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El-Sayed ESR, Mohamed SS, Mousa SA, El-Seoud MAA, Elmehlawy AA, Abdou DAM. Bifunctional role of some biogenic nanoparticles in controlling wilt disease and promoting growth of common bean. AMB Express 2023; 13:41. [PMID: 37119397 PMCID: PMC10148937 DOI: 10.1186/s13568-023-01546-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Accepted: 04/16/2023] [Indexed: 05/01/2023] Open
Abstract
In the present era, nanomaterials are emerging as a powerful tool for management of plant disease and improving crop production to meet the growing global need for food. Thus, this paper was conducted to explore the effectiveness of five different types of nanoparticles (NPs) viz., Co3O4NPs, CuONPs, Fe3O4NPs, NiONPs, and ZnONPs as treatments for Fusarium wilt as well as their role in promoting growth of the common bean plant. The five types of NPs were applied as a treatment for wilt in two ways, therapeutic and protective plans under greenhouse conditions. In vivo experiments showed that all types of NPs significantly increased disease control and diminished the symptoms of Fusarium wilt for both incidence and severity. The recorded values for disease control using the respective NPs during the protective plan were 82.77, 60.17, 49.67, 38.23, and 70.59%. Meanwhile these values were 92.84, 64.67, 51.33, 45.61, 73.84% during the therapeutic plan. Moreover, CuONPs during the protective plan were the best among the five types of NPs employed in terms of wilt disease management. Regarding the use of these NPs as growth promoters, the obtained results confirmed the effectiveness of the five types of NPs in enhancing vegetative growth of the plant under greenhouse conditions, in comparison with control. Among the five NPs, CuONPs improved the plant vegetative growth and particularly increased the content of the photosynthetic pigments; chlorophyll-a (2.96 mg/g), -b (1.93 mg/g), and total carotenoids (1.16 mg/g). These findings suggest the successful and potential exploitation of nanomaterials in agriculture deployed as nano-based products including nano-fungicides and nano-fertilizers. In terms of sustainability, this promising and exceptional multifunctional role of these nanomaterials will surely exert positive impacts on both the environment and sustainable agriculture.
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Affiliation(s)
- El-Sayed R El-Sayed
- Plant Research Department, Nuclear Research Center, Egyptian Atomic Energy Authority, Cairo, Egypt.
| | - Samar S Mohamed
- Microbiology Department, Faculty of Science, Ain Shams University, Cairo, Egypt
| | - Shaimaa A Mousa
- Plant Research Department, Nuclear Research Center, Egyptian Atomic Energy Authority, Cairo, Egypt
| | - Mohamed A Abo El-Seoud
- Plant Research Department, Nuclear Research Center, Egyptian Atomic Energy Authority, Cairo, Egypt
| | - Adel A Elmehlawy
- Microbiology Department, Faculty of Science, Ain Shams University, Cairo, Egypt
| | - Dalia A M Abdou
- Microbiology Department, Faculty of Science, Ain Shams University, Cairo, Egypt
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Cheng SS, Ku YS, Cheung MY, Lam HM. Identification of stably expressed reference genes for expression studies in Arabidopsis thaliana using mass spectrometry-based label-free quantification. FRONTIERS IN PLANT SCIENCE 2022; 13:1001920. [PMID: 36247637 PMCID: PMC9557097 DOI: 10.3389/fpls.2022.1001920] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/24/2022] [Accepted: 08/29/2022] [Indexed: 06/16/2023]
Abstract
Arabidopsis thaliana has been used regularly as a model plant in gene expression studies on transcriptional reprogramming upon pathogen infection, such as that by Pseudomonas syringae pv. tomato DC3000 (Pst DC3000), or when subjected to stress hormone treatments including jasmonic acid (JA), salicylic acid (SA), and abscisic acid (ABA). Reverse transcription-quantitative polymerase chain reaction (RT-qPCR) has been extensively employed to quantitate these gene expression changes. However, the accuracy of the quantitation is largely dependent on the stability of the expressions of reference genes used for normalization. Recently, RNA sequencing (RNA-seq) has been widely used to mine stably expressed genes for use as references in RT-qPCR. However, the amplification step in RNA-seq creates an intrinsic bias against those genes with relatively low expression levels, and therefore does not provide an accurate quantification of all expressed genes. In this study, we employed mass spectrometry-based label-free quantification (LFQ) in proteomic analyses to identify those proteins with abundances unaffected by Pst DC3000 infection. We verified, using RT-qPCR, that the levels of their corresponding mRNAs were also unaffected by Pst DC3000 infection. Compared to commonly used reference genes for expression studies in A. thaliana upon Pst DC3000 infection, the candidate reference genes reported in this study generally have a higher expression stability. In addition, using RT-qPCR, we verified that the mRNAs of the candidate reference genes were stably expressed upon stress hormone treatments including JA, SA, and ABA. Results indicated that the candidate genes identified here had stable expressions upon these stresses and are suitable to be used as reference genes for RT-qPCR. Among the 18 candidate reference genes reported in this study, many of them had greater expression stability than the commonly used reference genes, such as ACT7, in previous studies. Here, besides proposing more appropriate reference genes for Arabidopsis expression studies, we also demonstrated the capacity of mass spectrometry-based LFQ to quantify protein abundance and the possibility to extend protein expression studies to the transcript level.
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Ortega-Cuadros M, De Souza TL, Berruyer R, Aligon S, Pelletier S, Renou JP, Arias T, Campion C, Guillemette T, Verdier J, Grappin P. Seed Transmission of Pathogens: Non-Canonical Immune Response in Arabidopsis Germinating Seeds Compared to Early Seedlings against the Necrotrophic Fungus Alternaria brassicicola. PLANTS 2022; 11:plants11131708. [PMID: 35807659 PMCID: PMC9269218 DOI: 10.3390/plants11131708] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Revised: 06/23/2022] [Accepted: 06/24/2022] [Indexed: 11/16/2022]
Abstract
The transmission of seed-borne pathogens by the germinating seed is responsible for major crop diseases. The immune responses of the seed facing biotic invaders are poorly documented so far. The Arabidopsis thaliana/Alternaria brassicicola patho-system was used to describe at the transcription level the responses of germinating seeds and young seedling stages to infection by the necrotrophic fungus. RNA-seq analyses of healthy versus inoculated seeds at 3 days after sowing (DAS), stage of radicle emergence, and at 6 and 10 DAS, two stages of seedling establishment, identified thousands of differentially expressed genes by Alternaria infection. Response to hypoxia, ethylene and indole pathways were found to be induced by Alternaria in the germinating seeds. However, surprisingly, the defense responses, namely the salicylic acid (SA) pathway, the response to reactive oxygen species (ROS), the endoplasmic reticulum-associated protein degradation (ERAD) and programmed cell death, were found to be strongly induced only during the latter post-germination stages. We propose that this non-canonical immune response in early germinating seeds compared to early seedling establishment was potentially due to the seed-to-seedling transition phase. Phenotypic analyses of about 14 mutants altered in the main defense pathways illustrated these specific defense responses. The unexpected germination deficiency and insensitivity to Alternaria in the glucosinolate deficient mutants allow hypothesis of a trade-off between seed germination, necrosis induction and Alternaria transmission to the seedling. The imbalance of the SA and jasmonic acid (JA) pathways to the detriment of the JA also illustrated a non-canonical immune response at the first stages of the seedling.
