oil Crops Research Institute (OCRI), Chinese Academy of Agricultural Sciences (CAAS), Wuhan, China
| | - Nian Liu
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture Oil Crops Research Institute (OCRI), Chinese Academy of Agricultural Sciences (CAAS), Wuhan, China
| | - Li Huang
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture Oil Crops Research Institute (OCRI), Chinese Academy of Agricultural Sciences (CAAS), Wuhan, China
| | - Huaiyong Luo
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture Oil Crops Research Institute (OCRI), Chinese Academy of Agricultural Sciences (CAAS), Wuhan, China
| | - Xiaojing Zhou
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture Oil Crops Research Institute (OCRI), Chinese Academy of Agricultural Sciences (CAAS), Wuhan, China
| | - Yong Lei
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture Oil Crops Research Institute (OCRI), Chinese Academy of Agricultural Sciences (CAAS), Wuhan, China
| | - Liying Yan
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture Oil Crops Research Institute (OCRI), Chinese Academy of Agricultural Sciences (CAAS), Wuhan, China
| | - Xin Wang
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture Oil Crops Research Institute (OCRI), Chinese Academy of Agricultural Sciences (CAAS), Wuhan, China
| | - Weigang Chen
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture Oil Crops Research Institute (OCRI), Chinese Academy of Agricultural Sciences (CAAS), Wuhan, China
| | - Yanping Kang
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture Oil Crops Research Institute (OCRI), Chinese Academy of Agricultural Sciences (CAAS), Wuhan, China
| | - Yingbin Ding
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture Oil Crops Research Institute (OCRI), Chinese Academy of Agricultural Sciences (CAAS), Wuhan, China
| | - Gaorui Jin
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture Oil Crops Research Institute (OCRI), Chinese Academy of Agricultural Sciences (CAAS), Wuhan, China
| | - Manish K Pandey
- International Crops Research Institute for the Semi-Aird Tropics (ICRISAT), Hyderabad, Telangana, India
| | - Pasupuleti Janila
- International Crops Research Institute for the Semi-Aird Tropics (ICRISAT), Hyderabad, Telangana, India
| | - Hari Kishan Sudini
- International Crops Research Institute for the Semi-Aird Tropics (ICRISAT), Hyderabad, Telangana, India
| | - Rajeev K Varshney
- Centre for Crop and Food Innovation, State Agricultural Biotechnology Centre, Food Futures Institute, Murdoch University, Murdoch, Australia
| | - Huifang Jiang
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture Oil Crops Research Institute (OCRI), Chinese Academy of Agricultural Sciences (CAAS), Wuhan, China
| | - Shengyi Liu
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture Oil Crops Research Institute (OCRI), Chinese Academy of Agricultural Sciences (CAAS), Wuhan, China
| | - Boshou Liao
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture Oil Crops Research Institute (OCRI), Chinese Academy of Agricultural Sciences (CAAS), Wuhan, China.
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15
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Sharma S, Sett S, Das T, Prasad A, Prasad M. Recent perspective of non-coding RNAs at the nexus of plant-pathogen interaction. Plant Physiol Biochem 2023; 201:107852. [PMID: 37356385 DOI: 10.1016/j.plaphy.2023.107852] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Revised: 06/06/2023] [Accepted: 06/18/2023] [Indexed: 06/27/2023]
Abstract
In natural habitats, plants are exploited by pathogens in biotrophic or necrotrophic ways. Concurrently, plants have evolved their defense systems for rapid perception of pathogenic effectors and begin concerted cellular reprogramming pathways to confine the pathogens at the entry sites. During the reorganization of cellular signaling mechanisms following pathogen attack, non-coding RNAs serves an indispensable role either as a source of resistance or susceptibility. Besides the well-studied functions of non-coding RNAs related to plant development and abiotic stress responses, previous and recent discoveries have established that non-coding RNAs like miRNAs, siRNAs, lncRNAs and phasi-RNAs can fine tune plant defense responses by targeting various signaling pathways. In this review, recapitulation of previous reports associated with non-coding RNAs as a defense responder against virus, bacteria and fungus attacks and insightful discussion will lead us to conceive innovative ideas to fight against approaching threats of resistant breaking pathogens.
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Affiliation(s)
| | - Susmita Sett
- National Institute of Plant Genome Research, New Delhi, India.
| | - Tuhin Das
- National Institute of Plant Genome Research, New Delhi, India.
| | - Ashish Prasad
- Department of Botany, Kurukshetra University, Kurukshetra, India.
| | - Manoj Prasad
- National Institute of Plant Genome Research, New Delhi, India; Department of Plant Sciences, University of Hyderabad, Hyderabad, India.
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16
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Kim H, Ahn YJ, Lee H, Chung EH, Segonzac C, Sohn KH. Diversified host target families mediate convergently evolved effector recognition across plant species. Curr Opin Plant Biol 2023; 74:102398. [PMID: 37295296 DOI: 10.1016/j.pbi.2023.102398] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Revised: 05/13/2023] [Accepted: 05/15/2023] [Indexed: 06/12/2023]
Abstract
Recognition of pathogen effectors is a crucial step for triggering plant immunity. Resistance (R) genes often encode for nucleotide-binding leucine-rich repeat receptors (NLRs), and NLRs detect effectors from pathogens to trigger effector-triggered immunity (ETI). NLR recognition of effectors is observed in diverse forms where NLRs directly interact with effectors or indirectly detect effectors by monitoring host guardees/decoys (HGDs). HGDs undergo different biochemical modifications by diverse effectors and expand the effector recognition spectrum of NLRs, contributing robustness to plant immunity. Interestingly, in many cases of the indirect recognition of effectors, HGD families targeted by effectors are conserved across the plant species while NLRs are not. Notably, a family of diversified HGDs can activate multiple non-orthologous NLRs across plant species. Further investigation on HGDs would reveal the mechanistic basis of how the diversification of HGDs confers novel effector recognition by NLRs.
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Affiliation(s)
- Haseong Kim
- Plant Immunity Research Center, Seoul National University, Seoul, 08826, Republic of Korea
| | - Ye Jin Ahn
- Department of Life Sciences, Pohang University of Science and Technology, Pohang, 37673, Republic of Korea
| | - Hyeonjung Lee
- Department of Life Sciences, Pohang University of Science and Technology, Pohang, 37673, Republic of Korea
| | - Eui-Hwan Chung
- Department of Plant Biotechnology, Korea University, Seoul, 02841, Republic of Korea
| | - Cécile Segonzac
- Plant Immunity Research Center, Seoul National University, Seoul, 08826, Republic of Korea; Department of Agriculture, Forestry and Bioresources, Seoul National University, Seoul, 08826, Republic of Korea; Plant Genomics and Breeding Institute, Seoul National University, Seoul, 08826, Republic of Korea; Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, 08826, Republic of Korea
| | - Kee Hoon Sohn
- Plant Immunity Research Center, Seoul National University, Seoul, 08826, Republic of Korea; Plant Genomics and Breeding Institute, Seoul National University, Seoul, 08826, Republic of Korea; Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, 08826, Republic of Korea; Department of Agricultural Biotechnology, Seoul National University, Seoul, 08826, Republic of Korea.
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17
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Iakovidis M, Chung EH, Saile SC, Sauberzweig E, El Kasmi F. The emerging frontier of plant immunity's core hubs. FEBS J 2023; 290:3311-3335. [PMID: 35668694 DOI: 10.1111/febs.16549] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Revised: 05/20/2022] [Accepted: 06/06/2022] [Indexed: 12/15/2022]
Abstract
The ever-growing world population, increasingly frequent extreme weather events and conditions, emergence of novel devastating crop pathogens and the social strive for quality food products represent a huge challenge for current and future agricultural production systems. To address these challenges and find realistic solutions, it is becoming more important by the day to understand the complex interactions between plants and the environment, mainly the associated organisms, but in particular pathogens. In the past several years, research in the fields of plant pathology and plant-microbe interactions has enabled tremendous progress in understanding how certain receptor-based plant innate immune systems function to successfully prevent infections and diseases. In this review, we highlight and discuss some of these new ground-breaking discoveries and point out strategies of how pathogens counteract the function of important core convergence hubs of the plant immune system. For practical reasons, we specifically place emphasis on potential applications that can be detracted by such discoveries and what challenges the future of agriculture has to face, but also how these challenges could be tackled.
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Affiliation(s)
- Michail Iakovidis
- Horticultural Genetics and Biotechnology Department, Mediterranean Agricultural Institute of Chania, Greece
| | - Eui-Hwan Chung
- Department of Plant Biotechnology, College of Life Sciences & Biotechnology, Korea University, Seoul, Korea
| | - Svenja C Saile
- Centre for Plant Molecular Biology, University of Tübingen, Germany
| | - Elke Sauberzweig
- Centre for Plant Molecular Biology, University of Tübingen, Germany
| | - Farid El Kasmi
- Centre for Plant Molecular Biology, University of Tübingen, Germany
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18
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Abstract
Soybean (Glycine max) is one of the most important commercial crops worldwide. Soybean hosts diverse microbes, including pathogens that may cause diseases and symbionts that contribute to nitrogen fixation. Study on soybean-microbe interactions to understand pathogenesis, immunity, and symbiosis represents an important research direction toward plant protection in soybean. In terms of immune mechanisms, current research in soybean lags far behind that in the model plants Arabidopsis and rice. In this review, we summarized the shared and unique mechanisms involved in the two-tiered plant immunity and the virulence function of pathogen effectors between soybean and Arabidopsis, providing a molecular roadmap for future research on soybean immunity. We also discussed disease resistance engineering and future perspectives in soybean.
