10 results on '"Lamotte, Olivier"'
Search Results
2. NO signaling in plant immunity: a tale of messengers.
- Author
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Trapet P, Kulik A, Lamotte O, Jeandroz S, Bourque S, Nicolas-Francès V, Rosnoblet C, Besson-Bard A, and Wendehenne D
- Subjects
- Calcium metabolism, Reactive Oxygen Species metabolism, Nitric Oxide metabolism, Plant Immunity, Signal Transduction immunology
- Abstract
Nitric oxide (NO) is a free radical gas involved in a myriad of plant physiological processes including immune responses. How NO mediates its biological effects in plant facing microbial pathogen attack is an unresolved question. Insights into the molecular mechanisms by which it propagates signals reveal the contribution of this simple gas in complex signaling pathways shared with reactive oxygen species (ROS) and the second messenger Ca(2+). Understanding of the subtle cross-talks operating between these signals was greatly improved by the recent identification and the functional analysis of proteins regulated through S-nitrosylation, a major NO-dependent post-translational protein modification. Overall, these findings suggest that NO is probably an important component of the mechanism coordinating and regulating Ca(2+) and ROS signaling in plant immunity., (Copyright © 2014 Elsevier Ltd. All rights reserved.)
- Published
- 2015
- Full Text
- View/download PDF
3. [Nitric oxide is a major player in plant immune system].
- Author
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Koen E, Lamotte O, Besson-Bard A, Bourque S, Nicolas-Francès V, Jeandroz S, and Wendehenne D
- Subjects
- Arabidopsis Proteins, NADPH Oxidases, Nitric Oxide biosynthesis, Plant Proteins, Plants metabolism, Signal Transduction, Nitric Oxide physiology, Plant Immunity physiology
- Abstract
In animals, nitric oxide (NO) functions as a ubiquitous signaling molecule involved in diverse physiological processes such as immunity. Recent studies provided evidence that plants challenged by pathogenic microorganisms also produce NO. The emerging picture is that NO functions as a signal in plant immunity and executes part of its effects through posttranslational protein modifications. Notably, the characterization of S-nitrosylated proteins provided insights into the molecular mechanisms by which NO exerts its activities. Based on these findings, it appears that NO is involved in both the activation and the negative control of the signaling pathways related to plant immunity., (© 2013 médecine/sciences – Inserm / SRMS.)
- Published
- 2013
- Full Text
- View/download PDF
4. A permeable cuticle is associated with the release of reactive oxygen species and induction of innate immunity.
- Author
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L'Haridon F, Besson-Bard A, Binda M, Serrano M, Abou-Mansour E, Balet F, Schoonbeek HJ, Hess S, Mir R, Léon J, Lamotte O, and Métraux JP
- Subjects
- Abscisic Acid genetics, Abscisic Acid immunology, Arabidopsis Proteins genetics, Arabidopsis Proteins immunology, Carboxy-Lyases genetics, Carboxy-Lyases immunology, Coenzyme A Ligases genetics, Coenzyme A Ligases immunology, Fungal Proteins genetics, Fungal Proteins metabolism, Membrane Lipids genetics, Membrane Lipids immunology, Mutation immunology, Plants, Genetically Modified genetics, Plants, Genetically Modified immunology, Plants, Genetically Modified microbiology, Trametes genetics, Arabidopsis immunology, Arabidopsis microbiology, Botrytis immunology, Hydrogen Peroxide immunology, Plant Diseases genetics, Plant Diseases immunology, Plant Diseases microbiology, Plant Immunity physiology, Plant Leaves genetics, Plant Leaves immunology, Plant Leaves microbiology, Superoxides immunology
- Abstract
Wounded leaves of Arabidopsis thaliana show transient immunity to Botrytis cinerea, the causal agent of grey mould. Using a fluorescent probe, histological staining and a luminol assay, we now show that reactive oxygen species (ROS), including H(2)O(2) and O(2) (-), are produced within minutes after wounding. ROS are formed in the absence of the enzymes Atrboh D and F and can be prevented by diphenylene iodonium (DPI) or catalase. H(2)O(2) was shown to protect plants upon exogenous application. ROS accumulation and resistance to B. cinerea were abolished when wounded leaves were incubated under dry conditions, an effect that was found to depend on abscisic acid (ABA). Accordingly, ABA biosynthesis mutants (aba2 and aba3) were still fully resistant under dry conditions even without wounding. Under dry conditions, wounded plants contained higher ABA levels and displayed enhanced expression of ABA-dependent and ABA-reporter genes. Mutants impaired in cutin synthesis such as bdg and lacs2.3 are already known to display a high level of resistance to B. cinerea and were found to produce ROS even when leaves were not wounded. An increased permeability of the cuticle and enhanced ROS production were detected in aba2 and aba3 mutants as described for bdg and lacs2.3. Moreover, leaf surfaces treated with cutinase produced ROS and became more protected to B. cinerea. Thus, increased permeability of the cuticle is strongly linked with ROS formation and resistance to B. cinerea. The amount of oxalic acid, an inhibitor of ROS secreted by B. cinerea could be reduced using plants over expressing a fungal oxalate decarboxylase of Trametes versicolor. Infection of such plants resulted in a faster ROS accumulation and resistance to B. cinerea than that observed in untransformed controls, demonstrating the importance of fungal suppression of ROS formation by oxalic acid. Thus, changes in the diffusive properties of the cuticle are linked with the induction ROS and attending innate defenses.
