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Gan X, Sengottaiyan P, Park KH, Assmann SM, Albert R. A network-based modeling framework reveals the core signal transduction network underlying high carbon dioxide-induced stomatal closure in guard cells. PLoS Biol 2024; 22:e3002592. [PMID: 38691548 PMCID: PMC11090369 DOI: 10.1371/journal.pbio.3002592] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Revised: 05/13/2024] [Accepted: 03/15/2024] [Indexed: 05/03/2024] Open
Abstract
Stomata are pores on plant aerial surfaces, each bordered by a pair of guard cells. They control gas exchange vital for plant survival. Understanding how guard cells respond to environmental signals such as atmospheric carbon dioxide (CO2) levels is not only insightful to fundamental biology but also relevant to real-world issues of crop productivity under global climate change. In the past decade, multiple important signaling elements for stomatal closure induced by elevated CO2 have been identified. Yet, there is no comprehensive understanding of high CO2-induced stomatal closure. In this work, we assemble a cellular signaling network underlying high CO2-induced stomatal closure by integrating evidence from a comprehensive literature analysis. We further construct a Boolean dynamic model of the network, which allows in silico simulation of the stomatal closure response to high CO2 in wild-type Arabidopsis thaliana plants and in cases of pharmacological or genetic manipulation of network nodes. Our model has a 91% accuracy in capturing known experimental observations. We perform network-based logical analysis and reveal a feedback core of the network, which dictates cellular decisions in closure response to high CO2. Based on these analyses, we predict and experimentally confirm that applying nitric oxide (NO) induces stomatal closure in ambient CO2 and causes hypersensitivity to elevated CO2. Moreover, we predict a negative regulatory relationship between NO and the protein phosphatase ABI2 and find experimentally that NO inhibits ABI2 phosphatase activity. The experimental validation of these model predictions demonstrates the effectiveness of network-based modeling and highlights the decision-making role of the feedback core of the network in signal transduction. We further explore the model's potential in predicting targets of signaling elements not yet connected to the CO2 network. Our combination of network science, in silico model simulation, and experimental assays demonstrates an effective interdisciplinary approach to understanding system-level biology.
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Affiliation(s)
- Xiao Gan
- Institute for AI in Medicine, School of Artificial Intelligence, Nanjing University of Information Science and Technology, Nanjing, China
- Department of Physics, Pennsylvania State University, University Park, Pennsylvania, United States of America
- Department of Biology, Pennsylvania State University, University Park, Pennsylvania, United States of America
| | - Palanivelu Sengottaiyan
- Department of Biology, Pennsylvania State University, University Park, Pennsylvania, United States of America
| | - Kyu Hyong Park
- Department of Physics, Pennsylvania State University, University Park, Pennsylvania, United States of America
| | - Sarah M Assmann
- Department of Biology, Pennsylvania State University, University Park, Pennsylvania, United States of America
| | - Réka Albert
- Department of Physics, Pennsylvania State University, University Park, Pennsylvania, United States of America
- Department of Biology, Pennsylvania State University, University Park, Pennsylvania, United States of America
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2
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Bibi G, Shafique I, Ali S, Ahmad R, Shah MM, Naqvi TA, Zeb I, Maathuis FJM, Hussain J. Cyclic guanosine monophosphate improves salt tolerance in Solanum lycopersicum. JOURNAL OF PLANT RESEARCH 2024; 137:111-124. [PMID: 37610631 PMCID: PMC10764492 DOI: 10.1007/s10265-023-01487-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Accepted: 07/30/2023] [Indexed: 08/24/2023]
Abstract
The cyclic nucleotide cyclic guanosine monophosphate (cGMP) is a powerful cell signaling molecule involved in biotic and abiotic stress perception and signal transduction. In the model plant Arabidopsis thaliana, salt and osmotic stress rapidly induce increase in cGMP which plays role by modulating the activity of monovalent cation transporters, possibly by direct binding to these proteins and by altering the expression of many abiotic stress responsive genes. In a recent study, a membrane permeable analogue of cGMP (8-bromo-cGMP) was found to have a promotive effect on soluble sugar, flavonoids and lignin content, and membrane integrity in Solanum lycopersicum seedlings under salt stress. However, it remains to be elucidated how salt stress affects the endogenous cGMP level in S. lycopersicum and if Br-cGMP-induced improvement in salt tolerance in S. lycopersicum involves altered cation fluxes. The current study was conducted to answer these questions. A rapid increase (within 30 s) in endogenous cGMP level was determined in S. lycopersicum roots after treatment with 100 mM NaCl. Addition of membrane permeable Br-cGMP in growth medium remarkably ameliorated the inhibitory effects of NaCl on seedlings' growth parameters, chlorophyll content and net photosynthesis rate. In salt stressed plants, Br-cGMP significantly decreased Na+ content by reducing its influx and increasing efflux while it improved plants K+ content by reducing its efflux and enhancing influx. Furthermore, supplementation with Br-cGMP improved plant's proline content and total antioxidant capacity, resulting in markedly decreased electrolyte leakage under salt stress. Br-cGMP increased the expression of Na+/H+ antiporter genes in roots and shoots of S. lycopersicum growing under salt stress, potentially enhancing plant's ability to sequester Na+ into the vacuole. The findings of this study provide insights into the mechanism of cGMP-induced salt stress tolerance in S. lycopersicum.
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Affiliation(s)
- Gulnaz Bibi
- Department of Biotechnology, COMSATS University Islamabad, Abbottabad Campus, University Road, Tobe Camp, Abbottabad, 22060, Pakistan
| | - Iqra Shafique
- Department of Biotechnology, COMSATS University Islamabad, Abbottabad Campus, University Road, Tobe Camp, Abbottabad, 22060, Pakistan
| | - Sartaj Ali
- Department of Biotechnology, COMSATS University Islamabad, Abbottabad Campus, University Road, Tobe Camp, Abbottabad, 22060, Pakistan
| | - Raza Ahmad
- Department of Biotechnology, COMSATS University Islamabad, Abbottabad Campus, University Road, Tobe Camp, Abbottabad, 22060, Pakistan
| | - Mohammad Maroof Shah
- Department of Biotechnology, COMSATS University Islamabad, Abbottabad Campus, University Road, Tobe Camp, Abbottabad, 22060, Pakistan
| | - Tatheer Alam Naqvi
- Department of Biotechnology, COMSATS University Islamabad, Abbottabad Campus, University Road, Tobe Camp, Abbottabad, 22060, Pakistan
| | - Iftikhar Zeb
- Department of Biotechnology, COMSATS University Islamabad, Abbottabad Campus, University Road, Tobe Camp, Abbottabad, 22060, Pakistan
| | | | - Jamshaid Hussain
- Department of Biotechnology, COMSATS University Islamabad, Abbottabad Campus, University Road, Tobe Camp, Abbottabad, 22060, Pakistan.
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3
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Liu Y, Ge L, Tang H, Zheng J, Hu J, Wang J, Yang X, Zhang R, Wang X, Li X, Zhang Y, Shi Q. cGMP functions as an important messenger involved in SlSAMS1-regulated salt stress tolerance in tomato. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2023; 204:108097. [PMID: 37864930 DOI: 10.1016/j.plaphy.2023.108097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2023] [Revised: 10/04/2023] [Accepted: 10/12/2023] [Indexed: 10/23/2023]
Abstract
Salt stress adversely affects the growth, development, and yield of tomato (Solanum lycopersicum). SAM Synthetase (SAMS), which is responsible for the biosynthesis of S-adenosylmethionine (SAM, a precursor of polyamine biosynthesis), participates in plant response to abiotic stress. However, the regulatory mechanism of SAMS-mediated salt stress tolerance remains elusive. In this study, we characterized a SAMS homologue SlSAMS1 in tomato. We found that SlSAMS1 is highly expressed in tomato roots, and its expression can be induced by salt stress. Crucially, overexpression of SlSAMS1 in tomato enhances salt stress tolerance. Through metabolomic profiling, we identified some differentially accumulated metabolites, especially, a secondary messenger guanosine 3',5'-cyclic monophosphate (cGMP) which may play a key role in SlSAMS1-regulated salt tolerance. A series of physiological and biochemical data suggest that cGMP alleviates salt stress-induced growth inhibition, and potentially acts downstream of the polyamine-nitric oxide (PA-NO) signaling pathway to trigger H2O2 signaling in response to salt stress. Taken together, the study reveals that SlSAMS1 regulates tomato salt tolerance via the PA-NO-cGMP-H2O2 signal module. Our findings elucidate the regulatory pathway of SlSAMS1-induced plant response to salt stress and indicate a pivotal role of cGMP in salt tolerance.
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Affiliation(s)
- Yue Liu
- College of Horticulture Science and Engineering, Shandong Agricultural University, Taian, 271018, Shandong, PR China
| | - Lianjing Ge
- College of Horticulture Science and Engineering, Shandong Agricultural University, Taian, 271018, Shandong, PR China
| | - Huimeng Tang
- College of Horticulture Science and Engineering, Shandong Agricultural University, Taian, 271018, Shandong, PR China
| | - Jinhui Zheng
- College of Horticulture Science and Engineering, Shandong Agricultural University, Taian, 271018, Shandong, PR China
| | - Jinxiang Hu
- College of Horticulture Science and Engineering, Shandong Agricultural University, Taian, 271018, Shandong, PR China
| | - Jingru Wang
- College of Horticulture Science and Engineering, Shandong Agricultural University, Taian, 271018, Shandong, PR China
| | - Xiaoyu Yang
- College of Horticulture Science and Engineering, Shandong Agricultural University, Taian, 271018, Shandong, PR China
| | - Ruimin Zhang
- College of Horticulture Science and Engineering, Shandong Agricultural University, Taian, 271018, Shandong, PR China
| | - Xiaoyun Wang
- College of Horticulture Science and Engineering, Shandong Agricultural University, Taian, 271018, Shandong, PR China
| | - Xiuming Li
- College of Horticulture Science and Engineering, Shandong Agricultural University, Taian, 271018, Shandong, PR China
| | - Yan Zhang
- College of Horticulture Science and Engineering, Shandong Agricultural University, Taian, 271018, Shandong, PR China.
| | - Qinghua Shi
- College of Horticulture Science and Engineering, Shandong Agricultural University, Taian, 271018, Shandong, PR China.
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Świeżawska-Boniecka B, Szmidt-Jaworska A. Phytohormones and cyclic nucleotides - Long-awaited couples? JOURNAL OF PLANT PHYSIOLOGY 2023; 286:154005. [PMID: 37186984 DOI: 10.1016/j.jplph.2023.154005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Accepted: 05/09/2023] [Indexed: 05/17/2023]
Affiliation(s)
- Brygida Świeżawska-Boniecka
- Nicolaus Copernicus University, Faculty of Biological and Veterinary Sciences, Department of Plant Physiology and Biotechnology, Lwowska St. 1, PL 87-100, Torun, Poland.
| | - Adriana Szmidt-Jaworska
- Nicolaus Copernicus University, Faculty of Biological and Veterinary Sciences, Department of Plant Physiology and Biotechnology, Lwowska St. 1, PL 87-100, Torun, Poland.
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5
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Mata-Pérez C, Sánchez-Vicente I, Arteaga N, Gómez-Jiménez S, Fuentes-Terrón A, Oulebsir CS, Calvo-Polanco M, Oliver C, Lorenzo Ó. Functions of nitric oxide-mediated post-translational modifications under abiotic stress. FRONTIERS IN PLANT SCIENCE 2023; 14:1158184. [PMID: 37063215 PMCID: PMC10101340 DOI: 10.3389/fpls.2023.1158184] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Accepted: 03/14/2023] [Indexed: 06/19/2023]
Abstract
Environmental conditions greatly impact plant growth and development. In the current context of both global climate change and land degradation, abiotic stresses usually lead to growth restriction limiting crop production. Plants have evolved to sense and respond to maximize adaptation and survival; therefore, understanding the mechanisms involved in the different converging signaling networks becomes critical for improving plant tolerance. In the last few years, several studies have shown the plant responses against drought and salinity, high and low temperatures, mechanical wounding, heavy metals, hypoxia, UV radiation, or ozone stresses. These threats lead the plant to coordinate a crosstalk among different pathways, highlighting the role of phytohormones and reactive oxygen and nitrogen species (RONS). In particular, plants sense these reactive species through post-translational modification (PTM) of macromolecules such as nucleic acids, proteins, and fatty acids, hence triggering antioxidant responses with molecular implications in the plant welfare. Here, this review compiles the state of the art about how plant systems sense and transduce this crosstalk through PTMs of biological molecules, highlighting the S-nitrosylation of protein targets. These molecular mechanisms finally impact at a physiological level facing the abiotic stressful traits that could lead to establishing molecular patterns underlying stress responses and adaptation strategies.
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6
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Zhu X, Su M, Wang B, Wei X. Transcriptome analysis reveals the main metabolic pathway of c-GMP induced by salt stress in tomato ( Solanum lycopersicum) seedlings. FUNCTIONAL PLANT BIOLOGY : FPB 2022; 49:784-798. [PMID: 35930479 DOI: 10.1071/fp21337] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Accepted: 04/24/2022] [Indexed: 06/15/2023]
Abstract
Tomato (Solanum lycopersicum L.) is a model crop as well as an important food worldwide. In arid areas, increasing soil salinity has limited higher yields in tomato production. As a second messenger molecule, cyclic guanosine monophosphate (c-GMP) plays an indispensable role in plant response to salt stress by regulating cell processes to promote plant growth and development. However, this mechanism has not been fully explored in tomato seedlings. In this experiment, tomato seeds were cultured in four treatments: (1) distilled water (CK); (2) 20μM c-GMP (T1); (3) 50mM NaCl (T2); and (4) 20μM c-GMP+50mM NaCl (T3). The results show that 20μM c-GMP effectively alleviated the inhibitory effect of 50mM NaCl on growth and development, and induced the expression of 1580 differentially expressed genes (DEGs). Seedlings in the CK vs T1 shared 95 upregulated and 442 downregulated DEGs, whereas T2 vs T3 shared 271 upregulated and 772 downregulated DEGs. Based on KEGG (Kyoto Encyclopaedia of Genes and Genomes) analysis, the majority of DEGs were involved in metabolism; exogenous c-GMP induced significant enrichment of pathways associated with carbohydrates, phenylpropanoids and fatty acid metabolism. Most PMEs , acCoA , PAL , PODs , FADs , and AD were upregulated, and GAPDHs , PL , PG , BXL4 , and β-G were downregulated, which reduced susceptibility of tomato seedlings to salt and promoted their salt tolerance. The application of c-GMP increased soluble sugar, flavonoid and lignin contents, reduced accumulation of malondialdehyde (MDA), and enhanced the activity of peroxidase (POD). Thus, our results provide insights into the molecular mechanisms associated with salt tolerance of tomato seedlings.