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Affiliation(s)
- Weiwei Rao
- National Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, China
| | - Li Wan
- National Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, China
| | - Ertao Wang
- National Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, China
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19
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Jha UC, Nayyar H, Chattopadhyay A, Beena R, Lone AA, Naik YD, Thudi M, Prasad PVV, Gupta S, Dixit GP, Siddique KHM. Major viral diseases in grain legumes: designing disease resistant legumes from plant breeding and OMICS integration. Front Plant Sci 2023; 14:1183505. [PMID: 37229109 PMCID: PMC10204772 DOI: 10.3389/fpls.2023.1183505] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Accepted: 04/05/2023] [Indexed: 05/27/2023]
Abstract
Grain legumes play a crucial role in human nutrition and as a staple crop for low-income farmers in developing and underdeveloped nations, contributing to overall food security and agroecosystem services. Viral diseases are major biotic stresses that severely challenge global grain legume production. In this review, we discuss how exploring naturally resistant grain legume genotypes within germplasm, landraces, and crop wild relatives could be used as promising, economically viable, and eco-environmentally friendly solution to reduce yield losses. Studies based on Mendelian and classical genetics have enhanced our understanding of key genetic determinants that govern resistance to various viral diseases in grain legumes. Recent advances in molecular marker technology and genomic resources have enabled us to identify genomic regions controlling viral disease resistance in various grain legumes using techniques such as QTL mapping, genome-wide association studies, whole-genome resequencing, pangenome and 'omics' approaches. These comprehensive genomic resources have expedited the adoption of genomics-assisted breeding for developing virus-resistant grain legumes. Concurrently, progress in functional genomics, especially transcriptomics, has helped unravel underlying candidate gene(s) and their roles in viral disease resistance in legumes. This review also examines the progress in genetic engineering-based strategies, including RNA interference, and the potential of synthetic biology techniques, such as synthetic promoters and synthetic transcription factors, for creating viral-resistant grain legumes. It also elaborates on the prospects and limitations of cutting-edge breeding technologies and emerging biotechnological tools (e.g., genomic selection, rapid generation advances, and CRISPR/Cas9-based genome editing tool) in developing virus-disease-resistant grain legumes to ensure global food security.
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Affiliation(s)
- Uday Chand Jha
- Indian Institute of Pulses Research (IIPR), Indian Council of Agricultural Research (ICAR), Kanpur, Uttar Pradesh, India
| | - Harsh Nayyar
- Department of Botany, Panjab University, Chandigarh, India
| | - Anirudha Chattopadhyay
- Department of Plant Pathology, Pulse Research Station, S.D. Agricultural University SK Nagar, SK Nagar, Gujarat, India
| | - Radha Beena
- Department of Plant Physiology, College of Agriculture, Vellayani, Kerala Agricultural University (KAU), Thiruvananthapuram, Kerala, India
| | - Ajaz A. Lone
- Dryland Agriculture Research Station, Sher-e-Kashmir University of Agricultural Sciences and Technology (SKUAST)-Kashmir, Srinagar, India
| | - Yogesh Dashrath Naik
- Department of Agricultural Biotechnology and Molecular Biology, Dr. Rajendra Prasad Central Agricultural University, Samatipur, Bihar, India
| | - Mahendar Thudi
- Department of Agricultural Biotechnology and Molecular Biology, Dr. Rajendra Prasad Central Agricultural University, Samatipur, Bihar, India
- Shandong Academy of Agricultural Sciences, Jinan, Shandong, China
- Center for Crop Health, University of Southern Queensland, Toowoomba, QLD, Australia
| | | | - Sanjeev Gupta
- Indian Council of Agricultural Research, New Delhi, India
| | - Girish Prasad Dixit
- Indian Institute of Pulses Research (IIPR), Indian Council of Agricultural Research (ICAR), Kanpur, Uttar Pradesh, India
| | - Kadambot H. M. Siddique
- The University of Western Australia (UWA) Institute of Agriculture, The University of Western Australia, Perth, WA, Australia
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20
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Cong S, Li JZ, Xiong ZZ, Wei HL. Diverse interactions of five core type III effectors from Ralstonia solanacearum with plants. J Genet Genomics 2023; 50:341-352. [PMID: 35597445 DOI: 10.1016/j.jgg.2022.04.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2022] [Revised: 04/29/2022] [Accepted: 04/30/2022] [Indexed: 11/24/2022]
Abstract
Ralstonia solanacearum is a widespread plant bacterial pathogen that can launch a range of type III effectors (T3Es) to cause disease. In this study, we isolate a pathogenic R. solanacearum strain named P380 from tomato rhizosphere. Five out of 12 core T3Es of strain P380 are introduced into Pseudomonas syringae DC3000D36E separately to determine their functions in interacting with plants. DC3000D36E that harbors each effector suppresses FliC-triggered Pti5 and ACRE31 expression, ROS burst, and callose deposition. RipAE, RipU, and RipW elicit cell death as well as upregulate the MAPK cascades in Nicotiana benthamiana. The derivatives RipC1ΔDXDX(T/V) and RipWΔDKXXQ but not RipAEK310R fail to suppress ROS burst. Moreover, RipAEK310R and RipWΔDKXXQ retain the cell death elicitation ability. RipAE and RipW are associated with salicylic acid and jasmonic acid pathways, respectively. RipAE and RipAQ significantly promote the propagation of DC3000D36E in plants. The five core T3Es localize in diverse subcellular organelles of nucleus, plasma membrane, endoplasmic reticulum, and Golgi network. The suppressor of G2 allele of Skp1 is required for RipAE but not RipU-triggered cell death in N. benthamiana. These results indicate that the core T3Es in R. solanacearum play diverse roles in plant-pathogen interactions.
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Affiliation(s)
- Shen Cong
- Key Laboratory of Microbial Resources Collection and Preservation, Ministry of Agriculture and Rural Affairs, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Jun-Zhou Li
- Key Laboratory of Microbial Resources Collection and Preservation, Ministry of Agriculture and Rural Affairs, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Zheng-Zhong Xiong
- Key Laboratory of Microbial Resources Collection and Preservation, Ministry of Agriculture and Rural Affairs, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Hai-Lei Wei
- Key Laboratory of Microbial Resources Collection and Preservation, Ministry of Agriculture and Rural Affairs, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
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21
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Leibman-Markus M, Gupta R, Schuster S, Avni A, Bar M. Members of the tomato NRC4 h-NLR family augment each other in promoting basal immunity. Plant Sci 2023; 330:111632. [PMID: 36758729 DOI: 10.1016/j.plantsci.2023.111632] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Revised: 01/16/2023] [Accepted: 02/05/2023] [Indexed: 06/18/2023]
Abstract
Plants possess an efficient, two-tiered immune system to combat pathogens and pests. Several decades of research have characterized different features of these two well-known tiers, PTI and ETI (Pattern/ Effector-triggered Immunity). NLR (Nucleotide-binding domain Leucine-rich Repeat) receptors have been found to link PTI to ETI, and be required for full potentiation of plant immune responses in several systems. Intra-cellular helper-NLRs (h-NLRs) mediate ETI and have been focused on extensively in recent research. Previously, we investigated the roles of the h-NLR SlNRC4a in tomato immunity, finding that a specific mutation in this gene results in gain of function constitutive defense activation and broad disease resistance. Deletion of the entire NRC4 clade, which contains 3 genes, can compromise tomato immunity. Here, we decided to investigate the role of an additional clade member, SlNRC4b, in basal immunity. We generated a gain of function mutant in SlNRC4b using CRISPR-Cas9, as well as a double gain of function mutant in both genes. Similarly to the slnrc4a mutant, a slnrc4b mutant also possessed increased basal immunity and broad spectrum disease resistance. The double mutant displayed additive effects in some cases, with significant increases in resistance to fungal phytopathogens as compared with each of the single mutants. Our work confirms that the NRC4 family h-NLRs are important in the plant immune system, suggesting that this gene family has the potential to be promising in targeted agricultural adaptation in the Solanaceae family, promoting disease resistance and prevention of yield loss to pathogens.
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Affiliation(s)
- Meirav Leibman-Markus
- Department of Plant Pathology and Weed Research, ARO, Volcani Institute, Rishon LeZion, Israel; School of Plant Sciences and Food Security, Tel Aviv University, Tel Aviv, Israel
| | - Rupali Gupta
- Department of Plant Pathology and Weed Research, ARO, Volcani Institute, Rishon LeZion, Israel
| | - Silvia Schuster
- School of Plant Sciences and Food Security, Tel Aviv University, Tel Aviv, Israel
| | - Adi Avni
- School of Plant Sciences and Food Security, Tel Aviv University, Tel Aviv, Israel
| | - Maya Bar
- Department of Plant Pathology and Weed Research, ARO, Volcani Institute, Rishon LeZion, Israel.
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22
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Schnell A, Hober H, Kaiser N, Ruppel R, Geppert A, Tremel C, Sobel J, Plattner E, Woelfle J, Hoerning A. Elexacaftor - Tezacaftor - Ivacaftor treatment improves systemic infection parameters and Pseudomonas aeruginosa colonization rate in patients with cystic fibrosis a monocentric observational study. Heliyon 2023; 9:e15756. [PMID: 37153441 PMCID: PMC10160512 DOI: 10.1016/j.heliyon.2023.e15756] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Revised: 03/30/2023] [Accepted: 04/20/2023] [Indexed: 05/09/2023] Open
Abstract
Background & aims The CFTR-modulating therapy Elexaftor - Tezacaftor - Ivacaftor (ETI) has been widely prescribed since its approval in 2020 in the European Union. The aim of this study was to methodically evaluate the effects of an ETI treatment on clinical, biochemical data and Pseudomonas colonization in order to demonstrate its efficacy. Methods This prospective monocentric study comprised 69 patients diagnosed with cystic fibrosis aged at least 12 years and treated with ETI between September 2020 and November 2021. Clinical and laboratory data of each patient and study visit were collected before and after 24 weeks of ETI treatment. Follow-up status of Pseudomonas aeruginosa (PsA) colonization was assessed after one year of therapy by regularly determined sputum or throat swab samples. Results Marked improvements biochemical markers of systemic inflammation as white blood cell count, levels of immunoglobulins A, G and M and albumin within 24 weeks of therapy were observed. ETI treatment proved to be effective as seen by amelioration of lung function and sweat chloride concentration. Assessment of PsA colonization status revealed a conversion from a positive to negative detection in 36% of the cases after one year of therapy. Conclusions ETI treatment effectively improves systemic inflammation parameters and shows promising results in PsA status conversion.