- Published
- 2011
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- View/download PDF
5. NO Signalling in Plant Immunity
- Author
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Rosnoblet, Claire, Bourque, Stéphane, Nicolas-Francès, Valérie, Lamotte, Olivier, Besson-Bard, Angélique, Jeandroz, Sylvain, Wendehenne, David, Baluška, František, Series Editor, Lamattina, Lorenzo, editor, and García-Mata, Carlos, editor
- Published
- 2016
- Full Text
- View/download PDF
6. Emerging functions of nitric oxide in plant immunity
- Author
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ROSNOBLET, Claire, Bourque, Stéphane, Nicolas-Frances, Valérie, Lamotte, Olivier, Besson-Bard, Angelique, Jeandroz, Sylvain, Wendehenne, David, Agroécologie [Dijon], Institut National de la Recherche Agronomique ( INRA ) -Université de Bourgogne ( UB ) -AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement-Université Bourgogne Franche-Comté ( UBFC ), Université de Bourgogne ( UB ), Institut National de la Recherche Agronomique (INRA)-Université de Bourgogne (UB)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement-Université Bourgogne Franche-Comté [COMUE] (UBFC), Université de Bourgogne (UB), Université de Bourgogne (UB)-Institut National de la Recherche Agronomique (INRA)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement, and Lorenzo Lamattina, Carlos Garcia-Mata eds.
- Subjects
Cdc48 ,nitric oxide ,plant immunity ,S-nitrosylation ,histone deacetylases ,calmoduline ,[ SDV ] Life Sciences [q-bio] ,[SDV]Life Sciences [q-bio] - Abstract
SPEIPMUBAgrosupCNRS; The importance of nitric oxide (NO) in innate and adaptive immunity in mammals is well recognised. NO exerts antimicrobial properties against invaders but also displays immunoregulatory functions in which S-nitrosylation represents a signalling process of major importance. Over the last two decades, a growing body of evidence suggests that NO is also a major component of plant immunity. Our understanding of its role in plant defence has been enriched by the identification and functional analysis of S-nitrosylated proteins. The recent identification of new S-nitrosylated proteins including the chaperone-like enzyme cell division cycle 48 (CDC48), histone deacetylases (HDACs) and calmodulin (CaM) reveals that NO could act as a modulator of epigenetic changes and targeting of ubiquitinated proteins for degradation. These findings also expand our understanding of the mechanisms controlling NO synthesis and its crosstalks with calcium signalling in plant immunity
- Published
- 2016
7. New insights about the role of the chaperon-like protein Cdc48, a target for nitric oxide in plant immunity
- Author
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Rosnoblet, Claire, Blanchard, Cécile, Begue, Hervé, Besson-Bard, Angelique, Lamotte, Olivier, Aimé, Sébastien, Wendehenne, David, Agroécologie [Dijon], Institut National de la Recherche Agronomique (INRA)-Université de Bourgogne (UB)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement, Centre National de la Recherche Scientifique (CNRS), and ProdInra, Migration
- Subjects
[SDV] Life Sciences [q-bio] ,[SDE] Environmental Sciences ,nitric oxide ,[SDV]Life Sciences [q-bio] ,[SDE]Environmental Sciences ,[SDV.BV]Life Sciences [q-bio]/Vegetal Biology ,[SDV.BV] Life Sciences [q-bio]/Vegetal Biology ,plant immunity ,chaperon-like protein Cdc48 - Published
- 2015
8. NO signaling in cryptogein-induced immune responses in tobacco
- Author
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Lamotte, Olivier, PFISTER, Carole, Aime, Sébastien, Trapet, Pauline, ROSNOBLET, Claire, Besson-Bard, Angelique, Jeandroz, Sylvain, Terenzi, Herman, Wendehenne, David, Agroécologie [Dijon], Institut National de la Recherche Agronomique (INRA)-Université de Bourgogne (UB)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement, Universidade Federal de Santa Catarina = Federal University of Santa Catarina [Florianópolis] (UFSC), Universidade Federal de Santa Catarina [Florianópolis] (UFSC), and Dijon (Kevin Oudard), Institut Agro
