1
|
Daniel C, Paris N, Pierre O, Griffon N, Breant S, Orlova N, Serre P, Leprovost D, Denglos S, Mouchet A, Dubiel J, Gozlan R, Chatellier G, Bey R, Frank M, Hassen-Khodja C, Mamzer MF, Hilka M. AP-HP Health Data Space (AHDS) to the Test of the Covid-19 Pandemic. Stud Health Technol Inform 2022; 294:28-32. [PMID: 35612010 DOI: 10.3233/shti220390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
UNLABELLED Sharing observational and interventional health data within a common data space enables university hospitals to leverage such data for biomedical discovery and moving towards a learning health system. OBJECTIVE To describe the AP-HP Health Data Space (AHDS) and the IT services supporting piloting, research, innovation and patient care. METHODS Built on three pillars - governance and ethics, technology and valorization - the AHDS and its major component, the Clinical Data Warehouse (CDW) have been developed since 2015. RESULTS The AP-HP CDW has been made available at scale to AP-HP both healthcare professionals and public or private partners in January 2017. Supported by an institutional secured and high-performance cloud and an ecosystem of tools, mostly open source, the AHDS integrates a large amount of massive healthcare data collected during care and research activities. As of December 2021, the AHDS operates the electronic data capture for almost +840 clinical trials sponsored by AP-HP, the CDW is enabling the processing of health data from more than 11 million patients and generated +200 secondary data marts from IRB authorized research projects. During the Covid-19 pandemic, AHDS has had to evolve quickly to support administrative professionals and caregivers heavily involved in the reorganization of both patient care and biomedical research. CONCLUSION The AP-HP Data Space is a key facilitator for data-driven evidence generation and making the health system more efficient and personalized.
Collapse
Affiliation(s)
- Christel Daniel
- Innovation and Data, IT Department, AP-HP, Paris, France
- LIMICS, F-75006, Paris, France
- Sorbonne Universités, Paris, France
| | - Nicolas Paris
- Innovation and Data, IT Department, AP-HP, Paris, France
| | - Olivier Pierre
- Innovation and Data, IT Department, AP-HP, Paris, France
| | - Nicolas Griffon
- Innovation and Data, IT Department, AP-HP, Paris, France
- LIMICS, F-75006, Paris, France
- Sorbonne Universités, Paris, France
| | | | - Nina Orlova
- Innovation and Data, IT Department, AP-HP, Paris, France
| | - Patricia Serre
- Innovation and Data, IT Department, AP-HP, Paris, France
| | - Damien Leprovost
- Innovation and Data, IT Department, AP-HP, Paris, France
- LIMICS, F-75006, Paris, France
- Sorbonne Universités, Paris, France
| | | | | | - Julien Dubiel
- Innovation and Data, IT Department, AP-HP, Paris, France
| | - Rafael Gozlan
- Innovation and Data, IT Department, AP-HP, Paris, France
| | | | - Romain Bey
- Innovation and Data, IT Department, AP-HP, Paris, France
| | - Marie Frank
- Department of Medical Information (DIM), Hôpitaux Universitaires Paris-Saclay, AP-HP Paris, France
| | | | | | - Martin Hilka
- Innovation and Data, IT Department, AP-HP, Paris, France
| |
Collapse
|
2
|
Pacoud M, Mandon K, Cazareth J, Pierre O, Frendo P, Alloing G. Redox-sensitive fluorescent biosensors detect Sinorhizobium meliloti intracellular redox changes under free-living and symbiotic lifestyles. Free Radic Biol Med 2022; 184:185-195. [PMID: 35390454 DOI: 10.1016/j.freeradbiomed.2022.03.030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Revised: 03/29/2022] [Accepted: 03/30/2022] [Indexed: 10/18/2022]
Abstract
Reactive oxygen species such as hydrogen peroxide (H2O2) are key signaling molecules that control the setup and functioning of Rhizobium-legume symbiosis. This interaction results in the formation of a new organ, the root nodule, in which bacteria enter the host cells and differentiate into nitrogen (N2)-fixing bacteroids. The interaction between Sinorhizobium meliloti and Medicago truncatula is a genetic model to study N2-fixing symbiosis. In previous work, S. meliloti mutants impaired in the antioxidant defense, showed altered symbiotic properties, emphasizing the importance of redox-based regulation in the bacterial partner. However, direct measurements of S. meliloti intracellular redox state have never been performed. Here, we measured dynamic changes of intracellular H2O2 and glutathione redox potential by expressing roGFP2-Orp1 and Grx1-roGFP2 biosensors in S. meliloti. Kinetic analyses of redox changes under free-living conditions showed that these biosensors are suitable to monitor the bacterial redox state in real-time, after H2O2 challenge and in different genetic backgrounds. In planta, flow cytometry and confocal imaging experiments allowed the determination of sensor oxidation state in nodule bacteria. These cellular studies establish the existence of an oxidative shift in the redox status of S. meliloti during bacteroid differentiation. Our findings open up new possibilities for in vivo studies of redox dynamics during N2-fixing symbiosis.
Collapse
Affiliation(s)
- Marie Pacoud
- Université Côte d'Azur, INRAE, CNRS, ISA, Sophia-Antipolis, France
| | - Karine Mandon
- Université Côte d'Azur, INRAE, CNRS, ISA, Sophia-Antipolis, France
| | - Julie Cazareth
- Institut de Pharmacologie Moléculaire et Cellulaire, CNRS UMR 7275, Université Côte d'Azur, Valbonne, France
| | - Olivier Pierre
- Université Côte d'Azur, INRAE, CNRS, ISA, Sophia-Antipolis, France
| | - Pierre Frendo
- Université Côte d'Azur, INRAE, CNRS, ISA, Sophia-Antipolis, France
| | | |
Collapse
|
3
|
Pierre O, Riveros C, Charpy S, Boutron I. Secondary electronic sources demonstrated very good sensitivity for identifying studies evaluating interventions for COVID-19. J Clin Epidemiol 2021; 141:46-53. [PMID: 34555426 PMCID: PMC8451522 DOI: 10.1016/j.jclinepi.2021.09.022] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2021] [Revised: 09/06/2021] [Accepted: 09/15/2021] [Indexed: 11/11/2022]
Abstract
Objectives To assess the sensitivity of two secondary electronic sources of COVID-19 studies: 1) the Cochrane COVID-19 Study Register (https://covid-19.cochrane.org/); and, 2) the Living Overview of the Evidence (L•OVE) COVID-19 platform (https://iloveevidence.com/). Study design and setting We identified reports of randomized controlled trials (RCTs) and observational studies (OS) assessing preventive interventions or treatment for COVID-19. The reference standard comprised all reports included in the COVID-NMA platform (covid-nma.com), in two major living systematic reviews of RCTs assessing pharmacologic treatment of COVID-19, or identified in either of the two secondary sources evaluated. The search for all sources was conducted through September 7, 2020. Our primary outcome was the proportion of the reports included in the reference standard that were identified by each secondary source. Results We identified 680 reports, 91 RCT reports, 97 RCT protocols, and 492 OS reports. The Cochrane COVID-19 Study Register identified 88% [95% confidence interval, 79–94] of the RCT reports, 90% [82–95] of the RCT protocols, and 82% [78–85] of the OS reports. The L•OVE platform identified 100% [97–100] of the RCT reports and RCT protocols and 100% [99–100] of the OS reports. Conclusion These platforms proved to be a viable screening alternative to searching every individual source.
Collapse
Affiliation(s)
- Olivier Pierre
- Université de Paris, UMR 1153 CRESS Inserm, 75004, Paris, France; Clinical Epidemiology Unit, Hôtel-Dieu Hospital, Assistance Publique-Hôpitaux de Paris, (AP-HP), 75004, Paris, France; Cochrane France, Hôtel-Dieu Hospital, 75004, Paris, France
| | - Carolina Riveros
- Université de Paris, UMR 1153 CRESS Inserm, 75004, Paris, France; Clinical Epidemiology Unit, Hôtel-Dieu Hospital, Assistance Publique-Hôpitaux de Paris, (AP-HP), 75004, Paris, France; Cochrane France, Hôtel-Dieu Hospital, 75004, Paris, France
| | - Sarah Charpy
- Université de Paris, UMR 1153 CRESS Inserm, 75004, Paris, France; Clinical Epidemiology Unit, Hôtel-Dieu Hospital, Assistance Publique-Hôpitaux de Paris, (AP-HP), 75004, Paris, France; Cochrane France, Hôtel-Dieu Hospital, 75004, Paris, France
| | - Isabelle Boutron
- Université de Paris, UMR 1153 CRESS Inserm, 75004, Paris, France; Clinical Epidemiology Unit, Hôtel-Dieu Hospital, Assistance Publique-Hôpitaux de Paris, (AP-HP), 75004, Paris, France; Cochrane France, Hôtel-Dieu Hospital, 75004, Paris, France.
| |
Collapse
|
4
|
Oikonomidi T, Boutron I, Pierre O, Cabanac G, Ravaud P. Changes in evidence for studies assessing interventions for COVID-19 reported in preprints: meta-research study. BMC Med 2020; 18:402. [PMID: 33334338 PMCID: PMC7745199 DOI: 10.1186/s12916-020-01880-8] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/03/2020] [Accepted: 12/04/2020] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The increasing use of preprints to disseminate evidence on the effect of interventions for the coronavirus disease 2019 (COVID-19) can lead to multiple evidence sources for a single study, which may differ in the reported evidence. We aim to describe the proportion of evidence on the effect of interventions for COVID-19 from preprints and journal articles and map changes in evidence between and within different sources reporting on the same study. METHODS Meta-research study. We screened the Cochrane living systematic review and network meta-analysis (COVID-NMA) database to identify all preprints and journal articles on all studies assessing interventions for COVID-19 published up to 15 August 2020. We compared all evidence sources (i.e., preprint and associated journal article) and the first and latest versions of preprints for each study to identify changes in two evidence components: study results (e.g., numeric change in hazard ratio, odds ratio, event rate, or change in p value > or < 0.05 in any outcome) and abstract conclusions (classified as positive, negative or neutral regarding the intervention effect, and as reporting uncertainty in the findings or not). Changes in study results were further classified as important changes if they (1) represented a change in any effect estimate by ≥ 10% and/or (2) led to a change in the p value crossing the threshold of 0.05. RESULTS We identified 556 studies. In total, 338 (61%) had been reported in a preprint: 66 (20%) of these had an associated journal article (median time to publication 76 days [interquartile range (IQR) 55-106]) and 91 (27%) had > 1 preprint version. A total of 139 studies (25% of the overall sample) were reported in multiple evidence sources or versions of the same source: for 63 (45%), there was a change in at least one evidence component between or within sources (42 [30%] had a change in study results, and in 29 [21%] the change was classified as important; 33 [24%] had a change in the abstract conclusion). For studies with both a preprint and an article, a median of 29% (IQR 14-50) of total citations were attributed to the preprint instead of the article. CONCLUSIONS Results on the effect of interventions for COVID-19 are often reported in multiple evidence sources or source versions for a single study. Evidence is not stable between and within evidence sources. Real-time linkage of all sources per study could help to keep systematic reviews up-to-date.
Collapse
Affiliation(s)
- Theodora Oikonomidi
- Université de Paris, UMR 1153 CRESS Inserm, 75004 Paris, France
- Clinical Epidemiology Unit, Hôtel-Dieu Hospital, Assistance Publique-Hôpitaux de Paris, (AP-HP), 75004 Paris, France
- Cochrane France, Hôtel-Dieu Hospital, 75004 Paris, France
| | - Isabelle Boutron
- Université de Paris, UMR 1153 CRESS Inserm, 75004 Paris, France
- Clinical Epidemiology Unit, Hôtel-Dieu Hospital, Assistance Publique-Hôpitaux de Paris, (AP-HP), 75004 Paris, France
- Cochrane France, Hôtel-Dieu Hospital, 75004 Paris, France
| | - Olivier Pierre
- Université de Paris, UMR 1153 CRESS Inserm, 75004 Paris, France
- Clinical Epidemiology Unit, Hôtel-Dieu Hospital, Assistance Publique-Hôpitaux de Paris, (AP-HP), 75004 Paris, France
- Cochrane France, Hôtel-Dieu Hospital, 75004 Paris, France
| | - Guillaume Cabanac
- University of Toulouse, IRIT UMR 5505 CNRS, 118 route de Narbonne, 31062 Toulouse Cedex 9, France
| | - Philippe Ravaud
- Université de Paris, UMR 1153 CRESS Inserm, 75004 Paris, France
- Clinical Epidemiology Unit, Hôtel-Dieu Hospital, Assistance Publique-Hôpitaux de Paris, (AP-HP), 75004 Paris, France
- Cochrane France, Hôtel-Dieu Hospital, 75004 Paris, France
- Department of Epidemiology, Mailman School of Public Health, Columbia University, New York, NY USA
| | - the COVID-19 NMA Consortium
- Université de Paris, UMR 1153 CRESS Inserm, 75004 Paris, France
- Clinical Epidemiology Unit, Hôtel-Dieu Hospital, Assistance Publique-Hôpitaux de Paris, (AP-HP), 75004 Paris, France
- Cochrane France, Hôtel-Dieu Hospital, 75004 Paris, France
- University of Toulouse, IRIT UMR 5505 CNRS, 118 route de Narbonne, 31062 Toulouse Cedex 9, France
- Department of Epidemiology, Mailman School of Public Health, Columbia University, New York, NY USA
| |
Collapse
|
5
|
Pierre O, Fouchard M, Le Goux N, Buscaglia P, Leschiera R, Mignen O, Misery L, Le Garrec R. La ciguatoxine-2 du Pacifique et la brévétoxine-1 entraînent la sensibilisation de récepteurs sensoriels impliqués dans le prurit. Ann Dermatol Venereol 2020. [DOI: 10.1016/j.annder.2020.09.087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
6
|
Yang L, El Msehli S, Benyamina S, Lambert A, Hopkins J, Cazareth J, Pierre O, Hérouart D, Achi-Smiti S, Boncompagni E, Frendo P. Glutathione Deficiency in Sinorhizobium meliloti Does Not Impair Bacteroid Differentiation But Induces Early Senescence in the Interaction With Medicago truncatula. Front Plant Sci 2020; 11:137. [PMID: 32194584 PMCID: PMC7063052 DOI: 10.3389/fpls.2020.00137] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/17/2019] [Accepted: 01/29/2020] [Indexed: 06/10/2023]
Abstract
Under nitrogen-limiting conditions, legumes are able to interact symbiotically with bacteria of the Rhizobiaceae family. This interaction gives rise to a new organ, named a root nodule. Root nodules are characterized by an increased glutathione (GSH) and homoglutathione (hGSH) content compared to roots. These low molecular thiols are very important in the biological nitrogen fixation. In order to characterize the modification of nodule activity induced by the microsymbiont glutathione deficiency, physiological, biochemical, and gene expression modifications were analyzed in nodules after the inoculation of Medicago truncatula with the SmgshB mutant of Sinorhizobium meliloti which is deficient in GSH production. The decline in nitrogen fixation efficiency was correlated to the reduction in plant shoot biomass. Flow cytometry analysis showed that SmgshB bacteroids present a higher DNA content than free living bacteria. Live/dead microscopic analysis showed an early bacteroid degradation in SmgshB nodules compared to control nodules which is correlated to a lower bacteroid content at 20 dpi. Finally, the expression of two marker genes involved in nitrogen fixation metabolism, Leghemoglobin and Nodule Cysteine Rich Peptide 001, decreased significantly in mutant nodules at 20 dpi. In contrast, the expression of two marker genes involved in the nodule senescence, Cysteine Protease 6 and Purple Acid Protease, increased significantly in mutant nodules at 10 dpi strengthening the idea that an early senescence process occurs in SmgshB nodules. In conclusion, our results showed that bacterial GSH deficiency does not impair bacterial differentiation but induces an early nodule senescence.