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Affiliation(s)
- Alexander Schnell
- Department of Pediatrics and Adolescent Medicine, University Hospital Erlangen, Friedrich-Alexander-University Erlangen-Nuremberg, Germany
- Corresponding author.
| | - Hannah Hober
- Department of Pediatrics and Adolescent Medicine, University Hospital Erlangen, Friedrich-Alexander-University Erlangen-Nuremberg, Germany
| | - Natalie Kaiser
- Department of Pediatrics and Adolescent Medicine, University Hospital Erlangen, Friedrich-Alexander-University Erlangen-Nuremberg, Germany
| | - Renate Ruppel
- Department of Pediatrics and Adolescent Medicine, University Hospital Erlangen, Friedrich-Alexander-University Erlangen-Nuremberg, Germany
| | - Annika Geppert
- First Department of Medicine, University Hospital Erlangen, Friedrich-Alexander-University Erlangen-Nuremberg, Germany
| | - Christina Tremel
- Department of Pediatrics and Adolescent Medicine, University Hospital Erlangen, Friedrich-Alexander-University Erlangen-Nuremberg, Germany
| | - Julia Sobel
- Department of Pediatrics and Adolescent Medicine, University Hospital Erlangen, Friedrich-Alexander-University Erlangen-Nuremberg, Germany
| | - Erika Plattner
- Department of Pediatrics and Adolescent Medicine, University Hospital Erlangen, Friedrich-Alexander-University Erlangen-Nuremberg, Germany
| | - Joachim Woelfle
- Department of Pediatrics and Adolescent Medicine, University Hospital Erlangen, Friedrich-Alexander-University Erlangen-Nuremberg, Germany
| | - André Hoerning
- Department of Pediatrics and Adolescent Medicine, University Hospital Erlangen, Friedrich-Alexander-University Erlangen-Nuremberg, Germany
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23
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Vo KTX, Yi Q, Jeon JS. Engineering effector-triggered immunity in rice: Obstacles and perspectives. Plant Cell Environ 2023; 46:1143-1156. [PMID: 36305486 DOI: 10.1111/pce.14477] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Revised: 10/20/2022] [Accepted: 10/24/2022] [Indexed: 06/16/2023]
Abstract
Improving rice immunity is one of the most effective approaches to reduce yield loss by biotic factors, with the aim of increasing rice production by 2050 amidst limited natural resources. Triggering a fast and strong immune response to pathogens, effector-triggered immunity (ETI) has intrigued scientists to intensively study and utilize the mechanisms for engineering highly resistant plants. The conservation of ETI components and mechanisms across species enables the use of ETI components to generate broad-spectrum resistance in plants. Numerous efforts have been made to introduce new resistance (R) genes, widen the effector recognition spectrum and generate on-demand R genes. Although engineering ETI across plant species is still associated with multiple challenges, previous attempts have provided an enhanced understanding of ETI mechanisms. Here, we provide a survey of recent reports in the engineering of rice R genes. In addition, we suggest a framework for future studies of R gene-effector interactions, including genome-scale investigations in both rice and pathogens, followed by structural studies of R proteins and effectors, and potential strategies to use important ETI components to improve rice immunity.
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Affiliation(s)
- Kieu Thi Xuan Vo
- Graduate School of Green-Bio Science, Kyung Hee University, Yongin, Korea
| | - Qi Yi
- Graduate School of Green-Bio Science, Kyung Hee University, Yongin, Korea
| | - Jong-Seong Jeon
- Graduate School of Green-Bio Science, Kyung Hee University, Yongin, Korea
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24
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Chen T, Xu G, Mou R, Greene GH, Liu L, Motley J, Dong X. Global translational induction during NLR-mediated immunity in plants is dynamically regulated by CDC123, an ATP-sensitive protein. Cell Host Microbe 2023; 31:334-342.e5. [PMID: 36801014 PMCID: PMC10898606 DOI: 10.1016/j.chom.2023.01.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Revised: 12/05/2022] [Accepted: 01/23/2023] [Indexed: 02/19/2023]
Abstract
The recognition of pathogen effectors by their cognate nucleotide-binding leucine-rich repeat (NLR) receptors activates effector-triggered immunity (ETI) in plants. ETI is associated with correlated transcriptional and translational reprogramming and subsequent death of infected cells. Whether ETI-associated translation is actively regulated or passively driven by transcriptional dynamics remains unknown. In a genetic screen using a translational reporter, we identified CDC123, an ATP-grasp protein, as a key activator of ETI-associated translation and defense. During ETI, an increase in ATP concentration facilitates CDC123-mediated assembly of the eukaryotic translation initiation factor 2 (eIF2) complex. Because ATP is required for the activation of NLRs as well as the CDC123 function, we uncovered a possible mechanism by which the defense translatome is coordinately induced during NLR-mediated immunity. The conservation of the CDC123-mediated eIF2 assembly suggests its possible role in NLR-mediated immunity beyond plants.
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Affiliation(s)
- Tianyuan Chen
- Howard Hughes Medical Institute, Department of Biology, Duke University, Durham, NC 27708, USA
| | - Guoyong Xu
- Howard Hughes Medical Institute, Department of Biology, Duke University, Durham, NC 27708, USA.
| | - Rui Mou
- Howard Hughes Medical Institute, Department of Biology, Duke University, Durham, NC 27708, USA
| | - George H Greene
- Howard Hughes Medical Institute, Department of Biology, Duke University, Durham, NC 27708, USA
| | - Lijing Liu
- Howard Hughes Medical Institute, Department of Biology, Duke University, Durham, NC 27708, USA
| | - Jonathan Motley
- Howard Hughes Medical Institute, Department of Biology, Duke University, Durham, NC 27708, USA
| | - Xinnian Dong
- Howard Hughes Medical Institute, Department of Biology, Duke University, Durham, NC 27708, USA.
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25
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Ørum MB, Rönsholt FF, Jeppesen M, Bendstrup E, Katzenstein TL, Ott P, Perch M, Pressler T, Qvist T, Jensen-Fangel S. Outcome of elexacaftor/tezacaftor/ivacaftor therapy in patients with cystic fibrosis and solid organ transplantation. Pediatr Pulmonol 2023; 58:602-605. [PMID: 36314653 DOI: 10.1002/ppul.26217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Revised: 09/16/2022] [Accepted: 10/22/2022] [Indexed: 11/06/2022]
Abstract
We report a case series of four patients with cystic fibrosis (CF) and previous solid organ transplantation (SOT) receiving elexacaftor/tezacaftor/ivacaftor therapy for 6 months or more. Data was collected retrospectively. The treatment was well tolerated and all patients reported subjective improvements.
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Affiliation(s)
- Matilde B Ørum
- Department of Infectious Diseases, Cystic Fibrosis Clinic, Aarhus University Hospital, Aarhus, Denmark
| | - Frederikke F Rönsholt
- Department of Cardiology, Section for Lung Transplantation, University Hospital Rigshospitalet Copenhagen, Kobenhavn, Denmark.,Department of Infectious Diseases, Cystic Fibrosis Clinic, University Hospital Rigshospitalet Copenhagen, Kobenhavn, Denmark
| | - Majbritt Jeppesen
- Department of Infectious Diseases, Cystic Fibrosis Clinic, Aarhus University Hospital, Aarhus, Denmark.,Institute of Clinical Medicine, Aarhus University, Aarhus, Denmark
| | - Elisabeth Bendstrup
- Institute of Clinical Medicine, Aarhus University, Aarhus, Denmark.,Department of Respiratory Diseases and Allergy, Center for Rare Lung Diseases, Aarhus University Hospital, Aarhus, Denmark
| | - Terese L Katzenstein
- Department of Infectious Diseases, Cystic Fibrosis Clinic, University Hospital Rigshospitalet Copenhagen, Kobenhavn, Denmark
| | - Peter Ott
- Institute of Clinical Medicine, Aarhus University, Aarhus, Denmark.,Department of Hepatology and Gastroenterology, Aarhus University Hospital, Aarhus, Denmark
| | - Michael Perch
- Department of Cardiology, Section for Lung Transplantation, University Hospital Rigshospitalet Copenhagen, Kobenhavn, Denmark.,Department Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
| | - Tacjana Pressler
- Department of Infectious Diseases, Cystic Fibrosis Clinic, University Hospital Rigshospitalet Copenhagen, Kobenhavn, Denmark
| | - Tavs Qvist
- Department of Infectious Diseases, Cystic Fibrosis Clinic, University Hospital Rigshospitalet Copenhagen, Kobenhavn, Denmark
| | - Søren Jensen-Fangel
- Department of Infectious Diseases, Cystic Fibrosis Clinic, Aarhus University Hospital, Aarhus, Denmark.,Institute of Clinical Medicine, Aarhus University, Aarhus, Denmark
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26
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Shi H, Liu Y, Ding A, Wang W, Sun Y. Induced defense strategies of plants against Ralstonia solanacearum. Front Microbiol 2023; 14:1059799. [PMID: 36778883 PMCID: PMC9910360 DOI: 10.3389/fmicb.2023.1059799] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2022] [Accepted: 01/05/2023] [Indexed: 01/27/2023] Open
Abstract
Plants respond to Ralstonia solanacearum infestation through two layers of immune system (PTI and ETI). This process involves the production of plant-induced resistance. Strategies for inducing resistance in plants include the formation of tyloses, gels, and callose and changes in the content of cell wall components such as cellulose, hemicellulose, pectin, lignin, and suberin in response to pathogen infestation. When R. solanacearum secrete cell wall degrading enzymes, plants also sense the status of cell wall fragments through the cell wall integrity (CWI) system, which activates deep-seated defense responses. In addition, plants also fight against R. solanacearum infestation by regulating the distribution of metabolic networks to increase the production of resistant metabolites and reduce the production of metabolites that are easily exploited by R. solanacearum. We review the strategies used by plants to induce resistance in response to R. solanacearum infestation. In particular, we highlight the importance of plant-induced physical and chemical defenses as well as cell wall defenses in the fight against R. solanacearum.
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Affiliation(s)
- Haoqi Shi
- Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao, Shandong, China,The Graduate School, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Yong Liu
- Tobacco Breeding and Biotechnology Research Center, Yunnan Academy of Tobacco Agricultural Sciences, Kunming, China,*Correspondence: Yong Liu, ; Anming Ding, ; Weifeng Wang,
| | - Anming Ding
- Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao, Shandong, China,*Correspondence: Yong Liu, ; Anming Ding, ; Weifeng Wang,
| | - Weifeng Wang
- Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao, Shandong, China,*Correspondence: Yong Liu, ; Anming Ding, ; Weifeng Wang,
| | - Yuhe Sun
- Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao, Shandong, China
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27
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Wu N, Ozketen AC, Cheng Y, Jiang W, Zhou X, Zhao X, Guan Y, Xiang Z, Akkaya MS. Puccinia striiformis f. sp. tritici effectors in wheat immune responses. Front Plant Sci 2022; 13:1012216. [PMID: 36420019 PMCID: PMC9677129 DOI: 10.3389/fpls.2022.1012216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Accepted: 10/10/2022] [Indexed: 06/16/2023]
Abstract
The obligate biotrophic fungus Puccinia striiformis f. sp. tritici, which causes yellow (stripe) rust disease, is among the leading biological agents resulting in tremendous yield losses on global wheat productions per annum. The combatting strategies include, but are not limited to, fungicide applications and the development of resistant cultivars. However, evolutionary pressure drives rapid changes, especially in its "effectorome" repertoire, thus allowing pathogens to evade and breach resistance. The extracellular and intracellular effectors, predominantly secreted proteins, are tactical arsenals aiming for many defense processes of plants. Hence, the identity of the effectors and the molecular mechanisms of the interactions between the effectors and the plant immune system have long been targeted in research. The obligate biotrophic nature of P. striiformis f. sp. tritici and the challenging nature of its host, the wheat, impede research on this topic. Next-generation sequencing and novel prediction algorithms in bioinformatics, which are accompanied by in vitro and in vivo validation approaches, offer a speedy pace for the discovery of new effectors and investigations of their biological functions. Here, we briefly review recent findings exploring the roles of P. striiformis f. sp. tritici effectors together with their cellular/subcellular localizations, host responses, and interactors. The current status and the challenges will be discussed. We hope that the overall work will provide a broader view of where we stand and a reference point to compare and evaluate new findings.