- Subjects
Calmodulin ,Tobacco ,[SDV.BV]Life Sciences [q-bio]/Vegetal Biology ,[SDV.BV] Life Sciences [q-bio]/Vegetal Biology ,Cryptogein ,Calcium ,Nitric oxide ,PAMP ,plant immunity ,NO - Abstract
SPEIPM; International audience
- Published
- 2014
9. There's More to the Picture Than Meets the Eye: Nitric Oxide Cross Talk with Ca2+ Signaling1
- Author
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Jeandroz, Sylvain, Lamotte, Olivier, Astier, Jérémy, Rasul, Sumaira, Trapet, Pauline, Besson-Bard, Angélique, Bourque, Stéphane, Nicolas-Francès, Valérie, Ma, Wei, Berkowitz, Gerald A., and Wendehenne, David
- Subjects
Calmodulin ,Gene Expression Regulation, Plant ,Molecular Sequence Data ,Calcium ,Plant Immunity ,Amino Acid Sequence ,Calcium Signaling ,Nitric Oxide ,Topical Reviews - Focus Issue - Abstract
Calcium and nitric oxide (NO) are two important biological messengers. Increasing evidence indicates that Ca(2+) and NO work together in mediating responses to pathogenic microorganisms and microbe-associated molecular patterns. Ca(2+) fluxes were recognized to account for NO production, whereas evidence gathered from a number of studies highlights that NO is one of the key messengers mediating Ca(2+) signaling. Here, we present a concise description of the current understanding of the molecular mechanisms underlying the cross talk between Ca(2+) and NO in plant cells exposed to biotic stress. Particular attention will be given to the involvement of cyclic nucleotide-gated ion channels and Ca(2+) sensors. Notably, we provide new evidence that calmodulin might be regulated at the posttranslational level by NO through S-nitrosylation. Furthermore, we report original transcriptomic data showing that NO produced in response to oligogalacturonide regulates the expression of genes related to Ca(2+) signaling. Deeper insight into the molecules involved in the interplay between Ca(2+) and NO not only permits a better characterization of the Ca(2+) signaling system but also allows us to further understand how plants respond to pathogen attack.
- Published
- 2013
10. Protein S-nitrosylation: What's going on in plants?
- Author
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Astier, Jéremy, Kulik, Anna, Koen, Emmanuel, Besson-Bard, Angélique, Bourque, Stéphane, Jeandroz, Sylvain, Lamotte, Olivier, and Wendehenne, David
- Subjects
- *
PROTEIN S , *NITROSYLATION , *PLANT physiology , *PROTEIN kinases , *PLANT hormones , *GENE targeting , *PLANT cellular signal transduction - Abstract
Abstract: Nitric oxide (NO) is now recognized as a key regulator of plant physiological processes. Understanding the mechanisms by which NO exerts its biological functions has been the subject of extensive research. Several components of the signaling pathways relaying NO effects in plants, including second messengers, protein kinases, phytohormones, and target genes, have been characterized. In addition, there is now compelling experimental evidence that NO partly operates through posttranslational modification of proteins, notably via S-nitrosylation and tyrosine nitration. Recently, proteome-wide scale analyses led to the identification of numerous protein candidates for S-nitrosylation in plants. Subsequent biochemical and in silico structural studies revealed certain mechanisms through which S-nitrosylation impacts their functions. Furthermore, first insights into the physiological relevance of S-nitrosylation, particularly in controlling plant immune responses, have been recently reported. Collectively, these discoveries greatly extend our knowledge of NO functions and of the molecular processes inherent to signal transduction in plants. [Copyright &y& Elsevier]
- Published
- 2012
- Full Text
- View/download PDF
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