Collapse
Affiliation(s)
- Li Yang
- Université Côte d'Azur, INRA, CNRS, ISA, Sophia-Antipolis, France
| | - Sarra El Msehli
- Laboratoire de Physiologie Végétale, Faculté des Sciences de Tunis, Campus Universitaire El Manar II, Tunis, Tunisia
| | | | - Annie Lambert
- Université Côte d'Azur, INRA, CNRS, ISA, Sophia-Antipolis, France
| | - Julie Hopkins
- Université Côte d'Azur, INRA, CNRS, ISA, Sophia-Antipolis, France
| | - Julie Cazareth
- Institut de Pharmacologie Moléculaire et Cellulaire, CNRS UMR 7275, Université Côte d'Azur, Valbonne, France
| | - Olivier Pierre
- Université Côte d'Azur, INRA, CNRS, ISA, Sophia-Antipolis, France
| | - Didier Hérouart
- Université Côte d'Azur, INRA, CNRS, ISA, Sophia-Antipolis, France
| | - Samira Achi-Smiti
- Laboratoire de Physiologie Végétale, Faculté des Sciences de Tunis, Campus Universitaire El Manar II, Tunis, Tunisia
| | - Eric Boncompagni
- Université Côte d'Azur, INRA, CNRS, ISA, Sophia-Antipolis, France
| | - Pierre Frendo
- Université Côte d'Azur, INRA, CNRS, ISA, Sophia-Antipolis, France
| |
Collapse
|
7
|
Fouchard M, Pierre O, Misery L, Le Garrec R. Effets secondaires sensoriels cutanés du paclitaxel : sensibilisation de canaux ioniques neuronaux dans le contexte épidermique. Ann Dermatol Venereol 2019. [DOI: 10.1016/j.annder.2019.09.535] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
8
|
Pierre O, L’Herondelle K, Fouyet S, Leschiera R, Le Gall - Ianotto C, Philippe R, Buscaglia P, Mignen O, Misery L, Le Garrec R. 334 Involvement of cathepsin S and protease-activated receptor-2 in ciguatoxin-induced substance P release: new promising targets to treat ciguatera pruritus. J Invest Dermatol 2019. [DOI: 10.1016/j.jid.2019.07.336] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
9
|
Wan B, Goguet E, Ravallec M, Pierre O, Lemauf S, Volkoff AN, Gatti JL, Poirié M. Venom Atypical Extracellular Vesicles as Interspecies Vehicles of Virulence Factors Involved in Host Specificity: The Case of a Drosophila Parasitoid Wasp. Front Immunol 2019; 10:1688. [PMID: 31379874 PMCID: PMC6653201 DOI: 10.3389/fimmu.2019.01688] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Accepted: 07/04/2019] [Indexed: 01/30/2023] Open
Abstract
Endoparasitoid wasps, which lay eggs inside the bodies of other insects, use various strategies to protect their offspring from the host immune response. The hymenopteran species of the genus Leptopilina, parasites of Drosophila, rely on the injection of a venom which contains proteins and peculiar vesicles (hereafter venosomes). We show here that the injection of purified L. boulardi venosomes is sufficient to impair the function of the Drosophila melanogaster lamellocytes, a hemocyte type specialized in the defense against wasp eggs, and thus the parasitic success of the wasp. These venosomes seem to have a unique extracellular biogenesis in the wasp venom apparatus where they acquire specific secreted proteins/virulence factors and act as a transport system to deliver these compounds into host lamellocytes. The level of venosomes entry into lamellocytes of different Drosophila species was correlated with the rate of parasitism success of the wasp, suggesting that this venosome-cell interaction may represent a new evolutionary level of host-parasitoid specificity.
Collapse
Affiliation(s)
- Bin Wan
- Université Côte d'Azur, INRA, CNRS, ISA, Sophia Antipolis, France
| | - Emilie Goguet
- Université Côte d'Azur, INRA, CNRS, ISA, Sophia Antipolis, France
| | - Marc Ravallec
- INRA, Univ. Montpellier, UMR 1333 "Microorganism and Insect Diversity, Genomes and Interactions" (DGIMI), Montpellier, France
| | - Olivier Pierre
- Université Côte d'Azur, INRA, CNRS, ISA, Sophia Antipolis, France
| | - Séverine Lemauf
- Université Côte d'Azur, INRA, CNRS, ISA, Sophia Antipolis, France
| | - Anne-Nathalie Volkoff
- INRA, Univ. Montpellier, UMR 1333 "Microorganism and Insect Diversity, Genomes and Interactions" (DGIMI), Montpellier, France
| | - Jean-Luc Gatti
- Université Côte d'Azur, INRA, CNRS, ISA, Sophia Antipolis, France
| | - Marylène Poirié
- Université Côte d'Azur, INRA, CNRS, ISA, Sophia Antipolis, France
| |
Collapse
|
10
|
Lamouche F, Gully D, Chaumeret A, Nouwen N, Verly C, Pierre O, Sciallano C, Fardoux J, Jeudy C, Szücs A, Mondy S, Salon C, Nagy I, Kereszt A, Dessaux Y, Giraud E, Mergaert P, Alunni B. Transcriptomic dissection of Bradyrhizobium sp. strain ORS285 in symbiosis with Aeschynomene spp. inducing different bacteroid morphotypes with contrasted symbiotic efficiency. Environ Microbiol 2018; 21:3244-3258. [PMID: 29921018 DOI: 10.1111/1462-2920.14292] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2017] [Revised: 05/18/2017] [Accepted: 05/19/2017] [Indexed: 11/29/2022]
Abstract
To circumvent the paucity of nitrogen sources in the soil legume plants establish a symbiotic interaction with nitrogen-fixing soil bacteria called rhizobia. During symbiosis, the plants form root organs called nodules, where bacteria are housed intracellularly and become active nitrogen fixers known as bacteroids. Depending on their host plant, bacteroids can adopt different morphotypes, being either unmodified (U), elongated (E) or spherical (S). E- and S-type bacteroids undergo a terminal differentiation leading to irreversible morphological changes and DNA endoreduplication. Previous studies suggest that differentiated bacteroids display an increased symbiotic efficiency (E > U and S > U). In this study, we used a combination of Aeschynomene species inducing E- or S-type bacteroids in symbiosis with Bradyrhizobium sp. ORS285 to show that S-type bacteroids present a better symbiotic efficiency than E-type bacteroids. We performed a transcriptomic analysis on E- and S-type bacteroids formed by Aeschynomene afraspera and Aeschynomene indica nodules and identified the bacterial functions activated in bacteroids and specific to each bacteroid type. Extending the expression analysis in E- and S-type bacteroids in other Aeschynomene species by qRT-PCR on selected genes from the transcriptome analysis narrowed down the set of bacteroid morphotype-specific genes. Functional analysis of a selected subset of 31 bacteroid-induced or morphotype-specific genes revealed no symbiotic phenotypes in the mutants. This highlights the robustness of the symbiotic program but could also indicate that the bacterial response to the plant environment is partially anticipatory or even maladaptive. Our analysis confirms the correlation between differentiation and efficiency of the bacteroids and provides a framework for the identification of bacterial functions that affect the efficiency of bacteroids.© 2018 Society for Applied Microbiology and John Wiley & Sons Ltd.
Collapse
Affiliation(s)
- Florian Lamouche
- Institute for Integrative Biology of the Cell, UMR 9198, CNRS/Université Paris-Sud/CEA, 91198, Gif-sur-Yvette, France
| | - Djamel Gully
- Laboratoire des Symbioses Tropicales et Méditerranéennes, Institut pour la Recherche et le Développement, UMR IRD/SupAgro/INRA/UM2/CIRAD, Campus International de Baillarguet, TA A-82/J, Montpellier, 34398, France
| | - Anaïs Chaumeret
- Institute for Integrative Biology of the Cell, UMR 9198, CNRS/Université Paris-Sud/CEA, 91198, Gif-sur-Yvette, France
| | - Nico Nouwen
- Laboratoire des Symbioses Tropicales et Méditerranéennes, Institut pour la Recherche et le Développement, UMR IRD/SupAgro/INRA/UM2/CIRAD, Campus International de Baillarguet, TA A-82/J, Montpellier, 34398, France
| | - Camille Verly
- Institute for Integrative Biology of the Cell, UMR 9198, CNRS/Université Paris-Sud/CEA, 91198, Gif-sur-Yvette, France
| | - Olivier Pierre
- Institute for Integrative Biology of the Cell, UMR 9198, CNRS/Université Paris-Sud/CEA, 91198, Gif-sur-Yvette, France
| | - Coline Sciallano
- Laboratoire des Symbioses Tropicales et Méditerranéennes, Institut pour la Recherche et le Développement, UMR IRD/SupAgro/INRA/UM2/CIRAD, Campus International de Baillarguet, TA A-82/J, Montpellier, 34398, France
| | - Joël Fardoux
- Laboratoire des Symbioses Tropicales et Méditerranéennes, Institut pour la Recherche et le Développement, UMR IRD/SupAgro/INRA/UM2/CIRAD, Campus International de Baillarguet, TA A-82/J, Montpellier, 34398, France
| | - Christian Jeudy
- Agroécologie, AgroSup Dijon, INRA, Université Bourgogne Franche-Comté, Dijon, 21065, France
| | - Attila Szücs
- Biological Research Centre, Hungarian Academy of Sciences, Szeged, 6726, Hungary
| | - Samuel Mondy
- Institute for Integrative Biology of the Cell, UMR 9198, CNRS/Université Paris-Sud/CEA, 91198, Gif-sur-Yvette, France
| | - Christophe Salon
- Agroécologie, AgroSup Dijon, INRA, Université Bourgogne Franche-Comté, Dijon, 21065, France
| | - István Nagy
- Biological Research Centre, Hungarian Academy of Sciences, Szeged, 6726, Hungary
- Seqomics Biotechnology Ltd, Mórahalom, 6782, Hungary
| | - Attila Kereszt
- Biological Research Centre, Hungarian Academy of Sciences, Szeged, 6726, Hungary
- Seqomics Biotechnology Ltd, Mórahalom, 6782, Hungary
| | - Yves Dessaux
- Institute for Integrative Biology of the Cell, UMR 9198, CNRS/Université Paris-Sud/CEA, 91198, Gif-sur-Yvette, France
| | - Eric Giraud
- Laboratoire des Symbioses Tropicales et Méditerranéennes, Institut pour la Recherche et le Développement, UMR IRD/SupAgro/INRA/UM2/CIRAD, Campus International de Baillarguet, TA A-82/J, Montpellier, 34398, France
| | - Peter Mergaert
- Institute for Integrative Biology of the Cell, UMR 9198, CNRS/Université Paris-Sud/CEA, 91198, Gif-sur-Yvette, France
| | - Benoit Alunni
- Institute for Integrative Biology of the Cell, UMR 9198, CNRS/Université Paris-Sud/CEA, 91198, Gif-sur-Yvette, France
| |
Collapse
|
11
|
Huet F, Severino-Freire M, Chéret J, Gouin O, Praneuf J, Pierre O, Misery L, Le Gall-Ianotto C. Reconstructed human epidermis for in vitro studies on atopic dermatitis: A review. J Dermatol Sci 2018; 89:213-218. [DOI: 10.1016/j.jdermsci.2017.11.015] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2017] [Revised: 11/15/2017] [Accepted: 11/27/2017] [Indexed: 11/24/2022]
|
12
|
Barrière Q, Guefrachi I, Gully D, Lamouche F, Pierre O, Fardoux J, Chaintreuil C, Alunni B, Timchenko T, Giraud E, Mergaert P. Integrated roles of BclA and DD-carboxypeptidase 1 in Bradyrhizobium differentiation within NCR-producing and NCR-lacking root nodules. Sci Rep 2017; 7:9063. [PMID: 28831061 PMCID: PMC5567381 DOI: 10.1038/s41598-017-08830-0] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2017] [Accepted: 07/12/2017] [Indexed: 11/09/2022] Open
Abstract
Legumes harbor in their symbiotic nodule organs nitrogen fixing rhizobium bacteria called bacteroids. Some legumes produce Nodule-specific Cysteine-Rich (NCR) peptides in the nodule cells to control the intracellular bacterial population. NCR peptides have antimicrobial activity and drive bacteroids toward terminal differentiation. Other legumes do not produce NCR peptides and their bacteroids are not differentiated. Bradyrhizobia, infecting NCR-producing Aeschynomene plants, require the peptide uptake transporter BclA to cope with the NCR peptides as well as a specific peptidoglycan-modifying DD-carboxypeptidase, DD-CPase1. We show that Bradyrhizobium diazoefficiens strain USDA110 forms undifferentiated bacteroids in NCR-lacking soybean nodules. Unexpectedly, in Aeschynomene afraspera nodules the nitrogen fixing USDA110 bacteroids are hardly differentiated despite the fact that this host produces NCR peptides, suggesting that USDA110 is insensitive to the host peptide effectors and that nitrogen fixation can be uncoupled from differentiation. In agreement with the absence of bacteroid differentiation, USDA110 does not require its bclA gene for nitrogen fixing symbiosis with these two host plants. Furthermore, we show that the BclA and DD-CPase1 act independently in the NCR-induced morphological differentiation of bacteroids. Our results suggest that BclA is required to protect the rhizobia against the NCR stress but not to induce the terminal differentiation pathway.