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Affiliation(s)
- Mailen Ortega-Cuadros
- Faculty of Exact and Natural Sciences, Institute of Biology, University City Campus, University of Antioquia, Calle 67 N°53-108, Medellín 050010, Colombia;
- Institut Agro, University Angers, INRAE, IRHS, SFR 4207 QuaSaV, F-49000 Angers, France; (T.L.D.S.); (R.B.); (S.A.); (S.P.); (J.-P.R.); (C.C.); (T.G.); (J.V.)
| | - Tiago Lodi De Souza
- Institut Agro, University Angers, INRAE, IRHS, SFR 4207 QuaSaV, F-49000 Angers, France; (T.L.D.S.); (R.B.); (S.A.); (S.P.); (J.-P.R.); (C.C.); (T.G.); (J.V.)
| | - Romain Berruyer
- Institut Agro, University Angers, INRAE, IRHS, SFR 4207 QuaSaV, F-49000 Angers, France; (T.L.D.S.); (R.B.); (S.A.); (S.P.); (J.-P.R.); (C.C.); (T.G.); (J.V.)
| | - Sophie Aligon
- Institut Agro, University Angers, INRAE, IRHS, SFR 4207 QuaSaV, F-49000 Angers, France; (T.L.D.S.); (R.B.); (S.A.); (S.P.); (J.-P.R.); (C.C.); (T.G.); (J.V.)
| | - Sandra Pelletier
- Institut Agro, University Angers, INRAE, IRHS, SFR 4207 QuaSaV, F-49000 Angers, France; (T.L.D.S.); (R.B.); (S.A.); (S.P.); (J.-P.R.); (C.C.); (T.G.); (J.V.)
| | - Jean-Pierre Renou
- Institut Agro, University Angers, INRAE, IRHS, SFR 4207 QuaSaV, F-49000 Angers, France; (T.L.D.S.); (R.B.); (S.A.); (S.P.); (J.-P.R.); (C.C.); (T.G.); (J.V.)
| | - Tatiana Arias
- Marie Selby Botanical Gardens, Downtown Sarasota Campus, 1534 Mound Street, Sarasota, FL 34236, USA;
| | - Claire Campion
- Institut Agro, University Angers, INRAE, IRHS, SFR 4207 QuaSaV, F-49000 Angers, France; (T.L.D.S.); (R.B.); (S.A.); (S.P.); (J.-P.R.); (C.C.); (T.G.); (J.V.)
| | - Thomas Guillemette
- Institut Agro, University Angers, INRAE, IRHS, SFR 4207 QuaSaV, F-49000 Angers, France; (T.L.D.S.); (R.B.); (S.A.); (S.P.); (J.-P.R.); (C.C.); (T.G.); (J.V.)
| | - Jérome Verdier
- Institut Agro, University Angers, INRAE, IRHS, SFR 4207 QuaSaV, F-49000 Angers, France; (T.L.D.S.); (R.B.); (S.A.); (S.P.); (J.-P.R.); (C.C.); (T.G.); (J.V.)
| | - Philippe Grappin
- Institut Agro, University Angers, INRAE, IRHS, SFR 4207 QuaSaV, F-49000 Angers, France; (T.L.D.S.); (R.B.); (S.A.); (S.P.); (J.-P.R.); (C.C.); (T.G.); (J.V.)
- Correspondence: ; Tel.: +33-249-180-483
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Bréard D, Barrit T, Sochard D, Aligon S, Planchet E, Teulat B, Le Corff J, Campion C, Guilet D. Development of a quantification method for routine analysis of glucosinolates and camalexin in brassicaceous small-sized samples by simultaneous extraction prior to liquid chromatography determination. J Chromatogr B Analyt Technol Biomed Life Sci 2022; 1205:123348. [PMID: 35777257 DOI: 10.1016/j.jchromb.2022.123348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Revised: 06/13/2022] [Accepted: 06/14/2022] [Indexed: 11/25/2022]
Abstract
Glucosinolates and camalexin are secondary metabolites that, as phytoanticipins and phytoalexins, play a crucial role in plant defence. The present work proposes an improved analytical method for routine analysis and quantification of glucosinolates and camalexin in brassicaceous small-sized samples by using the very specific desulfation process of glucosinolates analysis and the specificity of fluorescence detection for camalexin analysis. The approach is based on a simultaneous ultrasound-assisted extraction followed by a purification on an anion-exchange column. Final analyses are conducted by HPLC-UV-MS for desulfo-glucosinolates and HPLC coupled to a fluorescence detector (HPLC-FLD) for camalexin. The method is linear for glucosinolates (50-3500 µM) and camalexin (0.025-5 µg.mL-1) with an LOD/LOQ of 3.8/12.6 µM and 0.014/0.046 µg.mL-1 respectively. The method demonstrated adequate precision, accuracy and trueness on certified reference rapeseed. A practical application of our approach was conducted on different Brassicaceae genera (Barbarea vulgaris, Brassica nigra, Capsella bursa-pastoris, Cardamine hirsuta, Coincya monensis, Sinapis arvensis, and Sisymbrium officinale) and Arabidopsis thaliana genotypes (Columbia and Wassilewskija). Futhermore, different plant organs (seeds and leaves) were analysed, previously inoculated or not with the pathogenic fungus Alternaria brassicicola.
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Affiliation(s)
| | - Thibault Barrit
- Univ Angers, Institut Agro, INRAE, IRHS, SFR QUASAV, F-49000 Angers, France
| | - Daniel Sochard
- Univ Angers, Institut Agro, INRAE, IRHS, SFR QUASAV, F-49000 Angers, France
| | - Sophie Aligon
- Univ Angers, Institut Agro, INRAE, IRHS, SFR QUASAV, F-49000 Angers, France
| | - Elisabeth Planchet
- Univ Angers, Institut Agro, INRAE, IRHS, SFR QUASAV, F-49000 Angers, France
| | - Béatrice Teulat
- Univ Angers, Institut Agro, INRAE, IRHS, SFR QUASAV, F-49000 Angers, France
| | - Josiane Le Corff
- Univ Angers, Institut Agro, INRAE, IRHS, SFR QUASAV, F-49000 Angers, France
| | - Claire Campion
- Univ Angers, Institut Agro, INRAE, IRHS, SFR QUASAV, F-49000 Angers, France
| | - David Guilet
- Univ Angers, SONAS, SFR QUASAV, F-49000 Angers, France
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Ban LP, Li JD, Yan M, Gao YH, Zhang JJ, Moural TW, Zhu F, Wang XM. Illumina Sequencing of 18S/16S rRNA Reveals Microbial Community Composition, Diversity, and Potential Pathogens in 17 Turfgrass Seeds. PLANT DISEASE 2021; 105:1328-1338. [PMID: 33084546 DOI: 10.1094/pdis-06-18-0946-re] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The increasing need for turfgrass seeds is coupled with the high risk of dangerous microbial pathogens being transmitted through the domestic and international trade of seeds. Concerns continue to be raised about seed safety and quality. Here, we show that next-generation sequencing (NGS) of DNA represents an effective and reliable tactic to monitor the microbial communities within turfgrass seeds. A comparison of DNA sequence data with reference databases revealed the presence of 26 different fungal orders. Among them, serious plant disease pathogens such as Bipolaris sorokiniana, Boeremia exigua, Claviceps purpurea, and Rhizoctonia zeae were detected. Seedborne bacteria, including Erwinia persicina and Acidovorax avenae, were identified from different bacterial orders. Our study indicated that the traditional culturing method and the NGS approach for pathogen identification complement each other. The reliability of culturing and NGS methods was further validated by PCR with specific primers. The combination of these different techniques ensures maximum sensitivity and specificity for turfgrass seed pathogen testing assay.