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Affiliation(s)
- Xiaolin Zhu
- College of Agronomy, Gansu Agricultural University, Lanzhou 730070, China; and Gansu Provincial Key Laboratory of Aridland Crop Science, Gansu Agricultural University, Lanzhou 730070, China; and College of Life Science and Technology, Gansu Agricultural University, Lanzhou 730070, China
| | - Meifei Su
- Gansu Provincial Key Laboratory of Aridland Crop Science, Gansu Agricultural University, Lanzhou 730070, China; and College of Life Science and Technology, Gansu Agricultural University, Lanzhou 730070, China
| | - Baoqiang Wang
- Gansu Provincial Key Laboratory of Aridland Crop Science, Gansu Agricultural University, Lanzhou 730070, China; and College of Life Science and Technology, Gansu Agricultural University, Lanzhou 730070, China
| | - Xiaohong Wei
- College of Agronomy, Gansu Agricultural University, Lanzhou 730070, China; and Gansu Provincial Key Laboratory of Aridland Crop Science, Gansu Agricultural University, Lanzhou 730070, China; and College of Life Science and Technology, Gansu Agricultural University, Lanzhou 730070, China
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7
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Effects of Storage Temperature on Indica-Japonica Hybrid Rice Metabolites, Analyzed Using Liquid Chromatography and Mass Spectrometry. Int J Mol Sci 2022; 23:ijms23137421. [PMID: 35806428 PMCID: PMC9266784 DOI: 10.3390/ijms23137421] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2022] [Revised: 06/27/2022] [Accepted: 06/30/2022] [Indexed: 12/04/2022] Open
Abstract
The Yongyou series of indica-japonica hybrid rice has excellent production potential and storage performance. However, little is known about the underlying mechanism of its storage resistance. In this study, Yongyou 1540 rice (Oryza sativa cv. yongyou 1540) was stored at different temperatures, and the storability was validated though measuring nutritional components and apparent change. In addition, a broad-targeted metabolomic approach coupled with liquid chromatography-mass spectrometry was applied to analyze the metabolite changes. The study found that under high temperature storage conditions (35 °C), Yongyou 1540 was not significantly worse in terms of fatty acid value, whiteness value, and changes in electron microscope profile. A total of 19 key differential metabolites were screened, and lipid metabolites related to palmitoleic acid were found to affect the aging of rice. At the same time, two substances, guanosine 3′,5′-cyclophosphate and pipecolic acid, were beneficial to enhance the resistance of rice under harsh storage conditions, thereby delaying the deterioration of its quality and maintaining its quality. Significant regulation of galactose metabolism, alanine, aspartate and glutamate metabolism, butyrate metabolism, and arginine and proline metabolism pathways were probably responsible for the good storage capacity of Yongyou 1540.
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8
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Maheshwari P, Assmann SM, Albert R. Inference of a Boolean Network From Causal Logic Implications. Front Genet 2022; 13:836856. [PMID: 35783282 PMCID: PMC9246059 DOI: 10.3389/fgene.2022.836856] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Accepted: 05/23/2022] [Indexed: 11/13/2022] Open
Abstract
Biological systems contain a large number of molecules that have diverse interactions. A fruitful path to understanding these systems is to represent them with interaction networks, and then describe flow processes in the network with a dynamic model. Boolean modeling, the simplest discrete dynamic modeling framework for biological networks, has proven its value in recapitulating experimental results and making predictions. A first step and major roadblock to the widespread use of Boolean networks in biology is the laborious network inference and construction process. Here we present a streamlined network inference method that combines the discovery of a parsimonious network structure and the identification of Boolean functions that determine the dynamics of the system. This inference method is based on a causal logic analysis method that associates a logic type (sufficient or necessary) to node-pair relationships (whether promoting or inhibitory). We use the causal logic framework to assimilate indirect information obtained from perturbation experiments and infer relationships that have not yet been documented experimentally. We apply this inference method to a well-studied process of hormone signaling in plants, the signaling underlying abscisic acid (ABA)—induced stomatal closure. Applying the causal logic inference method significantly reduces the manual work typically required for network and Boolean model construction. The inferred model agrees with the manually curated model. We also test this method by re-inferring a network representing epithelial to mesenchymal transition based on a subset of the information that was initially used to construct the model. We find that the inference method performs well for various likely scenarios of inference input information. We conclude that our method is an effective approach toward inference of biological networks and can become an efficient step in the iterative process between experiments and computations.
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Affiliation(s)
- Parul Maheshwari
- Department of Physics, Penn State University, University Park, PA, United States
- *Correspondence: Parul Maheshwari, ; Reka Albert,
| | - Sarah M. Assmann
- Biology Department, Penn State University, University Park, PA, United States
| | - Reka Albert
- Department of Physics, Penn State University, University Park, PA, United States
- Biology Department, Penn State University, University Park, PA, United States
- *Correspondence: Parul Maheshwari, ; Reka Albert,
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9
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Wong A, Hu N, Tian X, Yang Y, Gehring C. Nitric oxide sensing revisited. TRENDS IN PLANT SCIENCE 2021; 26:885-897. [PMID: 33867269 DOI: 10.1016/j.tplants.2021.03.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Revised: 03/10/2021] [Accepted: 03/17/2021] [Indexed: 05/22/2023]
Abstract
Nitric oxide (NO) sensing is an ancient trait enabled by hemoproteins harboring a highly conserved Heme-Nitric oxide/OXygen (H-NOX) domain that operates throughout bacteria, fungi, and animal kingdoms including in humans, but that has long thought to be absent in plants. Recently, H-NOX-containing plant hemoproteins mediating crucial NO-dependent responses such as stomatal closure and pollen tube guidance have been reported. There are indications that the detection method that led to these discoveries will uncover many more heme-based NO sensors that operate as regulatory sites in complex proteins. Their characterizations will in turn offer a much more complete picture of plant NO responses at both the molecular and systems level.
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Affiliation(s)
- Aloysius Wong
- Department of Biology, College of Science and Technology, Wenzhou-Kean University, 88 Daxue Road, Ouhai, Wenzhou, Zhejiang Province 325060, China; Zhejiang Bioinformatics International Science and Technology Cooperation Center, Wenzhou-Kean University, Ouhai, Wenzhou, Zhejiang Province 325060, China.
| | - Ningxin Hu
- Department of Biology, College of Science and Technology, Wenzhou-Kean University, 88 Daxue Road, Ouhai, Wenzhou, Zhejiang Province 325060, China
| | - Xuechen Tian
- Department of Biology, College of Science and Technology, Wenzhou-Kean University, 88 Daxue Road, Ouhai, Wenzhou, Zhejiang Province 325060, China
| | - Yixin Yang
- Department of Biology, College of Science and Technology, Wenzhou-Kean University, 88 Daxue Road, Ouhai, Wenzhou, Zhejiang Province 325060, China; Zhejiang Bioinformatics International Science and Technology Cooperation Center, Wenzhou-Kean University, Ouhai, Wenzhou, Zhejiang Province 325060, China
| | - Christoph Gehring
- Department of Chemistry, Biology, and Biotechnology, University of Perugia, I-06121 Perugia, Italy
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Liu L, Huang L, Sun C, Wang L, Jin C, Lin X. Cross-Talk between Hydrogen Peroxide and Nitric Oxide during Plant Development and Responses to Stress. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:9485-9497. [PMID: 34428901 DOI: 10.1021/acs.jafc.1c01605] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Nitric oxide (NO) and hydrogen peroxide (H2O2) are gradually becoming established as critical regulators in plants under physiological and stressful conditions. Strong spatiotemporal correlations in their production and distribution have been identified in various plant biological processes. In this context, NO and H2O2 act synergistically or antagonistically as signals or stress promoters depending on their respective concentrations, engaging in processes such as the hypersensitive response, stomatal movement, and abiotic stress responses. Moreover, proteins identified as potential targets of NO-based modifications include a number of enzymes related to H2O2 metabolism, reinforcing their cross-talk. In this review, several processes of well-characterized functional interplay between H2O2 and NO are discussed with respect to the most recent reported evidence on hypersensitive response-induced programmed cell death, stomatal movement, and plant responses to adverse conditions and, where known, the molecular mechanisms and factors underpinning their cross-talk.
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Affiliation(s)
- Lijuan Liu
- Key Laboratory of Pollution Exposure and Health Intervention Technology, Interdisciplinary Research Academy (IRA), Zhejiang Shuren University, Hangzhou 310015, China
| | - Lin Huang
- MOE Key Laboratory of Environment Remediation and Ecological Health, College of Natural Resource & Environmental Sciences, Zhejiang University, Hangzhou 310058, China
| | - Chengliang Sun
- MOE Key Laboratory of Environment Remediation and Ecological Health, College of Natural Resource & Environmental Sciences, Zhejiang University, Hangzhou 310058, China
| | - Luxuan Wang
- Department of Agriculture and Environment, McGill University, Montreal, Quebec H9X 3V9, Canada
| | - Chongwei Jin
- MOE Key Laboratory of Environment Remediation and Ecological Health, College of Natural Resource & Environmental Sciences, Zhejiang University, Hangzhou 310058, China
| | - Xianyong Lin
- MOE Key Laboratory of Environment Remediation and Ecological Health, College of Natural Resource & Environmental Sciences, Zhejiang University, Hangzhou 310058, China
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11
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Zhou X, Joshi S, Khare T, Patil S, Shang J, Kumar V. Nitric oxide, crosstalk with stress regulators and plant abiotic stress tolerance. PLANT CELL REPORTS 2021; 40:1395-1414. [PMID: 33974111 DOI: 10.1007/s00299-021-02705-5] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Accepted: 04/26/2021] [Indexed: 06/12/2023]
Abstract
Nitric oxide is a dynamic gaseous molecule involved in signalling, crosstalk with stress regulators, and plant abiotic-stress responses. It has great exploratory potentials for engineering abiotic stress tolerance in crops. Nitric oxide (NO), a redox-active gaseous signalling molecule, though present uniformly through the eukaryotes, maintain its specificity in plants with respect to its formation, signalling, and functions. Its cellular concentrations are decisive for its function, as a signalling molecule at lower concentrations, but triggers nitro-oxidative stress and cellular damage when produced at higher concentrations. Besides, it also acts as a potent stress alleviator. Discovered in animals as neurotransmitter, NO has come a long way to being a stress radical and growth regulator in plants. As a key redox molecule, it exhibits several key cellular and molecular interactions including with reactive chemical species, hydrogen sulphide, and calcium. Apart from being a signalling molecule, it is emerging as a key player involved in regulations of plant growth, development and plant-environment interactions. It is involved in crosstalk with stress regulators and is thus pivotal in these stress regulatory mechanisms. NO is getting an unprecedented attention from research community, being investigated and explored for its multifaceted roles in plant abiotic stress tolerance. Through this review, we intend to present the current knowledge and updates on NO biosynthesis and signalling, crosstalk with stress regulators, and how biotechnological manipulations of NO pathway are leading towards developing transgenic crop plants that can withstand environmental stresses and climate change. The targets of various stress responsive miRNA signalling have also been discussed besides giving an account of current approaches used to characterise and detect the NO.
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Affiliation(s)
- Xianrong Zhou
- School of Life Science and Biotechnology, Yangtze Normal University, Chongqing, 408100, China.
| | - Shrushti Joshi
- Department of Biotechnology, Modern College of Arts, Science and Commerce, Savitribai Phule Pune University, Ganeshkhind, Pune, 411016, India
| | - Tushar Khare
- Department of Biotechnology, Modern College of Arts, Science and Commerce, Savitribai Phule Pune University, Ganeshkhind, Pune, 411016, India
- Department of Environmental Science, Savitribai Phule Pune University, Pune, 411007, India
| | - Suraj Patil
- Department of Biotechnology, Modern College of Arts, Science and Commerce, Savitribai Phule Pune University, Ganeshkhind, Pune, 411016, India
| | - Jin Shang
- School of Life Science and Biotechnology, Yangtze Normal University, Chongqing, 408100, China
| | - Vinay Kumar
- Department of Biotechnology, Modern College of Arts, Science and Commerce, Savitribai Phule Pune University, Ganeshkhind, Pune, 411016, India.
- Department of Environmental Science, Savitribai Phule Pune University, Pune, 411007, India.
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12
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Iqbal N, Umar S, Khan NA, Corpas FJ. Crosstalk between abscisic acid and nitric oxide under heat stress: exploring new vantage points. PLANT CELL REPORTS 2021; 40:1429-1450. [PMID: 33909122 DOI: 10.1007/s00299-021-02695-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Accepted: 04/05/2021] [Indexed: 05/22/2023]
Abstract
Heat stress adversely affects plants growth potential. Global warming is reported to increase in the intensity, frequency, and duration of heatwaves, eventually affecting ecology, agriculture and economy. With an expected increase in average temperature by 2-3 °C over the next 30-50 years, crop production is facing a severe threat to sub-optimum growth conditions. Abscisic acid (ABA) and nitric oxide (NO) are growth regulators that are involved in the adaptation to heat stress by affecting each other and changing the adaptation process. The interaction between these molecules has been discussed in various studies in general or under stress conditions; however, regarding high temperature, their interaction has little been worked out. In the present review, the focus is shifted on the role of these molecules under heat stress emphasizing the different possible interactions between ABA and NO as both regulate stomatal closure and other molecules including hydrogen peroxide (H2O2), hydrogen sulfide (H2S), antioxidants, proline, glycine betaine, calcium (Ca2+) and heat shock protein (HSP). Exploring the crosstalk between ABA and NO with other molecules under heat stress will provide us with a comprehensive knowledge of plants mechanism of heat tolerance which could be useful to develop heat stress-resistant varieties.
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Affiliation(s)
- Noushina Iqbal
- Department of Botany, School of Chemical and Life Sciences, Jamia Hamdard, New Delhi, 110062, India.
| | - Shahid Umar
- Department of Botany, School of Chemical and Life Sciences, Jamia Hamdard, New Delhi, 110062, India
| | - Nafees A Khan
- Plant Physiology and Biochemistry Laboratory, Department of Botany, Aligarh Muslim University, Aligarh, 202002, India
| | - Francisco J Corpas
- Group of Antioxidants, Free Radicals and Nitric Oxide in Biotechnology, Food and Agriculture, Department of Biochemistry, Cell and Molecular Biology of Plants, Estación Experimental del Zaidín, CSIC, Apartado 419, 18080, Granada, Spain.