Collapse
Affiliation(s)
- Quentin Barrière
- Institute for Integrative Biology of the Cell, UMR9198, CNRS, Université Paris-Sud, CEA, Gif-sur-Yvette, France
| | - Ibtissem Guefrachi
- Institute for Integrative Biology of the Cell, UMR9198, CNRS, Université Paris-Sud, CEA, Gif-sur-Yvette, France.,Research Unit Biodiversity & Valorization of Arid Areas Bioressources (BVBAA), Faculty of Sciences, Gabès University, Erriadh-Zrig, 6072, Gabès, Tunisia.,Université de Pau et des Pays de l'Adour, Pau, France
| | - Djamel Gully
- Laboratoire des Symbioses Tropicales et Méditerranéennes, Institut pour la Recherche et le Développement, UMR IRD/SupAgro/INRA/UM2/CIRAD, Campus International de Baillarguet, TA A-82/J, 34398, Montpellier Cedex 5, France
| | - Florian Lamouche
- Institute for Integrative Biology of the Cell, UMR9198, CNRS, Université Paris-Sud, CEA, Gif-sur-Yvette, France
| | - Olivier Pierre
- Institute for Integrative Biology of the Cell, UMR9198, CNRS, Université Paris-Sud, CEA, Gif-sur-Yvette, France.,Institut Sophia AgroBiotech, Sophia-Antipolis, France
| | - Joël Fardoux
- Laboratoire des Symbioses Tropicales et Méditerranéennes, Institut pour la Recherche et le Développement, UMR IRD/SupAgro/INRA/UM2/CIRAD, Campus International de Baillarguet, TA A-82/J, 34398, Montpellier Cedex 5, France
| | - Clémence Chaintreuil
- Laboratoire des Symbioses Tropicales et Méditerranéennes, Institut pour la Recherche et le Développement, UMR IRD/SupAgro/INRA/UM2/CIRAD, Campus International de Baillarguet, TA A-82/J, 34398, Montpellier Cedex 5, France
| | - Benoît Alunni
- Institute for Integrative Biology of the Cell, UMR9198, CNRS, Université Paris-Sud, CEA, Gif-sur-Yvette, France
| | - Tatiana Timchenko
- Institute for Integrative Biology of the Cell, UMR9198, CNRS, Université Paris-Sud, CEA, Gif-sur-Yvette, France
| | - Eric Giraud
- Laboratoire des Symbioses Tropicales et Méditerranéennes, Institut pour la Recherche et le Développement, UMR IRD/SupAgro/INRA/UM2/CIRAD, Campus International de Baillarguet, TA A-82/J, 34398, Montpellier Cedex 5, France
| | - Peter Mergaert
- Institute for Integrative Biology of the Cell, UMR9198, CNRS, Université Paris-Sud, CEA, Gif-sur-Yvette, France.
| |
Collapse
|
13
|
Antonino de Souza Junior JD, Pierre O, Coelho RR, Grossi-de-Sa MF, Engler G, de Almeida Engler J. Application of Nuclear Volume Measurements to Comprehend the Cell Cycle in Root-Knot Nematode-Induced Giant Cells. Front Plant Sci 2017; 8:961. [PMID: 28659939 PMCID: PMC5466992 DOI: 10.3389/fpls.2017.00961] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2017] [Accepted: 05/22/2017] [Indexed: 05/12/2023]
Abstract
Root-knot nematodes induce galls that contain giant-feeding cells harboring multiple enlarged nuclei within the roots of host plants. It is recognized that the cell cycle plays an essential role in the set-up of a peculiar nuclear organization that seemingly steers nematode feeding site induction and development. Functional studies of a large set of cell cycle genes in transgenic lines of the model host Arabidopsis thaliana have contributed to better understand the role of the cell cycle components and their implication in the establishment of functional galls. Mitotic activity mainly occurs during the initial stages of gall development and is followed by an intense endoreduplication phase imperative to produce giant-feeding cells, essential to form vigorous galls. Transgenic lines overexpressing particular cell cycle genes can provoke severe nuclei phenotype changes mainly at later stages of feeding site development. This can result in chaotic nuclear phenotypes affecting their volume. These aberrant nuclear organizations are hampering gall development and nematode maturation. Herein we report on two nuclear volume assessment methods which provide information on the complex changes occurring in nuclei during giant cell development. Although we observed that the data obtained with AMIRA tend to be more detailed than Volumest (Image J), both approaches proved to be highly versatile, allowing to access 3D morphological changes in nuclei of complex tissues and organs. The protocol presented here is based on standard confocal optical sectioning and 3-D image analysis and can be applied to study any volume and shape of cellular organelles in various complex biological specimens. Our results suggest that an increase in giant cell nuclear volume is not solely linked to increasing ploidy levels, but might result from the accumulation of mitotic defects.
Collapse
Affiliation(s)
- José Dijair Antonino de Souza Junior
- Institut National de la Recherche Agronomique, Université Côte d’Azur, Centre National de la Recherche Scientifique, Institut Sophia AgrobiotechSophia-Antipolis, France
- Laboratório de Interação Molecular Planta-Praga, Embrapa Recursos Genéticos e BiotecnologiaBrasília, Brazil
| | - Olivier Pierre
- Institut National de la Recherche Agronomique, Université Côte d’Azur, Centre National de la Recherche Scientifique, Institut Sophia AgrobiotechSophia-Antipolis, France
| | - Roberta R. Coelho
- Institut National de la Recherche Agronomique, Université Côte d’Azur, Centre National de la Recherche Scientifique, Institut Sophia AgrobiotechSophia-Antipolis, France
- Laboratório de Interação Molecular Planta-Praga, Embrapa Recursos Genéticos e BiotecnologiaBrasília, Brazil
| | - Maria F. Grossi-de-Sa
- Laboratório de Interação Molecular Planta-Praga, Embrapa Recursos Genéticos e BiotecnologiaBrasília, Brazil
| | - Gilbert Engler
- Institut National de la Recherche Agronomique, Université Côte d’Azur, Centre National de la Recherche Scientifique, Institut Sophia AgrobiotechSophia-Antipolis, France
| | - Janice de Almeida Engler
- Institut National de la Recherche Agronomique, Université Côte d’Azur, Centre National de la Recherche Scientifique, Institut Sophia AgrobiotechSophia-Antipolis, France
- *Correspondence: Janice de Almeida Engler,
| |
Collapse
|
14
|
Ribeiro CW, Baldacci-Cresp F, Pierre O, Larousse M, Benyamina S, Lambert A, Hopkins J, Castella C, Cazareth J, Alloing G, Boncompagni E, Couturier J, Mergaert P, Gamas P, Rouhier N, Montrichard F, Frendo P. Regulation of Differentiation of Nitrogen-Fixing Bacteria by Microsymbiont Targeting of Plant Thioredoxin s1. Curr Biol 2016; 27:250-256. [PMID: 28017611 DOI: 10.1016/j.cub.2016.11.013] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2016] [Revised: 10/10/2016] [Accepted: 11/04/2016] [Indexed: 11/16/2022]
Abstract
Legumes associate with rhizobia to form nitrogen (N2)-fixing nodules, which is important for plant fitness [1, 2]. Medicago truncatula controls the terminal differentiation of Sinorhizobium meliloti into N2-fixing bacteroids by producing defensin-like nodule-specific cysteine-rich peptides (NCRs) [3, 4]. The redox state of NCRs influences some biological activities in free-living bacteria, but the relevance of redox regulation of NCRs in planta is unknown [5, 6], although redox regulation plays a crucial role in symbiotic nitrogen fixation [7, 8]. Two thioredoxins (Trx), Trx s1 and s2, define a new type of Trx and are expressed principally in nodules [9]. Here, we show that there are four Trx s genes, two of which, Trx s1 and s3, are induced in the nodule infection zone where bacterial differentiation occurs. Trx s1 is targeted to the symbiosomes, the N2-fixing organelles. Trx s1 interacted with NCR247 and NCR335 and increased the cytotoxic effect of NCR335 in S. meliloti. We show that Trx s silencing impairs bacteroid growth and endoreduplication, two features of terminal bacteroid differentiation, and that the ectopic expression of Trx s1 in S. meliloti partially complements the silencing phenotype. Thus, our findings show that Trx s1 is targeted to the bacterial endosymbiont, where it controls NCR activity and bacteroid terminal differentiation. Similarly, Trxs are critical for the activation of defensins produced against infectious microbes in mammalian hosts. Therefore, our results suggest the Trx-mediated regulation of host peptides as a conserved mechanism among symbiotic and pathogenic interactions.