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Affiliation(s)
- Li-Ping Ban
- College of Grassland Science and Technology, China Agricultural University, Beijing 100193, China
| | - Jin-Dong Li
- College of Grassland Science and Technology, China Agricultural University, Beijing 100193, China
| | - Min Yan
- Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China
- National Animal Husbandry Station, Ministry of Agriculture, Beijing 100125, China
| | - Yu-Hao Gao
- The Affiliated High School of Peking University, Beijing 100190, China
| | - Jin-Jin Zhang
- Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Timothy W Moural
- Department of Entomology, Pennsylvania State University, University Park, PA 16802, U.S.A
| | - Fang Zhu
- Department of Entomology, Pennsylvania State University, University Park, PA 16802, U.S.A
| | - Xue-Min Wang
- Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China
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Tenuazonic Acid-Triggered Cell Death Is the Essential Prerequisite for Alternaria alternata (Fr.) Keissler to Infect Successfully Host Ageratina adenophora. Cells 2021; 10:cells10051010. [PMID: 33922952 PMCID: PMC8145236 DOI: 10.3390/cells10051010] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Revised: 04/20/2021] [Accepted: 04/23/2021] [Indexed: 01/13/2023] Open
Abstract
The necrotrophic fungus Alternaria alternata contains different pathotypes that produce different mycotoxins. The pathotype Ageratina adenophora secretes the non-host-selective toxin tenuazonic acid (TeA), which can cause necrosis in many plants. Although TeA is thought to be a central virulence factor of the A. adenophora pathotype, the precise role of TeA in different stages of host infection by pathogens remains unclear. Here, an A. alternata wild-type and the toxin-deficient mutant ΔHP001 with a 75% reduction in TeA production were used. It was observed that wild-type pathogens could induce the reactive oxygen species (ROS) bursts in host leaves and killed photosynthetic cells before invading hyphae. The ROS interceptor catalase remarkably inhibited hyphal penetration and invasive hyphal growth and expansion in infected leaves and suppressed necrotic leaf lesion. This suggests that the production of ROS is critical for pathogen invasion and proliferation and disease symptom formation during infection. It was found that the mutant pathogens did not cause the formation of ROS and cell death in host leaves, showing an almost complete loss of disease susceptibility. In addition, the lack of TeA resulted in a significant reduction in the ability of the pathogen to penetrate invasive hyphal growth and spread. The addition of exogenous TeA, AAL-toxin, and bentazone to the mutant ΔHP001 pathogens during inoculation resulted in a significant restoration of pathogenicity by increasing the level of cell death, frequency of hyphal penetration, and extent of invasive hyphal spread. Our results suggest that cell death triggered by TeA is the essential requirement for successful colonization and disease development in host leaves during infection with A. adenophora pathogens.
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Kang CH, Park JH, Lee ES, Paeng SK, Chae HB, Hong JC, Lee SY. Redox-Dependent Structural Modification of Nucleoredoxin Triggers Defense Responses against Alternaria brassicicola in Arabidopsis. Int J Mol Sci 2020; 21:ijms21239196. [PMID: 33276577 PMCID: PMC7730559 DOI: 10.3390/ijms21239196] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Revised: 11/21/2020] [Accepted: 12/01/2020] [Indexed: 11/25/2022] Open
Abstract
In plants, thioredoxin (TRX) family proteins participate in various biological processes by regulating the oxidative stress response. However, their role in phytohormone signaling remains largely unknown. In this study, we investigated the functions of TRX proteins in Arabidopsis thaliana. Quantitative polymerase chain reaction (qPCR) experiments revealed that the expression of ARABIDOPSIS NUCLEOREDOXIN 1 (AtNRX1) is specifically induced by the application of jasmonic acid (JA) and upon inoculation with a necrotrophic fungal pathogen, Alternaria brassicicola. The AtNRX1 protein usually exists as a low molecular weight (LMW) monomer and functions as a reductase, but under oxidative stress AtNRX1 transforms into polymeric forms. However, the AtNRX1M3 mutant protein, harboring four cysteine-to-serine substitutions in the TRX domain, did not show structural modification under oxidative stress. The Arabidopsisatnrx1 null mutant showed greater resistance to A. brassicicola than wild-type plants. In addition, plants overexpressing both AtNRX1 and AtNRX1M3 were susceptible to A. brassicicola infection. Together, these findings suggest that AtNRX1 normally suppresses the expression of defense-responsive genes, as if it were a safety pin, but functions as a molecular sensor through its redox-dependent structural modification to induce disease resistance in plants.
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Vergnes S, Gayrard D, Veyssière M, Toulotte J, Martinez Y, Dumont V, Bouchez O, Rey T, Dumas B. Phyllosphere Colonization by a Soil Streptomyces sp. Promotes Plant Defense Responses Against Fungal Infection. MOLECULAR PLANT-MICROBE INTERACTIONS : MPMI 2020; 33:223-234. [PMID: 31544656 DOI: 10.1094/mpmi-05-19-0142-r] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Streptomycetes are soil-dwelling, filamentous actinobacteria and represent a prominent bacterial clade inside the plant root microbiota. The ability of streptomycetes to produce a broad spectrum of antifungal metabolites suggests that these bacteria could be used to manage plant diseases. Here, we describe the identification of a soil Streptomyces strain named AgN23 which strongly activates a large array of defense responses when applied on Arabidopsis thaliana leaves. AgN23 increased the biosynthesis of salicylic acid, leading to the development of salicylic acid induction deficient 2 (SID2)-dependent necrotic lesions. Size exclusion fractionation of plant elicitors secreted by AgN23 showed that these signals are tethered into high molecular weight complexes. AgN23 mycelium was able to colonize the leaf surface, leading to plant resistance against Alternaria brassicicola infection in wild-type Arabidopsis plants. AgN23-induced resistance was found partially compromised in salicylate, jasmonate, and ethylene mutants. Our data show that Streptomyces soil bacteria can develop at the surface of plant leaves to induce defense responses and protection against foliar fungal pathogens, extending their potential use to manage plant diseases.
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Affiliation(s)
- Sophie Vergnes
- Laboratoire de Recherche en Sciences Végétales, Université de Toulouse, CNRS, UPS, France
| | - Damien Gayrard
- Laboratoire de Recherche en Sciences Végétales, Université de Toulouse, CNRS, UPS, France
- De Sangosse, Bonnel, 47480 Pont-Du-Casse, France
| | - Marine Veyssière
- Laboratoire de Recherche en Sciences Végétales, Université de Toulouse, CNRS, UPS, France
| | - Justine Toulotte
- Laboratoire de Recherche en Sciences Végétales, Université de Toulouse, CNRS, UPS, France
| | - Yves Martinez
- CNRS, Plateforme Imagerie-Microscopie, Fédération de Recherche FR3450, Castanet-Tolosan, France
| | - Valérie Dumont
- CRITT-Bio-industries, INSA, 135 avenue de Rangueil, 31077 Toulouse Cedex 4, France
| | - Olivier Bouchez
- INRA, US 1426, GeT-PlaGe, Genotoul, Castanet-Tolosan, France
| | - Thomas Rey
- Laboratoire de Recherche en Sciences Végétales, Université de Toulouse, CNRS, UPS, France
- De Sangosse, Bonnel, 47480 Pont-Du-Casse, France
| | - Bernard Dumas
- Laboratoire de Recherche en Sciences Végétales, Université de Toulouse, CNRS, UPS, France
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Colou J, N'Guyen GQ, Dubreu O, Fontaine K, Kwasiborski A, Bastide F, Manero F, Hamon B, Aligon S, Simoneau P, Guillemette T. Role of membrane compartment occupied by Can1 (MCC) and eisosome subdomains in plant pathogenicity of the necrotrophic fungus Alternaria brassicicola. BMC Microbiol 2019; 19:295. [PMID: 31842747 PMCID: PMC6916069 DOI: 10.1186/s12866-019-1667-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Accepted: 11/28/2019] [Indexed: 12/29/2022] Open
Abstract
BACKGROUND MCC/eisosomes are membrane microdomains that have been proposed to participate in the plasma membrane function in particular by regulating the homeostasis of lipids, promoting the recruitment of specific proteins and acting as provider of membrane reservoirs. RESULTS Here we showed that several potential MCC/eisosomal protein encoding genes in the necrotrophic fungus A. brassicicola were overexpressed when germinated spores were exposed to antimicrobial defence compounds, osmotic and hydric stresses, which are major constraints encountered by the fungus during the plant colonization process. Mutants deficient for key MCC/eisosome components did not exhibit any enhanced susceptibility to phytoalexins and to applied stress conditions compared to the reference strain, except for a slight hypersensitivity of the ∆∆abpil1a-abpil1b strain to 2 M sorbitol. Depending on the considered mutants, we showed that the leaf and silique colonization processes were impaired by comparison to the wild-type, and assumed that these defects in aggressiveness were probably caused by a reduced appressorium formation rate. CONCLUSIONS This is the first study on the role of MCC/eisosomes in the pathogenic process of a plant pathogenic fungus. A link between these membrane domains and the fungus ability to form functional penetration structures was shown, providing new potential directions for plant disease control strategies.