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13
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Zhou W, Chi W, Shen W, Dou W, Wang J, Tian X, Gehring C, Wong A. Computational Identification of Functional Centers in Complex Proteins: A Step-by-Step Guide With Examples. FRONTIERS IN BIOINFORMATICS 2021; 1:652286. [PMID: 36303732 PMCID: PMC9581015 DOI: 10.3389/fbinf.2021.652286] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Accepted: 03/02/2021] [Indexed: 11/13/2022] Open
Abstract
In proteins, functional centers consist of the key amino acids required to perform molecular functions such as catalysis, ligand-binding, hormone- and gas-sensing. These centers are often embedded within complex multi-domain proteins and can perform important cellular signaling functions that enable fine-tuning of temporal and spatial regulation of signaling molecules and networks. To discover hidden functional centers, we have developed a protocol that consists of the following sequential steps. The first is the assembly of a search motif based on the key amino acids in the functional center followed by querying proteomes of interest with the assembled motif. The second consists of a structural assessment of proteins that harbor the motif. This approach, that relies on the application of computational tools for the analysis of data in public repositories and the biological interpretation of the search results, has to-date uncovered several novel functional centers in complex proteins. Here, we use recent examples to describe a step-by-step guide that details the workflow of this approach and supplement with notes, recommendations and cautions to make this protocol robust and widely applicable for the discovery of hidden functional centers.
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Affiliation(s)
- Wei Zhou
- Department of Biology, College of Science and Technology, Wenzhou-Kean University, Wenzhou, China
| | - Wei Chi
- Department of Biology, College of Science and Technology, Wenzhou-Kean University, Wenzhou, China
| | - Wanting Shen
- Department of Biology, College of Science and Technology, Wenzhou-Kean University, Wenzhou, China
| | - Wanying Dou
- Department of Computer Science, College of Science and Technology, Wenzhou-Kean University, Wenzhou, China
| | - Junyi Wang
- Department of Biology, College of Science and Technology, Wenzhou-Kean University, Wenzhou, China
| | - Xuechen Tian
- Department of Biology, College of Science and Technology, Wenzhou-Kean University, Wenzhou, China
| | - Christoph Gehring
- Department of Chemistry, Biology and Biotechnology, University of Perugia, Perugia, Italy
| | - Aloysius Wong
- Department of Biology, College of Science and Technology, Wenzhou-Kean University, Wenzhou, China
- Zhejiang Bioinformatics International Science and Technology Cooperation Center of Wenzhou-Kean University, Wenzhou, China
- *Correspondence: Aloysius Wong
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14
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Lopes-Oliveira PJ, Oliveira HC, Kolbert Z, Freschi L. The light and dark sides of nitric oxide: multifaceted roles of nitric oxide in plant responses to light. JOURNAL OF EXPERIMENTAL BOTANY 2021; 72:885-903. [PMID: 33245760 DOI: 10.1093/jxb/eraa504] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2020] [Accepted: 10/26/2020] [Indexed: 06/11/2023]
Abstract
Light drives photosynthesis and informs plants about their surroundings. Regarded as a multifunctional signaling molecule in plants, nitric oxide (NO) has been repeatedly demonstrated to interact with light signaling cascades to control plant growth, development and metabolism. During early plant development, light-triggered NO accumulation counteracts negative regulators of photomorphogenesis and modulates the abundance of, and sensitivity to, plant hormones to promote seed germination and de-etiolation. In photosynthetically active tissues, NO is generated at distinct rates under light or dark conditions and acts at multiple target sites within chloroplasts to regulate photosynthetic reactions. Moreover, changes in NO concentrations in response to light stress promote plant defenses against oxidative stress under high light or ultraviolet-B radiation. Here we review the literature on the interaction of NO with the complicated light and hormonal signaling cascades controlling plant photomorphogenesis and light stress responses, focusing on the recently identified molecular partners and action mechanisms of NO in these events. We also discuss the versatile role of NO in regulating both photosynthesis and light-dependent stomatal movements, two key determinants of plant carbon gain. The regulation of nitrate reductase (NR) by light is highlighted as vital to adjust NO production in plants living under natural light conditions.
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Affiliation(s)
| | - Halley Caixeta Oliveira
- Department of Animal and Plant Biology, Universidade Estadual de Londrina (UEL), Londrina, Brazil
| | | | - Luciano Freschi
- Laboratory of Plant Physiology and Biochemistry, Department of Botany, University of Sao Paulo, Brazil
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15
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Wong A, Tian X, Yang Y, Gehring C. Identification of potential nitric oxide-sensing proteins using the H-NOX motif. MOLECULAR PLANT 2021; 14:195-197. [PMID: 33249236 DOI: 10.1016/j.molp.2020.11.015] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Revised: 08/05/2020] [Accepted: 11/23/2020] [Indexed: 05/24/2023]
Affiliation(s)
- Aloysius Wong
- Department of Biology, College of Science and Technology, Wenzhou-Kean University, 88 Daxue Road, Ouhai, Wenzhou, Zhejiang Province 325060, China.
| | - Xuechen Tian
- Department of Biology, College of Science and Technology, Wenzhou-Kean University, 88 Daxue Road, Ouhai, Wenzhou, Zhejiang Province 325060, China
| | - Yixin Yang
- Department of Biology, College of Science and Technology, Wenzhou-Kean University, 88 Daxue Road, Ouhai, Wenzhou, Zhejiang Province 325060, China
| | - Christoph Gehring
- Department of Chemistry, Biology & Biotechnology, University of Perugia, 06121 Perugia, Italy
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16
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Xiang Q, Lott AA, Assmann SM, Chen S. Advances and perspectives in the metabolomics of stomatal movement and the disease triangle. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2021; 302:110697. [PMID: 33288010 DOI: 10.1016/j.plantsci.2020.110697] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Revised: 09/26/2020] [Accepted: 09/28/2020] [Indexed: 05/20/2023]
Abstract
Crops are continuously exposed to microbial pathogens that cause tremendous yield losses worldwide. Stomatal pores formed by pairs of specialized guard cells in the leaf epidermis represent a major route of pathogen entry. Guard cells have an essential role as a first line of defense against pathogens. Metabolomics is an indispensable systems biology tool that has facilitated discovery and functional studies of metabolites that regulate stomatal movement in response to pathogens and other environmental factors. Guard cells, pathogens and environmental factors constitute the "stomatal disease triangle". The aim of this review is to highlight recent advances toward understanding the stomatal disease triangle in the context of newly discovered signaling molecules, hormone crosstalk, and consequent molecular changes that integrate pathogens and environmental sensing into stomatal immune responses. Future perspectives on emerging single-cell studies, multiomics and molecular imaging in the context of stomatal defense are discussed. Advances in this important area of plant biology will inform rational crop engineering and breeding for enhanced stomatal defense without disruption of other pathways that impact crop yield.
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Affiliation(s)
- Qingyuan Xiang
- Department of Biology, University of Florida Genetics Institute, Gainesville, FL, USA
| | - Aneirin A Lott
- Department of Biology, University of Florida Genetics Institute, Gainesville, FL, USA; Plant Molecular and Cellular Biology Program, University of Florida, FL, USA
| | - Sarah M Assmann
- Department of Biology, Pennsylvania State University, State College, PA, USA
| | - Sixue Chen
- Department of Biology, University of Florida Genetics Institute, Gainesville, FL, USA; Plant Molecular and Cellular Biology Program, University of Florida, FL, USA; Proteomics and Mass Spectrometry Facility, University of Florida, FL, USA.
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17
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Ma M, Wendehenne D, Philippot L, Hänsch R, Flemetakis E, Hu B, Rennenberg H. Physiological significance of pedospheric nitric oxide for root growth, development and organismic interactions. PLANT, CELL & ENVIRONMENT 2020; 43:2336-2354. [PMID: 32681574 DOI: 10.1111/pce.13850] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Revised: 07/12/2020] [Accepted: 07/13/2020] [Indexed: 06/11/2023]
Abstract
Nitric oxide (NO) is essential for plant growth and development, as well as interactions with abiotic and biotic environments. Its importance for multiple functions in plants means that tight regulation of NO concentrations is required. This is of particular significance in roots, where NO signalling is involved in processes, such as root growth, lateral root formation, nutrient acquisition, heavy metal homeostasis, symbiotic nitrogen fixation and root-mycorrhizal fungi interactions. The NO signal can also be produced in high levels by microbial processes in the rhizosphere, further impacting root processes. To explore these interesting interactions, in the present review, we firstly summarize current knowledge of physiological processes of NO production and consumption in roots and, thereafter, of processes involved in NO homeostasis in root cells with particular emphasis on root growth, development, nutrient acquisition, environmental stresses and organismic interactions.
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Affiliation(s)
- Ming Ma
- Center of Molecular Ecophysiology (CMEP), College of Resources and Environment, Southwest University, Chongqing, China
| | - David Wendehenne
- Université Bourgogne Franche-Comté, INRA, AgroSup Dijon, Dijon, France
| | - Laurent Philippot
- Université Bourgogne Franche-Comté, INRA, AgroSup Dijon, Dijon, France
| | - Robert Hänsch
- Center of Molecular Ecophysiology (CMEP), College of Resources and Environment, Southwest University, Chongqing, China
- Institute for Plant Biology, Technische Universität, Braunschweig, Germany
| | - Emmanouil Flemetakis
- Center of Molecular Ecophysiology (CMEP), College of Resources and Environment, Southwest University, Chongqing, China
- Laboratory of Molecular Biology, Department of Biotechnology, Agricultural University of Athens, Athens, Greece
| | - Bin Hu
- Center of Molecular Ecophysiology (CMEP), College of Resources and Environment, Southwest University, Chongqing, China
| | - Heinz Rennenberg
- Center of Molecular Ecophysiology (CMEP), College of Resources and Environment, Southwest University, Chongqing, China
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18
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Maheshwari P, Assmann SM, Albert R. A Guard Cell Abscisic Acid (ABA) Network Model That Captures the Stomatal Resting State. Front Physiol 2020; 11:927. [PMID: 32903539 PMCID: PMC7438572 DOI: 10.3389/fphys.2020.00927] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Accepted: 07/09/2020] [Indexed: 12/11/2022] Open
Abstract
Stomatal pores play a central role in the control of carbon assimilation and plant water status. The guard cell pair that borders each pore integrates information from environmental and endogenous signals and accordingly swells or deflates, thereby increasing or decreasing the stomatal aperture. Prior research shows that there is a complex cellular network underlying this process. We have previously constructed a signal transduction network and a Boolean dynamic model describing stomatal closure in response to signals including the plant hormone abscisic acid (ABA), calcium or reactive oxygen species (ROS). Here, we improve the Boolean network model such that it captures the biologically expected response of the guard cell in the absence or following the removal of a closure-inducing signal such as ABA or external Ca2+. The expectation from the biological system is reversibility, i.e., the stomata should reopen after the closing signal is removed. We find that the model's reversibility is obstructed by the previously assumed persistent activity of four nodes. By introducing time-dependent Boolean functions for these nodes, the model recapitulates stomatal reopening following the removal of a signal. The previous version of the model predicts ∼20% closure in the absence of any signal due to uncertainty regarding the initial conditions of multiple network nodes. We systematically test and adjust these initial conditions to find the minimally restrictive combinations that appropriately result in open stomata in the absence of a closure signal. We support these results by an analysis of the successive stabilization of feedback motifs in the network, illuminating the system's dynamic progression toward the open or closed stomata state. This analysis particularly highlights the role of cytosolic calcium oscillations in causing and maintaining stomatal closure. Overall, we illustrate the strength of the Boolean network modeling framework to efficiently capture cellular phenotypes as emergent outcomes of intracellular biological processes.
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Affiliation(s)
- Parul Maheshwari
- Department of Physics, Penn State University, University Park, PA, United States
| | - Sarah M Assmann
- Department of Biology, Penn State University, University Park, PA, United States
| | - Reka Albert
- Department of Physics, Penn State University, University Park, PA, United States.,Department of Biology, Penn State University, University Park, PA, United States
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19
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Staszek P, Gniazdowska A. Peroxynitrite induced signaling pathways in plant response to non-proteinogenic amino acids. PLANTA 2020; 252:5. [PMID: 32535658 PMCID: PMC7293691 DOI: 10.1007/s00425-020-03411-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Accepted: 06/06/2020] [Indexed: 05/02/2023]
Abstract
Nitro/oxidative modifications of proteins and RNA nitration resulted from altered peroxynitrite generation are elements of the indirect mode of action of canavanine and meta-tyrosine in plants Environmental conditions and stresses, including supplementation with toxic compounds, are known to impair reactive oxygen (ROS) and reactive nitrogen species (RNS) homeostasis, leading to modification in production of oxidized and nitrated derivatives. The role of nitrated and/or oxidized biotargets differs depending on the stress factors and developmental stage of plants. Canavanine (CAN) and meta-tyrosine (m-Tyr) are non-proteinogenic amino acids (NPAAs). CAN, the structural analog of arginine, is found mostly in seeds of Fabaceae species, as a storage form of nitrogen. In mammalian cells, CAN is used as an anticancer agent due to its inhibitory action on nitric oxide synthesis. m-Tyr is a structural analogue of phenylalanine and an allelochemical found in root exudates of fescues. In animals, m-Tyr is recognized as a marker of oxidative stress. Supplementation of plants with CAN or m-Tyr modify ROS and RNS metabolism. Over the last few years of our research, we have collected the complex data on ROS and RNS metabolism in tomato (Solanum lycopersicum L.) plants exposed to CAN or m-Tyr. In addition, we have shown the level of nitrated RNA (8-Nitro-guanine) in roots of seedlings, stressed by the tested NPAAs. In this review, we describe the model of CAN and m-Tyr mode of action in plants based on modifications of signaling pathways induced by ROS/RNS with a special focus on peroxynitrite induced RNA and protein modifications.