Collapse
Affiliation(s)
- Carolina Werner Ribeiro
- Institut Sophia Agrobiotech, Université de Nice-Sophia Antipolis, 400 Route des Chappes, BP167, 06903 Sophia Antipolis Cedex, France; Institut Sophia Agrobiotech, INRA UMR 1355, 400 Route des Chappes, BP167, 06903 Sophia Antipolis Cedex, France; Institut Sophia Agrobiotech, CNRS UMR 7254, 400 Route des Chappes, BP167, 06903 Sophia Antipolis Cedex, France
| | - Fabien Baldacci-Cresp
- Institut Sophia Agrobiotech, Université de Nice-Sophia Antipolis, 400 Route des Chappes, BP167, 06903 Sophia Antipolis Cedex, France; Institut Sophia Agrobiotech, INRA UMR 1355, 400 Route des Chappes, BP167, 06903 Sophia Antipolis Cedex, France; Institut Sophia Agrobiotech, CNRS UMR 7254, 400 Route des Chappes, BP167, 06903 Sophia Antipolis Cedex, France
| | - Olivier Pierre
- Institut Sophia Agrobiotech, Université de Nice-Sophia Antipolis, 400 Route des Chappes, BP167, 06903 Sophia Antipolis Cedex, France; Institut Sophia Agrobiotech, INRA UMR 1355, 400 Route des Chappes, BP167, 06903 Sophia Antipolis Cedex, France; Institut Sophia Agrobiotech, CNRS UMR 7254, 400 Route des Chappes, BP167, 06903 Sophia Antipolis Cedex, France
| | - Marie Larousse
- Institut Sophia Agrobiotech, Université de Nice-Sophia Antipolis, 400 Route des Chappes, BP167, 06903 Sophia Antipolis Cedex, France; Institut Sophia Agrobiotech, INRA UMR 1355, 400 Route des Chappes, BP167, 06903 Sophia Antipolis Cedex, France; Institut Sophia Agrobiotech, CNRS UMR 7254, 400 Route des Chappes, BP167, 06903 Sophia Antipolis Cedex, France
| | - Sofiane Benyamina
- Institut Sophia Agrobiotech, Université de Nice-Sophia Antipolis, 400 Route des Chappes, BP167, 06903 Sophia Antipolis Cedex, France; Institut Sophia Agrobiotech, INRA UMR 1355, 400 Route des Chappes, BP167, 06903 Sophia Antipolis Cedex, France; Institut Sophia Agrobiotech, CNRS UMR 7254, 400 Route des Chappes, BP167, 06903 Sophia Antipolis Cedex, France
| | - Annie Lambert
- Institut Sophia Agrobiotech, Université de Nice-Sophia Antipolis, 400 Route des Chappes, BP167, 06903 Sophia Antipolis Cedex, France; Institut Sophia Agrobiotech, INRA UMR 1355, 400 Route des Chappes, BP167, 06903 Sophia Antipolis Cedex, France; Institut Sophia Agrobiotech, CNRS UMR 7254, 400 Route des Chappes, BP167, 06903 Sophia Antipolis Cedex, France
| | - Julie Hopkins
- Institut Sophia Agrobiotech, Université de Nice-Sophia Antipolis, 400 Route des Chappes, BP167, 06903 Sophia Antipolis Cedex, France; Institut Sophia Agrobiotech, INRA UMR 1355, 400 Route des Chappes, BP167, 06903 Sophia Antipolis Cedex, France; Institut Sophia Agrobiotech, CNRS UMR 7254, 400 Route des Chappes, BP167, 06903 Sophia Antipolis Cedex, France
| | - Claude Castella
- Institut Sophia Agrobiotech, Université de Nice-Sophia Antipolis, 400 Route des Chappes, BP167, 06903 Sophia Antipolis Cedex, France; Institut Sophia Agrobiotech, INRA UMR 1355, 400 Route des Chappes, BP167, 06903 Sophia Antipolis Cedex, France; Institut Sophia Agrobiotech, CNRS UMR 7254, 400 Route des Chappes, BP167, 06903 Sophia Antipolis Cedex, France
| | - Julie Cazareth
- Institut de Pharmacologie Moléculaire et Cellulaire, CNRS UMR 7275, Université Côte d'Azur, Sophia Antipolis, 660 Route des Lucioles, Valbonne 06560, France
| | - Geneviève Alloing
- Institut Sophia Agrobiotech, Université de Nice-Sophia Antipolis, 400 Route des Chappes, BP167, 06903 Sophia Antipolis Cedex, France; Institut Sophia Agrobiotech, INRA UMR 1355, 400 Route des Chappes, BP167, 06903 Sophia Antipolis Cedex, France; Institut Sophia Agrobiotech, CNRS UMR 7254, 400 Route des Chappes, BP167, 06903 Sophia Antipolis Cedex, France
| | - Eric Boncompagni
- Institut Sophia Agrobiotech, Université de Nice-Sophia Antipolis, 400 Route des Chappes, BP167, 06903 Sophia Antipolis Cedex, France; Institut Sophia Agrobiotech, INRA UMR 1355, 400 Route des Chappes, BP167, 06903 Sophia Antipolis Cedex, France; Institut Sophia Agrobiotech, CNRS UMR 7254, 400 Route des Chappes, BP167, 06903 Sophia Antipolis Cedex, France
| | - Jérémy Couturier
- Université de Lorraine, Interactions Arbres-Microorganismes, UMR1136, 54500 Vandoeuvre-lès-Nancy, France; INRA, Interactions Arbres-Microorganismes, UMR1136, 54280 Champenoux, France
| | - Peter Mergaert
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, University Paris-Sud, Université Paris-Saclay, 91198 Gif-sur-Yvette Cedex, France
| | - Pascal Gamas
- INRA, Laboratoire des Interactions Plantes-Microorganismes (LIPM), UMR441, Castanet-Tolosan 31326, France; CNRS, Laboratoire des Interactions Plantes-Microorganismes (LIPM), UMR2594, Castanet-Tolosan 31326, France
| | - Nicolas Rouhier
- Université de Lorraine, Interactions Arbres-Microorganismes, UMR1136, 54500 Vandoeuvre-lès-Nancy, France; INRA, Interactions Arbres-Microorganismes, UMR1136, 54280 Champenoux, France
| | - Françoise Montrichard
- IRHS, INRA, Université d'Angers, AGROCAMPUS-Ouest, SFR 4207 QUASAV, 42 Rue Georges Morel, 49071 Beaucouzé Cedex, France
| | - Pierre Frendo
- Institut Sophia Agrobiotech, Université de Nice-Sophia Antipolis, 400 Route des Chappes, BP167, 06903 Sophia Antipolis Cedex, France; Institut Sophia Agrobiotech, INRA UMR 1355, 400 Route des Chappes, BP167, 06903 Sophia Antipolis Cedex, France; Institut Sophia Agrobiotech, CNRS UMR 7254, 400 Route des Chappes, BP167, 06903 Sophia Antipolis Cedex, France.
| |
Collapse
|
15
|
Benincasa M, Barrière Q, Runti G, Pierre O, Bourge M, Scocchi M, Mergaert P. Single Cell Flow Cytometry Assay for Peptide Uptake by Bacteria. Bio Protoc 2016. [DOI: 10.21769/bioprotoc.2038] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022] Open
|
16
|
Crespo-Rivas JC, Guefrachi I, Mok KC, Villaécija-Aguilar JA, Acosta-Jurado S, Pierre O, Ruiz-Sainz JE, Taga ME, Mergaert P, Vinardell JM. Sinorhizobium fredii HH103 bacteroids are not terminally differentiated and show altered O-antigen in nodules of the Inverted Repeat-Lacking Clade legume Glycyrrhiza uralensis. Environ Microbiol 2015; 18:2392-404. [PMID: 26521863 DOI: 10.1111/1462-2920.13101] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2015] [Accepted: 10/20/2015] [Indexed: 11/28/2022]
Abstract
In rhizobial species that nodulate inverted repeat-lacking clade (IRLC) legumes, such as the interaction between Sinorhizobium meliloti and Medicago, bacteroid differentiation is driven by an endoreduplication event that is induced by host nodule-specific cysteine rich (NCR) antimicrobial peptides and requires the participation of the bacterial protein BacA. We have studied bacteroid differentiation of Sinorhizobium fredii HH103 in three host plants: Glycine max, Cajanus cajan and the IRLC legume Glycyrrhiza uralensis. Flow cytometry, microscopy analyses and viability studies of bacteroids as well as confocal microscopy studies carried out in nodules showed that S. fredii HH103 bacteroids, regardless of the host plant, had deoxyribonucleic acid (DNA) contents, cellular sizes and survival rates similar to those of free-living bacteria. Contrary to S. meliloti, S. fredii HH103 showed little or no sensitivity to Medicago NCR247 and NCR335 peptides. Inactivation of S. fredii HH103 bacA neither affected symbiosis with Glycyrrhiza nor increased bacterial sensitivity to Medicago NCRs. Finally, HH103 bacteroids isolated from Glycyrrhiza, but not those isolated from Cajanus or Glycine, showed an altered lipopolysaccharide. Our studies indicate that, in contrast to the S. meliloti-Medicago model symbiosis, bacteroids in the S. fredii HH103-Glycyrrhiza symbiosis do not undergo NCR-induced and bacA-dependent terminal differentiation.
Collapse
Affiliation(s)
- Juan C Crespo-Rivas
- Departamento de Microbiología, Facultad de Biología, Universidad de Sevilla, Avda. Reina Mercedes 6, CP, 41012, Sevilla, Spain
| | - Ibtissem Guefrachi
- Institute for Integrative Biology of the Cell, Centre National de la Recherche Scientifique, UMR 9198, 91198, Gif-sur-Yvette, France
| | - Kenny C Mok
- Department of Plant and Microbial Biology, University of California, Berkeley, CA, 94720, USA
| | - José A Villaécija-Aguilar
- Departamento de Microbiología, Facultad de Biología, Universidad de Sevilla, Avda. Reina Mercedes 6, CP, 41012, Sevilla, Spain.,Institute for Integrative Biology of the Cell, Centre National de la Recherche Scientifique, UMR 9198, 91198, Gif-sur-Yvette, France
| | - Sebastián Acosta-Jurado
- Departamento de Microbiología, Facultad de Biología, Universidad de Sevilla, Avda. Reina Mercedes 6, CP, 41012, Sevilla, Spain
| | - Olivier Pierre
- Institute for Integrative Biology of the Cell, Centre National de la Recherche Scientifique, UMR 9198, 91198, Gif-sur-Yvette, France
| | - José E Ruiz-Sainz
- Departamento de Microbiología, Facultad de Biología, Universidad de Sevilla, Avda. Reina Mercedes 6, CP, 41012, Sevilla, Spain
| | - Michiko E Taga
- Department of Plant and Microbial Biology, University of California, Berkeley, CA, 94720, USA
| | - Peter Mergaert
- Institute for Integrative Biology of the Cell, Centre National de la Recherche Scientifique, UMR 9198, 91198, Gif-sur-Yvette, France
| | - José M Vinardell
- Departamento de Microbiología, Facultad de Biología, Universidad de Sevilla, Avda. Reina Mercedes 6, CP, 41012, Sevilla, Spain
| |
Collapse
|
17
|
Guefrachi I, Pierre O, Timchenko T, Alunni B, Barrière Q, Czernic P, Villaécija-Aguilar JA, Verly C, Bourge M, Fardoux J, Mars M, Kondorosi E, Giraud E, Mergaert P. Bradyrhizobium BclA Is a Peptide Transporter Required for Bacterial Differentiation in Symbiosis with Aeschynomene Legumes. Mol Plant Microbe Interact 2015; 28:1155-66. [PMID: 26106901 DOI: 10.1094/mpmi-04-15-0094-r] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Nodules of legume plants are highly integrated symbiotic systems shaped by millions of years of evolution. They harbor nitrogen-fixing rhizobium bacteria called bacteroids. Several legume species produce peptides called nodule-specific cysteine-rich (NCR) peptides in the symbiotic nodule cells which house the bacteroids. NCR peptides are related to antimicrobial peptides of innate immunity. They induce the endosymbionts into a differentiated, enlarged, and polyploid state. The bacterial symbionts, on their side, evolved functions for the response to the NCR peptides. Here, we identified the bclA gene of Bradyrhizobium sp. strains ORS278 and ORS285, which is required for the formation of differentiated and functional bacteroids in the nodules of the NCR peptide-producing Aeschynomene legumes. The BclA ABC transporter promotes the import of NCR peptides and provides protection against the antimicrobial activity of these peptides. Moreover, BclA can complement the role of the related BacA transporter of Sinorhizobium meliloti, which has a similar symbiotic function in the interaction with Medicago legumes.
Collapse
Affiliation(s)
- Ibtissem Guefrachi
- 1 Institute for Integrative Biology of the Cell, UMR 9198, CNRS/Université Paris-Sud/CEA, Gif-sur-Yvette, France
- 2 Research Unit Biodiversity & Valorization of Arid Areas Bioressources (BVBAA), Faculty of Sciences, Gabès, Tunisia
| | - Olivier Pierre
- 1 Institute for Integrative Biology of the Cell, UMR 9198, CNRS/Université Paris-Sud/CEA, Gif-sur-Yvette, France
| | - Tatiana Timchenko
- 1 Institute for Integrative Biology of the Cell, UMR 9198, CNRS/Université Paris-Sud/CEA, Gif-sur-Yvette, France
| | - Benoît Alunni
- 1 Institute for Integrative Biology of the Cell, UMR 9198, CNRS/Université Paris-Sud/CEA, Gif-sur-Yvette, France
| | - Quentin Barrière
- 1 Institute for Integrative Biology of the Cell, UMR 9198, CNRS/Université Paris-Sud/CEA, Gif-sur-Yvette, France
| | - Pierre Czernic
- 3 Laboratoire des Symbioses Tropicales et Méditerranéennes, Institut pour la Recherche et le Développement, UMR IRD/SupAgro/INRA/UM2/CIRAD, Montpellier, France
| | | | - Camille Verly
- 1 Institute for Integrative Biology of the Cell, UMR 9198, CNRS/Université Paris-Sud/CEA, Gif-sur-Yvette, France
| | - Mickaël Bourge
- 1 Institute for Integrative Biology of the Cell, UMR 9198, CNRS/Université Paris-Sud/CEA, Gif-sur-Yvette, France
| | - Joël Fardoux
- 3 Laboratoire des Symbioses Tropicales et Méditerranéennes, Institut pour la Recherche et le Développement, UMR IRD/SupAgro/INRA/UM2/CIRAD, Montpellier, France
| | - Mohamed Mars
- 2 Research Unit Biodiversity & Valorization of Arid Areas Bioressources (BVBAA), Faculty of Sciences, Gabès, Tunisia
| | - Eva Kondorosi
- 1 Institute for Integrative Biology of the Cell, UMR 9198, CNRS/Université Paris-Sud/CEA, Gif-sur-Yvette, France
- 4 Institute of Biochemistry, Hungarian Academy of Sciences, Biological Research Centre, Szeged, Hungary
| | - Eric Giraud
- 3 Laboratoire des Symbioses Tropicales et Méditerranéennes, Institut pour la Recherche et le Développement, UMR IRD/SupAgro/INRA/UM2/CIRAD, Montpellier, France
| | - Peter Mergaert
- 1 Institute for Integrative Biology of the Cell, UMR 9198, CNRS/Université Paris-Sud/CEA, Gif-sur-Yvette, France
| |
Collapse
|
18
|
Czernic P, Gully D, Cartieaux F, Moulin L, Guefrachi I, Patrel D, Pierre O, Fardoux J, Chaintreuil C, Nguyen P, Gressent F, Da Silva C, Poulain J, Wincker P, Rofidal V, Hem S, Barrière Q, Arrighi JF, Mergaert P, Giraud E. Convergent Evolution of Endosymbiont Differentiation in Dalbergioid and Inverted Repeat-Lacking Clade Legumes Mediated by Nodule-Specific Cysteine-Rich Peptides. Plant Physiol 2015; 169:1254-65. [PMID: 26286718 PMCID: PMC4587450 DOI: 10.1104/pp.15.00584] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2015] [Accepted: 08/17/2015] [Indexed: 05/21/2023]
Abstract
Nutritional symbiotic interactions require the housing of large numbers of microbial symbionts, which produce essential compounds for the growth of the host. In the legume-rhizobium nitrogen-fixing symbiosis, thousands of rhizobium microsymbionts, called bacteroids, are confined intracellularly within highly specialized symbiotic host cells. In Inverted Repeat-Lacking Clade (IRLC) legumes such as Medicago spp., the bacteroids are kept under control by an arsenal of nodule-specific cysteine-rich (NCR) peptides, which induce the bacteria in an irreversible, strongly elongated, and polyploid state. Here, we show that in Aeschynomene spp. legumes belonging to the more ancient Dalbergioid lineage, bacteroids are elongated or spherical depending on the Aeschynomene spp. and that these bacteroids are terminally differentiated and polyploid, similar to bacteroids in IRLC legumes. Transcriptome, in situ hybridization, and proteome analyses demonstrated that the symbiotic cells in the Aeschynomene spp. nodules produce a large diversity of NCR-like peptides, which are transported to the bacteroids. Blocking NCR transport by RNA interference-mediated inactivation of the secretory pathway inhibits bacteroid differentiation. Together, our results support the view that bacteroid differentiation in the Dalbergioid clade, which likely evolved independently from the bacteroid differentiation in the IRLC clade, is based on very similar mechanisms used by IRLC legumes.