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Affiliation(s)
- Justine Colou
- Institut de Recherche en Horticulture et Semences - UMR 1345, INRA, Université d'Angers, Agrocampus-Ouest, SFR 4207 QuaSaV, 42 rue Georges Morel, 49071 Beaucouzé Cedex, Angers, France
| | - Guillaume Quang N'Guyen
- Institut de Recherche en Horticulture et Semences - UMR 1345, INRA, Université d'Angers, Agrocampus-Ouest, SFR 4207 QuaSaV, 42 rue Georges Morel, 49071 Beaucouzé Cedex, Angers, France.,Institut de Biologie Intégrative et des Systèmes, Département de Biologie, PROTEO, Université Laval, Pavillon Charles-Eugène-Marchand, 1030 Avenue de la Médecine, QC, Québec, G1V 0A6, Canada
| | - Ophélie Dubreu
- Institut de Recherche en Horticulture et Semences - UMR 1345, INRA, Université d'Angers, Agrocampus-Ouest, SFR 4207 QuaSaV, 42 rue Georges Morel, 49071 Beaucouzé Cedex, Angers, France
| | - Kévin Fontaine
- Institut de Recherche en Horticulture et Semences - UMR 1345, INRA, Université d'Angers, Agrocampus-Ouest, SFR 4207 QuaSaV, 42 rue Georges Morel, 49071 Beaucouzé Cedex, Angers, France.,ANSES, Laboratoire de la Santé des Végétaux, Unité de Mycologie, Domaine de Pixérécourt, 54220, Malzéville, France
| | - Anthony Kwasiborski
- Institut de Recherche en Horticulture et Semences - UMR 1345, INRA, Université d'Angers, Agrocampus-Ouest, SFR 4207 QuaSaV, 42 rue Georges Morel, 49071 Beaucouzé Cedex, Angers, France
| | - Franck Bastide
- Institut de Recherche en Horticulture et Semences - UMR 1345, INRA, Université d'Angers, Agrocampus-Ouest, SFR 4207 QuaSaV, 42 rue Georges Morel, 49071 Beaucouzé Cedex, Angers, France
| | - Florence Manero
- Plateforme SCIAM, Institut de Biologie en Santé, CHU, Université d'Angers, 4, Rue Larrey, 49933, Angers Cedex, France
| | - Bruno Hamon
- Institut de Recherche en Horticulture et Semences - UMR 1345, INRA, Université d'Angers, Agrocampus-Ouest, SFR 4207 QuaSaV, 42 rue Georges Morel, 49071 Beaucouzé Cedex, Angers, France
| | - Sophie Aligon
- Institut de Recherche en Horticulture et Semences - UMR 1345, INRA, Université d'Angers, Agrocampus-Ouest, SFR 4207 QuaSaV, 42 rue Georges Morel, 49071 Beaucouzé Cedex, Angers, France
| | - Philippe Simoneau
- Institut de Recherche en Horticulture et Semences - UMR 1345, INRA, Université d'Angers, Agrocampus-Ouest, SFR 4207 QuaSaV, 42 rue Georges Morel, 49071 Beaucouzé Cedex, Angers, France
| | - Thomas Guillemette
- Institut de Recherche en Horticulture et Semences - UMR 1345, INRA, Université d'Angers, Agrocampus-Ouest, SFR 4207 QuaSaV, 42 rue Georges Morel, 49071 Beaucouzé Cedex, Angers, France.
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N'Guyen GQ, Raulo R, Marchi M, Agustí-Brisach C, Iacomi B, Pelletier S, Renou JP, Bataillé-Simoneau N, Campion C, Bastide F, Hamon B, Mouchès C, Porcheron B, Lemoine R, Kwasiborski A, Simoneau P, Guillemette T. Responses to Hydric Stress in the Seed-Borne Necrotrophic Fungus Alternaria brassicicola. Front Microbiol 2019; 10:1969. [PMID: 31543870 PMCID: PMC6730492 DOI: 10.3389/fmicb.2019.01969] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Accepted: 08/09/2019] [Indexed: 02/06/2023] Open
Abstract
Alternaria brassicicola is a necrotrophic fungus causing black spot disease and is an economically important seed-borne pathogen of cultivated brassicas. Seed transmission is a crucial component of its parasitic cycle as it promotes long-term survival and dispersal. Recent studies, conducted with the Arabidopsis thaliana/A. brassicicola pathosystem, showed that the level of susceptibility of the fungus to water stress strongly influenced its seed transmission ability. In this study, we gained further insights into the mechanisms involved in the seed infection process by analyzing the transcriptomic and metabolomic responses of germinated spores of A. brassicicola exposed to water stress. Then, the repertoire of putative hydrophilins, a group of proteins that are assumed to be involved in cellular dehydration tolerance, was established in A. brassicicola based on the expression data and additional structural and biochemical criteria. Phenotyping of single deletion mutants deficient for fungal hydrophilin-like proteins showed that they were affected in their transmission to A. thaliana seeds, although their aggressiveness on host vegetative tissues remained intact.
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Affiliation(s)
- Guillaume Quang N'Guyen
- Institut de Recherche en Horticulture et Semences - UMR 1345, INRA, Université d'Angers, Agrocampus-Ouest, SFR 4207 QUASAV, Angers, France
| | - Roxane Raulo
- Université de Lille, INRA, ISA, Université d'Artois, Université du Littoral Côte d'Opale, EA 7394 - ICV - Institut Charles Viollette, Lille, France
| | - Muriel Marchi
- Institut de Recherche en Horticulture et Semences - UMR 1345, INRA, Université d'Angers, Agrocampus-Ouest, SFR 4207 QUASAV, Angers, France
| | | | - Beatrice Iacomi
- Department of Plant Sciences, University of Agronomic Sciences and Veterinary Medicine of Bucharest, Bucharest, Romania
| | - Sandra Pelletier
- Institut de Recherche en Horticulture et Semences - UMR 1345, INRA, Université d'Angers, Agrocampus-Ouest, SFR 4207 QUASAV, Angers, France
| | - Jean-Pierre Renou
- Institut de Recherche en Horticulture et Semences - UMR 1345, INRA, Université d'Angers, Agrocampus-Ouest, SFR 4207 QUASAV, Angers, France
| | - Nelly Bataillé-Simoneau
- Institut de Recherche en Horticulture et Semences - UMR 1345, INRA, Université d'Angers, Agrocampus-Ouest, SFR 4207 QUASAV, Angers, France
| | - Claire Campion
- Institut de Recherche en Horticulture et Semences - UMR 1345, INRA, Université d'Angers, Agrocampus-Ouest, SFR 4207 QUASAV, Angers, France
| | - Franck Bastide
- Institut de Recherche en Horticulture et Semences - UMR 1345, INRA, Université d'Angers, Agrocampus-Ouest, SFR 4207 QUASAV, Angers, France
| | - Bruno Hamon
- Institut de Recherche en Horticulture et Semences - UMR 1345, INRA, Université d'Angers, Agrocampus-Ouest, SFR 4207 QUASAV, Angers, France
| | - Chloé Mouchès
- Institut de Recherche en Horticulture et Semences - UMR 1345, INRA, Université d'Angers, Agrocampus-Ouest, SFR 4207 QUASAV, Angers, France
| | - Benoit Porcheron
- Equipe "Sucres & Echanges Végétaux-Environnement," UMR CNRS 7267 EBI Ecologie et Biologie des Interactions, Université de Poitiers, Poitiers, France
| | - Remi Lemoine
- Equipe "Sucres & Echanges Végétaux-Environnement," UMR CNRS 7267 EBI Ecologie et Biologie des Interactions, Université de Poitiers, Poitiers, France
| | - Anthony Kwasiborski
- Institut de Recherche en Horticulture et Semences - UMR 1345, INRA, Université d'Angers, Agrocampus-Ouest, SFR 4207 QUASAV, Angers, France
| | - Philippe Simoneau
- Institut de Recherche en Horticulture et Semences - UMR 1345, INRA, Université d'Angers, Agrocampus-Ouest, SFR 4207 QUASAV, Angers, France
| | - Thomas Guillemette
- Institut de Recherche en Horticulture et Semences - UMR 1345, INRA, Université d'Angers, Agrocampus-Ouest, SFR 4207 QUASAV, Angers, France
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11