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Affiliation(s)
- Nan Wu
- School of Bioengineering, Dalian University of Technology, Dalian, China
| | | | - Yu Cheng
- School of Bioengineering, Dalian University of Technology, Dalian, China
| | - Wanqing Jiang
- School of Bioengineering, Dalian University of Technology, Dalian, China
| | - Xuan Zhou
- School of Bioengineering, Dalian University of Technology, Dalian, China
| | - Xinran Zhao
- School of Bioengineering, Dalian University of Technology, Dalian, China
| | - Yaorong Guan
- School of Bioengineering, Dalian University of Technology, Dalian, China
| | - Zhaoxia Xiang
- School of Bioengineering, Dalian University of Technology, Dalian, China
| | - Mahinur S. Akkaya
- School of Bioengineering, Dalian University of Technology, Dalian, China
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Abstract
There is an array of pathogenic fungi in the natural environment of plants, which produce some molecules including pathogen-associated molecular patterns (PAMPs) and effectors during infection. These molecules, which can be recognized by plant specific receptors to activate plant immunity, including PTI (PAMP-triggered immunity) and ETI (effector-triggered immunity), are called elicitors. Undoubtedly, identification of novel fungal elicitors and their plant receptors and comprehensive understanding about fungal elicitor-triggered plant immunity will be of great significance to effectively control plant diseases. Great progress has occurred in fungal elicitor-triggered plant immunity, especially in the signaling pathways of PTI and ETI, in recent years. Here, recent advances in fungal elicitor-triggered plant immunity are summarized and their important contribution to the enlightenment of plant disease control is also discussed.
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29
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Bernoux M, Zetzsche H, Stuttmann J. Connecting the dots between cell surface- and intracellular-triggered immune pathways in plants. Curr Opin Plant Biol 2022; 69:102276. [PMID: 36001920 DOI: 10.1016/j.pbi.2022.102276] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Revised: 06/16/2022] [Accepted: 07/06/2022] [Indexed: 06/15/2023]
Abstract
Plants can detect microbial molecules via surface-localized pattern-recognition receptors (PRRs) and intracellular immune receptors from the nucleotide-binding, leucine-rich repeat receptor (NLR) family. The corresponding pattern-triggered (PTI) and effector-triggered (ETI) immunity were long considered separate pathways, although they converge on largely similar cellular responses, such as calcium influx and overlapping gene reprogramming. A number of studies recently uncovered genetic and molecular interconnections between PTI and ETI, highlighting the complexity of the plant immune network. Notably, PRR- and NLR-mediated immune responses require and potentiate each other to reach an optimal immune output. How PTI and ETI connect to confer robust immunity in different plant species, including crops will be an exciting future research area.
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Affiliation(s)
- Maud Bernoux
- Laboratoire des Interactions Plantes-Microbes-Environnement (LIPME), INRAE, CNRS, Université de Toulouse, F-31326 Castanet-Tolosan, France
| | - Holger Zetzsche
- Institute for Resistance Research and Stress Tolerance, Federal Research Centre for Cultivated Plants, Julius Kühn-Institute (JKI), Quedlinburg, Germany
| | - Johannes Stuttmann
- Institute for Biosafety in Plant Biotechnology, Federal Research Centre for Cultivated Plants, Julius Kühn-Institute (JKI), Quedlinburg, Germany.
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30
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Sobol G, Chakraborty J, Martin GB, Sessa G. The Emerging Role of PP2C Phosphatases in Tomato Immunity. Mol Plant Microbe Interact 2022; 35:737-747. [PMID: 35696659 DOI: 10.1094/mpmi-02-22-0037-cr] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The antagonistic effect of plant immunity on growth likely drove evolution of molecular mechanisms that prevent accidental initiation and prolonged activation of plant immune responses. Signaling networks of pattern-triggered and effector-triggered immunity, the two main layers of plant immunity, are tightly regulated by the activity of protein phosphatases that dephosphorylate their protein substrates and reverse the action of protein kinases. Members of the PP2C class of protein phosphatases have emerged as key negative regulators of plant immunity, primarily from research in the model plant Arabidopsis thaliana, revealing the potential to employ PP2C proteins to enhance plant disease resistance. As a first step towards focusing on the PP2C family for both basic and translational research, we analyzed the tomato genome sequence to ascertain the complement of the tomato PP2C family, identify conserved protein domains and signals in PP2C amino acid sequences, and examine domain combinations in individual proteins. We then identified tomato PP2Cs that are candidate regulators of single or multiple layers of the immune signaling network by in-depth analysis of publicly available RNA-seq datasets. These included expression profiles of plants treated with fungal or bacterial pathogen-associated molecular patterns, with pathogenic, nonpathogenic, and disarmed bacteria, as well as pathogenic fungi and oomycetes. Finally, we discuss the possible use of immunity-associated PP2Cs to better understand the signaling networks of plant immunity and to engineer durable and broad disease resistance in crop plants. [Formula: see text] Copyright © 2022 The Author(s). This is an open access article distributed under the CC BY-NC-ND 4.0 International license.
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Affiliation(s)
- Guy Sobol
- School of Plant Sciences and Food Security, The George S. Wise Faculty of Life Sciences, Tel-Aviv University, 69978 Tel-Aviv, Israel
| | - Joydeep Chakraborty
- School of Plant Sciences and Food Security, The George S. Wise Faculty of Life Sciences, Tel-Aviv University, 69978 Tel-Aviv, Israel
| | - Gregory B Martin
- Boyce Thompson Institute for Plant Research, Ithaca, NY 14853, U.S.A
- Plant Pathology and Plant-Microbe Biology Section, School of Integrative Plant Science, Cornell University, Ithaca, NY 14853, U.S.A
| | - Guido Sessa
- School of Plant Sciences and Food Security, The George S. Wise Faculty of Life Sciences, Tel-Aviv University, 69978 Tel-Aviv, Israel
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31
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Sertsuvalkul N, DeMell A, Dinesh-Kumar SP. The complex roles of autophagy in plant immunity. FEBS Lett 2022; 596:2163-2171. [PMID: 35460270 PMCID: PMC9474723 DOI: 10.1002/1873-3468.14356] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Revised: 04/10/2022] [Accepted: 04/11/2022] [Indexed: 12/28/2022]
Abstract
Plant immunity is the result of multiple distinct cellular processes cooperating with each other to generate immune responses. Autophagy is a conserved cellular recycling process and has well-established roles in nutrient starvation responses and cellular homeostasis. Recently, the role of autophagy in immunity has become increasingly evident. However, our knowledge about plant autophagy remains limited, and how this fundamental cellular process is involved in plant immunity is still somewhat perplexing. Here, we summarize the current understanding of the positive and negative roles of autophagy in plant immunity and how different microbes exploit this process to their own advantage. The dualistic role of autophagy in plant immunity emphasizes that much remains to be explored in this area.
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Affiliation(s)
- Nyd Sertsuvalkul
- Department of Plant Biology, College of Biological Sciences, University of California, Davis, CA 95616, USA
- The Genome Center, College of Biological Sciences, University of California, Davis, CA 95616, USA
| | - April DeMell
- Department of Plant Biology, College of Biological Sciences, University of California, Davis, CA 95616, USA
- The Genome Center, College of Biological Sciences, University of California, Davis, CA 95616, USA
| | - Savithramma P. Dinesh-Kumar
- Department of Plant Biology, College of Biological Sciences, University of California, Davis, CA 95616, USA
- The Genome Center, College of Biological Sciences, University of California, Davis, CA 95616, USA
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Zhang Q, Chen S, Bao Y, Wang D, Wang W, Chen R, Li Y, Xu G, Feng X, Liang X, Dou D. Functional Diversification Analysis of Soybean Malectin/Malectin-Like Domain-Containing Receptor-Like Kinases in Immunity by Transient Expression Assays. Front Plant Sci 2022; 13:938876. [PMID: 35812924 PMCID: PMC9260666 DOI: 10.3389/fpls.2022.938876] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/08/2022] [Accepted: 06/06/2022] [Indexed: 06/15/2023]
Abstract
Plants have responded to microbial pathogens by evolving a two-tiered immune system, involving pathogen-associated molecular pattern (PAMP)-triggered immunity (PTI) and effector-triggered immunity (ETI). Malectin/malectin-like domain-containing receptor-like kinases (MRLKs) have been reported to participate in many biological functions in plant including immunity and resistance. However, little is known regarding the role of MRLKs in soybean immunity. This is a crucial question to address because soybean is an important source of oil and plant proteins, and its production is threatened by various pathogens. Here, we systematically identified 72 Glycine max MRLKs (GmMRLKs) and demonstrated that many of them are transcriptionally induced or suppressed in response to infection with microbial pathogens. Next, we successfully cloned 60 GmMRLKs and subsequently characterized their roles in plant immunity by transiently expressing them in Nicotiana benthamiana, a model plant widely used to study host-pathogen interactions. Specifically, we examined the effect of GmMRLKs on PTI responses and noticed that a number of GmMRLKs negatively regulated the reactive oxygen species burst induced by flg22 and chitin, and cell death triggered by XEG1 and INF1. We also analyzed the microbial effectors AvrB- and XopQ-induced hypersensitivity response and identified several GmMRLKs that suppressed ETI activation. We further showed that GmMRLKs regulate immunity probably by coupling to the immune receptor complexes. Furthermore, transient expression of several selected GmMRLKs in soybean hairy roots conferred reduced resistance to soybean pathogen Phytophthora sojae. In summary, we revealed the common and specific roles of GmMRLKs in soybean immunity and identified a number of GmMRLKs as candidate susceptible genes that may be useful for improving soybean resistance.