Collapse
Affiliation(s)
- Pierre Czernic
- Université de Montpellier, F-34095 Montpellier cedex 5, France (P.C.);Institut de Recherche pour le Développement, Laboratoire des Symbioses Tropicales et Méditerranéennes, Unité Mixte de Recherche Institut de Recherche pour le Développement/SupAgro/Institut National de la Recherche Agronomique/Université de Montpellier/Centre de Coopération Internationale en Recherche Agronomique pour le Développement, Campus International de Baillarguet, 34398 Montpellier cedex 5, France (D.G., F.C., L.M., D.P., J.F., C.C., P.N., F.G., J.-F.A., E.G.);Institute for Integrative Biology of the Cell, Unité Mixte de Recherche 9198, Centre National de la Recherche Scientifique/Université Paris-Sud/Commissariat à l'Energie Atomique, 91198 Gif-sur-Yvette, France (I.G., O.P., Q.B., P.M.);Commissariat à l'Energie Atomique, Direction des Sciences du Vivant, Institut de Génomique, Génoscope, 91000 Evry, France (C.D.S., J.P., P.W.); andLaboratoire de Protéomique Fonctionnelle, Institut National de la Recherche Agronomique, Unité de Recherche 1199, 34060 Montpellier, France (V.R., S.H.)
| | - Djamel Gully
- Université de Montpellier, F-34095 Montpellier cedex 5, France (P.C.);Institut de Recherche pour le Développement, Laboratoire des Symbioses Tropicales et Méditerranéennes, Unité Mixte de Recherche Institut de Recherche pour le Développement/SupAgro/Institut National de la Recherche Agronomique/Université de Montpellier/Centre de Coopération Internationale en Recherche Agronomique pour le Développement, Campus International de Baillarguet, 34398 Montpellier cedex 5, France (D.G., F.C., L.M., D.P., J.F., C.C., P.N., F.G., J.-F.A., E.G.);Institute for Integrative Biology of the Cell, Unité Mixte de Recherche 9198, Centre National de la Recherche Scientifique/Université Paris-Sud/Commissariat à l'Energie Atomique, 91198 Gif-sur-Yvette, France (I.G., O.P., Q.B., P.M.);Commissariat à l'Energie Atomique, Direction des Sciences du Vivant, Institut de Génomique, Génoscope, 91000 Evry, France (C.D.S., J.P., P.W.); andLaboratoire de Protéomique Fonctionnelle, Institut National de la Recherche Agronomique, Unité de Recherche 1199, 34060 Montpellier, France (V.R., S.H.)
| | - Fabienne Cartieaux
- Université de Montpellier, F-34095 Montpellier cedex 5, France (P.C.);Institut de Recherche pour le Développement, Laboratoire des Symbioses Tropicales et Méditerranéennes, Unité Mixte de Recherche Institut de Recherche pour le Développement/SupAgro/Institut National de la Recherche Agronomique/Université de Montpellier/Centre de Coopération Internationale en Recherche Agronomique pour le Développement, Campus International de Baillarguet, 34398 Montpellier cedex 5, France (D.G., F.C., L.M., D.P., J.F., C.C., P.N., F.G., J.-F.A., E.G.);Institute for Integrative Biology of the Cell, Unité Mixte de Recherche 9198, Centre National de la Recherche Scientifique/Université Paris-Sud/Commissariat à l'Energie Atomique, 91198 Gif-sur-Yvette, France (I.G., O.P., Q.B., P.M.);Commissariat à l'Energie Atomique, Direction des Sciences du Vivant, Institut de Génomique, Génoscope, 91000 Evry, France (C.D.S., J.P., P.W.); andLaboratoire de Protéomique Fonctionnelle, Institut National de la Recherche Agronomique, Unité de Recherche 1199, 34060 Montpellier, France (V.R., S.H.)
| | - Lionel Moulin
- Université de Montpellier, F-34095 Montpellier cedex 5, France (P.C.);Institut de Recherche pour le Développement, Laboratoire des Symbioses Tropicales et Méditerranéennes, Unité Mixte de Recherche Institut de Recherche pour le Développement/SupAgro/Institut National de la Recherche Agronomique/Université de Montpellier/Centre de Coopération Internationale en Recherche Agronomique pour le Développement, Campus International de Baillarguet, 34398 Montpellier cedex 5, France (D.G., F.C., L.M., D.P., J.F., C.C., P.N., F.G., J.-F.A., E.G.);Institute for Integrative Biology of the Cell, Unité Mixte de Recherche 9198, Centre National de la Recherche Scientifique/Université Paris-Sud/Commissariat à l'Energie Atomique, 91198 Gif-sur-Yvette, France (I.G., O.P., Q.B., P.M.);Commissariat à l'Energie Atomique, Direction des Sciences du Vivant, Institut de Génomique, Génoscope, 91000 Evry, France (C.D.S., J.P., P.W.); andLaboratoire de Protéomique Fonctionnelle, Institut National de la Recherche Agronomique, Unité de Recherche 1199, 34060 Montpellier, France (V.R., S.H.)
| | - Ibtissem Guefrachi
- Université de Montpellier, F-34095 Montpellier cedex 5, France (P.C.);Institut de Recherche pour le Développement, Laboratoire des Symbioses Tropicales et Méditerranéennes, Unité Mixte de Recherche Institut de Recherche pour le Développement/SupAgro/Institut National de la Recherche Agronomique/Université de Montpellier/Centre de Coopération Internationale en Recherche Agronomique pour le Développement, Campus International de Baillarguet, 34398 Montpellier cedex 5, France (D.G., F.C., L.M., D.P., J.F., C.C., P.N., F.G., J.-F.A., E.G.);Institute for Integrative Biology of the Cell, Unité Mixte de Recherche 9198, Centre National de la Recherche Scientifique/Université Paris-Sud/Commissariat à l'Energie Atomique, 91198 Gif-sur-Yvette, France (I.G., O.P., Q.B., P.M.);Commissariat à l'Energie Atomique, Direction des Sciences du Vivant, Institut de Génomique, Génoscope, 91000 Evry, France (C.D.S., J.P., P.W.); andLaboratoire de Protéomique Fonctionnelle, Institut National de la Recherche Agronomique, Unité de Recherche 1199, 34060 Montpellier, France (V.R., S.H.)
| | - Delphine Patrel
- Université de Montpellier, F-34095 Montpellier cedex 5, France (P.C.);Institut de Recherche pour le Développement, Laboratoire des Symbioses Tropicales et Méditerranéennes, Unité Mixte de Recherche Institut de Recherche pour le Développement/SupAgro/Institut National de la Recherche Agronomique/Université de Montpellier/Centre de Coopération Internationale en Recherche Agronomique pour le Développement, Campus International de Baillarguet, 34398 Montpellier cedex 5, France (D.G., F.C., L.M., D.P., J.F., C.C., P.N., F.G., J.-F.A., E.G.);Institute for Integrative Biology of the Cell, Unité Mixte de Recherche 9198, Centre National de la Recherche Scientifique/Université Paris-Sud/Commissariat à l'Energie Atomique, 91198 Gif-sur-Yvette, France (I.G., O.P., Q.B., P.M.);Commissariat à l'Energie Atomique, Direction des Sciences du Vivant, Institut de Génomique, Génoscope, 91000 Evry, France (C.D.S., J.P., P.W.); andLaboratoire de Protéomique Fonctionnelle, Institut National de la Recherche Agronomique, Unité de Recherche 1199, 34060 Montpellier, France (V.R., S.H.)
| | - Olivier Pierre
- Université de Montpellier, F-34095 Montpellier cedex 5, France (P.C.);Institut de Recherche pour le Développement, Laboratoire des Symbioses Tropicales et Méditerranéennes, Unité Mixte de Recherche Institut de Recherche pour le Développement/SupAgro/Institut National de la Recherche Agronomique/Université de Montpellier/Centre de Coopération Internationale en Recherche Agronomique pour le Développement, Campus International de Baillarguet, 34398 Montpellier cedex 5, France (D.G., F.C., L.M., D.P., J.F., C.C., P.N., F.G., J.-F.A., E.G.);Institute for Integrative Biology of the Cell, Unité Mixte de Recherche 9198, Centre National de la Recherche Scientifique/Université Paris-Sud/Commissariat à l'Energie Atomique, 91198 Gif-sur-Yvette, France (I.G., O.P., Q.B., P.M.);Commissariat à l'Energie Atomique, Direction des Sciences du Vivant, Institut de Génomique, Génoscope, 91000 Evry, France (C.D.S., J.P., P.W.); andLaboratoire de Protéomique Fonctionnelle, Institut National de la Recherche Agronomique, Unité de Recherche 1199, 34060 Montpellier, France (V.R., S.H.)
| | - Joël Fardoux
- Université de Montpellier, F-34095 Montpellier cedex 5, France (P.C.);Institut de Recherche pour le Développement, Laboratoire des Symbioses Tropicales et Méditerranéennes, Unité Mixte de Recherche Institut de Recherche pour le Développement/SupAgro/Institut National de la Recherche Agronomique/Université de Montpellier/Centre de Coopération Internationale en Recherche Agronomique pour le Développement, Campus International de Baillarguet, 34398 Montpellier cedex 5, France (D.G., F.C., L.M., D.P., J.F., C.C., P.N., F.G., J.-F.A., E.G.);Institute for Integrative Biology of the Cell, Unité Mixte de Recherche 9198, Centre National de la Recherche Scientifique/Université Paris-Sud/Commissariat à l'Energie Atomique, 91198 Gif-sur-Yvette, France (I.G., O.P., Q.B., P.M.);Commissariat à l'Energie Atomique, Direction des Sciences du Vivant, Institut de Génomique, Génoscope, 91000 Evry, France (C.D.S., J.P., P.W.); andLaboratoire de Protéomique Fonctionnelle, Institut National de la Recherche Agronomique, Unité de Recherche 1199, 34060 Montpellier, France (V.R., S.H.)
| | - Clémence Chaintreuil
- Université de Montpellier, F-34095 Montpellier cedex 5, France (P.C.);Institut de Recherche pour le Développement, Laboratoire des Symbioses Tropicales et Méditerranéennes, Unité Mixte de Recherche Institut de Recherche pour le Développement/SupAgro/Institut National de la Recherche Agronomique/Université de Montpellier/Centre de Coopération Internationale en Recherche Agronomique pour le Développement, Campus International de Baillarguet, 34398 Montpellier cedex 5, France (D.G., F.C., L.M., D.P., J.F., C.C., P.N., F.G., J.-F.A., E.G.);Institute for Integrative Biology of the Cell, Unité Mixte de Recherche 9198, Centre National de la Recherche Scientifique/Université Paris-Sud/Commissariat à l'Energie Atomique, 91198 Gif-sur-Yvette, France (I.G., O.P., Q.B., P.M.);Commissariat à l'Energie Atomique, Direction des Sciences du Vivant, Institut de Génomique, Génoscope, 91000 Evry, France (C.D.S., J.P., P.W.); andLaboratoire de Protéomique Fonctionnelle, Institut National de la Recherche Agronomique, Unité de Recherche 1199, 34060 Montpellier, France (V.R., S.H.)
| | - Phuong Nguyen
- Université de Montpellier, F-34095 Montpellier cedex 5, France (P.C.);Institut de Recherche pour le Développement, Laboratoire des Symbioses Tropicales et Méditerranéennes, Unité Mixte de Recherche Institut de Recherche pour le Développement/SupAgro/Institut National de la Recherche Agronomique/Université de Montpellier/Centre de Coopération Internationale en Recherche Agronomique pour le Développement, Campus International de Baillarguet, 34398 Montpellier cedex 5, France (D.G., F.C., L.M., D.P., J.F., C.C., P.N., F.G., J.-F.A., E.G.);Institute for Integrative Biology of the Cell, Unité Mixte de Recherche 9198, Centre National de la Recherche Scientifique/Université Paris-Sud/Commissariat à l'Energie Atomique, 91198 Gif-sur-Yvette, France (I.G., O.P., Q.B., P.M.);Commissariat à l'Energie Atomique, Direction des Sciences du Vivant, Institut de Génomique, Génoscope, 91000 Evry, France (C.D.S., J.P., P.W.); andLaboratoire de Protéomique Fonctionnelle, Institut National de la Recherche Agronomique, Unité de Recherche 1199, 34060 Montpellier, France (V.R., S.H.)