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Kumari M, Giri VP, Pandey S, Kumar M, Katiyar R, Nautiyal CS, Mishra A. An insight into the mechanism of antifungal activity of biogenic nanoparticles than their chemical counterparts. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2019; 157:45-52. [PMID: 31153476 DOI: 10.1016/j.pestbp.2019.03.005] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2018] [Revised: 02/09/2019] [Accepted: 03/04/2019] [Indexed: 05/24/2023]
Abstract
Herein, we describe the enhanced antifungal activity of silver nanoparticles biosynthesized by cell free filtrate of Trichoderma viride (MTCC 5661) in comparison to chemically synthesized silver nanoparticles (CSNP) of similar shape and size. Biosynthesized silver nanoparticles (BSNP) enhanced the reduction in dry weight by 20 and 48.8% of fungal pathogens Fusarium oxysporum and Alternaria brassicicola respectively in comparison to their chemical counterparts (CSNP). Nitroblue tetrazolium and Propidium iodide staining demonstrated the higher generation of superoxide radicals lead to higher death in BSNP treated fungus in comparison to CSNP. Scanning electron microscopy of A. brassicicola revealed the osmotic imbalance and membrane disintegrity to be major cause for fungal cell death after treatment with BSNP. To gain an insight into the mechanistic aspect of enhanced fungal cell death after treatment of BSNP in comparison to CSNP, stress responses and real time PCR analysis was carried out with A. brassicicola. It revealed that generation of ROS, downregulation of antioxidant machinery and oxidative enzymes, disruption of osmotic balance and cellular integrity, and loss of virulence are the mechanisms employed by BSNP which establishes them as superior antifungal agent than their chemical counterparts. With increasing drug resistance and ubiquitous presence of fungal pathogens in plant kingdom, BSNP bears the candidature for new generation of antifungal agent.
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Affiliation(s)
- Madhuree Kumari
- CSIR-National Botanical Research Institute, Rana Pratap Marg, Lucknow 226 001, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Ved P Giri
- CSIR-National Botanical Research Institute, Rana Pratap Marg, Lucknow 226 001, India; Department of Botany, Lucknow University, Hasanganj, Lucknow 226 007, India
| | - Shipra Pandey
- CSIR-National Botanical Research Institute, Rana Pratap Marg, Lucknow 226 001, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Manoj Kumar
- CSIR-Indian Institute of Toxicology Research, Vishvigyan Bhawan 31, Mahatma Gandhi Marg, Lucknow 226 001, India
| | - Ratna Katiyar
- Department of Botany, Lucknow University, Hasanganj, Lucknow 226 007, India
| | - Chandra S Nautiyal
- CSIR-National Botanical Research Institute, Rana Pratap Marg, Lucknow 226 001, India
| | - Aradhana Mishra
- CSIR-National Botanical Research Institute, Rana Pratap Marg, Lucknow 226 001, India.
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12
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Torres-Cortés G, Garcia BJ, Compant S, Rezki S, Jones P, Préveaux A, Briand M, Roulet A, Bouchez O, Jacobson D, Barret M. Differences in resource use lead to coexistence of seed-transmitted microbial populations. Sci Rep 2019; 9:6648. [PMID: 31040301 PMCID: PMC6491768 DOI: 10.1038/s41598-019-42865-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Accepted: 03/15/2019] [Indexed: 11/18/2022] Open
Abstract
Seeds are involved in the vertical transmission of microorganisms in plants and act as reservoirs for the plant microbiome. They could serve as carriers of pathogens, making the study of microbial interactions on seeds important in the emergence of plant diseases. We studied the influence of biological disturbances caused by seed transmission of two phytopathogenic agents, Alternaria brassicicola Abra43 (Abra43) and Xanthomonas campestris pv. campestris 8004 (Xcc8004), on the structure and function of radish seed microbial assemblages, as well as the nutritional overlap between Xcc8004 and the seed microbiome, to find seed microbial residents capable of outcompeting this pathogen. According to taxonomic and functional inference performed on metagenomics reads, no shift in structure and function of the seed microbiome was observed following Abra43 and Xcc8004 transmission. This lack of impact derives from a limited overlap in nutritional resources between Xcc8004 and the major bacterial populations of radish seeds. However, two native seed-associated bacterial strains belonging to Stenotrophomonas rhizophila displayed a high overlap with Xcc8004 regarding the use of resources; they might therefore limit its transmission. The strategy we used may serve as a foundation for the selection of seed indigenous bacterial strains that could limit seed transmission of pathogens.
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Affiliation(s)
- G Torres-Cortés
- IRHS, Agrocampus-Ouest, INRA, Université d'Angers, SFR4207 QuaSaV, 49071, Beaucouzé, France.
| | - B J Garcia
- Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee, USA
| | - S Compant
- AIT Austrian Institute of Technology GmbH, Center for Health and Bioresources, Bioresources Unit, Konrad Lorenz Straße 24, A-3430, Tulln, Austria
| | - S Rezki
- IRHS, Agrocampus-Ouest, INRA, Université d'Angers, SFR4207 QuaSaV, 49071, Beaucouzé, France
| | - P Jones
- Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee, USA
| | - A Préveaux
- IRHS, Agrocampus-Ouest, INRA, Université d'Angers, SFR4207 QuaSaV, 49071, Beaucouzé, France
| | - M Briand
- IRHS, Agrocampus-Ouest, INRA, Université d'Angers, SFR4207 QuaSaV, 49071, Beaucouzé, France
| | - A Roulet
- INRA, US 1426, GeT-PlaGe, Genotoul, Castanet-Tolosan, France
| | - O Bouchez
- INRA, US 1426, GeT-PlaGe, Genotoul, Castanet-Tolosan, France
| | - D Jacobson
- Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee, USA
| | - M Barret
- IRHS, Agrocampus-Ouest, INRA, Université d'Angers, SFR4207 QuaSaV, 49071, Beaucouzé, France
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13
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Gully K, Pelletier S, Guillou MC, Ferrand M, Aligon S, Pokotylo I, Perrin A, Vergne E, Fagard M, Ruelland E, Grappin P, Bucher E, Renou JP, Aubourg S. The SCOOP12 peptide regulates defense response and root elongation in Arabidopsis thaliana. JOURNAL OF EXPERIMENTAL BOTANY 2019; 70:1349-1365. [PMID: 30715439 PMCID: PMC6382344 DOI: 10.1093/jxb/ery454] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2018] [Accepted: 12/12/2018] [Indexed: 05/20/2023]
Abstract
Small secreted peptides are important players in plant development and stress response. Using a targeted in silico approach, we identified a family of 14 Arabidopsis genes encoding precursors of serine-rich endogenous peptides (PROSCOOP). Transcriptomic analyses revealed that one member of this family, PROSCOOP12, is involved in processes linked to biotic and oxidative stress as well as root growth. Plants defective in this gene were less susceptible to Erwinia amylovora infection and showed an enhanced root growth phenotype. In PROSCOOP12 we identified a conserved motif potentially coding for a small secreted peptide. Exogenous application of synthetic SCOOP12 peptide induces various defense responses in Arabidopsis. Our findings show that SCOOP12 has numerous properties of phytocytokines, activates the phospholipid signaling pathway, regulates reactive oxygen species response, and is perceived in a BAK1 co-receptor-dependent manner.