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Affiliation(s)
- Qian Zhang
- MOA Key Lab of Pest Monitoring and Green Management, Department of Plant Pathology, College of Plant Protection, China Agricultural University, Beijing, China
| | - Shuxian Chen
- MOA Key Lab of Pest Monitoring and Green Management, Department of Plant Pathology, College of Plant Protection, China Agricultural University, Beijing, China
| | - Yazhou Bao
- MOA Key Lab of Pest Monitoring and Green Management, Department of Plant Pathology, College of Plant Protection, China Agricultural University, Beijing, China
| | - Dongmei Wang
- Key Laboratory of Soybean Molecular Design Breeding, Northeast Institute of Geography and Agroecology, Innovative Academy of Seed Design, Chinese Academy of Sciences, Changchun, China
| | - Weijie Wang
- MOA Key Lab of Pest Monitoring and Green Management, Department of Plant Pathology, College of Plant Protection, China Agricultural University, Beijing, China
| | - Rubin Chen
- MOA Key Lab of Pest Monitoring and Green Management, Department of Plant Pathology, College of Plant Protection, China Agricultural University, Beijing, China
| | - Yixin Li
- MOA Key Lab of Pest Monitoring and Green Management, Department of Plant Pathology, College of Plant Protection, China Agricultural University, Beijing, China
| | - Guangyuan Xu
- MOA Key Lab of Pest Monitoring and Green Management, Department of Plant Pathology, College of Plant Protection, China Agricultural University, Beijing, China
| | - Xianzhong Feng
- Key Laboratory of Soybean Molecular Design Breeding, Northeast Institute of Geography and Agroecology, Innovative Academy of Seed Design, Chinese Academy of Sciences, Changchun, China
| | - Xiangxiu Liang
- MOA Key Lab of Pest Monitoring and Green Management, Department of Plant Pathology, College of Plant Protection, China Agricultural University, Beijing, China
- College of Life Sciences, South China Agricultural University, Guangzhou, China
| | - Daolong Dou
- MOA Key Lab of Pest Monitoring and Green Management, Department of Plant Pathology, College of Plant Protection, China Agricultural University, Beijing, China
- College of Plant Protection, Nanjing Agricultural University, Nanjing, China
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Dongus JA, Bhandari DD, Penner E, Lapin D, Stolze SC, Harzen A, Patel M, Archer L, Dijkgraaf L, Shah J, Nakagami H, Parker JE. Cavity surface residues of PAD4 and SAG101 contribute to EDS1 dimer signaling specificity in plant immunity. Plant J 2022; 110:1415-1432. [PMID: 35324052 DOI: 10.1111/tpj.15747] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Revised: 03/09/2022] [Accepted: 03/17/2022] [Indexed: 06/14/2023]
Abstract
Arabidopsis pathogen effector-triggered immunity (ETI) is controlled by a family of three lipase-like proteins (EDS1, PAD4, and SAG101) and two subfamilies of HET-S/LOB-B (HeLo)-domain "helper" nucleotide-binding/leucine-rich repeats (ADR1s and NRG1s). EDS1-PAD4 dimers cooperate with ADR1s, and EDS1-SAG101 dimers with NRG1s, in two separate defense-promoting modules. EDS1-PAD4-ADR1 and EDS1-SAG101-NRG1 complexes were detected in immune-activated leaf extracts but the molecular determinants for specific complex formation and function remain unknown. EDS1 signaling is mediated by a C-terminal EP domain (EPD) surface surrounding a cavity formed by the heterodimer. Here we investigated whether the EPDs of PAD4 and SAG101 contribute to EDS1 dimer functions. Using a structure-guided approach, we undertook a comprehensive mutational analysis of Arabidopsis PAD4. We identify two conserved residues (Arg314 and Lys380) lining the PAD4 EPD cavity that are essential for EDS1-PAD4-mediated pathogen resistance, but are dispensable for the PAD4-mediated restriction of green peach aphid infestation. Positionally equivalent Met304 and Arg373 at the SAG101 EPD cavity are required for EDS1-SAG101 promotion of ETI-related cell death. In a PAD4 and SAG101 interactome analysis of ETI-activated tissues, PAD4R314A and SAG101M304R EPD variants maintain interaction with EDS1 but lose association, respectively, with helper nucleotide-binding/leucine-rich repeats ADR1-L1 and NRG1.1, and other immune-related proteins. Our data reveal a fundamental contribution of similar but non-identical PAD4 and SAG101 EPD surfaces to specific EDS1 dimer protein interactions and pathogen immunity.
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Affiliation(s)
- Joram A Dongus
- Department of Plant-Microbe Interactions, Max Planck Institute for Plant Breeding Research, Carl-von-Linné-Weg 10, 50829, Cologne, Germany
- Laboratory of Plant Physiology, Wageningen University, Droevendaalsesteeg 1, 6700, AA Wageningen, The Netherlands
| | - Deepak D Bhandari
- Department of Plant-Microbe Interactions, Max Planck Institute for Plant Breeding Research, Carl-von-Linné-Weg 10, 50829, Cologne, Germany
- Plant Research Laboratory, Michigan State University, 612, Wilson Road, East Lansing, Michigan, 48824, USA
| | - Eva Penner
- Department of Plant-Microbe Interactions, Max Planck Institute for Plant Breeding Research, Carl-von-Linné-Weg 10, 50829, Cologne, Germany
| | - Dmitry Lapin
- Department of Plant-Microbe Interactions, Max Planck Institute for Plant Breeding Research, Carl-von-Linné-Weg 10, 50829, Cologne, Germany
- Plant-Microbe Interactions, Utrecht University, Padualaan 8, 3584, CH Utrecht, The Netherlands
| | - Sara C Stolze
- Protein Mass Spectrometry, Max Planck Institute for Plant Breeding Research, Carl-von-Linné-Weg 10, 50829, Cologne, Germany
| | - Anne Harzen
- Protein Mass Spectrometry, Max Planck Institute for Plant Breeding Research, Carl-von-Linné-Weg 10, 50829, Cologne, Germany
| | - Monika Patel
- Department of Biological Sciences and BioDiscovery Institute, University of North Texas, 1511 West Sycamore, Denton, 76201, Texas, USA
| | - Lani Archer
- Department of Biological Sciences and BioDiscovery Institute, University of North Texas, 1511 West Sycamore, Denton, 76201, Texas, USA
| | - Lucas Dijkgraaf
- Department of Plant-Microbe Interactions, Max Planck Institute for Plant Breeding Research, Carl-von-Linné-Weg 10, 50829, Cologne, Germany
- Plant-Microbe Interactions, Utrecht University, Padualaan 8, 3584, CH Utrecht, The Netherlands
| | - Jyoti Shah
- Department of Biological Sciences and BioDiscovery Institute, University of North Texas, 1511 West Sycamore, Denton, 76201, Texas, USA
| | - Hirofumi Nakagami
- Protein Mass Spectrometry, Max Planck Institute for Plant Breeding Research, Carl-von-Linné-Weg 10, 50829, Cologne, Germany
| | - Jane E Parker
- Department of Plant-Microbe Interactions, Max Planck Institute for Plant Breeding Research, Carl-von-Linné-Weg 10, 50829, Cologne, Germany
- Cologne-Düsseldorf Cluster of Excellence on Plant Sciences (CEPLAS), 40225, Düsseldorf, Germany
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Abstract
Calcium ions function as a key second messenger ion in eukaryotes. Spatially and temporally defined cytoplasmic Ca2+ signals are shaped through the concerted activity of ion channels, exchangers, and pumps in response to diverse stimuli; these signals are then decoded through the activity of Ca2+ -binding sensor proteins. In plants, Ca2+ signaling is central to both pattern- and effector-triggered immunity, with the generation of characteristic cytoplasmic Ca2+ elevations in response to potential pathogens being common to both. However, despite their importance, and a long history of scientific interest, the transport proteins that shape Ca2+ signals and their integration remain poorly characterized. Here, we discuss recent work that has both shed light on and deepened the mysteries of Ca2+ signaling in plant immunity.
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Affiliation(s)
- Philipp Köster
- Institute of Plant and Microbial Biology and Zürich-Basel Plant Science Center, University of Zürich, Zürich, Switzerland
| | - Thomas A DeFalco
- Institute of Plant and Microbial Biology and Zürich-Basel Plant Science Center, University of Zürich, Zürich, Switzerland
| | - Cyril Zipfel
- Institute of Plant and Microbial Biology and Zürich-Basel Plant Science Center, University of Zürich, Zürich, Switzerland.,The Sainsbury Laboratory, University of East Anglia, Norwich, UK
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Maissan I, van Lieshout E, de Jong T, van Vledder M, Houmes RJ, Hartog DD, Stolker RJ. The impact of video laryngoscopy on the first-pass success rate of prehospital endotracheal intubation in The Netherlands: a retrospective observational study. Eur J Trauma Emerg Surg 2022; 48:4205-4213. [PMID: 35362731 PMCID: PMC9532291 DOI: 10.1007/s00068-022-01962-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Accepted: 03/15/2022] [Indexed: 12/01/2022]
Abstract
Purpose The first-pass success rate for endotracheal intubation (ETI) depends on provider experience and exposure. We hypothesize that video laryngoscopy (VL) improves first-pass and overall ETI success rates in low and intermediate experienced airway providers and prevents from unrecognized oesophageal intubations in prehospital settings. Methods In this study 3632 patients were included. In all cases, an ambulance nurse, HEMS nurse, or HEMS physician performed prehospital ETI using direct Laryngoscopy (DL) or VL. Results First-pass ETI success rates for ambulance nurses with DL were 45.5% (391/859) and with VL 64.8% (125/193). For HEMS nurses first-pass success rates were 57.6% (34/59) and 77.2% (125/162) respectively. For HEMS physicians these successes were 85.9% (790/920) and 86.9% (1251/1439). The overall success rate for ambulance nurses with DL was 58.4% (502/859) and 77.2% (149/193) with VL. HEMS nurses successes were 72.9% (43/59) and 87.0% (141/162), respectively. HEMS physician successes were 98.7% (908/920) and 99.0% (1425/1439), respectively. The incidence of unrecognized intubations in the oesophagus before HEMS arrival in traumatic circulatory arrest (TCA) was 30.6% with DL and 37.5% with VL. In medical cardiac arrest cases the incidence was 20% with DL and 0% with VL. Conclusion First-pass and overall ETI success rates for ambulance and HEMS nurses are better with VL. The used device does not affect success rates of HEMS physicians. VL resulted in less unrecognized oesophageal intubations in medical cardiac arrests. In TCA cases VL resulted in more oesophageal intubations when performed by ambulance nurses before HEMS arrival.