| | - Frédéric Gressent
- Université de Montpellier, F-34095 Montpellier cedex 5, France (P.C.);Institut de Recherche pour le Développement, Laboratoire des Symbioses Tropicales et Méditerranéennes, Unité Mixte de Recherche Institut de Recherche pour le Développement/SupAgro/Institut National de la Recherche Agronomique/Université de Montpellier/Centre de Coopération Internationale en Recherche Agronomique pour le Développement, Campus International de Baillarguet, 34398 Montpellier cedex 5, France (D.G., F.C., L.M., D.P., J.F., C.C., P.N., F.G., J.-F.A., E.G.);Institute for Integrative Biology of the Cell, Unité Mixte de Recherche 9198, Centre National de la Recherche Scientifique/Université Paris-Sud/Commissariat à l'Energie Atomique, 91198 Gif-sur-Yvette, France (I.G., O.P., Q.B., P.M.);Commissariat à l'Energie Atomique, Direction des Sciences du Vivant, Institut de Génomique, Génoscope, 91000 Evry, France (C.D.S., J.P., P.W.); andLaboratoire de Protéomique Fonctionnelle, Institut National de la Recherche Agronomique, Unité de Recherche 1199, 34060 Montpellier, France (V.R., S.H.)
| | - Corinne Da Silva
- Université de Montpellier, F-34095 Montpellier cedex 5, France (P.C.);Institut de Recherche pour le Développement, Laboratoire des Symbioses Tropicales et Méditerranéennes, Unité Mixte de Recherche Institut de Recherche pour le Développement/SupAgro/Institut National de la Recherche Agronomique/Université de Montpellier/Centre de Coopération Internationale en Recherche Agronomique pour le Développement, Campus International de Baillarguet, 34398 Montpellier cedex 5, France (D.G., F.C., L.M., D.P., J.F., C.C., P.N., F.G., J.-F.A., E.G.);Institute for Integrative Biology of the Cell, Unité Mixte de Recherche 9198, Centre National de la Recherche Scientifique/Université Paris-Sud/Commissariat à l'Energie Atomique, 91198 Gif-sur-Yvette, France (I.G., O.P., Q.B., P.M.);Commissariat à l'Energie Atomique, Direction des Sciences du Vivant, Institut de Génomique, Génoscope, 91000 Evry, France (C.D.S., J.P., P.W.); andLaboratoire de Protéomique Fonctionnelle, Institut National de la Recherche Agronomique, Unité de Recherche 1199, 34060 Montpellier, France (V.R., S.H.)
| | - Julie Poulain
- Université de Montpellier, F-34095 Montpellier cedex 5, France (P.C.);Institut de Recherche pour le Développement, Laboratoire des Symbioses Tropicales et Méditerranéennes, Unité Mixte de Recherche Institut de Recherche pour le Développement/SupAgro/Institut National de la Recherche Agronomique/Université de Montpellier/Centre de Coopération Internationale en Recherche Agronomique pour le Développement, Campus International de Baillarguet, 34398 Montpellier cedex 5, France (D.G., F.C., L.M., D.P., J.F., C.C., P.N., F.G., J.-F.A., E.G.);Institute for Integrative Biology of the Cell, Unité Mixte de Recherche 9198, Centre National de la Recherche Scientifique/Université Paris-Sud/Commissariat à l'Energie Atomique, 91198 Gif-sur-Yvette, France (I.G., O.P., Q.B., P.M.);Commissariat à l'Energie Atomique, Direction des Sciences du Vivant, Institut de Génomique, Génoscope, 91000 Evry, France (C.D.S., J.P., P.W.); andLaboratoire de Protéomique Fonctionnelle, Institut National de la Recherche Agronomique, Unité de Recherche 1199, 34060 Montpellier, France (V.R., S.H.)
| | - Patrick Wincker
- Université de Montpellier, F-34095 Montpellier cedex 5, France (P.C.);Institut de Recherche pour le Développement, Laboratoire des Symbioses Tropicales et Méditerranéennes, Unité Mixte de Recherche Institut de Recherche pour le Développement/SupAgro/Institut National de la Recherche Agronomique/Université de Montpellier/Centre de Coopération Internationale en Recherche Agronomique pour le Développement, Campus International de Baillarguet, 34398 Montpellier cedex 5, France (D.G., F.C., L.M., D.P., J.F., C.C., P.N., F.G., J.-F.A., E.G.);Institute for Integrative Biology of the Cell, Unité Mixte de Recherche 9198, Centre National de la Recherche Scientifique/Université Paris-Sud/Commissariat à l'Energie Atomique, 91198 Gif-sur-Yvette, France (I.G., O.P., Q.B., P.M.);Commissariat à l'Energie Atomique, Direction des Sciences du Vivant, Institut de Génomique, Génoscope, 91000 Evry, France (C.D.S., J.P., P.W.); andLaboratoire de Protéomique Fonctionnelle, Institut National de la Recherche Agronomique, Unité de Recherche 1199, 34060 Montpellier, France (V.R., S.H.)
| | - Valérie Rofidal
- Université de Montpellier, F-34095 Montpellier cedex 5, France (P.C.);Institut de Recherche pour le Développement, Laboratoire des Symbioses Tropicales et Méditerranéennes, Unité Mixte de Recherche Institut de Recherche pour le Développement/SupAgro/Institut National de la Recherche Agronomique/Université de Montpellier/Centre de Coopération Internationale en Recherche Agronomique pour le Développement, Campus International de Baillarguet, 34398 Montpellier cedex 5, France (D.G., F.C., L.M., D.P., J.F., C.C., P.N., F.G., J.-F.A., E.G.);Institute for Integrative Biology of the Cell, Unité Mixte de Recherche 9198, Centre National de la Recherche Scientifique/Université Paris-Sud/Commissariat à l'Energie Atomique, 91198 Gif-sur-Yvette, France (I.G., O.P., Q.B., P.M.);Commissariat à l'Energie Atomique, Direction des Sciences du Vivant, Institut de Génomique, Génoscope, 91000 Evry, France (C.D.S., J.P., P.W.); andLaboratoire de Protéomique Fonctionnelle, Institut National de la Recherche Agronomique, Unité de Recherche 1199, 34060 Montpellier, France (V.R., S.H.)
| | - Sonia Hem
- Université de Montpellier, F-34095 Montpellier cedex 5, France (P.C.);Institut de Recherche pour le Développement, Laboratoire des Symbioses Tropicales et Méditerranéennes, Unité Mixte de Recherche Institut de Recherche pour le Développement/SupAgro/Institut National de la Recherche Agronomique/Université de Montpellier/Centre de Coopération Internationale en Recherche Agronomique pour le Développement, Campus International de Baillarguet, 34398 Montpellier cedex 5, France (D.G., F.C., L.M., D.P., J.F., C.C., P.N., F.G., J.-F.A., E.G.);Institute for Integrative Biology of the Cell, Unité Mixte de Recherche 9198, Centre National de la Recherche Scientifique/Université Paris-Sud/Commissariat à l'Energie Atomique, 91198 Gif-sur-Yvette, France (I.G., O.P., Q.B., P.M.);Commissariat à l'Energie Atomique, Direction des Sciences du Vivant, Institut de Génomique, Génoscope, 91000 Evry, France (C.D.S., J.P., P.W.); andLaboratoire de Protéomique Fonctionnelle, Institut National de la Recherche Agronomique, Unité de Recherche 1199, 34060 Montpellier, France (V.R., S.H.)
| | - Quentin Barrière
- Université de Montpellier, F-34095 Montpellier cedex 5, France (P.C.);Institut de Recherche pour le Développement, Laboratoire des Symbioses Tropicales et Méditerranéennes, Unité Mixte de Recherche Institut de Recherche pour le Développement/SupAgro/Institut National de la Recherche Agronomique/Université de Montpellier/Centre de Coopération Internationale en Recherche Agronomique pour le Développement, Campus International de Baillarguet, 34398 Montpellier cedex 5, France (D.G., F.C., L.M., D.P., J.F., C.C., P.N., F.G., J.-F.A., E.G.);Institute for Integrative Biology of the Cell, Unité Mixte de Recherche 9198, Centre National de la Recherche Scientifique/Université Paris-Sud/Commissariat à l'Energie Atomique, 91198 Gif-sur-Yvette, France (I.G., O.P., Q.B., P.M.);Commissariat à l'Energie Atomique, Direction des Sciences du Vivant, Institut de Génomique, Génoscope, 91000 Evry, France (C.D.S., J.P., P.W.); andLaboratoire de Protéomique Fonctionnelle, Institut National de la Recherche Agronomique, Unité de Recherche 1199, 34060 Montpellier, France (V.R., S.H.)
| | - Jean-François Arrighi
- Université de Montpellier, F-34095 Montpellier cedex 5, France (P.C.);Institut de Recherche pour le Développement, Laboratoire des Symbioses Tropicales et Méditerranéennes, Unité Mixte de Recherche Institut de Recherche pour le Développement/SupAgro/Institut National de la Recherche Agronomique/Université de Montpellier/Centre de Coopération Internationale en Recherche Agronomique pour le Développement, Campus International de Baillarguet, 34398 Montpellier cedex 5, France (D.G., F.C., L.M., D.P., J.F., C.C., P.N., F.G., J.-F.A., E.G.);Institute for Integrative Biology of the Cell, Unité Mixte de Recherche 9198, Centre National de la Recherche Scientifique/Université Paris-Sud/Commissariat à l'Energie Atomique, 91198 Gif-sur-Yvette, France (I.G., O.P., Q.B., P.M.);Commissariat à l'Energie Atomique, Direction des Sciences du Vivant, Institut de Génomique, Génoscope, 91000 Evry, France (C.D.S., J.P., P.W.); andLaboratoire de Protéomique Fonctionnelle, Institut National de la Recherche Agronomique, Unité de Recherche 1199, 34060 Montpellier, France (V.R., S.H.)
| | - Peter Mergaert
- Université de Montpellier, F-34095 Montpellier cedex 5, France (P.C.);Institut de Recherche pour le Développement, Laboratoire des Symbioses Tropicales et Méditerranéennes, Unité Mixte de Recherche Institut de Recherche pour le Développement/SupAgro/Institut National de la Recherche Agronomique/Université de Montpellier/Centre de Coopération Internationale en Recherche Agronomique pour le Développement, Campus International de Baillarguet, 34398 Montpellier cedex 5, France (D.G., F.C., L.M., D.P., J.F., C.C., P.N., F.G., J.-F.A., E.G.);Institute for Integrative Biology of the Cell, Unité Mixte de Recherche 9198, Centre National de la Recherche Scientifique/Université Paris-Sud/Commissariat à l'Energie Atomique, 91198 Gif-sur-Yvette, France (I.G., O.P., Q.B., P.M.);Commissariat à l'Energie Atomique, Direction des Sciences du Vivant, Institut de Génomique, Génoscope, 91000 Evry, France (C.D.S., J.P., P.W.); andLaboratoire de Protéomique Fonctionnelle, Institut National de la Recherche Agronomique, Unité de Recherche 1199, 34060 Montpellier, France (V.R., S.H.)
| | - Eric Giraud
- Université de Montpellier, F-34095 Montpellier cedex 5, France (P.C.);Institut de Recherche pour le Développement, Laboratoire des Symbioses Tropicales et Méditerranéennes, Unité Mixte de Recherche Institut de Recherche pour le Développement/SupAgro/Institut National de la Recherche Agronomique/Université de Montpellier/Centre de Coopération Internationale en Recherche Agronomique pour le Développement, Campus International de Baillarguet, 34398 Montpellier cedex 5, France (D.G., F.C., L.M., D.P., J.F., C.C., P.N., F.G., J.-F.A., E.G.);Institute for Integrative Biology of the Cell, Unité Mixte de Recherche 9198, Centre National de la Recherche Scientifique/Université Paris-Sud/Commissariat à l'Energie Atomique, 91198 Gif-sur-Yvette, France (I.G., O.P., Q.B., P.M.);Commissariat à l'Energie Atomique, Direction des Sciences du Vivant, Institut de Génomique, Génoscope, 91000 Evry, France (C.D.S., J.P., P.W.); andLaboratoire de Protéomique Fonctionnelle, Institut National de la Recherche Agronomique, Unité de Recherche 1199, 34060 Montpellier, France (V.R., S.H.)
| |
Collapse
|
19
|
Baldacci-Cresp F, Maucourt M, Deborde C, Pierre O, Moing A, Brouquisse R, Favery B, Frendo P. Maturation of nematode-induced galls in Medicago truncatula is related to water status and primary metabolism modifications. Plant Sci 2015; 232:77-85. [PMID: 25617326 DOI: 10.1016/j.plantsci.2014.12.019] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2014] [Revised: 12/22/2014] [Accepted: 12/23/2014] [Indexed: 06/04/2023]
Abstract
Root-knot nematodes are obligatory plant parasitic worms that establish and maintain an intimate relationship with their host plants. During a compatible interaction, these nematodes induce the redifferentiation of root cells into multinucleate and hypertrophied giant cells (GCs). These metabolically active feeding cells constitute the exclusive source of nutrients for the nematode. We analyzed the modifications of water status, ionic content and accumulation of metabolites in development and mature galls induced by Meloidogyne incognita and in uninfected roots of Medicago truncatula plants. Water potential and osmotic pressure are significantly modified in mature galls compared to developing galls and control roots. Ionic content is significantly modified in galls compared to roots. Principal component analyses of metabolite content showed that mature gall metabolism is significantly modified compared to developing gall metabolism. The most striking differences were the three-fold increase of trehalose content associated to the five-fold diminution in glucose concentration in mature galls. Gene expression analysis showed that trehalose accumulation was, at least, partially linked to a significantly lower expression of the trehalase gene in mature galls. Our results point to significant modifications of gall physiology during maturation.