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Affiliation(s)
- Pawel Staszek
- Department of Plant Physiology, Institute of Biology, Warsaw University of Life Sciences-SGGW, Nowoursynowska 159, 02-776, Warsaw, Poland.
| | - Agnieszka Gniazdowska
- Department of Plant Physiology, Institute of Biology, Warsaw University of Life Sciences-SGGW, Nowoursynowska 159, 02-776, Warsaw, Poland
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20
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Chen S, Jia H, Wang X, Shi C, Wang X, Ma P, Wang J, Ren M, Li J. Hydrogen Sulfide Positively Regulates Abscisic Acid Signaling through Persulfidation of SnRK2.6 in Guard Cells. MOLECULAR PLANT 2020; 13:732-744. [PMID: 31958520 DOI: 10.1016/j.molp.2020.01.004] [Citation(s) in RCA: 113] [Impact Index Per Article: 28.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2019] [Revised: 11/09/2019] [Accepted: 01/13/2020] [Indexed: 05/20/2023]
Abstract
The phytohormone abscisic acid (ABA) plays pivotal roles in triggering stomatal closure and facilitating adaptation of plants to drought stress. Hydrogen sulfide (H2S), a small signaling gas molecule, is involved in ABA-dependent stomatal closure. However, how H2S regulates ABA signaling remains largely unclear. Here, we show that ABA induces the production of H2S catalyzed by L-CYSTEINE DESULFHYDRASE1 (DES1) in guard cells, and H2S in turn positively regulates ABA signaling through persulfidation of Open Stomata 1 (OST1)/SNF1-RELATED PROTEIN KINASE2.6 (SnRK2.6). Two cysteine (Cys) sites, Cys131 and Cys137, which are exposed on the surface of SnRK2.6 and close to the activation loop, were identified to be persulfidated, which promotes the activity of SnRK2.6 and its interaction with ABA response element-binding factor 2 (ABF2), a transcription factor acting downstream of ABA signaling. When Cys131, Cys137, or both residues in SnRK2.6 were substituted with serine (S), H2S-induced SnRK2.6 activity and SnRK2.6-ABF2 interaction were partially (SnRK2.6C131S and SnRK2.6C137S) or completely (SnRK2.6C131SC137S) compromised. Introduction of SnRK2.6C131S, SnRK2.6C137S, or SnRK2.6C131SC137S into the ost1-3 mutant could not rescue the mutant phenotype: less sensitivity to ABA- and H2S-induced stomatal closure and Ca2+ influx as well as increased water loss and decreased drought tolerance. Taken together, our study reveals a novel post-translational regulatory mechanism of ABA signaling whereby H2S persulfidates SnRK2.6 to promote ABA signaling and ABA-induced stomatal closure.
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Affiliation(s)
- Sisi Chen
- Biomass Energy Center for Arid and Semi-arid Lands, College of Life Sciences, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Honglei Jia
- School of Environmental Science and Engineering, Shaanxi University of Science & Technology, Xi'an, Shaanxi 710021, China
| | - Xiaofeng Wang
- Biomass Energy Center for Arid and Semi-arid Lands, College of Life Sciences, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Cong Shi
- Biomass Energy Center for Arid and Semi-arid Lands, College of Life Sciences, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Xiao Wang
- School of Environmental Science and Engineering, Shaanxi University of Science & Technology, Xi'an, Shaanxi 710021, China
| | - Peiyun Ma
- School of Environmental Science and Engineering, Shaanxi University of Science & Technology, Xi'an, Shaanxi 710021, China
| | - Juan Wang
- Biomass Energy Center for Arid and Semi-arid Lands, College of Life Sciences, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Meijuan Ren
- Biomass Energy Center for Arid and Semi-arid Lands, College of Life Sciences, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Jisheng Li
- Biomass Energy Center for Arid and Semi-arid Lands, College of Life Sciences, Northwest A&F University, Yangling, Shaanxi 712100, China.
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21
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Jannat R, Senba T, Muroyama D, Uraji M, Hossain MA, Islam MM, Nakamura Y, Munemasa S, Mori IC, Murata Y. Interaction of intracellular hydrogen peroxide accumulation with nitric oxide production in abscisic acid signaling in guard cells. Biosci Biotechnol Biochem 2020; 84:1418-1426. [PMID: 32200704 DOI: 10.1080/09168451.2020.1743168] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Reactive oxygen species and nitric oxide (NO•) concomitantly play essential roles in guard cell signaling. Studies using catalase mutants have revealed that the inducible and constitutive elevations of intracellular hydrogen peroxide (H2O2) have different roles: only the inducible H2O2 production transduces the abscisic acid (ABA) signal leading stomatal closure. However, the involvement of inducible or constitutive NO• productions, if exists, in this process remains unknown. We studied H2O2 and NO• mobilization in guard cells of catalase mutants. Constitutive H2O2 level was higher in the mutants than that in wild type, but constitutive NO• level was not different among lines. Induced NO• and H2O2 levels elicited by ABA showed a high correlation with each other in all lines. Furthermore, NO• levels increased by exogenous H2O2 also showed a high correlation with stomatal aperture size. Our results demonstrate that ABA-induced intracellular H2O2 accumulation triggers NO• production leading stomatal closure. ABBREVIATIONS ABA: abscisic acid; CAT: catalase; cGMP: cyclic guanosine monophosphate; DAF-2DA: 4,5-diaminofluorescein-2 diacetate; H2DCF-DA: 2',7'-dichlorodihydrofluorescein diacetate; MeJA: methyljasmonate; NOS: nitric oxide synthetase; NR: nitrate reductase; POX: peroxidase; ROS: reactive oxygen species; SNAP: S-nitroso-N-acetyl-DL-penicillamine; SNP: sodium nitroprusside; NOX: NADP(H) oxidase.
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Affiliation(s)
- Rayhanur Jannat
- Graduate School of Environmental and Life Science, Okayama University , Okayama, Japan
| | - Takanori Senba
- Graduate School of Environmental and Life Science, Okayama University , Okayama, Japan
| | - Daichi Muroyama
- Graduate School of Environmental and Life Science, Okayama University , Okayama, Japan
| | - Misugi Uraji
- Graduate School of Environmental and Life Science, Okayama University , Okayama, Japan
| | | | | | - Yoshimasa Nakamura
- Graduate School of Environmental and Life Science, Okayama University , Okayama, Japan
| | - Shintaro Munemasa
- Graduate School of Environmental and Life Science, Okayama University , Okayama, Japan
| | - Izumi C Mori
- Institute of Plant Science and Resources, Okayama University , Kurashiki, Japan
| | - Yoshiyuki Murata
- Graduate School of Environmental and Life Science, Okayama University , Okayama, Japan
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22
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Rahman H, Wang XY, Xu YP, He YH, Cai XZ. Characterization of tomato protein kinases embedding guanylate cyclase catalytic center motif. Sci Rep 2020; 10:4078. [PMID: 32139792 PMCID: PMC7057975 DOI: 10.1038/s41598-020-61000-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2019] [Accepted: 02/19/2020] [Indexed: 11/09/2022] Open
Abstract
Guanylate cyclases (GCs) are enzymes that catalyze the reaction to produce cyclic GMP (cGMP), a key signaling molecule in eukaryotes. Nevertheless, systemic identification and functional analysis of GCs in crop plant species have not yet been conducted. In this study, we systematically identified GC genes in the economically important crop tomato (Solanum lycopersicum L.) and analyzed function of two putative tomato GC genes in disease resistance. Ninety-nine candidate GCs containing GC catalytic center (GC-CC) motif were identified in tomato genome. Intriguingly, all of them were putative protein kinases embedding a GC-CC motif within the protein kinase domain, which was thus tentatively named as GC-kinases here. Two homologs of Arabidopsis PEPRs, SlGC17 and SlGC18 exhibited in vitro GC activity. Co-silencing of SlGC17 and SlGC18 genes significantly reduced resistance to tobacco rattle virus, fungus Sclerotinia sclerotiorum, and bacterium Pseudomonas syringae pv. tomato (Pst) DC3000. Moreover, co-silencing of these two genes attenuated PAMP and DAMP-triggered immunity as shown by obvious decrease of flg22, chitin and AtPep1-elicited Ca2+ and H2O2 burst in SlGC-silenced plants. Additionally, silencing of these genes altered the expression of a set of Ca2+ signaling genes. Furthermore, co-silencing of these GC-kinase genes exhibited stronger effects on all above regulations in comparison with individual silencing. Collectively, our results suggest that GC-kinases might widely exist in tomato and the two SlPEPR-GC genes redundantly play a positive role in resistance to diverse pathogens and PAMP/DAMP-triggered immunity in tomato. Our results provide insights into composition and functions of GC-kinases in tomato.
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Affiliation(s)
- Hafizur Rahman
- Institute of Biotechnology, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, 310058, China
| | - Xin-Yao Wang
- Institute of Biotechnology, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, 310058, China
| | - You-Ping Xu
- Center of Analysis and Measurement, Zhejiang University, Hangzhou, 310058, China
| | - Yu-Han He
- Institute of Biotechnology, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, 310058, China
| | - Xin-Zhong Cai
- Institute of Biotechnology, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, 310058, China.
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23
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de Sousa LF, de Menezes-Silva PE, Lourenço LL, Galmés J, Guimarães AC, da Silva AF, Dos Reis Lima AP, Henning LMM, Costa AC, Silva FG, Farnese FDS. Improving water use efficiency by changing hydraulic and stomatal characteristics in soybean exposed to drought: the involvement of nitric oxide. PHYSIOLOGIA PLANTARUM 2020; 168:576-589. [PMID: 31102278 DOI: 10.1111/ppl.12983] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Revised: 05/12/2019] [Accepted: 05/13/2019] [Indexed: 06/09/2023]
Abstract
A variety of cellular responses is needed to ensure the plants survival during drought, but little is known about the signaling mechanisms involved in this process. Soybean cultivars (EMBRAPA 48 and BR 16, tolerant and sensitive to drought, respectively) were exposed to the following treatments: control conditions (plants in field capacity), drought (20% of available water in the soil), sodium nitroprusside (SNP) treatment (plants irrigated and treated with 100-µM SNP [SNP-nitric oxide (NO) donor molecule], and Drought + SNP (plants subjected to drought and SNP treatment). Plants remained in these conditions until the reproductive stage and were evaluated for physiological (photosynthetic pigments, chlorophyll a fluorescence and gas exchange rates), hydraulic (water potential, osmotic potential and leaf hydraulic conductivity) and morpho-anatomical traits (biomass, venation density and stomatal characterization). Exposure to water deficit considerably reduced water potential in both cultivars and resulted in decrease in photosynthesis and biomass accumulation. The addition of the NO donor attenuated these damaging effects of water deficit and increased the tolerance index of both cultivars. The results showed that NO was able to reduce plant's water loss, while maintaining their biomass production through alteration in stomatal characteristics, hydraulic conductivity and the biomass distribution pattern. These hydraulic and morpho-anatomical alterations allowed the plants to obtain, transport and lose less water to the atmosphere, even in water deficit conditions.
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Affiliation(s)
| | | | | | - Jeroni Galmés
- Departament de Biologia, Universitat de les Illes Balears, Balears, Spain
| | | | | | | | | | - Alan C Costa
- Department of Biology, Instituto Federal Goiano, Goiás, Brazil
| | - Fabiano G Silva
- Department of Biology, Instituto Federal Goiano, Goiás, Brazil
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Petřivalský M, Luhová L. Nitrated Nucleotides: New Players in Signaling Pathways of Reactive Nitrogen and Oxygen Species in Plants. FRONTIERS IN PLANT SCIENCE 2020; 11:598. [PMID: 32508862 PMCID: PMC7248558 DOI: 10.3389/fpls.2020.00598] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Accepted: 04/20/2020] [Indexed: 05/03/2023]
Abstract
Nitration of diverse biomolecules, including proteins, lipids and nucleic acid, by reactive nitrogen species represents one of the key mechanisms mediating nitric oxide (NO) biological activity across all types of organisms. 8-nitroguanosine 3'5'-cyclic monophosphate (8-nitro-cGMP) has been described as a unique electrophilic intermediate involved in intracellular redox signaling. In animal cells, 8-nitro-cGMP is formed from guanosine-5'-triphosphate by a combined action of reactive nitrogen (RNS) and oxygen species (ROS) and guanylate cyclase. As demonstrated originally in animal models, 8-nitro-cGMP shows certain biological activities closely resembling its analog cGMP; however, its regulatory functions are mediated mainly by its electrophilic properties and chemical interactions with protein thiols resulting in a novel protein post-translational modification termed S-guanylation. In Arabidopsis thaliana, 8-nitro-cGMP was reported to mediate NO-dependent signaling pathways controlling abscisic acid (ABA)-induced stomatal closure, however, its derivative 8-mercapto-cGMP (8-SH-cGMP) was later shown as the active component of hydrogen sulfide (H2S)-mediated guard cell signaling. Here we present a survey of current knowledge on biosynthesis, metabolism and biological activities of nitrated nucleotides with special attention to described and proposed functions of 8-nitro-cGMP and its metabolites in plant physiology and stress responses.
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Shen Q, Zhan X, Yang P, Li J, Chen J, Tang B, Wang X, Hong Y. Dual Activities of Plant cGMP-Dependent Protein Kinase and Its Roles in Gibberellin Signaling and Salt Stress. THE PLANT CELL 2019; 31:3073-3091. [PMID: 31575723 PMCID: PMC6925016 DOI: 10.1105/tpc.19.00510] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Revised: 09/04/2019] [Accepted: 09/28/2019] [Indexed: 05/03/2023]
Abstract
Cyclic GMP (cGMP) is an important regulator in eukaryotes, and cGMP-dependent protein kinase (PKG) plays a key role in perceiving cellular cGMP in diverse physiological processes in animals. However, the molecular identity, property, and function of PKG in plants remain elusive. In this study, we have identified PKG from plants and characterized its role in mediating the gibberellin (GA) response in rice (Oryza sativa). PKGs from plants are structurally unique with an additional type 2C protein phosphatase domain. Rice PKG possesses both protein kinase and phosphatase activities, and cGMP stimulates its kinase activity but inhibits its phosphatase activity. One of PKG's targets is GAMYB, a transcription factor in GA signaling, and the dual activities of PKG catalyze the reversible phosphorylation of GAMYB at Ser6 and modulate the nucleocytoplasmic distribution of GAMYB in response to GA. Loss of PKG impeded the nuclear localization of GAMYB and abolished GAMYB function in the GA response, leading to defects in GA-induced seed germination, internode elongation, and pollen viability. In addition to GAMYB, PKG has multiple potential targets and thus has broad effects, particularly in the salt stress response.