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Affiliation(s)
- Kay Gully
- IRHS (Institut de Recherche en Horticulture et Semences), UMR 1345, INRA, Agrocampus-Ouest, Université d’Angers, QuaSaV, Beaucouzé, France
| | - Sandra Pelletier
- IRHS (Institut de Recherche en Horticulture et Semences), UMR 1345, INRA, Agrocampus-Ouest, Université d’Angers, QuaSaV, Beaucouzé, France
| | - Marie-Charlotte Guillou
- IRHS (Institut de Recherche en Horticulture et Semences), UMR 1345, INRA, Agrocampus-Ouest, Université d’Angers, QuaSaV, Beaucouzé, France
| | - Marina Ferrand
- Institut Jean-Pierre Bourgin, INRA, AgroParisTech, CNRS, Université Paris-Saclay, Versailles, France
| | - Sophie Aligon
- IRHS (Institut de Recherche en Horticulture et Semences), UMR 1345, INRA, Agrocampus-Ouest, Université d’Angers, QuaSaV, Beaucouzé, France
| | - Igor Pokotylo
- iEES-Paris (Interaction Plantes-Environnement Institut d’Ecologie et des Sciences de l’Environnement de Paris), UMR CNRS 7618, Université Paris Est Créteil, 61 avenue du général de Gaulle, Créteil, France
| | - Adrien Perrin
- IRHS (Institut de Recherche en Horticulture et Semences), UMR 1345, INRA, Agrocampus-Ouest, Université d’Angers, QuaSaV, Beaucouzé, France
| | - Emilie Vergne
- IRHS (Institut de Recherche en Horticulture et Semences), UMR 1345, INRA, Agrocampus-Ouest, Université d’Angers, QuaSaV, Beaucouzé, France
| | - Mathilde Fagard
- Institut Jean-Pierre Bourgin, INRA, AgroParisTech, CNRS, Université Paris-Saclay, Versailles, France
| | - Eric Ruelland
- iEES-Paris (Interaction Plantes-Environnement Institut d’Ecologie et des Sciences de l’Environnement de Paris), UMR CNRS 7618, Université Paris Est Créteil, 61 avenue du général de Gaulle, Créteil, France
| | - Philippe Grappin
- IRHS (Institut de Recherche en Horticulture et Semences), UMR 1345, INRA, Agrocampus-Ouest, Université d’Angers, QuaSaV, Beaucouzé, France
| | - Etienne Bucher
- IRHS (Institut de Recherche en Horticulture et Semences), UMR 1345, INRA, Agrocampus-Ouest, Université d’Angers, QuaSaV, Beaucouzé, France
| | - Jean-Pierre Renou
- IRHS (Institut de Recherche en Horticulture et Semences), UMR 1345, INRA, Agrocampus-Ouest, Université d’Angers, QuaSaV, Beaucouzé, France
- Correspondence: or
| | - Sébastien Aubourg
- IRHS (Institut de Recherche en Horticulture et Semences), UMR 1345, INRA, Agrocampus-Ouest, Université d’Angers, QuaSaV, Beaucouzé, France
- Correspondence: or
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14
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Genome Sequence of the Necrotrophic Plant Pathogen Alternaria brassicicola Abra43. GENOME ANNOUNCEMENTS 2018; 6:6/6/e01559-17. [PMID: 29439047 PMCID: PMC5805885 DOI: 10.1128/genomea.01559-17] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
Abstract
Alternaria brassicicola causes dark spot (or black spot) disease, which is one of the most common and destructive fungal diseases of Brassicaceae spp. worldwide. Here, we report the draft genome sequence of strain Abra43. The assembly comprises 29 scaffolds, with an N50 value of 2.1 Mb. The assembled genome was 31,036,461 bp in length, with a G+C content of 50.85%.
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15
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Rezki S, Campion C, Iacomi-Vasilescu B, Preveaux A, Toualbia Y, Bonneau S, Briand M, Laurent E, Hunault G, Simoneau P, Jacques MA, Barret M. Differences in stability of seed-associated microbial assemblages in response to invasion by phytopathogenic microorganisms. PeerJ 2016; 4:e1923. [PMID: 27077013 PMCID: PMC4830237 DOI: 10.7717/peerj.1923] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2016] [Accepted: 03/21/2016] [Indexed: 11/20/2022] Open
Abstract
Seeds are involved in the vertical transmission of microorganisms from one plant generation to another and consequently act as reservoirs for the plant microbiota. However, little is known about the structure of seed-associated microbial assemblages and the regulators of assemblage structure. In this work, we have assessed the response of seed-associated microbial assemblages of Raphanus sativus to invading phytopathogenic agents, the bacterial strain Xanthomonas campestris pv. campestris (Xcc) 8004 and the fungal strain Alternaria brassicicola Abra43. According to the indicators of bacterial (16S rRNA gene and gyrB sequences) and fungal (ITS1) diversity employed in this study, seed transmission of the bacterial strain Xcc 8004 did not change the overall composition of resident microbial assemblages. In contrast seed transmission of Abra43 strongly modified the richness and structure of fungal assemblages without affecting bacterial assemblages. The sensitivity of seed-associated fungal assemblage to Abra43 is mostly related to changes in relative abundance of closely related fungal species that belong to the Alternaria genus. Variation in stability of the seed microbiota in response to Xcc and Abra43 invasions could be explained by differences in seed transmission pathways employed by these micro-organisms, which ultimately results in divergence in spatio-temporal colonization of the seed habitat.
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Affiliation(s)
- Samir Rezki
- Institut de Recherche en Horticulture et Semences, Institut National de la Recherche Agronomique , Beaucouzé , France
| | - Claire Campion
- Institut de Recherche en Horticulture et Semences, Université d'Angers , Beaucouzé , France
| | | | - Anne Preveaux
- Institut de Recherche en Horticulture et Semences, Institut National de la Recherche Agronomique , Beaucouzé , France
| | - Youness Toualbia
- Institut de Recherche en Horticulture et Semences, Université d'Angers , Beaucouzé , France
| | - Sophie Bonneau
- Institut de Recherche en Horticulture et Semences, Institut National de la Recherche Agronomique , Beaucouzé , France
| | - Martial Briand
- Institut de Recherche en Horticulture et Semences, Institut National de la Recherche Agronomique , Beaucouzé , France
| | - Emmanuelle Laurent
- Federation Nationale des Agriculteurs Multiplicateurs de Semences , Brain sur l'Authion , France
| | - Gilles Hunault
- Laboratoire d'Hémodynamique, Interaction Fibrose et Invasivité tumorale Hépatique, Université d'Angers , Angers , France
| | - Philippe Simoneau
- Institut de Recherche en Horticulture et Semences, Université d'Angers , Beaucouzé , France
| | - Marie-Agnès Jacques
- Institut de Recherche en Horticulture et Semences, Institut National de la Recherche Agronomique , Beaucouzé , France
| | - Matthieu Barret
- Institut de Recherche en Horticulture et Semences, Institut National de la Recherche Agronomique , Beaucouzé , France
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16
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Klaedtke S, Jacques MA, Raggi L, Préveaux A, Bonneau S, Negri V, Chable V, Barret M. Terroir is a key driver of seed-associated microbial assemblages. Environ Microbiol 2015; 18:1792-804. [PMID: 26171841 DOI: 10.1111/1462-2920.12977] [Citation(s) in RCA: 67] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2015] [Accepted: 07/01/2015] [Indexed: 12/20/2022]
Abstract
Seeds have evolved in association with diverse microbial assemblages that may influence plant growth and health. However, little is known about the composition of seed-associated microbial assemblages and the ecological processes shaping their structures. In this work, we monitored the relative influence of the host genotypes and terroir on the structure of the seed microbiota through metabarcoding analysis of different microbial assemblages associated to five different bean cultivars harvested in two distinct farms. Overall, few bacterial and fungal operational taxonomic units (OTUs) were conserved across all seed samples. The lack of shared OTUs between samples is explained by a significant effect of the farm site on the structure of microbial assemblage, which explained 12.2% and 39.7% of variance in bacterial and fungal diversity across samples. This site-specific effect is reflected by the significant enrichment of 70 OTUs in Brittany and 88 OTUs in Luxembourg that lead to differences in co-occurrence patterns. In contrast, variance in microbial assemblage structure was not explained by host genotype. Altogether, these results suggest that seed-associated microbial assemblage is determined by niche-based processes and that the terroir is a key driver of these selective forces.