Collapse
Affiliation(s)
- Fabien Baldacci-Cresp
- Université de Nice Sophia-Antipolis, UMR Institut Sophia Agrobiotech, 400 route des chappes BP167, F-06903 Sophia Antipolis, France; INRA UMR 7254 Institut Sophia Agrobiotech, 400 route des chappes BP167, F-06903 Sophia Antipolis, France; CNRS UMR1355 Institut Sophia Agrobiotech, 400 route des chappes BP167, F-06903 Sophia Antipolis, France.
| | - Mickaël Maucourt
- Université de Bordeaux 2, UMR 1332 Biologie du Fruit et Pathologie, Centre INRA de Bordeaux, F-33140 Villenave d'Ornon, France; Metabolome Facility of Bordeaux Functional Genomics Center, IBVM, Centre INRA de Bordeaux, F-33140 Villenave d'Ornon, France
| | - Catherine Deborde
- Metabolome Facility of Bordeaux Functional Genomics Center, IBVM, Centre INRA de Bordeaux, F-33140 Villenave d'Ornon, France; INRA, UMR 1332 Biologie du Fruit et Pathologie, Centre INRA de Bordeaux, F-33140 Villenave d'Ornon, France
| | - Olivier Pierre
- Université de Nice Sophia-Antipolis, UMR Institut Sophia Agrobiotech, 400 route des chappes BP167, F-06903 Sophia Antipolis, France; INRA UMR 7254 Institut Sophia Agrobiotech, 400 route des chappes BP167, F-06903 Sophia Antipolis, France; CNRS UMR1355 Institut Sophia Agrobiotech, 400 route des chappes BP167, F-06903 Sophia Antipolis, France
| | - Annick Moing
- Metabolome Facility of Bordeaux Functional Genomics Center, IBVM, Centre INRA de Bordeaux, F-33140 Villenave d'Ornon, France; INRA, UMR 1332 Biologie du Fruit et Pathologie, Centre INRA de Bordeaux, F-33140 Villenave d'Ornon, France
| | - Renaud Brouquisse
- Université de Nice Sophia-Antipolis, UMR Institut Sophia Agrobiotech, 400 route des chappes BP167, F-06903 Sophia Antipolis, France; INRA UMR 7254 Institut Sophia Agrobiotech, 400 route des chappes BP167, F-06903 Sophia Antipolis, France; CNRS UMR1355 Institut Sophia Agrobiotech, 400 route des chappes BP167, F-06903 Sophia Antipolis, France
| | - Bruno Favery
- Université de Nice Sophia-Antipolis, UMR Institut Sophia Agrobiotech, 400 route des chappes BP167, F-06903 Sophia Antipolis, France; INRA UMR 7254 Institut Sophia Agrobiotech, 400 route des chappes BP167, F-06903 Sophia Antipolis, France; CNRS UMR1355 Institut Sophia Agrobiotech, 400 route des chappes BP167, F-06903 Sophia Antipolis, France
| | - Pierre Frendo
- Université de Nice Sophia-Antipolis, UMR Institut Sophia Agrobiotech, 400 route des chappes BP167, F-06903 Sophia Antipolis, France; INRA UMR 7254 Institut Sophia Agrobiotech, 400 route des chappes BP167, F-06903 Sophia Antipolis, France; CNRS UMR1355 Institut Sophia Agrobiotech, 400 route des chappes BP167, F-06903 Sophia Antipolis, France
| |
Collapse
|
20
|
Pierre O, Hopkins J, Combier M, Baldacci F, Engler G, Brouquisse R, Hérouart D, Boncompagni E. Involvement of papain and legumain proteinase in the senescence process of Medicago truncatula nodules. New Phytol 2014; 202:849-863. [PMID: 24527680 DOI: 10.1111/nph.12717] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2013] [Accepted: 12/27/2013] [Indexed: 06/03/2023]
Abstract
The symbiotic interaction between legumes and Rhizobiaceae leads to the formation of new root organs called nodules. Within the nodule, Rhizobiaceae differentiate into nitrogen-fixing bacteroids. However, this symbiotic interaction is time-limited as a result of the initiation of a senescence process, leading to a complete degradation of bacteroids and host plant cells. The increase in proteolytic activity is one of the key features of this process. In this study, we analysed the involvement of two different classes of cysteine proteinases, MtCP6 and MtVPE, in the senescence process of Medicago truncatula nodules. Spatiotemporal expression of MtCP6 and MtVPE was investigated using promoter- β-glucuronidase fusions. Corresponding gene inductions were observed during both developmental and stress-induced nodule senescence. Both MtCP6 and MtVPE proteolytic activities were increased during stress-induced senescence. Down-regulation of both proteinases mediated by RNAi in the senescence zone delayed nodule senescence and increased nitrogen fixation, while their early expression promoted nodule senescence. Using green fluorescent protein fusions, in vivo confocal imaging showed that both proteinases accumulated in the vacuole of uninfected cells or the symbiosomes of infected cells. These data enlighten the crucial role of MtCP6 and MtVPE in the onset of nodule senescence.
Collapse
Affiliation(s)
- Olivier Pierre
- UMR INRA 1355, Institut Sophia Agrobiotech (ISA), 400 route des Chappes, BP167, F-06903, Sophia-Antipolis Cedex, France
- CNRS 7254, Institut Sophia Agrobiotech (ISA), 400 route des Chappes, BP167, F-06903, Sophia-Antipolis Cedex, France
- Institut Sophia Agrobiotech (ISA), Université de Nice-Sophia Antipolis, 400 route des Chappes, BP167, F-06903, Sophia-Antipolis Cedex, France
| | - Julie Hopkins
- UMR INRA 1355, Institut Sophia Agrobiotech (ISA), 400 route des Chappes, BP167, F-06903, Sophia-Antipolis Cedex, France
- CNRS 7254, Institut Sophia Agrobiotech (ISA), 400 route des Chappes, BP167, F-06903, Sophia-Antipolis Cedex, France
- Institut Sophia Agrobiotech (ISA), Université de Nice-Sophia Antipolis, 400 route des Chappes, BP167, F-06903, Sophia-Antipolis Cedex, France
| | - Maud Combier
- UMR INRA 1355, Institut Sophia Agrobiotech (ISA), 400 route des Chappes, BP167, F-06903, Sophia-Antipolis Cedex, France
- CNRS 7254, Institut Sophia Agrobiotech (ISA), 400 route des Chappes, BP167, F-06903, Sophia-Antipolis Cedex, France
- Institut Sophia Agrobiotech (ISA), Université de Nice-Sophia Antipolis, 400 route des Chappes, BP167, F-06903, Sophia-Antipolis Cedex, France
| | - Fabien Baldacci
- UMR INRA 1355, Institut Sophia Agrobiotech (ISA), 400 route des Chappes, BP167, F-06903, Sophia-Antipolis Cedex, France
- CNRS 7254, Institut Sophia Agrobiotech (ISA), 400 route des Chappes, BP167, F-06903, Sophia-Antipolis Cedex, France
- Institut Sophia Agrobiotech (ISA), Université de Nice-Sophia Antipolis, 400 route des Chappes, BP167, F-06903, Sophia-Antipolis Cedex, France
| | - Gilbert Engler
- UMR INRA 1355, Institut Sophia Agrobiotech (ISA), 400 route des Chappes, BP167, F-06903, Sophia-Antipolis Cedex, France
- CNRS 7254, Institut Sophia Agrobiotech (ISA), 400 route des Chappes, BP167, F-06903, Sophia-Antipolis Cedex, France
- Institut Sophia Agrobiotech (ISA), Université de Nice-Sophia Antipolis, 400 route des Chappes, BP167, F-06903, Sophia-Antipolis Cedex, France
| | - Renaud Brouquisse
- UMR INRA 1355, Institut Sophia Agrobiotech (ISA), 400 route des Chappes, BP167, F-06903, Sophia-Antipolis Cedex, France
- CNRS 7254, Institut Sophia Agrobiotech (ISA), 400 route des Chappes, BP167, F-06903, Sophia-Antipolis Cedex, France
- Institut Sophia Agrobiotech (ISA), Université de Nice-Sophia Antipolis, 400 route des Chappes, BP167, F-06903, Sophia-Antipolis Cedex, France
| | - Didier Hérouart
- UMR INRA 1355, Institut Sophia Agrobiotech (ISA), 400 route des Chappes, BP167, F-06903, Sophia-Antipolis Cedex, France
- CNRS 7254, Institut Sophia Agrobiotech (ISA), 400 route des Chappes, BP167, F-06903, Sophia-Antipolis Cedex, France
- Institut Sophia Agrobiotech (ISA), Université de Nice-Sophia Antipolis, 400 route des Chappes, BP167, F-06903, Sophia-Antipolis Cedex, France
| | - Eric Boncompagni
- UMR INRA 1355, Institut Sophia Agrobiotech (ISA), 400 route des Chappes, BP167, F-06903, Sophia-Antipolis Cedex, France
- CNRS 7254, Institut Sophia Agrobiotech (ISA), 400 route des Chappes, BP167, F-06903, Sophia-Antipolis Cedex, France
- Institut Sophia Agrobiotech (ISA), Université de Nice-Sophia Antipolis, 400 route des Chappes, BP167, F-06903, Sophia-Antipolis Cedex, France
| |
Collapse
|
21
|
Hopkins J, Pierre O, Kazmierczak T, Gruber V, Frugier F, Clement M, Frendo P, Herouart D, Boncompagni E. MtZR1, a PRAF protein, is involved in the development of roots and symbiotic root nodules in Medicago truncatula. Plant Cell Environ 2014; 37:658-69. [PMID: 23961805 DOI: 10.1111/pce.12185] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2013] [Revised: 08/01/2013] [Accepted: 08/05/2013] [Indexed: 06/02/2023]
Abstract
PRAF proteins are present in all plants, but their functions remain unclear. We investigated the role of one member of the PRAF family, MtZR1, on the development of roots and nitrogen-fixing nodules in Medicago truncatula. We found that MtZR1 was expressed in all M. truncatula organs. Spatiotemporal analysis showed that MtZR1 expression in M. truncatula roots was mostly limited to the root meristem and the vascular bundles of mature nodules. MtZR1 expression in root nodules was down-regulated in response to various abiotic stresses known to affect nitrogen fixation efficiency. The down-regulation of MtZR1 expression by RNA interference in transgenic roots decreased root growth and impaired nodule development and function. MtZR1 overexpression resulted in longer roots and significant changes to nodule development. Our data thus indicate that MtZR1 is involved in the development of roots and nodules. To our knowledge, this work provides the first in vivo experimental evidence of a biological role for a typical PRAF protein in plants.
Collapse
Affiliation(s)
- Julie Hopkins
- INRA 1355, UMR 'Institut Sophia Agrobiotech', Sophia-Antipolis Cedex, F-06903, France; CNRS 7254, UMR 'Institut Sophia Agrobiotech', Sophia-Antipolis Cedex, F-06903, France; UMR 'Institut Sophia Agrobiotech' Université de Nice-Sophia Antipolis (UNS), Cedex, F-06903, France
| | | | | | | | | | | | | | | | | |
Collapse
|
22
|
Pierre O, Engler G, Hopkins J, Brau F, Boncompagni E, Hérouart D. Peribacteroid space acidification: a marker of mature bacteroid functioning in Medicago truncatula nodules. Plant Cell Environ 2013; 36:2059-2070. [PMID: 23586685 DOI: 10.1111/pce.12116] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2012] [Revised: 03/27/2013] [Accepted: 04/02/2013] [Indexed: 06/02/2023]
Abstract
Legumes form a symbiotic interaction with Rhizobiaceae bacteria, which differentiate into nitrogen-fixing bacteroids within nodules. Here, we investigated in vivo the pH of the peribacteroid space (PBS) surrounding the bacteroid and pH variation throughout symbiosis. In vivo confocal microscopy investigations, using acidotropic probes, demonstrated the acidic state of the PBS. In planta analysis of nodule senescence induced by distinct biological processes drastically increased PBS pH in the N2 -fixing zone (zone III). Therefore, the PBS acidification observed in mature bacteroids can be considered as a marker of bacteroid N2 fixation. Using a pH-sensitive ratiometric probe, PBS pH was measured in vivo during the whole symbiotic process. We showed a progressive acidification of the PBS from the bacteroid release up to the onset of N2 fixation. Genetic and pharmacological approaches were conducted and led to disruption of the PBS acidification. Altogether, our findings shed light on the role of PBS pH of mature bacteroids in nodule functioning, providing new tools to monitor in vivo bacteroid physiology.
Collapse
Affiliation(s)
- Olivier Pierre
- UMR INRA 1355-CNRS 7254-Université de Nice Sophia-Antipolis, Institut Sophia Agrobiotech, 400 route des Chappes, F-06903, Sophia Antipolis, France
| | | | | | | | | | | |
Collapse
|
23
|
Cam Y, Pierre O, Boncompagni E, Hérouart D, Meilhoc E, Bruand C. Nitric oxide (NO): a key player in the senescence of Medicago truncatula root nodules. New Phytol 2012; 196:548-560. [PMID: 22937888 DOI: 10.1111/j.1469-8137.2012.04282.x] [Citation(s) in RCA: 76] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2012] [Accepted: 07/15/2012] [Indexed: 05/23/2023]
Abstract
Nitric oxide (NO) is a signalling and defence molecule involved in diverse plant developmental processes, as well as in the plant response to pathogens. NO has also been detected at different steps of the symbiosis between legumes and rhizobia. NO is required for an optimal establishment of the Medicago truncatula-Sinorhizobium meliloti symbiotic interaction, but little is known about the role of NO in mature nodules. Here, we investigate the role of NO in the late steps of symbiosis. Genetic and pharmacological approaches were conducted to modulate the NO level inside root nodules, and their effects on nitrogen fixation and root nodule senescence were monitored. An increase in endogenous NO levels led to a decrease in nitrogen fixation and early nodule senescence, characterized by cytological modifications of the nodule structure and the early expression of a specific senescence marker. By contrast, a decrease in NO levels led to a delay in nodule senescence. Together, our results strongly suggest that NO is a signal in developmental as well as stress-induced nodule senescence. In addition, this work demonstrates the pivotal role of the bacterial NO detoxification response in the prevention of early nodule senescence, and hence the maintenance of efficient symbiosis.