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Affiliation(s)
- Iscander Maissan
- Department of Anesthesiology, Erasmus University Medical Center Rotterdam, Rotterdam, The Netherlands.
| | - Esther van Lieshout
- Trauma Research Unit, Department of Surgery, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands
| | - Timo de Jong
- Department of Anesthesiology, Erasmus University Medical Center Rotterdam, Rotterdam, The Netherlands
| | - Mark van Vledder
- Trauma Research Unit, Department of Surgery, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands
| | - Robert Jan Houmes
- Department of Anesthesiology, Erasmus University Medical Center Rotterdam, Rotterdam, The Netherlands
| | - Dennis den Hartog
- Trauma Research Unit, Department of Surgery, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands
| | - Robert Jan Stolker
- Department of Anesthesiology, Erasmus University Medical Center Rotterdam, Rotterdam, The Netherlands
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Abstract
Plant innate immunity begins with the recognition of pathogens by plasma membrane localized pattern-recognition receptors (PRRs) and intracellular nucleotide-binding domain leucine-rich repeat containing receptors (NLRs), which lead to pattern-triggered immunity (PTI) and effector-triggered immunity (ETI), respectively. For a long time, PTI and ETI have been regarded as two independent processes although they share multiple components and signal outputs. Increasing evidence shows an intimate link between PTI and ETI. PTI and ETI mutually potentiate each other, and this is essential for robust disease resistance during pathogen infection. An ancient class of NLRs called RNLs, so named because they carry a Resistance to Powdery Mildew 8 (RPW8)-like coiled-coil (CC) domain in the N terminus, has emerged as a key node connecting PTI and ETI. RNLs not only act as helper NLRs that signal downstream of sensor NLRs, they also directly mediate PTI signaling by associating with PRR complexes. Here, we focus on Activated Disease Resistance 1 (ADR1), a subclass of RNLs, and discuss its role and mechanism in plant immunity.
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Affiliation(s)
- Meijuan Hu
- State Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing, 100101 China
| | - Jian-Min Zhou
- State Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing, 100101 China
- CAS Center for Excellence in Biotic Interactions, University of Chinese Academy of Sciences, Beijing, 100049 China
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37
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Abstract
The first of three International Society for Molecular Plant-Microbe Interactions (IS-MPMI) eSymposia was convened on 12 and 13 July 2021, with the theme "Molecular Mechanism & Structure-Zooming in on Plant Immunity". Hosted by Jian-Min Zhou (Beijing, China) and Jane Parker (Cologne, Germany), the eSymposium centered on "Top 10 Unanswered Questions in MPMI" number five: Does effector-triggered immunity (ETI) potentiate and restore pattern-triggered immunity (PTI)-or is there really a binary distinction between ETI and PTI? Since the previous International Congress of IS-MPMI in 2019, substantial progress has been made in untangling the complex signaling underlying plant immunity, including a greater understanding of the structure and function of key proteins. A clear need emerged for the MPMI community to come together virtually to share new knowledge around plant immunity. Over the course of two synchronous, half days of programming, participants from 32 countries attended two plenary sessions with engaging panel discussions and networked through interactive hours and poster breakout rooms. In this report, we summarize the concerted effort by multiple laboratories to study the molecular mechanisms underlying ETI and PTI, highlighting the essential role of plant resistosomes in the formation of calcium channels during an immune response. We conclude our report by forming new questions about how overlapping signaling mechanisms are controlled.[Formula: see text] Copyright © 2021 The Author(s). This is an open access article distributed under the CC BY-NC-ND 4.0 International license.
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Affiliation(s)
- Alexandra Margets
- Indiana University, Department of Biology, Bloomington, IN 47405, U.S.A
| | - Sharmin Rima
- Research School of Biology, The Australian National University, Canberra, Australia
| | - Matthew Helm
- United States Department of Agriculture-Agricultural Research Service, Crop Production and Pest Control Research Unit, West Lafayette, IN 47907, U.S.A
| | - Morgan Carter
- School of Plant Sciences, University of Arizona, Tucson, AZ 85721, U.S.A
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38
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Abstract
Chloroplasts are key players in plant immune signaling, contributing to not only de novo synthesis of defensive phytohormones but also the generation of reactive oxygen and nitrogen species following activation of pattern recognition receptors or resistance (R) proteins. The local hypersensitive response (HR) elicited by R proteins is underpinned by chloroplast-generated reactive oxygen species. HR-induced lipid peroxidation generates important chloroplast-derived signaling lipids essential to the establishment of systemic immunity. As a consequence of this pivotal role in immunity, pathogens deploy effector complements that directly or indirectly target chloroplasts to attenuate chloroplast immunity (CI). Our review summarizes the current knowledge of CI signaling and highlights common pathogen chloroplast targets and virulence strategies. We address emerging insights into chloroplast retrograde signaling in immune responses and gaps in our knowledge, including the importance of understanding chloroplast heterogeneity and chloroplast involvement in intraorganellular interactions in host immunity.
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Affiliation(s)
- Pradeep Kachroo
- Department of Plant Pathology, University of Kentucky, Lexington, Kentucky 40546, USA
| | - Tessa M Burch-Smith
- Department of Biochemistry & Cellular and Molecular Biology, University of Tennessee, Knoxville, Tennessee 37996, USA
| | - Murray Grant
- School of Life Sciences, University of Warwick, Coventry, CV4 7AL, UK;
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39
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Kumar J, Ramlal A, Kumar K, Rani A, Mishra V. Signaling Pathways and Downstream Effectors of Host Innate Immunity in Plants. Int J Mol Sci 2021; 22:ijms22169022. [PMID: 34445728 PMCID: PMC8396522 DOI: 10.3390/ijms22169022] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Revised: 08/16/2021] [Accepted: 08/18/2021] [Indexed: 12/15/2022] Open
Abstract
Phytopathogens, such as biotrophs, hemibiotrophs and necrotrophs, pose serious stress on the development of their host plants, compromising their yields. Plants are in constant interaction with such phytopathogens and hence are vulnerable to their attack. In order to counter these attacks, plants need to develop immunity against them. Consequently, plants have developed strategies of recognizing and countering pathogenesis through pattern-triggered immunity (PTI) and effector-triggered immunity (ETI). Pathogen perception and surveillance is mediated through receptor proteins that trigger signal transduction, initiated in the cytoplasm or at the plasma membrane (PM) surfaces. Plant hosts possess microbe-associated molecular patterns (P/MAMPs), which trigger a complex set of mechanisms through the pattern recognition receptors (PRRs) and resistance (R) genes. These interactions lead to the stimulation of cytoplasmic kinases by many phosphorylating proteins that may also be transcription factors. Furthermore, phytohormones, such as salicylic acid, jasmonic acid and ethylene, are also effective in triggering defense responses. Closure of stomata, limiting the transfer of nutrients through apoplast and symplastic movements, production of antimicrobial compounds, programmed cell death (PCD) are some of the primary defense-related mechanisms. The current article highlights the molecular processes involved in plant innate immunity (PII) and discusses the most recent and plausible scientific interventions that could be useful in augmenting PII.
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Affiliation(s)
- Jitendra Kumar
- Bangalore Bioinnovation Centre, Life Sciences Park, Electronics City Phase 1, Bengaluru 560100, India;
| | - Ayyagari Ramlal
- Division of Genetics, Indian Agricultural Research Institute (IARI), Pusa Campus, New Delhi 110012, India;
| | - Kamal Kumar
- School of Life Sciences, Jawaharlal Nehru University, New Delhi 110066, India;
| | - Anita Rani
- Department of Botany, Dyal Singh College, University of Delhi, Delhi 110003, India;
| | - Vachaspati Mishra
- Department of Botany, Dyal Singh College, University of Delhi, Delhi 110003, India;
- Correspondence:
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40
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Dongus JA, Parker JE. EDS1 signalling: At the nexus of intracellular and surface receptor immunity. Curr Opin Plant Biol 2021; 62:102039. [PMID: 33930849 DOI: 10.1016/j.pbi.2021.102039] [Citation(s) in RCA: 64] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Revised: 03/08/2021] [Accepted: 03/09/2021] [Indexed: 05/27/2023]
Abstract
The conserved lipase-like protein EDS1 transduces signals from pathogen-activated intracellular nucleotide-binding leucine-rich repeat (NLR) receptors to transcriptional defences and host cell death. In this pivotal NLR signalling role, EDS1 works as a heterodimer with each of its partners, SAG101 and PAD4. Different properties of EDS1-SAG101 and EDS1-PAD4 complexes and functional relationships to sensor and helper NLRs have emerged. EDS1-SAG101 dimers confer effector-triggered immunity mediated by intracellular TNL receptors. In contrast, EDS1-PAD4 dimers have a broader role promoting basal immune responses that can be initiated inside cells by TNL- or CNL-type NLRs, and at the cell surface by LRR-receptor proteins. Characterizing the essential elements of these two EDS1 modules will help to connect intracellular and surface receptor signalling networks in the plant immune system.
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Affiliation(s)
- Joram A Dongus
- Department of Plant-Microbe Interactions, Max-Planck Institute for Plant Breeding Research, Carl-von-Linné-Weg 10, Cologne, 50829, Germany
| | - Jane E Parker
- Cologne-Düsseldorf Cluster of Excellence on Plant Sciences (CEPLAS), 40225, Düsseldorf, Germany; Department of Plant-Microbe Interactions, Max-Planck Institute for Plant Breeding Research, Carl-von-Linné-Weg 10, Cologne, 50829, Germany.
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Ferreira MA, Teixeira RM, Fontes EPB. Geminivirus-Host Interactions: Action and Reaction in Receptor-Mediated Antiviral Immunity. Viruses 2021; 13:840. [PMID: 34066372 DOI: 10.3390/v13050840] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Revised: 05/01/2021] [Accepted: 05/04/2021] [Indexed: 01/09/2023] Open
Abstract
In plant−virus interactions, the plant immune system and virulence strategies are under constant pressure for dominance, and the balance of these opposing selection pressures can result in disease or resistance. The naturally evolving plant antiviral immune defense consists of a multilayered perception system represented by pattern recognition receptors (PRR) and resistance (R) proteins similarly to the nonviral pathogen innate defenses. Another layer of antiviral immunity, signaling via a cell surface receptor-like kinase to inhibit host and viral mRNA translation, has been identified as a virulence target of the geminivirus nuclear shuttle protein. The Geminiviridae family comprises broad-host range viruses that cause devastating plant diseases in a large variety of relevant crops and vegetables and hence have evolved a repertoire of immune-suppressing functions. In this review, we discuss the primary layers of the receptor-mediated antiviral immune system, focusing on the mechanisms developed by geminiviruses to overcome plant immunity.