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Affiliation(s)
| | - Marie-Agnès Jacques
- UMR1345 Institut de Recherches en Horticulture et Semences, INRA, SFR4207 QUASAV, F-49071, Beaucouzé, France
| | - Lorenzo Raggi
- Dipartimento di Scienze Agrarie, Alimentari e Ambientali, Università degli Studi di Perugia, Borgo XX Giugno 74, 06121, Perugia, Italy
| | - Anne Préveaux
- UMR1345 Institut de Recherches en Horticulture et Semences, INRA, SFR4207 QUASAV, F-49071, Beaucouzé, France
| | - Sophie Bonneau
- UMR1345 Institut de Recherches en Horticulture et Semences, INRA, SFR4207 QUASAV, F-49071, Beaucouzé, France
| | - Valeria Negri
- Dipartimento di Scienze Agrarie, Alimentari e Ambientali, Università degli Studi di Perugia, Borgo XX Giugno 74, 06121, Perugia, Italy
| | - Véronique Chable
- UR980, INRA SAD, 65 Rue de St. Brieuc, CS 84215, 35042, Rennes, France
| | - Matthieu Barret
- UMR1345 Institut de Recherches en Horticulture et Semences, INRA, SFR4207 QUASAV, F-49071, Beaucouzé, France
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17
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Abstract
The gateway to the secretory pathway is the endoplasmic reticulum (ER), an organelle that is responsible for the accurate folding, post-translational modification and final assembly of up to a third of the cellular proteome. When secretion levels are high, errors in protein biogenesis can lead to the accumulation of abnormally folded proteins, which threaten ER homeostasis. The unfolded protein response (UPR) is an adaptive signaling pathway that counters a buildup in misfolded and unfolded proteins by increasing the expression of genes that support ER protein folding capacity. Fungi, like other eukaryotic cells that are specialized for secretion, rely upon the UPR to buffer ER stress caused by fluctuations in secretory demand. However, emerging evidence is also implicating the UPR as a central regulator of fungal pathogenesis. In this review, we discuss how diverse fungal pathogens have adapted ER stress response pathways to support the expression of virulence-related traits that are necessary in the host environment.
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Affiliation(s)
- Karthik Krishnan
- Department of Pathology & Laboratory Medicine, University of Cincinnati, Cincinnati, OH 45267-0529
| | - David S Askew
- Department of Pathology & Laboratory Medicine, University of Cincinnati, Cincinnati, OH 45267-0529
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18
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Guillemette T, Calmes B, Simoneau P. Impact of the UPR on the virulence of the plant fungal pathogen A. brassicicola. Virulence 2014; 5:357-64. [PMID: 24189567 PMCID: PMC3956514 DOI: 10.4161/viru.26772] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2013] [Revised: 10/10/2013] [Accepted: 10/10/2013] [Indexed: 11/19/2022] Open
Abstract
The fungal genus Alternaria contains many destructive plant pathogens, including Alternaria brassicicola, which causes black spot disease on a wide range of Brassicaceae plants and which is routinely used as a model necrotrophic pathogen in studies with Arabidopsis thaliana. During host infection, many fungal proteins that are critical for disease progression are processed in the endoplasmic reticulum (ER)/Golgi system and secreted in planta. The unfolded protein response (UPR) is an essential part of ER protein quality control that ensures efficient maturation of secreted and membrane-bound proteins in eukaryotes. This review highlights the importance of the UPR signaling pathway with respect to the ability of A. brassicicola to efficiently accomplish key steps of its pathogenic life cycle. Understanding the pathogenicity mechanisms that fungi uses during infection is crucial for the development of new antifungal therapies. Therefore the UPR pathway has emerged as a promising drug target for plant disease control.
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Affiliation(s)
- Thomas Guillemette
- Université d’Angers; UMR 1345 IRHS; SFR QUASAV; Angers, France
- INRA; UMR 1345 IRHS; Angers, France
- Agrocampus-Ouest; UMR 1345 IRHS; Angers, France
| | - Benoit Calmes
- Université d’Angers; UMR 1345 IRHS; SFR QUASAV; Angers, France
- INRA; UMR 1345 IRHS; Angers, France
- Agrocampus-Ouest; UMR 1345 IRHS; Angers, France
| | - Philippe Simoneau
- Université d’Angers; UMR 1345 IRHS; SFR QUASAV; Angers, France
- INRA; UMR 1345 IRHS; Angers, France
- Agrocampus-Ouest; UMR 1345 IRHS; Angers, France
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19
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Gupta S, Bhar A, Das S. Understanding the molecular defence responses of host during chickpea-Fusarium interplay: where do we stand? FUNCTIONAL PLANT BIOLOGY : FPB 2013; 40:1285-1297. [PMID: 32481195 DOI: 10.1071/fp13063] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2013] [Accepted: 07/04/2013] [Indexed: 06/11/2023]
Abstract
Fusarium oxysporum is known to cause vascular wilt and root rot of many important plants. Although extensive studies have been reported for the model plant Arabidopsis thaliana (L.) Heynh., the question of whether those experimental interpretations are extendable to other crop species requires experimentation. Chickpea is the most important crop legume of Indian subcontinent and ranks third in the world list of important legumes. However, productivity of this crop is severely curtailed by vascular wilt caused by Fusarium oxysporum f. sp. ciceri. Based on earlier reports, the present review discusses about the external manifestations of the disease, in planta fungal progression and establishment, and the molecular responses of chickpea that occur during Fusarium oxysporum f. sp. ciceri Race 1(Foc1) interaction. Foc1, known to enter the roots through the breaches of tap root, colonise the xylem vessels and block upward translocation of essential solutes causing wilt in compatible hosts. In contrast, pathogen invasion is readily perceived by the resistant host, which activates defence signalling cascades that are directed towards protecting its primary metabolism from the harmful consequences of pathogenic mayhem. Hence, understanding the dynamic complexities of chickpea-Foc1 interplay is prerequisite to providing sustainable solutions in wilt management programs.
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Affiliation(s)
- Sumanti Gupta
- Division of Plant Biology, Bose Institute, Centenary Campus, P1/12, CIT Scheme, VII-M, Kankurgachi, Kolkata-700054, West Bengal, India
| | - Anirban Bhar
- Division of Plant Biology, Bose Institute, Centenary Campus, P1/12, CIT Scheme, VII-M, Kankurgachi, Kolkata-700054, West Bengal, India
| | - Sampa Das
- Division of Plant Biology, Bose Institute, Centenary Campus, P1/12, CIT Scheme, VII-M, Kankurgachi, Kolkata-700054, West Bengal, India
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20
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Pochon S, Simoneau P, Pigné S, Balidas S, Bataillé-Simoneau N, Campion C, Jaspard E, Calmes B, Hamon B, Berruyer R, Juchaux M, Guillemette T. Dehydrin-like proteins in the necrotrophic fungus Alternaria brassicicola have a role in plant pathogenesis and stress response. PLoS One 2013; 8:e75143. [PMID: 24098369 PMCID: PMC3788798 DOI: 10.1371/journal.pone.0075143] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2013] [Accepted: 08/09/2013] [Indexed: 11/18/2022] Open
Abstract
In this study, the roles of fungal dehydrin-like proteins in pathogenicity and protection against environmental stresses were investigated in the necrotrophic seed-borne fungus Alternaria brassicicola. Three proteins (called AbDhn1, AbDhn2 and AbDhn3), harbouring the asparagine-proline-arginine (DPR) signature pattern and sharing the characteristic features of fungal dehydrin-like proteins, were identified in the A. brassicicola genome. The expression of these genes was induced in response to various stresses and found to be regulated by the AbHog1 mitogen-activated protein kinase (MAPK) pathway. A knock-out approach showed that dehydrin-like proteins have an impact mainly on oxidative stress tolerance and on conidial survival upon exposure to high and freezing temperatures. The subcellular localization revealed that AbDhn1 and AbDhn2 were associated with peroxisomes, which is consistent with a possible perturbation of protective mechanisms to counteract oxidative stress and maintain the redox balance in AbDhn mutants. Finally, we show that the double deletion mutant ΔΔabdhn1-abdhn2 was highly compromised in its pathogenicity. By comparison to the wild-type, this mutant exhibited lower aggressiveness on B. oleracea leaves and a reduced capacity to be transmitted to Arabidopsis seeds via siliques. The double mutant was also affected with respect to conidiation, another crucial step in the epidemiology of the disease.