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Affiliation(s)
- Qingwen Shen
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China
| | - Xinqiao Zhan
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China
| | - Pei Yang
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China
| | - Jing Li
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China
| | - Jie Chen
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China
| | - Bing Tang
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China
| | - Xuemin Wang
- Department of Biology, University of Missouri, St. Louis, Missouri 63121
- Donald Danforth Plant Science Center, St. Louis, Missouri 63132
| | - Yueyun Hong
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China
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26
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A forty year journey: The generation and roles of NO in plants. Nitric Oxide 2019; 93:53-70. [DOI: 10.1016/j.niox.2019.09.006] [Citation(s) in RCA: 119] [Impact Index Per Article: 23.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2019] [Revised: 08/28/2019] [Accepted: 09/16/2019] [Indexed: 02/07/2023]
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Maheshwari P, Du H, Sheen J, Assmann SM, Albert R. Model-driven discovery of calcium-related protein-phosphatase inhibition in plant guard cell signaling. PLoS Comput Biol 2019; 15:e1007429. [PMID: 31658257 PMCID: PMC6837631 DOI: 10.1371/journal.pcbi.1007429] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Revised: 11/07/2019] [Accepted: 09/21/2019] [Indexed: 11/19/2022] Open
Abstract
The plant hormone abscisic acid (ABA) promotes stomatal closure via multifarious cellular signaling cascades. Our previous comprehensive reconstruction of the stomatal closure network resulted in an 81-node network with 153 edges. Discrete dynamic modeling utilizing this network reproduced over 75% of experimental observations but a few experimentally supported results were not recapitulated. Here we identify predictions that improve the agreement between model and experiment. We performed dynamics-preserving network reduction, resulting in a condensed 49 node and 113 edge stomatal closure network that preserved all dynamics-determining network motifs and reproduced the predictions of the original model. We then utilized the reduced network to explore cases in which experimental activation of internal nodes in the absence of ABA elicited stomatal closure in wet bench experiments, but not in our in silico model. Our simulations revealed that addition of a single edge, which allows indirect inhibition of any one of three PP2C protein phosphatases (ABI2, PP2CA, HAB1) by cytosolic Ca2+ elevation, resolves the majority of the discrepancies. Consistent with this hypothesis, we experimentally show that Ca2+ application to cellular lysates at physiological concentrations inhibits PP2C activity. The model augmented with this new edge provides new insights into the role of cytosolic Ca2+ oscillations in stomatal closure, revealing a mutual reinforcement between repeated increases in cytosolic Ca2+ concentration and a self-sustaining feedback circuit inside the signaling network. These results illustrate how iteration between model and experiment can improve predictions of highly complex cellular dynamics.
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Affiliation(s)
- Parul Maheshwari
- Department of Physics, Penn State University, University Park, Pennsylvania, United States of America
| | - Hao Du
- Department of Molecular Biology and Centre for Computational and Integrative Biology, Massachusetts General Hospital, and Department of Genetics, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Jen Sheen
- Department of Molecular Biology and Centre for Computational and Integrative Biology, Massachusetts General Hospital, and Department of Genetics, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Sarah M. Assmann
- Biology Department, Penn State University, University Park, Pennsylvania, United States of America
| | - Reka Albert
- Department of Physics, Penn State University, University Park, Pennsylvania, United States of America
- Biology Department, Penn State University, University Park, Pennsylvania, United States of America
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Sánchez-Vicente I, Fernández-Espinosa MG, Lorenzo O. Nitric oxide molecular targets: reprogramming plant development upon stress. JOURNAL OF EXPERIMENTAL BOTANY 2019; 70:4441-4460. [PMID: 31327004 PMCID: PMC6736187 DOI: 10.1093/jxb/erz339] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Accepted: 07/18/2019] [Indexed: 05/09/2023]
Abstract
Plants are sessile organisms that need to complete their life cycle by the integration of different abiotic and biotic environmental signals, tailoring developmental cues and defense concomitantly. Commonly, stress responses are detrimental to plant growth and, despite the fact that intensive efforts have been made to understand both plant development and defense separately, most of the molecular basis of this trade-off remains elusive. To cope with such a diverse range of processes, plants have developed several strategies including the precise balance of key plant growth and stress regulators [i.e. phytohormones, reactive nitrogen species (RNS), and reactive oxygen species (ROS)]. Among RNS, nitric oxide (NO) is a ubiquitous gasotransmitter involved in redox homeostasis that regulates specific checkpoints to control the switch between development and stress, mainly by post-translational protein modifications comprising S-nitrosation of cysteine residues and metals, and nitration of tyrosine residues. In this review, we have sought to compile those known NO molecular targets able to balance the crossroads between plant development and stress, with special emphasis on the metabolism, perception, and signaling of the phytohormones abscisic acid and salicylic acid during abiotic and biotic stress responses.
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Affiliation(s)
- Inmaculada Sánchez-Vicente
- Departamento de Botánica y Fisiología Vegetal, Instituto Hispano-Luso de Investigaciones Agrarias (CIALE), Facultad de Biología, Universidad de Salamanca, C/ Río Duero 12, 37185 Salamanca, Spain
| | - María Guadalupe Fernández-Espinosa
- Departamento de Botánica y Fisiología Vegetal, Instituto Hispano-Luso de Investigaciones Agrarias (CIALE), Facultad de Biología, Universidad de Salamanca, C/ Río Duero 12, 37185 Salamanca, Spain
| | - Oscar Lorenzo
- Departamento de Botánica y Fisiología Vegetal, Instituto Hispano-Luso de Investigaciones Agrarias (CIALE), Facultad de Biología, Universidad de Salamanca, C/ Río Duero 12, 37185 Salamanca, Spain
- Correspondence:
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Arasimowicz-Jelonek M, Floryszak-Wieczorek J. A physiological perspective on targets of nitration in NO-based signaling networks in plants. JOURNAL OF EXPERIMENTAL BOTANY 2019; 70:4379-4389. [PMID: 31340379 DOI: 10.1093/jxb/erz300] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2018] [Accepted: 07/10/2019] [Indexed: 05/17/2023]
Abstract
Although peroxynitrite (ONOO-) has been well documented as a nitrating cognate of nitric oxide (NO) in plant cells, modifications of proteins, fatty acids, and nucleotides by nitration are relatively under-explored topics in plant NO research. As a result, they are seen mainly as hallmarks of redox processes or as markers of nitro-oxidative stress under unfavorable conditions, similar to those observed in human and other animal systems. Protein tyrosine nitration is the best-known nitrative modification in the plant system and can be promoted by the action of both ONOO- and related NO-derived oxidants within the cell environment. Recent progress in 'omics' and modeling tools have provided novel biochemical insights into the physiological and pathophysiological fate of nitrated proteins. The nitration process can be specifically involved in various cell regulatory mechanisms that control redox signaling via nitrated cGMP or nitrated fatty acids. In addition, there is evidence to suggest that nitrative modifications of nucleotides embedded in DNA and RNA can be considered as smart switches of gene expression that fine-tune adaptive cellular responses to stress. This review highlights recent advances in our understanding of the potential implications of biotargets in the regulation of intracellular traffic and plant biological processes.
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Affiliation(s)
- Magdalena Arasimowicz-Jelonek
- Department of Plant Ecophysiology, Faculty of Biology, Adam Mickiewicz University in Poznan, Uniwersytetu Poznanskiego, Poznan, Poland
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30
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Isner JC, Olteanu VA, Hetherington AJ, Coupel-Ledru A, Sun P, Pridgeon AJ, Jones GS, Oates M, Williams TA, Maathuis FJM, Kift R, Webb AR, Gough J, Franklin KA, Hetherington AM. Short- and Long-Term Effects of UVA on Arabidopsis Are Mediated by a Novel cGMP Phosphodiesterase. Curr Biol 2019; 29:2580-2585.e4. [PMID: 31353185 PMCID: PMC6692503 DOI: 10.1016/j.cub.2019.06.071] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2019] [Revised: 06/05/2019] [Accepted: 06/24/2019] [Indexed: 12/21/2022]
Abstract
Although UVA radiation (315-400 nm) represents 95% of the UV radiation reaching the earth's surface, surprisingly little is known about its effects on plants [1]. We show that in Arabidopsis, short-term exposure to UVA inhibits the opening of stomata, and this requires a reduction in the cytosolic level of cGMP. This process is independent of UVR8, the UVB receptor. A cGMP-activated phosphodiesterase (AtCN-PDE1) was responsible for the UVA-induced decrease in cGMP in Arabidopsis. AtCN-PDE1-like proteins form a clade within the large HD-domain/PDEase-like protein superfamily, but no eukaryotic members of this subfamily have been functionally characterized. These genes have been lost from the genomes of metazoans but are otherwise conserved as single-copy genes across the tree of life. In longer-term experiments, UVA radiation increased growth and decreased water-use efficiency. These experiments revealed that PDE1 is also a negative regulator of growth. As the PDE1 gene is ancient and not represented in animal lineages, it is likely that at least one element of cGMP signaling in plants has evolved differently to the system present in metazoans.
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Affiliation(s)
- Jean-Charles Isner
- School of Biological Sciences, Life Sciences Building, University of Bristol, 24 Tyndall Avenue, Bristol BS8 1TH, UK
| | - Vlad-Aris Olteanu
- Department of Computer Science, Merchant Venturers Building, University of Bristol, Woodland Road, Bristol BS8 1UB, UK
| | | | - Aude Coupel-Ledru
- School of Biological Sciences, Life Sciences Building, University of Bristol, 24 Tyndall Avenue, Bristol BS8 1TH, UK
| | - Peng Sun
- School of Biological Sciences, Life Sciences Building, University of Bristol, 24 Tyndall Avenue, Bristol BS8 1TH, UK
| | - Ashley J Pridgeon
- School of Biological Sciences, Life Sciences Building, University of Bristol, 24 Tyndall Avenue, Bristol BS8 1TH, UK
| | - Glyndyr S Jones
- School of Biological Sciences, Life Sciences Building, University of Bristol, 24 Tyndall Avenue, Bristol BS8 1TH, UK
| | - Matthew Oates
- Department of Computer Science, Merchant Venturers Building, University of Bristol, Woodland Road, Bristol BS8 1UB, UK
| | - Tom A Williams
- School of Biological Sciences, Life Sciences Building, University of Bristol, 24 Tyndall Avenue, Bristol BS8 1TH, UK
| | | | - Richard Kift
- School of Earth and Environmental Sciences, University of Manchester, Simon Building, Oxford Road, Manchester M13 9PL, UK
| | - Ann R Webb
- School of Earth and Environmental Sciences, University of Manchester, Simon Building, Oxford Road, Manchester M13 9PL, UK
| | - Julian Gough
- MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge Biomedical Campus, Cambridge CB2 0QU, UK
| | - Keara A Franklin
- School of Biological Sciences, Life Sciences Building, University of Bristol, 24 Tyndall Avenue, Bristol BS8 1TH, UK
| | - Alistair M Hetherington
- School of Biological Sciences, Life Sciences Building, University of Bristol, 24 Tyndall Avenue, Bristol BS8 1TH, UK.
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Discovery of a Nitric Oxide-Responsive Protein in Arabidopsis thaliana. Molecules 2019; 24:molecules24152691. [PMID: 31344907 PMCID: PMC6696476 DOI: 10.3390/molecules24152691] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2019] [Revised: 07/20/2019] [Accepted: 07/22/2019] [Indexed: 11/17/2022] Open
Abstract
In plants, much like in animals, nitric oxide (NO) has been established as an important gaseous signaling molecule. However, contrary to animal systems, NO-sensitive or NO-responsive proteins that bind NO in the form of a sensor or participating in redox reactions have remained elusive. Here, we applied a search term constructed based on conserved and functionally annotated amino acids at the centers of Heme Nitric Oxide/Oxygen (H-NOX) domains in annotated and experimentally-tested gas-binding proteins from lower and higher eukaryotes, in order to identify candidate NO-binding proteins in Arabidopsis thaliana. The selection of candidate NO-binding proteins identified from the motif search was supported by structural modeling. This approach identified AtLRB3 (At4g01160), a member of the Light Response Bric-a-Brac/Tramtrack/Broad Complex (BTB) family, as a candidate NO-binding protein. AtLRB3 was heterologously expressed and purified, and then tested for NO-response. Spectroscopic data confirmed that AtLRB3 contains a histidine-ligated heme cofactor and importantly, the addition of NO to AtLRB3 yielded absorption characteristics reminiscent of canonical H-NOX proteins. Furthermore, substitution of the heme iron-coordinating histidine at the H-NOX center with a leucine strongly impaired the NO-response. Our finding therefore established AtLRB3 as a NO-interacting protein and future characterizations will focus on resolving the nature of this response.
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Fukudome M, Watanabe E, Osuki KI, Uchi N, Uchiumi T. Ectopic or Over-Expression of Class 1 Phytoglobin Genes Confers Flooding Tolerance to the Root Nodules of Lotus japonicus by Scavenging Nitric Oxide. Antioxidants (Basel) 2019; 8:antiox8070206. [PMID: 31277471 PMCID: PMC6681080 DOI: 10.3390/antiox8070206] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2019] [Revised: 06/28/2019] [Accepted: 07/02/2019] [Indexed: 12/25/2022] Open
Abstract
Flooding limits biomass production in agriculture. Leguminous plants, important agricultural crops, use atmospheric dinitrogen gas as nitrogen nutrition by symbiotic nitrogen fixation with rhizobia, but this root-nodule symbiosis is sometimes broken down by flooding of the root system. In this study, we analyzed the effect of flooding on the symbiotic system of transgenic Lotus japonicus lines which overexpressed class 1 phytoglobin (Glb1) of L. japonicus (LjGlb1-1) or ectopically expressed that of Alnus firma (AfGlb1). In the roots of wild-type plants, flooding increased nitric oxide (NO) level and expression of senescence-related genes and decreased nitrogenase activity; in the roots of transgenic lines, these effects were absent or less pronounced. The decrease of chlorophyll content in leaves and the increase of reactive oxygen species (ROS) in roots and leaves caused by flooding were also suppressed in these lines. These results suggest that increased levels of Glb1 help maintain nodule symbiosis under flooding by scavenging NO and controlling ROS.
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Affiliation(s)
- Mitsutaka Fukudome
- Graduate School of Science and Engineering, Kagoshima University, 1-21-35 Korimoto, Kagoshima 890-0065, Japan
| | - Eri Watanabe
- Graduate School of Science and Engineering, Kagoshima University, 1-21-35 Korimoto, Kagoshima 890-0065, Japan
| | - Ken-Ichi Osuki
- Graduate School of Science and Engineering, Kagoshima University, 1-21-35 Korimoto, Kagoshima 890-0065, Japan
| | - Nahoko Uchi
- Graduate School of Science and Engineering, Kagoshima University, 1-21-35 Korimoto, Kagoshima 890-0065, Japan
| | - Toshiki Uchiumi
- Graduate School of Science and Engineering, Kagoshima University, 1-21-35 Korimoto, Kagoshima 890-0065, Japan.