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42
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Nguyen QM, Iswanto ABB, Son GH, Kim SH. Recent Advances in Effector-Triggered Immunity in Plants: New Pieces in the Puzzle Create a Different Paradigm. Int J Mol Sci 2021; 22:4709. [PMID: 33946790 PMCID: PMC8124997 DOI: 10.3390/ijms22094709] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Revised: 04/22/2021] [Accepted: 04/27/2021] [Indexed: 12/11/2022] Open
Abstract
Plants rely on multiple immune systems to protect themselves from pathogens. When pattern-triggered immunity (PTI)-the first layer of the immune response-is no longer effective as a result of pathogenic effectors, effector-triggered immunity (ETI) often provides resistance. In ETI, host plants directly or indirectly perceive pathogen effectors via resistance proteins and launch a more robust and rapid defense response. Resistance proteins are typically found in the form of nucleotide-binding and leucine-rich-repeat-containing receptors (NLRs). Upon effector recognition, an NLR undergoes structural change and associates with other NLRs. The dimerization or oligomerization of NLRs signals to downstream components, activates "helper" NLRs, and culminates in the ETI response. Originally, PTI was thought to contribute little to ETI. However, most recent studies revealed crosstalk and cooperation between ETI and PTI. Here, we summarize recent advancements in our understanding of the ETI response and its components, as well as how these components cooperate in the innate immune signaling pathways. Based on up-to-date accumulated knowledge, this review provides our current perspective of potential engineering strategies for crop protection.
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Affiliation(s)
- Quang-Minh Nguyen
- Division of Applied Life Science (BK21 Four Program), Plant Molecular Biology and Biotechnology Research Center, Gyeongsang National University, 501 Jinju-daero, Jinju 52828, Korea; (Q.-M.N.); (A.B.B.I.); (G.H.S.)
| | - Arya Bagus Boedi Iswanto
- Division of Applied Life Science (BK21 Four Program), Plant Molecular Biology and Biotechnology Research Center, Gyeongsang National University, 501 Jinju-daero, Jinju 52828, Korea; (Q.-M.N.); (A.B.B.I.); (G.H.S.)
| | - Geon Hui Son
- Division of Applied Life Science (BK21 Four Program), Plant Molecular Biology and Biotechnology Research Center, Gyeongsang National University, 501 Jinju-daero, Jinju 52828, Korea; (Q.-M.N.); (A.B.B.I.); (G.H.S.)
| | - Sang Hee Kim
- Division of Applied Life Science (BK21 Four Program), Plant Molecular Biology and Biotechnology Research Center, Gyeongsang National University, 501 Jinju-daero, Jinju 52828, Korea; (Q.-M.N.); (A.B.B.I.); (G.H.S.)
- Division of Life Science, Gyeongsang National University, 501 Jinju-daero, Jinju 52828, Korea
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43
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Chen Y, Zhong G, Cai H, Chen R, Liu N, Wang W, Tang D. A Truncated TIR-NBS Protein TN10 Pairs with Two Clustered TIR-NBS-LRR Immune Receptors and Contributes to Plant Immunity in Arabidopsis. Int J Mol Sci 2021; 22:4004. [PMID: 33924478 PMCID: PMC8069298 DOI: 10.3390/ijms22084004] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Revised: 04/10/2021] [Accepted: 04/10/2021] [Indexed: 01/09/2023] Open
Abstract
The encoding genes of plant intracellular nucleotide-binding site (NBS) and leucine-rich repeat (LRR) domain receptors (NLRs) often exist in the form of a gene cluster. Several recent studies demonstrated that the truncated Toll/interleukin-1 receptor-NBS (TIR-NBS) proteins play important roles in immunity. In this study, we identified a large TN gene cluster on Arabidopsis ecotype Col-0 chromosome 1, which included nine TN genes, TN4 to TN12. Interestingly, this cluster also contained two typical TIR-NBS-LRR genes: At1g72840 and At1g72860 (hereinafter referred to as TNL40 and TNL60, respectively), which formed head-to-head genomic arrangement with TN4 to TN12. However, the functions of these TN and TNL genes in this cluster are still unknown. Here, we showed that the TIR domains of both TNL40 and TNL60 associated with TN10 specifically. Furthermore, both TNL40TIR and TNL60TIR induced cell death in Nicotiana tabacum leaves. Subcellular localization showed that TNL40 mainly localized in the cytoplasm, whereas TNL60 and TN10 localized in both the cytoplasm and nucleus. Additionally, the expression of TNL40, TNL60, and TN10 were co-regulated after inoculated with bacterial pathogens. Taken together, our study indicates that the truncated TIR-NBS protein TN10 associates with two clustered TNL immune receptors, and may work together in plant disease resistance.
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Affiliation(s)
- Yongming Chen
- State Key Laboratory of Ecological Control of Fujian-Taiwan Crop Pests, Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, Plant Immunity Center, Fujian Agriculture and Forestry University, Fuzhou 350002, China; (Y.C.); (G.Z.); (H.C.); (R.C.); (N.L.)
| | - Guitao Zhong
- State Key Laboratory of Ecological Control of Fujian-Taiwan Crop Pests, Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, Plant Immunity Center, Fujian Agriculture and Forestry University, Fuzhou 350002, China; (Y.C.); (G.Z.); (H.C.); (R.C.); (N.L.)
- College of Life Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Huiren Cai
- State Key Laboratory of Ecological Control of Fujian-Taiwan Crop Pests, Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, Plant Immunity Center, Fujian Agriculture and Forestry University, Fuzhou 350002, China; (Y.C.); (G.Z.); (H.C.); (R.C.); (N.L.)
- College of Life Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Renjie Chen
- State Key Laboratory of Ecological Control of Fujian-Taiwan Crop Pests, Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, Plant Immunity Center, Fujian Agriculture and Forestry University, Fuzhou 350002, China; (Y.C.); (G.Z.); (H.C.); (R.C.); (N.L.)
| | - Na Liu
- State Key Laboratory of Ecological Control of Fujian-Taiwan Crop Pests, Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, Plant Immunity Center, Fujian Agriculture and Forestry University, Fuzhou 350002, China; (Y.C.); (G.Z.); (H.C.); (R.C.); (N.L.)
| | - Wei Wang
- State Key Laboratory of Ecological Control of Fujian-Taiwan Crop Pests, Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, Plant Immunity Center, Fujian Agriculture and Forestry University, Fuzhou 350002, China; (Y.C.); (G.Z.); (H.C.); (R.C.); (N.L.)
| | - Dingzhong Tang
- State Key Laboratory of Ecological Control of Fujian-Taiwan Crop Pests, Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, Plant Immunity Center, Fujian Agriculture and Forestry University, Fuzhou 350002, China; (Y.C.); (G.Z.); (H.C.); (R.C.); (N.L.)
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Teixeira RM, Ferreira MA, Raimundo GAS, Fontes EPB. Geminiviral Triggers and Suppressors of Plant Antiviral Immunity. Microorganisms 2021; 9:microorganisms9040775. [PMID: 33917649 PMCID: PMC8067988 DOI: 10.3390/microorganisms9040775] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Revised: 03/26/2021] [Accepted: 03/26/2021] [Indexed: 12/19/2022] Open
Abstract
Geminiviruses are circular single-stranded DNA plant viruses encapsidated into geminate virion particles, which infect many crops and vegetables and, hence, represent significant agricultural constraints worldwide. To maintain their broad-range host spectrum and establish productive infection, the geminiviruses must circumvent a potent plant antiviral immune system, which consists of a multilayered perception system represented by RNA interference sensors and effectors, pattern recognition receptors (PRR), and resistance (R) proteins. This recognition system leads to the activation of conserved defense responses that protect plants against different co-existing viral and nonviral pathogens in nature. Furthermore, a specific antiviral cell surface receptor signaling is activated at the onset of geminivirus infection to suppress global translation. This review highlighted these layers of virus perception and host defenses and the mechanisms developed by geminiviruses to overcome the plant antiviral immunity mechanisms.
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Waheed S, Anwar M, Saleem MA, Wu J, Tayyab M, Hu Z. The Critical Role of Small RNAs in Regulating Plant Innate Immunity. Biomolecules 2021; 11:biom11020184. [PMID: 33572741 PMCID: PMC7912340 DOI: 10.3390/biom11020184] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Revised: 01/14/2021] [Accepted: 01/14/2021] [Indexed: 12/12/2022] Open
Abstract
Plants, due to their sessile nature, have an innate immune system that helps them to defend against different pathogen infections. The defense response of plants is composed of a highly regulated and complex molecular network, involving the extensive reprogramming of gene expression during the presence of pathogenic molecular signatures. Plants attain proper defense against pathogens through the transcriptional regulation of genes encoding defense regulatory proteins and hormone signaling pathways. Small RNAs are emerging as versatile regulators of plant development and act in different tiers of plant immunity, including pathogen-triggered immunity (PTI) and effector-triggered immunity (ETI). The versatile regulatory functions of small RNAs in plant growth and development and response to biotic and abiotic stresses have been widely studied in recent years. However, available information regarding the contribution of small RNAs in plant immunity against pathogens is more limited. This review article will focus on the role of small RNAs in innate immunity in plants.
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Affiliation(s)
- Saquib Waheed
- College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou 350002, China;
| | - Muhammad Anwar
- Guangdong Technology Research Center for Marine Algal Bioengineering, Guangdong Key Laboratory of Plant Epigenetics, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen 518060, China
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
- Correspondence: (M.A.); (Z.H.)
| | - Muhammad Asif Saleem
- Department of Plant Breeding and Genetics, Bahauddin Zakariya University, Multan 60800, Pakistan;
| | - Jinsong Wu
- Shenzhen Key Laboratory of Marine Bioresource & Eco-Environmental Science, Longhua Innovation Institute for Biotechnology, Shenzhen University, Shenzhen 518060, China;
| | - Muhammad Tayyab
- Key Laboratory of Sugarcane Biology and Genetic Breeding, Ministry of Agriculture and Forestry University, Fuzhou 350002, China;
| | - Zhangli Hu
- Guangdong Technology Research Center for Marine Algal Bioengineering, Guangdong Key Laboratory of Plant Epigenetics, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen 518060, China
- Shenzhen Key Laboratory of Marine Bioresource & Eco-Environmental Science, Longhua Innovation Institute for Biotechnology, Shenzhen University, Shenzhen 518060, China;
- Correspondence: (M.A.); (Z.H.)