Collapse
Affiliation(s)
- Yvan Cam
- Laboratoire des Interactions Plantes-Microorganismes (LIPM), INRA, UMR441, 24 Chemin de Borde Rouge - Auzeville, CS 52627, F-31326, Castanet-Tolosan Cedex, France
- Laboratoire des Interactions Plantes-Microorganismes (LIPM), CNRS, UMR2594, 24 Chemin de Borde Rouge - Auzeville, CS 52627, F-31326, Castanet-Tolosan Cedex, France
| | - Olivier Pierre
- 'Institut Sophia Agrobiotech', UMR ISA, INRA 1355-CNRS 7254-Université de Nice-Sophia Antipolis (UNS), 400 route des Chappes BP 167, F-06903, Sophia-Antipolis Cedex, France
| | - Eric Boncompagni
- 'Institut Sophia Agrobiotech', UMR ISA, INRA 1355-CNRS 7254-Université de Nice-Sophia Antipolis (UNS), 400 route des Chappes BP 167, F-06903, Sophia-Antipolis Cedex, France
| | - Didier Hérouart
- 'Institut Sophia Agrobiotech', UMR ISA, INRA 1355-CNRS 7254-Université de Nice-Sophia Antipolis (UNS), 400 route des Chappes BP 167, F-06903, Sophia-Antipolis Cedex, France
| | - Eliane Meilhoc
- Laboratoire des Interactions Plantes-Microorganismes (LIPM), INRA, UMR441, 24 Chemin de Borde Rouge - Auzeville, CS 52627, F-31326, Castanet-Tolosan Cedex, France
- Laboratoire des Interactions Plantes-Microorganismes (LIPM), CNRS, UMR2594, 24 Chemin de Borde Rouge - Auzeville, CS 52627, F-31326, Castanet-Tolosan Cedex, France
| | - Claude Bruand
- Laboratoire des Interactions Plantes-Microorganismes (LIPM), INRA, UMR441, 24 Chemin de Borde Rouge - Auzeville, CS 52627, F-31326, Castanet-Tolosan Cedex, France
- Laboratoire des Interactions Plantes-Microorganismes (LIPM), CNRS, UMR2594, 24 Chemin de Borde Rouge - Auzeville, CS 52627, F-31326, Castanet-Tolosan Cedex, France
| |
Collapse
|
24
|
Haag AF, Baloban M, Sani M, Kerscher B, Pierre O, Farkas A, Longhi R, Boncompagni E, Hérouart D, Dall’Angelo S, Kondorosi E, Zanda M, Mergaert P, Ferguson GP. Protection of Sinorhizobium against host cysteine-rich antimicrobial peptides is critical for symbiosis. PLoS Biol 2011; 9:e1001169. [PMID: 21990963 PMCID: PMC3186793 DOI: 10.1371/journal.pbio.1001169] [Citation(s) in RCA: 136] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2011] [Accepted: 08/22/2011] [Indexed: 01/01/2023] Open
Abstract
A bacterial membrane protein, BacA, protects Sinorhizobium meliloti against the antimicrobial activity of host peptides, enabling the peptides to induce bacterial persistence rather than bacterial death. Sinorhizobium meliloti differentiates into persisting, nitrogen-fixing bacteroids within root nodules of the legume Medicago truncatula. Nodule-specific cysteine-rich antimicrobial peptides (NCR AMPs) and the bacterial BacA protein are essential for bacteroid development. However, the bacterial factors central to the NCR AMP response and the in planta role of BacA are unknown. We investigated the hypothesis that BacA is critical for the bacterial response towards NCR AMPs. We found that BacA was not essential for NCR AMPs to induce features of S. meliloti bacteroids in vitro. Instead, BacA was critical to reduce the amount of NCR AMP-induced membrane permeabilization and bacterial killing in vitro. Within M. truncatula, both wild-type and BacA-deficient mutant bacteria were challenged with NCR AMPs, but this resulted in persistence of the wild-type bacteria and rapid cell death of the mutant bacteria. In contrast, BacA was dispensable for bacterial survival in an M. truncatula dnf1 mutant defective in NCR AMP transport to the bacterial compartment. Therefore, BacA is critical for the legume symbiosis by protecting S. meliloti against the bactericidal effects of NCR AMPs. Host AMPs are ubiquitous in nature and BacA proteins are essential for other chronic host infections by symbiotic and pathogenic bacteria. Hence, our findings suggest that BacA-mediated protection of bacteria against host AMPs is a critical stage in the establishment of different prolonged host infections. Certain bacterial species have the unique capacity to enter into eukaryotic host cells and establish prolonged infections, which can be beneficial (e.g. bacterial-legume symbiosis) or detrimental (e.g. chronic disease) for the host. However, the mechanisms by which bacteria persist in host cells are poorly understood. Legume peptides and the bacterial BacA membrane protein play essential roles in enabling bacteria to establish prolonged legume infections. However, the biological function of BacA in persistent legume infections has eluded scientists for nearly two decades. In this article, we investigated a potential relationship between legume peptides and BacA in the establishment of prolonged bacterial-legume infections. We found that BacA was critical to protect bacteria against the antimicrobial action of legume peptides, thereby allowing the peptides to induce bacterial persistence within the legume rather than rapid bacterial death. Mammalian hosts also produce peptides in response to invading microorganisms and BacA proteins are critical for medically important bacterial pathogens such as Mycobacterium tuberculosis to form prolonged mammalian infections. Therefore, our results suggest that BacA-mediated protection against host peptides might be a conserved mechanism used by both symbiotic and pathogenic bacterial species to establish long-term host infections.
Collapse
Affiliation(s)
- Andreas F. Haag
- School of Medicine & Dentistry, Institute of Medical Sciences, University of Aberdeen, Aberdeen, United Kingdom
| | - Mikhail Baloban
- Institut des Sciences du Végétal, Centre National de la Recherche Scientifique, Gif-sur-Yvette, France
| | - Monica Sani
- Consiglio Nazionale delle Ricerche–Istituto di Chimica del Riconoscimento Molecolare C.N.R.-I.C.R.M., Milano, Italy
- KemoTech s.r.l., Pula, Italy
| | - Bernhard Kerscher
- School of Medicine & Dentistry, Institute of Medical Sciences, University of Aberdeen, Aberdeen, United Kingdom
| | - Olivier Pierre
- Interactions Biotiques et Santé Végétale, Institut National de la Recherche Agronomique, Centre National de la Recherche Scientifique, Université de Nice–Sophia Antipolis, Sophia-Antipolis, France
| | - Attila Farkas
- Institute for Plant Genomics, Human Biotechnology and Bioenergy, Bay Zoltan Foundation for Applied Research, Szeged, Hungary
| | - Renato Longhi
- Consiglio Nazionale delle Ricerche–Istituto di Chimica del Riconoscimento Molecolare C.N.R.-I.C.R.M., Milano, Italy
| | - Eric Boncompagni
- Interactions Biotiques et Santé Végétale, Institut National de la Recherche Agronomique, Centre National de la Recherche Scientifique, Université de Nice–Sophia Antipolis, Sophia-Antipolis, France
| | - Didier Hérouart
- Interactions Biotiques et Santé Végétale, Institut National de la Recherche Agronomique, Centre National de la Recherche Scientifique, Université de Nice–Sophia Antipolis, Sophia-Antipolis, France
| | - Sergio Dall’Angelo
- School of Medical Sciences, Institute of Medical Sciences, University of Aberdeen, Aberdeen, United Kingdom
| | - Eva Kondorosi
- Institut des Sciences du Végétal, Centre National de la Recherche Scientifique, Gif-sur-Yvette, France
- Biological Research Centre, Hungarian Academy of Sciences, Szeged, Hungary
| | - Matteo Zanda
- Consiglio Nazionale delle Ricerche–Istituto di Chimica del Riconoscimento Molecolare C.N.R.-I.C.R.M., Milano, Italy
- School of Medical Sciences, Institute of Medical Sciences, University of Aberdeen, Aberdeen, United Kingdom
| | - Peter Mergaert
- Institut des Sciences du Végétal, Centre National de la Recherche Scientifique, Gif-sur-Yvette, France
- * E-mail: (PM); (GPF)
| | - Gail P. Ferguson
- School of Medicine & Dentistry, Institute of Medical Sciences, University of Aberdeen, Aberdeen, United Kingdom
- * E-mail: (PM); (GPF)
| |
Collapse
|
25
|
de Valk H, Vaillant V, Jacquet C, Rocourt J, Le Querrec F, Stainer F, Quelquejeu N, Pierre O, Pierre V, Desenclos JC, Goulet V. Two consecutive nationwide outbreaks of Listeriosis in France, October 1999-February 2000. Am J Epidemiol 2001; 154:944-50. [PMID: 11700249 DOI: 10.1093/aje/154.10.944] [Citation(s) in RCA: 96] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
In France, listeriosis surveillance is based on mandatory notification of all culture-confirmed cases, with systematic typing of isolates and routine collection of the patient's food history. From October 1999 to March 2000, two outbreaks of listeriosis were detected through this enhanced surveillance system. In outbreak 1, analysis of the food histories of cases suggested brand X "rillettes," a pâté-like meat product, as the vehicle of infection, and the outbreak strain of Listeria monocytogenes was subsequently isolated from the incriminated rillettes. In outbreak 2, a case-control study showed that consumption of jellied pork tongue was strongly associated with infection with the outbreak strain (odds ratio = 75.5, 95% confidence interval: 4.7, 1,216.0). However, trace-back results did not permit incrimination of any particular manufacturer of jellied pork tongue, and the outbreak strain was not isolated from the incriminated food or from any production sites. Consumption of jellied pork tongue was discouraged on epidemiologic evidence alone. The consecutive occurrence of these two outbreaks confirms the epidemic potential of listeriosis, even in a context of decreasing incidence, and underlines the importance of timely case-reporting and systematic typing of human L. monocytogenes strains to allow early detection and separate investigation of different clusters.
Collapse
Affiliation(s)
- H de Valk
- Institut de Veille Sanitaire, St. Maurice, France.
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
26
|
Goulet V, de Valk H, Pierre O, Stainer F, Rocourt J, Vaillant V, Jacquet C, Desenclos JC. Effect of prevention measures on incidence of human listeriosis, France, 1987-1997. Emerg Infect Dis 2001; 7:983-9. [PMID: 11747725 PMCID: PMC2631910 DOI: 10.3201/eid0706.010610] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
To assess the impact of preventive measures by the food industry, we analyzed food monitoring data as well as trends in the incidence of listeriosis estimated through three independent sources: the National Reference Center of Listeriosis; a laboratory-based active surveillance network; and two consecutive nationwide surveys of public hospital laboratories. From 1987 to 1997, the incidence of listeriosis decreased by an estimated 68%. A substantial reduction in the proportion of Listeria monocytogenes-contaminated products was observed at the retail level. The temporal relationship between prevention measures by the food industry, reduction in L. monocytogenes-contaminated foodstuffs, and reduction in listeriosis incidence suggests a causal relationship and indicates that a substantial part of the reduction in illness is related to prevention efforts.
Collapse
Affiliation(s)
- V Goulet
- Department of Infectious Diseases, Institut de Veille Sanitaire, Saint-Maurice, France.
| | | | | | | | | | | | | | | |
Collapse
|
27
|
Lafon C, Mathieu C, Guerrin M, Pierre O, Vidal S, Valette A. Transforming growth factor beta 1-induced apoptosis in human ovarian carcinoma cells: protection by the antioxidant N-acetylcysteine and bcl-2. Cell Growth Differ 1996; 7:1095-1104. [PMID: 8853906] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
We have previously shown that transforming growth factor beta 1 (TGF-beta 1) inhibits growth and induces apoptosis in NIH-OVCAR-3 ovarian adenocarcinoma cells. In this study, we investigated the role of the reactive oxygen species in the TGF-beta 1 signaling pathways. We found that both TGF-beta 1 and an oxidant, hydrogen peroxide, rapidly increase the expression of c-fos and c-jun genes and induce cell death by apoptosis; these effects are inhibited by the antioxidant N-acetylcysteine. In contrast, N-acetylcysteine did not influence TGF-beta 1-mediated cell cycle arrest at the G1-S transition. TGF-beta 1 down-regulated the endogenous expression of the anti-apoptotic bcl-2 gene, and overexpression of this gene inhibited TGF-beta 1-induced apoptosis. Taken together, these results suggest that TGF-beta 1 activates multiple signaling pathways in the NIH-OVCAR-3 cell line and that the reactive oxygen species play a role in the early gene responses and apoptosis induced by TGF-beta 1.
Collapse
Affiliation(s)
- C Lafon
- Laboratoire de Pharmacologie et Toxicologie Fondamentales, Centre National de la Recherche Scientifique, Toulouse, France
| | | | | | | | | | | |
Collapse
|
28
|
Rocourt J, Goulet V, Lepoutre-Toulemon A, Jacquet C, Catimel B, Rebiere I, Miegeville A, Courtieu A, Pierre O, Dehaumont P, Veit P. Epidémie de listériose en France en 1992. Med Mal Infect 1993. [DOI: 10.1016/s0399-077x(05)80832-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
29
|
Zajdela F, Tambourin P, Wendling F, Pierre O. [Formation of viral particles on erythrocyte membrane of mice injected with Friend virus]. C R Acad Hebd Seances Acad Sci D 1968; 267:2394-6. [PMID: 4975958] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
|