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Iwai S, Ogata S, Yamada N, Onjo M, Sonoike K, Shimazaki K. Guard cell photosynthesis is crucial in abscisic acid-induced stomatal closure. PLANT DIRECT 2019; 3:e00137. [PMID: 31245777 PMCID: PMC6589527 DOI: 10.1002/pld3.137] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2018] [Revised: 03/29/2019] [Accepted: 04/06/2019] [Indexed: 05/03/2023]
Abstract
Reactive oxygen species (ROS) are ubiquitous signaling molecules involved in diverse physiological processes, including stomatal closure. Photosynthetic electron transport (PET) is the main source of ROS generation in plants, but whether it functions in guard cell signaling remains unclear. Here, we assessed whether PET functions in abscisic acid (ABA) signaling in guard cells. ABA-elicited ROS were localized to guard cell chloroplasts in Arabidopsis thaliana, Commelina benghalensis, and Vicia faba in the light and abolished by the PET inhibitors 3-(3, 4-dichlorophenyl)-1, 1-dimethylurea and 2, 5-dibromo-3-methyl-6-isopropyl-p-benzoquinone. These inhibitors reduced ABA-induced stomatal closure in all three species, as well as in the NADPH oxidase-lacking mutant atrboh D/F. However, an NADPH oxidase inhibitor did not fully eliminate ABA-induced ROS in the chloroplasts, and ABA-induced ROS were still observed in the guard cell chloroplasts of atrboh D/F. This study demonstrates that ROS generated through PET act as signaling molecules in ABA-induced stomatal closure and that this occurs in concert with ROS derived through NADPH oxidase.
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Affiliation(s)
- Sumio Iwai
- Department of Horticultural ScienceFaculty of AgricultureKagoshima UniversityKagoshimaJapan
- Kagoshima University Experimental FarmKagoshimaJapan
| | - Sho Ogata
- Department of Horticultural ScienceFaculty of AgricultureKagoshima UniversityKagoshimaJapan
| | - Naotaka Yamada
- Department of Bioscience and BiotechnologyFaculty of AgricultureKyushu UniversityFukuokaJapan
| | - Michio Onjo
- Kagoshima University Experimental FarmKagoshimaJapan
| | - Kintake Sonoike
- Faculty of Education and Integrated Arts and SciencesWaseda UniversityTokyoJapan
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Agurla S, Gahir S, Munemasa S, Murata Y, Raghavendra AS. Mechanism of Stomatal Closure in Plants Exposed to Drought and Cold Stress. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2019; 1081:215-232. [PMID: 30288712 DOI: 10.1007/978-981-13-1244-1_12] [Citation(s) in RCA: 87] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Drought is one of the abiotic stresses which impairs the plant growth/development and restricts the yield of many crops throughout the world. Stomatal closure is a common adaptation response of plants to the onset of drought condition. Stomata are microscopic pores on the leaf epidermis, which regulate the transpiration/CO2 uptake by leaves. Stomatal guard cells can sense various abiotic and biotic stress stimuli from the internal and external environment and respond quickly to initiate closure under unfavorable conditions. Stomata also limit the entry of pathogens into leaves, restricting their invasion. Drought is accompanied by the production and/or mobilization of the phytohormone, abscisic acid (ABA), which is well-known for its ability to induce stomatal closure. Apart from the ABA, various other factors that accumulate during drought and affect the stomatal function are plant hormones (auxins, MJ, ethylene, brassinosteroids, and cytokinins), microbial elicitors (salicylic acid, harpin, Flg 22, and chitosan), and polyamines . The role of various signaling components/secondary messengers during stomatal opening or closure has been a matter of intense investigation. Reactive oxygen species (ROS) , nitric oxide (NO) , cytosolic pH, and calcium are some of the well-documented signaling components during stomatal closure. The interrelationship and interactions of these signaling components such as ROS, NO, cytosolic pH, and free Ca2+ are quite complex and need further detailed examination.Low temperatures can have deleterious effects on plants. However, plants evolved protection mechanisms to overcome the impact of this stress. Cold temperature inhibits stomatal opening and causes stomatal closure. Cold-acclimated plants often exhibit marked changes in their lipid composition, particularly of the membranes. Cold stress often leads to the accumulation of ABA, besides osmolytes such as glycine betaine and proline. The role of signaling components such as ROS, NO, and Ca2+ during cold acclimation is yet to be established, though the effects of cold stress on plant growth and development are studied extensively. The information on the mitigation processes is quite limited. We have attempted to describe consequences of drought and cold stress in plants, emphasizing stomatal closure. Several of these factors trigger signaling components in roots, shoots, and atmosphere, all leading to stomatal closure. A scheme is presented to show the possible signaling events and their convergence and divergence of action during stomatal closure. The possible directions for future research are discussed.
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Affiliation(s)
- Srinivas Agurla
- Department of Plant Sciences, School of Life Sciences, University of Hyderabad, Hyderabad, India
| | - Shashibhushan Gahir
- Department of Plant Sciences, School of Life Sciences, University of Hyderabad, Hyderabad, India
| | - Shintaro Munemasa
- Graduate School of Environmental and Life Science, Okayama University, Okayama, Japan
| | - Yoshiyuki Murata
- Graduate School of Environmental and Life Science, Okayama University, Okayama, Japan.
| | - Agepati S Raghavendra
- Department of Plant Sciences, School of Life Sciences, University of Hyderabad, Hyderabad, India.
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35
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Clark G, Roux SJ. Role of Ca 2+ in Mediating Plant Responses to Extracellular ATP and ADP. Int J Mol Sci 2018; 19:E3590. [PMID: 30441766 PMCID: PMC6274673 DOI: 10.3390/ijms19113590] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2018] [Accepted: 11/08/2018] [Indexed: 12/30/2022] Open
Abstract
Among the most recently discovered chemical regulators of plant growth and development are extracellular nucleotides, especially extracellular ATP (eATP) and extracellular ADP (eADP). Plant cells release ATP into their extracellular matrix under a variety of different circumstances, and this eATP can then function as an agonist that binds to a specific receptor and induces signaling changes, the earliest of which is an increase in the concentration of cytosolic calcium ([Ca2+]cyt). This initial change is then amplified into downstream-signaling changes that include increased levels of reactive oxygen species and nitric oxide, which ultimately lead to major changes in the growth rate, defense responses, and leaf stomatal apertures of plants. This review presents and discusses the evidence that links receptor activation to increased [Ca2+]cyt and, ultimately, to growth and diverse adaptive changes in plant development. It also discusses the evidence that increased [Ca2+]cyt also enhances the activity of apyrase (nucleoside triphosphate diphosphohydrolase) enzymes that function in multiple subcellular locales to hydrolyze ATP and ADP, and thus limit or terminate the effects of these potent regulators.
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Affiliation(s)
- Greg Clark
- Department of Molecular Biosciences, University of Texas, Austin, TX 78712, USA.
| | - Stanley J Roux
- Department of Molecular Biosciences, University of Texas, Austin, TX 78712, USA.
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36
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Watanabe S, Sato M, Sawada Y, Tanaka M, Matsui A, Kanno Y, Hirai MY, Seki M, Sakamoto A, Seo M. Arabidopsis molybdenum cofactor sulfurase ABA3 contributes to anthocyanin accumulation and oxidative stress tolerance in ABA-dependent and independent ways. Sci Rep 2018; 8:16592. [PMID: 30413758 PMCID: PMC6226459 DOI: 10.1038/s41598-018-34862-1] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2018] [Accepted: 10/18/2018] [Indexed: 01/05/2023] Open
Abstract
Arabidopsis ABA3 is an enzyme involved in the synthesis of the sulfurated form of the molybdenum (Mo) cofactor (MoCo), which is required for the enzymatic activity of so-called Mo enzymes such as aldehyde oxidase (AO) and xanthine dehydrogenase (XDH). It has been reported that AO and XDH are essential for the biosynthesis of the bioactive compounds, ABA and allantoin, respectively. However, aba3 mutants often exhibit pleiotropic phenotypes that are not explained by defects in ABA and/or allantoin biosynthesis, leading us to hypothesize that ABA3 regulates additional metabolic pathways. To reveal the currently unidentified functions of ABA3 we compared transcriptome and metabolome of the Arabidopsis aba3 mutant with those of wild type and a typical ABA-deficient mutant aba2. We found that endogenous levels of anthocyanins, members of the flavonoid group, were significantly lower in the aba3 mutant than in the wild type or the aba2 mutant under oxidative stress. In contrast, mutants defective in the AO and XDH holoenzymes accumulated significantly higher levels of anthocyanins when compared with aba3 mutant under the same conditions. Our findings shed light on a key role of ABA3 in the ABA- and allantoin-independent accumulation of anthocyanins during stress responses.
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Affiliation(s)
- Shunsuke Watanabe
- RIKEN Center for Sustainable Resource Science, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa, 230-0045, Japan
| | - Muneo Sato
- RIKEN Center for Sustainable Resource Science, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa, 230-0045, Japan
| | - Yuji Sawada
- RIKEN Center for Sustainable Resource Science, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa, 230-0045, Japan
| | - Maho Tanaka
- RIKEN Center for Sustainable Resource Science, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa, 230-0045, Japan
- RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan
| | - Akihiro Matsui
- RIKEN Center for Sustainable Resource Science, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa, 230-0045, Japan
- RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan
| | - Yuri Kanno
- RIKEN Center for Sustainable Resource Science, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa, 230-0045, Japan
| | - Masami Yokota Hirai
- RIKEN Center for Sustainable Resource Science, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa, 230-0045, Japan
| | - Motoaki Seki
- RIKEN Center for Sustainable Resource Science, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa, 230-0045, Japan
- RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan
| | - Atsushi Sakamoto
- Department of Mathematics and Life Sciences, Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, 739-8526, Japan
| | - Mitsunori Seo
- RIKEN Center for Sustainable Resource Science, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa, 230-0045, Japan.
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Mayer D, Mithöfer A, Glawischnig E, Georgii E, Ghirardo A, Kanawati B, Schmitt-Kopplin P, Schnitzler JP, Durner J, Gaupels F. Short-Term Exposure to Nitrogen Dioxide Provides Basal Pathogen Resistance. PLANT PHYSIOLOGY 2018; 178:468-487. [PMID: 30076223 PMCID: PMC6130038 DOI: 10.1104/pp.18.00704] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2018] [Accepted: 07/27/2018] [Indexed: 05/25/2023]
Abstract
Nitrogen dioxide (NO2) forms in plants under stress conditions, but little is known about its physiological functions. Here, we explored the physiological functions of NO2 in plant cells using short-term fumigation of Arabidopsis (Arabidopsis thaliana) for 1 h with 10 µL L-1 NO2. Although leaf symptoms were absent, the expression of genes related to pathogen resistance was induced. Fumigated plants developed basal disease resistance, or pattern-triggered immunity, against the necrotrophic fungus Botrytis cinerea and the hemibiotrophic bacterium Pseudomonas syringae Functional salicylic acid and jasmonic acid (JA) signaling pathways were both required for the full expression of NO2-induced resistance against B. cinerea An early peak of salicylic acid accumulation immediately after NO2 exposure was followed by a transient accumulation of oxophytodienoic acid. The simultaneous NO2-induced expression of genes involved in jasmonate biosynthesis and jasmonate catabolism resulted in the complete suppression of JA and JA-isoleucine (JA-Ile) accumulation, which was accompanied by a rise in the levels of their catabolic intermediates 12-OH-JA, 12-OH-JA-Ile, and 12-COOH-JA-Ile. NO2-treated plants emitted the volatile monoterpene α-pinene and the sesquiterpene longifolene (syn. junipene), which could function in signaling or direct defense against pathogens. NO2-triggered B. cinerea resistance was dependent on enhanced early callose deposition and CYTOCHROME P450 79B2 (CYP79B2), CYP79B3, and PHYTOALEXIN DEFICIENT3 gene functions but independent of camalexin, CYP81F2, and 4-OH-indol-3-ylmethylglucosinolate derivatives. In sum, exogenous NO2 triggers basal pathogen resistance, pointing to a possible role for endogenous NO2 in defense signaling. Additionally, this study revealed the involvement of jasmonate catabolism and volatiles in pathogen immunity.
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Affiliation(s)
- Dörte Mayer
- Institute of Biochemical Plant Pathology, Helmholtz Zentrum München, German Research Center for Environmental Health, D-85764 Neuherberg, Germany
| | - Axel Mithöfer
- Max Planck Institute for Chemical Ecology, Department Bioorganic Chemistry, D-07745 Jena, Germany
| | - Erich Glawischnig
- Department of Plant Sciences, Technical University of Munich, D-85354 Freising, Germany
| | - Elisabeth Georgii
- Institute of Biochemical Plant Pathology, Helmholtz Zentrum München, German Research Center for Environmental Health, D-85764 Neuherberg, Germany
| | - Andrea Ghirardo
- Research Unit Environmental Simulation, Institute of Biochemical Plant Pathology, German Research Center for Environmental Health, D-85764 Neuherberg, Germany
| | - Basem Kanawati
- Analytical BioGeoChemistry, Helmholtz Zentrum München, German Research Center for Environmental Health, D-85764 Neuherberg, Germany
| | - Philippe Schmitt-Kopplin
- Analytical BioGeoChemistry, Helmholtz Zentrum München, German Research Center for Environmental Health, D-85764 Neuherberg, Germany
| | - Jörg-Peter Schnitzler
- Research Unit Environmental Simulation, Institute of Biochemical Plant Pathology, German Research Center for Environmental Health, D-85764 Neuherberg, Germany
| | - Jörg Durner
- Institute of Biochemical Plant Pathology, Helmholtz Zentrum München, German Research Center for Environmental Health, D-85764 Neuherberg, Germany
| | - Frank Gaupels
- Institute of Biochemical Plant Pathology, Helmholtz Zentrum München, German Research Center for Environmental Health, D-85764 Neuherberg, Germany
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Chatukuta P, Dikobe TB, Kawadza DT, Sehlabane KS, Takundwa MM, Wong A, Gehring C, Ruzvidzo O. An Arabidopsis Clathrin Assembly Protein with a Predicted Role in Plant Defense Can Function as an Adenylate Cyclase. Biomolecules 2018; 8:biom8020015. [PMID: 29570675 PMCID: PMC6022867 DOI: 10.3390/biom8020015] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Revised: 03/15/2018] [Accepted: 03/16/2018] [Indexed: 11/29/2022] Open
Abstract
Adenylate cyclases (ACs), much like guanylate cyclases (GCs), are increasingly recognized as essential parts of many plant processes including biotic and abiotic stress responses. In order to identify novel ACs, we have applied a search motif derived from experimentally tested GCs and identified a number of Arabidopsis thaliana candidates including a clathrin assembly protein (AT1G68110; AtClAP). AtClAP contains a catalytic centre that can complement the AC-deficient mutant cyaA in E. coli, and a recombinant AtClAP fragment (AtClAP261–379) can produce cyclic adenosine 3′,5′ monophosphate (cAMP) from adenosine triphosphate (ATP) in vitro. Furthermore, an integrated analysis of gene expression and expression correlation implicate cAMP in pathogen defense and in actin cytoskeletal remodeling during endocytic internalization.