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Affiliation(s)
- Stéphanie Pochon
- Université d’Angers, UMR 1345 IRHS, SFR QUASAV, Angers, France
- INRA, UMR 1345 IRHS, Angers, France
- Agrocampus-Ouest, UMR 1345 IRHS, Angers, France
| | - Philippe Simoneau
- Université d’Angers, UMR 1345 IRHS, SFR QUASAV, Angers, France
- INRA, UMR 1345 IRHS, Angers, France
- Agrocampus-Ouest, UMR 1345 IRHS, Angers, France
| | - Sandrine Pigné
- Université d’Angers, UMR 1345 IRHS, SFR QUASAV, Angers, France
- INRA, UMR 1345 IRHS, Angers, France
- Agrocampus-Ouest, UMR 1345 IRHS, Angers, France
| | - Samuel Balidas
- Université d’Angers, UMR 1345 IRHS, SFR QUASAV, Angers, France
- INRA, UMR 1345 IRHS, Angers, France
- Agrocampus-Ouest, UMR 1345 IRHS, Angers, France
| | - Nelly Bataillé-Simoneau
- Université d’Angers, UMR 1345 IRHS, SFR QUASAV, Angers, France
- INRA, UMR 1345 IRHS, Angers, France
- Agrocampus-Ouest, UMR 1345 IRHS, Angers, France
| | - Claire Campion
- Université d’Angers, UMR 1345 IRHS, SFR QUASAV, Angers, France
- INRA, UMR 1345 IRHS, Angers, France
- Agrocampus-Ouest, UMR 1345 IRHS, Angers, France
| | - Emmanuel Jaspard
- Université d’Angers, UMR 1345 IRHS, SFR QUASAV, Angers, France
- INRA, UMR 1345 IRHS, Angers, France
- Agrocampus-Ouest, UMR 1345 IRHS, Angers, France
| | - Benoît Calmes
- Université d’Angers, UMR 1345 IRHS, SFR QUASAV, Angers, France
- INRA, UMR 1345 IRHS, Angers, France
- Agrocampus-Ouest, UMR 1345 IRHS, Angers, France
| | - Bruno Hamon
- Université d’Angers, UMR 1345 IRHS, SFR QUASAV, Angers, France
- INRA, UMR 1345 IRHS, Angers, France
- Agrocampus-Ouest, UMR 1345 IRHS, Angers, France
| | - Romain Berruyer
- Université d’Angers, UMR 1345 IRHS, SFR QUASAV, Angers, France
- INRA, UMR 1345 IRHS, Angers, France
- Agrocampus-Ouest, UMR 1345 IRHS, Angers, France
| | | | - Thomas Guillemette
- Université d’Angers, UMR 1345 IRHS, SFR QUASAV, Angers, France
- INRA, UMR 1345 IRHS, Angers, France
- Agrocampus-Ouest, UMR 1345 IRHS, Angers, France
- * E-mail:
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Calmes B, Guillemette T, Teyssier L, Siegler B, Pigné S, Landreau A, Iacomi B, Lemoine R, Richomme P, Simoneau P. Role of mannitol metabolism in the pathogenicity of the necrotrophic fungus Alternaria brassicicola. FRONTIERS IN PLANT SCIENCE 2013; 4:131. [PMID: 23717316 PMCID: PMC3652318 DOI: 10.3389/fpls.2013.00131] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2013] [Accepted: 04/20/2013] [Indexed: 05/29/2023]
Abstract
In this study, the physiological functions of fungal mannitol metabolism in the pathogenicity and protection against environmental stresses were investigated in the necrotrophic fungus Alternaria brassicicola. Mannitol metabolism was examined during infection of Brassica oleracea leaves by sequential HPLC quantification of the major soluble carbohydrates and expression analysis of genes encoding two proteins of mannitol metabolism, i.e., a mannitol dehydrogenase (AbMdh), and a mannitol-1-phosphate dehydrogenase (AbMpd). Knockout mutants deficient for AbMdh or AbMpd and a double mutant lacking both enzyme activities were constructed. Their capacity to cope with various oxidative and drought stresses and their pathogenic behavior were evaluated. Metabolic and gene expression profiling indicated an increase in mannitol production during plant infection. Depending on the mutants, distinct pathogenic processes, such as leaf and silique colonization, sporulation, survival on seeds, were impaired by comparison to the wild-type. This pathogenic alteration could be partly explained by the differential susceptibilities of mutants to oxidative and drought stresses. These results highlight the importance of mannitol metabolism with respect to the ability of A. brassicicola to efficiently accomplish key steps of its pathogenic life cycle.
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Affiliation(s)
- Benoit Calmes
- SFR 4207 QUASAV, UMR 1345 IRHS, Université d'AngersAngers Cedex, France
- SFR 4207 QUASAV, INRA, UMR 1345 IRHSAngers Cedex, France
- SFR 4207 QUASAV, Agrocampus-Ouest, UMR 1345 IRHSAngers Cedex, France
| | - Thomas Guillemette
- SFR 4207 QUASAV, UMR 1345 IRHS, Université d'AngersAngers Cedex, France
- SFR 4207 QUASAV, INRA, UMR 1345 IRHSAngers Cedex, France
- SFR 4207 QUASAV, Agrocampus-Ouest, UMR 1345 IRHSAngers Cedex, France
| | - Lény Teyssier
- SFR 4207 QUASAV, UMR 1345 IRHS, Université d'AngersAngers Cedex, France
- SFR 4207 QUASAV, INRA, UMR 1345 IRHSAngers Cedex, France
- SFR 4207 QUASAV, Agrocampus-Ouest, UMR 1345 IRHSAngers Cedex, France
| | - Benjamin Siegler
- Plateforme d'Ingénierie et Analyses Moléculaires, Université d'AngersAngers Cedex, France
| | - Sandrine Pigné
- SFR 4207 QUASAV, UMR 1345 IRHS, Université d'AngersAngers Cedex, France
- SFR 4207 QUASAV, INRA, UMR 1345 IRHSAngers Cedex, France
- SFR 4207 QUASAV, Agrocampus-Ouest, UMR 1345 IRHSAngers Cedex, France
| | - Anne Landreau
- SONAS EA 921, SFR 4207, QUASAV UFR des Sciences Pharmaceutiques et d'Ingénierie de la Santé, Université d'AngersAngers Cedex, France
| | | | - Rémi Lemoine
- Ecologie, Biologie des Interactions, UMR 7267 CNRS/Université de PoitiersPoitiers, France
| | - Pascal Richomme
- SONAS EA 921, SFR 4207, QUASAV UFR des Sciences Pharmaceutiques et d'Ingénierie de la Santé, Université d'AngersAngers Cedex, France
| | - Philippe Simoneau
- SFR 4207 QUASAV, UMR 1345 IRHS, Université d'AngersAngers Cedex, France
- SFR 4207 QUASAV, INRA, UMR 1345 IRHSAngers Cedex, France
- SFR 4207 QUASAV, Agrocampus-Ouest, UMR 1345 IRHSAngers Cedex, France
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