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Ge C, Wang YG, Lu S, Zhao XY, Hou BK, Balint-Kurti PJ, Wang GF. Multi-Omics Analyses Reveal the Regulatory Network and the Function of ZmUGTs in Maize Defense Response. Front Plant Sci 2021; 12:738261. [PMID: 34630489 PMCID: PMC8497902 DOI: 10.3389/fpls.2021.738261] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Accepted: 08/26/2021] [Indexed: 05/05/2023]
Abstract
Maize is one of the major crops in the world; however, diseases caused by various pathogens seriously affect its yield and quality. The maize Rp1-D21 mutant (mt) caused by the intragenic recombination between two nucleotide-binding, leucine-rich repeat (NLR) proteins, exhibits autoactive hypersensitive response (HR). In this study, we integrated transcriptomic and metabolomic analyses to identify differentially expressed genes (DEGs) and differentially accumulated metabolites (DAMs) in Rp1-D21 mt compared to the wild type (WT). Genes involved in pathogen-associated molecular pattern (PAMP)-triggered immunity (PTI) and effector-triggered immunity (ETI) were enriched among the DEGs. The salicylic acid (SA) pathway and the phenylpropanoid biosynthesis pathway were induced at both the transcriptional and metabolic levels. The DAMs identified included lipids, flavones, and phenolic acids, including 2,5-DHBA O-hexoside, the production of which is catalyzed by uridinediphosphate (UDP)-dependent glycosyltransferase (UGT). Four maize UGTs (ZmUGTs) homologous genes were among the DEGs. Functional analysis by transient co-expression in Nicotiana benthamiana showed that ZmUGT9250 and ZmUGT5174, but not ZmUGT9256 and ZmUGT8707, partially suppressed the HR triggered by Rp1-D21 or its N-terminal coiled-coil signaling domain (CCD21). None of the four ZmUGTs interacted physically with CCD21 in yeast two-hybrid or co-immunoprecipitation assays. We discuss the possibility that ZmUGTs might be involved in defense response by regulating SA homeostasis.
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Affiliation(s)
- Chunxia Ge
- The Key Laboratory of Plant Development and Environmental Adaptation Biology, Ministry of Education, School of Life Sciences, Shandong University, Qingdao, China
- School of Public Health and Management, Binzhou Medical University, Yantai, China
| | - Yi-Ge Wang
- The Key Laboratory of Plant Development and Environmental Adaptation Biology, Ministry of Education, School of Life Sciences, Shandong University, Qingdao, China
| | - Shouping Lu
- Maize Research Institute, Shandong Academy of Agricultural Sciences, Jinan, China
| | - Xiang Yu Zhao
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai'an, China
| | - Bing-Kai Hou
- The Key Laboratory of Plant Development and Environmental Adaptation Biology, Ministry of Education, School of Life Sciences, Shandong University, Qingdao, China
| | - Peter J. Balint-Kurti
- Department of Entomology and Plant Pathology, North Carolina State University, Raleigh, NC, United States
- US Department of Agriculture-Agricultural Research Service, Plant Science Research Unit, Raleigh, NC, United States
| | - Guan-Feng Wang
- The Key Laboratory of Plant Development and Environmental Adaptation Biology, Ministry of Education, School of Life Sciences, Shandong University, Qingdao, China
- *Correspondence: Guan-Feng Wang
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Abstract
This article is part of the Top 10 Unanswered Questions in MPMI invited review series.Plants recognize the presence or invasion of microbes through cell surface-localized pattern recognition receptors (PRRs) and intracellular nucleotide-binding domain leucine-rich repeat receptors (NLRs). Although PRRs and NLRs are activated by ligands located in different subcellular compartments through distinct mechanisms, signals initiated from PRRs and NLRs converge into several common signaling pathways with different dynamics. Increasing evidence suggests that PRR- and NLR-mediated signaling extensively crosstalk and such interaction can greatly influence immune response outcomes. Sophisticated experimental setups enabled dissection of the signaling events downstream of PRRs and NLRs with fine temporal and spatial resolution; however, the molecular links underlying the observed interactions in PRR and NLR signaling remain to be elucidated. In this review, we summarize the latest knowledge about activation and signaling mediated by PRRs and NLRs, deconvolute the intimate association between PRR- and NLR-mediated signaling, and propose hypotheses to guide further research on key topics.[Formula: see text] Copyright © 2021 The Author(s). This is an open access article distributed under the CC BY-NC-ND 4.0 International license.
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Affiliation(s)
- You Lu
- Department of Plant and Microbial Biology, Microbial and Plant Genomics Institute, University of Minnesota, St. Paul, MN 55108, U.S.A
| | - Kenichi Tsuda
- State Key Laboratory of Agricultural Microbiology, Interdisciplinary Sciences Research Institute, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
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Corcuera Martínez MI, Aldonza Torres M, Díez Revilla AM, Maali Centeno S, Mañeru Oria A, Elizari Roncal I, Ibarra Marín B, Casado Del Olmo MI, Escobedo Romero R, Ferraz Torres M. Impact assessment following implementation of a vascular access team. J Vasc Access 2020; 23:135-144. [PMID: 33356810 DOI: 10.1177/1129729820984284] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
BACKGROUND A vascular access team (VAT) was created in 2018 with the aim of improving vascular access and reducing complications associated with catheters. The impact of the introduction of a VAT in the insertion and maintenance of peripheral insertion central catheters (PICCs) was assessed. The cost-benefit associated with the use of a VAT was evaluated and the satisfaction of patients and professionals interacting with the VAT was measured. METHODS In a prospective study, 275 PICCs inserted by the VAT were assessed for their impact on complications. PICCs were implanted with maximum barrier measures using an ultrasound with IC-ECG. Also, patient and professional satisfaction have been analysed thought a questionnaire over the phone or online, and hospital financial data was used to assess the cost impact of the insertion methodology followed by the VAT versus Anaesthesia Service. RESULTS The thrombosis rate was 2.5% (7) and the bacteraemia rate was 1.1% (3). The use of the IC-ECG was correlated with a lower complication than the RX + IC-ECG (OR = 3.28, p = 0.021). In addition, there was a high level of perceived satisfaction for the patients surveyed and for the healthcare professionals involved in the care and management of these devices. The calculated saving for the implementation of the VAT was 61.81% compared with PICCs implanted in Anaesthesia Service. CONCLUSION Low complication rates and high overall satisfaction scores in patients and professionals were observed, showing that a specialist VAT can have a positive impact in the insertion of PICCs and which also has a clear economic benefit.
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Affiliation(s)
- Mª Inés Corcuera Martínez
- Head of the Information Systems and Computerized Clinical Record Department, Complejo Hospitalario de Navarra (CHN), Chair of the intravenous therapy expert committee in (CHN), Mutilva, Navarra, Spain
| | - Marco Aldonza Torres
- Specialist Surgery Unit, Complejo Hospitalario de Navarra (CHN), Pamplona, Spain
| | | | | | - Amaya Mañeru Oria
- Head of Continuing Education, Teaching and Research Unit, Complejo Hospitalario de Navarra (CHN), Pamplona, Spain
| | | | - Beatriz Ibarra Marín
- Head of Hematology Unit and VAT Coordinator, Complejo Hospitalario de Navarra (CHN), Pamplona, Spain
| | | | | | - Marta Ferraz Torres
- Coordinator of computerized Clinical Records, Associate Professor at UPNA (Navarra University), Research member at IDISNA, Complejo Hospitalario de Navarra (CHN), Pamplona, Spain
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B Santos R, Nascimento R, V Coelho A, Figueiredo A. Grapevine-Downy Mildew Rendezvous: Proteome Analysis of the First Hours of an Incompatible Interaction. Plants (Basel) 2020; 9:E1498. [PMID: 33167573 DOI: 10.3390/plants9111498] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Revised: 10/23/2020] [Accepted: 11/02/2020] [Indexed: 12/26/2022]
Abstract
Grapevine is one of the most relevant crops in the world being used for economically important products such as wine. However, relevant grapevine cultivars are heavily affected by diseases such as the downy mildew disease caused by Plasmopara viticola. Improvements on grapevine resistance are made mainly by breeding techniques where resistance traits are introgressed into cultivars with desired grape characteristics. However, there is still a lack of knowledge on how resistant or tolerant cultivars tackle the P. viticola pathogen. In this study, using a shotgun proteomics LC-MS/MS approach, we unravel the protein modulation of a highly tolerant grapevine cultivar, Vitis vinifera “Regent”, in the first hours post inoculation (hpi) with P. viticola. At 6 hpi, proteins related to defense and to response to stimuli are negatively modulated while at 12 hpi there is an accumulation of proteins belonging to both categories. The co-occurrence of indicators of effector-triggered susceptibility (ETS) and effector-triggered immunity (ETI) is detected at both time-points, showing that these defense processes present high plasticity. The results obtained in this study unravel the tolerant grapevine defense strategy towards P. viticola and may provide valuable insights on resistance associated candidates and mechanisms, which may play an important role in the definition of new strategies for breeding approaches.
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Pradhan A, Ghosh S, Sahoo D, Jha G. Fungal effectors, the double edge sword of phytopathogens. Curr Genet 2020; 67:27-40. [PMID: 33146780 DOI: 10.1007/s00294-020-01118-3] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Revised: 09/24/2020] [Accepted: 10/13/2020] [Indexed: 12/17/2022]
Abstract
Phyto-pathogenic fungi can cause huge damage to crop production. During millions of years of coexistence, fungi have evolved diverse life-style to obtain nutrients from the host and to colonize upon them. They deploy various proteinaceous as well as non-proteinaceous secreted molecules commonly referred as effectors to sabotage host machinery during the infection process. The effectors are important virulence determinants of pathogenic fungi and play important role in successful pathogenesis, predominantly by avoiding host-surveillance system. However, besides being important for pathogenesis, the fungal effectors end-up being recognized by the resistant cultivars of the host, which mount a strong immune response to ward-off pathogens. Various recent studies involving different pathosystem have revealed the virulence/avirulence functions of fungal effectors and their involvement in governing the outcome of host-pathogen interactions. However, the effectors and their cognate resistance gene in the host remain elusive for several economically important fungal pathogens. In this review, using examples from some of the biotrophic, hemi-biotrophic and necrotrophic pathogens, we elaborate the double-edged functions of fungal effectors. We emphasize that knowledge of effector functions can be helpful in effective management of fungal diseases in crop plants.
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Affiliation(s)
- Amrita Pradhan
- Plant Microbe Interactions Laboratory, National Institute of Plant Genome Research, Aruna Asaf Ali Marg, New Delhi, 110067, India
| | - Srayan Ghosh
- Plant Microbe Interactions Laboratory, National Institute of Plant Genome Research, Aruna Asaf Ali Marg, New Delhi, 110067, India
| | - Debashis Sahoo
- Plant Microbe Interactions Laboratory, National Institute of Plant Genome Research, Aruna Asaf Ali Marg, New Delhi, 110067, India
| | - Gopaljee Jha
- Plant Microbe Interactions Laboratory, National Institute of Plant Genome Research, Aruna Asaf Ali Marg, New Delhi, 110067, India.
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