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Affiliation(s)
- Patience Chatukuta
- Department of Botany, School of Biological Sciences, North-West University, Private Bag X2046, Mmabatho 2735, South Africa.
| | - Tshegofatso B Dikobe
- Department of Botany, School of Biological Sciences, North-West University, Private Bag X2046, Mmabatho 2735, South Africa.
| | - David T Kawadza
- Department of Botany, School of Biological Sciences, North-West University, Private Bag X2046, Mmabatho 2735, South Africa.
| | - Katlego S Sehlabane
- Department of Botany, School of Biological Sciences, North-West University, Private Bag X2046, Mmabatho 2735, South Africa.
| | - Mutsa M Takundwa
- Department of Botany, School of Biological Sciences, North-West University, Private Bag X2046, Mmabatho 2735, South Africa.
| | - Aloysius Wong
- College of Natural, Applied and Health Sciences, Wenzhou-Kean University, 88 Daxue Road, Wenzhou 325060, Zhejiang Province, China.
| | - Chris Gehring
- Department of Chemistry, Biology & Biotechnology, University of Perugia, Borgo XX Giugno 74, 06121 Perugia, Italy.
| | - Oziniel Ruzvidzo
- Department of Botany, School of Biological Sciences, North-West University, Private Bag X2046, Mmabatho 2735, South Africa.
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Wong A, Tian X, Gehring C, Marondedze C. Discovery of Novel Functional Centers With Rationally Designed Amino Acid Motifs. Comput Struct Biotechnol J 2018; 16:70-76. [PMID: 29977479 PMCID: PMC6026216 DOI: 10.1016/j.csbj.2018.02.007] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2017] [Revised: 01/23/2018] [Accepted: 02/25/2018] [Indexed: 12/14/2022] Open
Abstract
Plants are constantly exposed to environmental stresses and in part due to their sessile nature, they have evolved signal perception and adaptive strategies that are distinct from those of other eukaryotes. This is reflected at the cellular level where receptors and signalling molecules cannot be identified using standard homology-based searches querying with proteins from prokaryotes and other eukaryotes. One of the reasons for this is the complex domain architecture of receptor molecules. In order to discover hidden plant signalling molecules, we have developed a motif-based approach designed specifically for the identification of functional centers in plant molecules. This has made possible the discovery of novel components involved in signalling and stimulus-response pathways; the molecules include cyclic nucleotide cyclases, a nitric oxide sensor and a novel target for the hormone abscisic acid. Here, we describe the major steps of the method and illustrate it with recent and experimentally confirmed molecules as examples. We foresee that carefully curated search motifs supported by structural and bioinformatic assessments will uncover many more structural and functional aspects, particularly of signalling molecules.
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Affiliation(s)
- Aloysius Wong
- Department of Biology, Wenzhou-Kean University, 88 Daxue Road, Ouhai, Wenzhou, Zhejiang Province 325060, China
| | - Xuechen Tian
- Department of Biology, Wenzhou-Kean University, 88 Daxue Road, Ouhai, Wenzhou, Zhejiang Province 325060, China
| | - Chris Gehring
- Department of Chemistry, Biology & Biotechnology, University of Perugia, Borgo XX giugno, 74, 06121 Perugia, Italy
| | - Claudius Marondedze
- Laboratoire de Physiologie Cellulaire et Végétale, Université Grenoble Alpes, CEA/DRF/BIG, INRA UMR1417, CNRS UMR5168, 38054 Grenoble Cedex 9, France
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Demidchik V, Maathuis F, Voitsekhovskaja O. Unravelling the plant signalling machinery: an update on the cellular and genetic basis of plant signal transduction. FUNCTIONAL PLANT BIOLOGY : FPB 2018; 45:1-8. [PMID: 32291017 DOI: 10.1071/fp17085] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2017] [Accepted: 05/27/2017] [Indexed: 06/11/2023]
Abstract
Plant signalling is a set of phenomena that serves the transduction of external and internal signals into physiological responses such as modification of enzyme activity, cytoskeleton structure or gene expression. It operates at the level of cell compartments, whole cells, tissues, organs or even plant communities. To achieve this, plants have evolved a network of signalling proteins including plasma membrane receptors and ion transporters, cascades of kinases and other enzymes as well as several second messengers such as cytosolic calcium (Ca2+), reactive oxygen/nitrogen species (ROS/RNS), cyclic nucleotides (cAMP and cGMP) and others. Overall, these systems recognise and decode environmental signals and co-ordinate ontogeny programs. This paper summarises recent progress in the field of plant signalling, which was a major theme of the 4th International Symposium on Plant Signalling and Behaviour, 2016, in Saint Petersburg, Russia. Several novel hypotheses and concepts were proposed during this meeting. First, the concept of ROS-Ca2+ hubs has found further evidence and acceptance. This concept is based on reciprocal activation of NADPH oxidases by cytosolic Ca2+ on the one hand, and Ca2+-permeable channels that are activated by NADPH-produced ROS. ROS-Ca2+ hubs enhance the intensity and duration of originally weak Ca2+ and ROS signals. Hubs are directly involved in ROS- and Ca2+-mediated physiological reactions, such as stress response, growth, programmed cell death, autophagy and long-distance signalling. Second, recent findings have widened the list of cyclic nucleotide-regulated processes and strengthened the biochemical basis of cyclic nucleotide biochemistry by exploring cyclase activities of new receptors such as the Phytosulfokine Receptor 1, the pathogen peptide 1 receptor (atPepR1), the brassinosteroid BRI1 receptor and the cell wall-associated kinase like 10. cGMP and cAMP signalling has demonstrated strong link to Ca2+ signalling, via cyclic nucleotide-gated Ca2+-permeable ion channels (CNGCs), and to ROS and RNS via their nitrosylated forms. Third, a novel role for cytosolic K+ as a regulator of plant autophagy and programmed cell death has emerged. The cell death-associated proteases and endonucleases were demonstrated to be activated by a decrease of cytosolic K+ via ROS-induced stimulation of the plasma membrane K+ efflux channel GORK. Importantly, the origin of ROS for induction of autophagy and cell death varies in different tissues and comprises several pools, including NADPH oxidases, peroxidases, photosynthetic and respiratory electron-transporting chains and peroxisomal enzymes. The peroxisome pool is the 'latest' addition to established cellular ROS-producing machineries and is dependent on the state and abundance of catalase in this compartment. Finally, new aspects of phytohormone signalling, such as regulation of root hydraulic pressure by abscisic acid and rate of mitosis by cytokinins, as well as localising cytokinin receptors in endoplasmic reticulum, are reported. Other observations suggest that melatonin is a hormone-like substance in plants, because it targets Ca2+, ROS and RNS.
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Affiliation(s)
- Vadim Demidchik
- Department of Plant Cell Biology and Bioengineering, Biological Faculty, Belarusian State University, 4 Independence Avenue, Minsk, 220030, Belarus
| | - Frans Maathuis
- Department of Biology, University of York, York YO10 5DD, UK
| | - Olga Voitsekhovskaja
- Laboratory of Molecular and Ecological Physiology, Komarov Botanical Institute, Russian Academy of Sciences, 2 Professora Popova Street, 197376St Petersburg, Russia
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41
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Luo S, Zhang X, Wang J, Jiao C, Chen Y, Shen Y. Plant ion channels and transporters in herbivory-induced signalling. FUNCTIONAL PLANT BIOLOGY : FPB 2018; 45:111-131. [PMID: 32291026 DOI: 10.1071/fp16318] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2016] [Accepted: 12/06/2016] [Indexed: 06/11/2023]
Abstract
In contrast to many biotic stresses that plants face, feeding by herbivores produces unique mechanical and chemical signatures. Plants have evolved effective systems to recognise these mechanical stimuli and chemical elicitors at the plasma membrane (PM), where this recognition generates ion fluxes, including an influx of Ca2+ that elicits cellular Ca2+ signalling, production of reactive oxygen species (ROS), and variation in transmembrane potential. These signalling events also function in propagation of long-distance signals (Ca2+ waves, ROS waves, and electrical signals), which contribute to rapid, systemic induction of defence responses. Recent studies have identified several candidate channels or transporters that likely produce these ion fluxes at the PM. Here, we describe the important roles of these channels/transporters in transduction or transmission of herbivory-induced early signalling events, long-distance signals, and jasmonic acid and green leaf volatile signalling in plants.
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Affiliation(s)
- Shuitian Luo
- College of Biological Sciences and Technology, Beijing Forestry University, Beijing 100083, China
| | - Xiao Zhang
- College of Biological Sciences and Technology, Beijing Forestry University, Beijing 100083, China
| | - Jinfei Wang
- College of Biological Sciences and Technology, Beijing Forestry University, Beijing 100083, China
| | - Chunyang Jiao
- College of Biological Sciences and Technology, Beijing Forestry University, Beijing 100083, China
| | - Yingying Chen
- College of Biological Sciences and Technology, Beijing Forestry University, Beijing 100083, China
| | - Yingbai Shen
- College of Biological Sciences and Technology, Beijing Forestry University, Beijing 100083, China
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Abstract
Nitric oxide (NO) is a cellular signalling molecule widely conserved among organisms, including microorganisms such as bacteria, yeasts, and fungi, and higher eukaryotes such as plants and mammals. NO is mainly produced by the activities of NO synthase (NOS) or nitrite reductase (NIR). There are several NO detoxification systems, including NO dioxygenase (NOD) and S-nitrosoglutathione reductase (GSNOR). NO homeostasis, based on the balance between NO synthesis and degradation, is important for regulating its physiological functions, since an excess of NO causes nitrosative stress due to the high reactivity of NO and NO-derived compounds. In yeast, NO may be involved in stress responses, but the role of NO and the mechanism underlying NO signalling are poorly understood due to the lack of mammalian NOS orthologs in the yeast genome. NOS and NIR activities have been observed in yeast cells, but the gene-encoding NOS and the mechanism by which NO production is catalysed by NIR remain unclear. On the other hand, yeast cells employ NOD and GSNOR to maintain intracellular redox balance following endogenous NO production, treatment with exogenous NO, or exposure to environmental stresses. This article reviews NO metabolism (synthesis, degradation) and its regulation in yeast. The physiological roles of NO in yeast, including the oxidative stress response, are also discussed. Such investigations into NO signalling are essential for understanding how NO modulates the genetics and physiology of yeast. In addition to being responsible for the pathology and pharmacology of various degenerative diseases, NO signalling may be a potential target for the construction and engineering of industrial yeast strains.
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Isner JC, Maathuis FJM. cGMP signalling in plants: from enigma to main stream. FUNCTIONAL PLANT BIOLOGY : FPB 2018; 45:93-101. [PMID: 32291024 DOI: 10.1071/fp16337] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2016] [Accepted: 11/25/2016] [Indexed: 05/05/2023]
Abstract
All living organisms communicate with their environment, and part of this dialogue is mediated by secondary messengers such as cyclic guanosine mono phosphate (cGMP). In plants, most of the specific components that allow production and breakdown of cGMP have now been identified apart from cGMP dependent phosphodiesterases, enzymes responsible for cGMP catabolism. Irrespectively, the role of cGMP in plant signal transductions is now firmly established with involvement of this nucleotide in development, stress response, ion homeostasis and hormone function. Within these areas, several consistent themes where cGMP may be particularly relevant are slowly emerging: these include regulation of cation fluxes, for example via cyclic nucleotide gated channels and in stomatal functioning. Many details of signalling pathways that incorporate cGMP remain to be unveiled. These include downstream targets other than a small number of ion channels, in particular cGMP dependent kinases. Improved genomics tools may help in this respect, especially since many proteins involved in cGMP signalling appear to have multiple and often overlapping functional domains which hampers identification on the basis of simple homology searches. Another open question regards the topographical distribution of cGMP signals are they cell limited? Does long distance cGMP signalling occur and if so, by what mechanisms? The advent of non-disruptive fluorescent reporters with high spatial and temporal resolution will provide a tool to accelerate progress in all these areas. Automation can facilitate large scale screens of mutants or the action of effectors that impact on cGMP signalling.
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Affiliation(s)
- Jean-Charles Isner
- School of Biological Sciences, Life Sciences Building, University of Bristol, Woodland Road, 24 Tyndall Avenue, Bristol BS8 1TQ, UK
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44
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Arimoto H, Takahashi D. 8-Nitro-cGMP: A Novel Protein-Reactive cNMP and Its Emerging Roles in Autophagy. Handb Exp Pharmacol 2017; 238:253-268. [PMID: 28213625 DOI: 10.1007/164_2016_5000] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Nitric oxide (NO) raises the intracellular 3',5'-cyclic guanosine monophosphate (cGMP) level through the activation of soluble guanylate cyclase and, in the presence of reactive oxygen species (ROS), reacts with biomolecules to produce nitrated cGMP derivatives. 8-Nitro-cGMP was the first endogenous cGMP derivative discovered in mammalian cells (2007) and was later found in plant cells. Among the six nitrogen atoms in this molecule, the one in the nitro group (NO2) comes from NO. This chapter asserts that this newly found cGMP is undoubtedly one of the major physiological cNMPs. Multiple studies suggest that its intracellular abundance might exceed that of unmodified cGMP. The characteristic chemical feature of 8-nitro-cGMP is its ability to modify proteinous cysteine residues via a stable sulfide bond. In this posttranslational modification, the nitro group is detached from the guanine base. This modification, termed "protein S-guanylation," is known to regulate the physiological functions of several important proteins. Furthermore, 8-nitro-cGMP participates in the regulation of autophagy. For example, in antibacterial autophagy (xenophagy), S-guanylation accumulates around invading bacterial cells and functions as a "tag" for subsequent clearance of the organism via ubiquitin modifications. This finding suggests the existence of a system for recognizing the cGMP structure on proteins. Autophagy induction by 8-nitro-cGMP is mechanistically distinct from the well-described starvation-induced autophagy and is independent of the action of mTOR, the master regulator of canonical autophagy.
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Affiliation(s)
- Hirokazu Arimoto
- Graduate School of Life Sciences, Tohoku University, Sendai, Japan.
| | - Daiki Takahashi
- Graduate School of Life Sciences, Tohoku University, Sendai, Japan
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45
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Gehring C, Turek IS. Cyclic Nucleotide Monophosphates and Their Cyclases in Plant Signaling. FRONTIERS IN PLANT SCIENCE 2017; 8:1704. [PMID: 29046682 PMCID: PMC5632652 DOI: 10.3389/fpls.2017.01704] [Citation(s) in RCA: 61] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2017] [Accepted: 09/19/2017] [Indexed: 05/19/2023]
Abstract
The cyclic nucleotide monophosphates (cNMPs), and notably 3',5'-cyclic guanosine monophosphate (cGMP) and 3',5'-cyclic adenosine monophosphate (cAMP) are now accepted as key signaling molecules in many processes in plants including growth and differentiation, photosynthesis, and biotic and abiotic defense. At the single molecule level, we are now beginning to understand how cNMPs modify specific target molecules such as cyclic nucleotide-gated channels, while at the systems level, a recent study of the Arabidopsis cNMP interactome has identified novel target molecules with specific cNMP-binding domains. A major advance came with the discovery and characterization of a steadily increasing number of guanylate cyclases (GCs) and adenylate cyclases (ACs). Several of the GCs are receptor kinases and include the brassinosteroid receptor, the phytosulfokine receptor, the Pep receptor, the plant natriuretic peptide receptor as well as a nitric oxide sensor. We foresee that in the near future many more molecular mechanisms and biological roles of GCs and ACs and their catalytic products will be discovered and further establish cNMPs as a key component of plant responses to the environment.
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Affiliation(s)
- Chris Gehring
- Biological and Environmental Science and Engineering, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia
- Department of Chemistry, Biology and Biotechnology, University of Perugia, Perugia, Italy
| | - Ilona S. Turek
- Biological and Environmental Science and Engineering, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia
- Leibniz Institute of Plant Biochemistry, Halle, Germany
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Albert R, Acharya BR, Jeon BW, Zañudo JGT, Zhu M, Osman K, Assmann SM. A new discrete dynamic model of ABA-induced stomatal closure predicts key feedback loops. PLoS Biol 2017; 15:e2003451. [PMID: 28937978 PMCID: PMC5627951 DOI: 10.1371/journal.pbio.2003451] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2017] [Revised: 10/04/2017] [Accepted: 09/04/2017] [Indexed: 11/19/2022] Open
Abstract
Stomata, microscopic pores in leaf surfaces through which water loss and carbon dioxide uptake occur, are closed in response to drought by the phytohormone abscisic acid (ABA). This process is vital for drought tolerance and has been the topic of extensive experimental investigation in the last decades. Although a core signaling chain has been elucidated consisting of ABA binding to receptors, which alleviates negative regulation by protein phosphatases 2C (PP2Cs) of the protein kinase OPEN STOMATA 1 (OST1) and ultimately results in activation of anion channels, osmotic water loss, and stomatal closure, over 70 additional components have been identified, yet their relationships with each other and the core components are poorly elucidated. We integrated and processed hundreds of disparate observations regarding ABA signal transduction responses underlying stomatal closure into a network of 84 nodes and 156 edges and, as a result, established those relationships, including identification of a 36-node, strongly connected (feedback-rich) component as well as its in- and out-components. The network's domination by a feedback-rich component may reflect a general feature of rapid signaling events. We developed a discrete dynamic model of this network and elucidated the effects of ABA plus knockout or constitutive activity of 79 nodes on both the outcome of the system (closure) and the status of all internal nodes. The model, with more than 1024 system states, is far from fully determined by the available data, yet model results agree with existing experiments in 82 cases and disagree in only 17 cases, a validation rate of 75%. Our results reveal nodes that could be engineered to impact stomatal closure in a controlled fashion and also provide over 140 novel predictions for which experimental data are currently lacking. Noting the paucity of wet-bench data regarding combinatorial effects of ABA and internal node activation, we experimentally confirmed several predictions of the model with regard to reactive oxygen species, cytosolic Ca2+ (Ca2+c), and heterotrimeric G-protein signaling. We analyzed dynamics-determining positive and negative feedback loops, thereby elucidating the attractor (dynamic behavior) repertoire of the system and the groups of nodes that determine each attractor. Based on this analysis, we predict the likely presence of a previously unrecognized feedback mechanism dependent on Ca2+c. This mechanism would provide model agreement with 10 additional experimental observations, for a validation rate of 85%. Our research underscores the importance of feedback regulation in generating robust and adaptable biological responses. The high validation rate of our model illustrates the advantages of discrete dynamic modeling for complex, nonlinear systems common in biology.
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Affiliation(s)
- Réka Albert
- Department of Physics, Pennsylvania State University, University Park, Pennsylvania, United States of America
| | - Biswa R. Acharya
- Biology Department, Pennsylvania State University, University Park, Pennsylvania, United States of America
| | - Byeong Wook Jeon
- Biology Department, Pennsylvania State University, University Park, Pennsylvania, United States of America
| | - Jorge G. T. Zañudo
- Department of Physics, Pennsylvania State University, University Park, Pennsylvania, United States of America
| | - Mengmeng Zhu
- Biology Department, Pennsylvania State University, University Park, Pennsylvania, United States of America
| | - Karim Osman
- Biology Department, Pennsylvania State University, University Park, Pennsylvania, United States of America
| | - Sarah M. Assmann
- Biology Department, Pennsylvania State University, University Park, Pennsylvania, United States of America
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47
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Choudhury FK, Rivero RM, Blumwald E, Mittler R. Reactive oxygen species, abiotic stress and stress combination. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2017; 90:856-867. [PMID: 27801967 DOI: 10.1111/tpj.13299] [Citation(s) in RCA: 1040] [Impact Index Per Article: 148.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2016] [Revised: 08/01/2016] [Accepted: 08/04/2016] [Indexed: 05/18/2023]
Abstract
Reactive oxygen species (ROS) play a key role in the acclimation process of plants to abiotic stress. They primarily function as signal transduction molecules that regulate different pathways during plant acclimation to stress, but are also toxic byproducts of stress metabolism. Because each subcellular compartment in plants contains its own set of ROS-producing and ROS-scavenging pathways, the steady-state level of ROS, as well as the redox state of each compartment, is different at any given time giving rise to a distinct signature of ROS levels at the different compartments of the cell. Here we review recent studies on the role of ROS in abiotic stress in plants, and propose that different abiotic stresses, such as drought, heat, salinity and high light, result in different ROS signatures that determine the specificity of the acclimation response and help tailor it to the exact stress the plant encounters. We further address the role of ROS in the acclimation of plants to stress combination as well as the role of ROS in mediating rapid systemic signaling during abiotic stress. We conclude that as long as cells maintain high enough energy reserves to detoxify ROS, ROS is beneficial to plants during abiotic stress enabling them to adjust their metabolism and mount a proper acclimation response.
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Affiliation(s)
- Feroza K Choudhury
- Department of Biological Sciences, College of Arts and Sciences, University of North Texas, 1155 Union Circle #305220, Denton, TX, 76203-5017, USA
| | - Rosa M Rivero
- Department of Plant Nutrition, CEBAS-CSIC, Campus Universitario Espinardo, Ed. 25, 30100, Espinardo, Murcia, Spain
| | - Eduardo Blumwald
- Department of Plant Sciences, Mail Stop 5, University of California, 1 Shields Ave, Davis, CA, 95616, USA
| | - Ron Mittler
- Department of Biological Sciences, College of Arts and Sciences, University of North Texas, 1155 Union Circle #305220, Denton, TX, 76203-5017, USA
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Asgher M, Per TS, Masood A, Fatma M, Freschi L, Corpas FJ, Khan NA. Nitric oxide signaling and its crosstalk with other plant growth regulators in plant responses to abiotic stress. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:2273-2285. [PMID: 27812964 DOI: 10.1007/s11356-016-7947-8] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2016] [Accepted: 10/20/2016] [Indexed: 05/18/2023]
Abstract
Nitric oxide (NO) is a free radical molecule involved in an array of functions under physiological and adverse environmental conditions. As other free radical molecules, NO biological action depends on its cellular concentration, acting as a signal molecule when produced at low concentration or resulting in cellular damage when produced at sufficiently high levels to trigger nitro-oxidative stress. Over the last decade, significant progress has been made in characterizing NO metabolism and action mechanism, revealing that diverse biosynthetic routes can generate this free radical in plants and its action mainly occurs through posttranslational modification (nitration and S-nitrosylation) of target proteins. Intricate crosstalk networks between NO and other signaling molecules have been described involving phytohormones, other second messengers, and key transcription factors. This review will focus on our current understanding of NO interplay with phytohormones and other plant growth regulators under abiotic stress conditions.
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Affiliation(s)
- Mohd Asgher
- Plant Physiology and Biochemistry Laboratory, Department of Botany, Aligarh Muslim University, Aligarh, 202002, India
| | - Tasir S Per
- Plant Physiology and Biochemistry Laboratory, Department of Botany, Aligarh Muslim University, Aligarh, 202002, India
| | - Asim Masood
- Plant Physiology and Biochemistry Laboratory, Department of Botany, Aligarh Muslim University, Aligarh, 202002, India
| | - Mehar Fatma
- Plant Physiology and Biochemistry Laboratory, Department of Botany, Aligarh Muslim University, Aligarh, 202002, India
| | - Luciano Freschi
- Laboratory of Plant Physiology and Biochemistry, Department of Botany, University of Sao Paulo, Sao Paulo, Brazil
| | - Francisco J Corpas
- Group of Antioxidants, Free Radicals and Nitric Oxide in Biotechnology, Food and Agriculture, Department of Biochemistry, Cell and Molecular Biology of Plants, Estación Experimental del Zaidín, CSIC, Apartado 419, 18080, Granada, Spain.
| | - Nafees A Khan
- Plant Physiology and Biochemistry Laboratory, Department of Botany, Aligarh Muslim University, Aligarh, 202002, India.
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Li FC, Wang J, Wu MM, Fan CM, Li X, He JM. Mitogen-Activated Protein Kinase Phosphatases Affect UV-B-Induced Stomatal Closure via Controlling NO in Guard Cells. PLANT PHYSIOLOGY 2017; 173:760-770. [PMID: 27837091 PMCID: PMC5210765 DOI: 10.1104/pp.16.01656] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2016] [Accepted: 11/07/2016] [Indexed: 05/04/2023]
Abstract
Ultraviolet B (UV-B) radiation induces the activation of MITOGEN-ACTIVATED PROTEIN KINASE PHOSPHATASE1 (MKP1) and its targets MPK3 and MPK6, but whether they participate in UV-B guard cell signaling is not clear. Here, evidence shows that UV-B-induced stomatal closure in Arabidopsis (Arabidopsis thaliana) is antagonistically regulated by MKP1 and MPK6 via modulating hydrogen peroxide (H2O2)-induced nitric oxide (NO) production in guard cells. The mkp1 mutant was hypersensitive to UV-B-induced stomatal closure and NO production in guard cells but not to UV-B-induced H2O2 production, suggesting that MKP1 negatively regulates UV-B-induced stomatal closure via inhibiting NO generation in guard cells. Moreover, MPK3 and MPK6 were activated by UV-B in leaves of the wild type and hyperactivated in the mkp1 mutant, but the UV-B-induced activation of MPK3 and MPK6 was largely inhibited in mutants for ATRBOHD and ATRBOHF but not in mutants for NIA1 and NIA2 mpk6 mutants showed defects of UV-B-induced NO production and stomatal closure but were normal in UV-B-induced H2O2 production, while stomata of mpk3 mutants responded to UV-B just like those of the wild type. The defect of UV-B-induced stomatal closure in mpk6 mutants was rescued by exogenous NO but not by exogenous H2O2 Furthermore, double mutant mkp1/mpk6 and the single mutant mpk6 showed the same responses to UV-B in terms of either stomatal movement or H2O2 and NO production. These data indicate that MPK6, but not MPK3, positively regulates UV-B-induced stomatal closure via acting downstream of H2O2 and upstream of NO, while MKP1 functions negatively in UV-B guard cell signaling via down-regulation of MPK6.
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Affiliation(s)
- Feng-Chen Li
- School of Life Sciences, Shaanxi Normal University, Xi'an 710062, China
| | - Jing Wang
- School of Life Sciences, Shaanxi Normal University, Xi'an 710062, China
| | - Mi-Mi Wu
- School of Life Sciences, Shaanxi Normal University, Xi'an 710062, China
| | - Cai-Ming Fan
- School of Life Sciences, Shaanxi Normal University, Xi'an 710062, China
| | - Xuan Li
- School of Life Sciences, Shaanxi Normal University, Xi'an 710062, China
| | - Jun-Min He
- School of Life Sciences, Shaanxi Normal University, Xi'an 710062, China
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Ahmed KA, Zhang T, Ono K, Tsutsuki H, Ida T, Akashi S, Miyata K, Oike Y, Akaike T, Sawa T. Synthesis and Characterization of 8-Nitroguanosine 3',5'-Cyclic Monophosphorothioate Rp-Isomer as a Potent Inhibitor of Protein Kinase G1α. Biol Pharm Bull 2016; 40:365-374. [PMID: 27980245 DOI: 10.1248/bpb.b16-00880] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Guanosine 3',5'-cyclic monophosphate (cGMP)-dependent protein kinases (PKG) are kinases regulating diverse physiological functions including vascular smooth muscle relaxation, neuronal synaptic plasticity, and platelet activities. Certain PKG inhibitors, such as Rp-diastereomers of derivatives of guanosine 3',5'-cyclic monophosphorothioate (Rp-cGMPS), have been designed and used to study PKG-regulated cell signaling. 8-Nitroguanosine 3',5'-cyclic monophosphate (8-nitro-cGMP) is an endogenous cGMP derivative formed as a result of excess production of reactive oxygen species and nitric oxide. 8-Nitro-cGMP causes persistent activation of PKG1α through covalent attachment of cGMP moieties to cysteine residues of the enzyme (i.e., the process called protein S-guanylation). In this study, we synthesized a nitrated analogue of Rp-cGMPS, 8-nitroguanosine 3',5'-cyclic monophosphorothioate Rp-isomer (Rp-8-nitro-cGMPS), and investigated its effects on PKG1α activity. We synthesized Rp-8-nitro-cGMPS by reacting Rp-8-bromoguanosine 3',5'-cyclic monophosphorothioate (Rp-8-bromo-cGMPS) with sodium nitrite. Rp-8-Nitro-cGMPS reacted with the thiol compounds cysteine and glutathione to form Rp-8-thioalkoxy-cGMPS adducts to a similar extent as did 8-nitro-cGMP. As an important finding, a protein S-guanylation-like modification was clearly observed, by using Western blotting, in the reaction between recombinant PKG1α and Rp-8-nitro-cGMPS. Rp-8-Nitro-cGMPS inhibited PKG1α activity with an inhibitory constant of 22 µM in a competitive manner. An organ bath assay with mouse aorta demonstrated that Rp-8-nitro-cGMPS inhibited vascular relaxation induced by acetylcholine or 8-bromo-cGMP more than Rp-8-bromo-cGMPS did. These findings suggest that Rp-8-nitro-cGMPS inhibits PKG through induction of an S-guanylation-like modification by attaching the Rp-cGMPS moiety to the enzyme. Additional study is warranted to explore the potential application of Rp-8-nitro-cGMPS to biochemical and therapeutic research involving PKG1α activation.
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