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Christian N, Perlin MH. Plant-endophyte communication: Scaling from molecular mechanisms to ecological outcomes. Mycologia 2024; 116:227-250. [PMID: 38380970 DOI: 10.1080/00275514.2023.2299658] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Accepted: 12/22/2023] [Indexed: 02/22/2024]
Abstract
Diverse communities of fungal endophytes reside in plant tissues, where they affect and are affected by plant physiology and ecology. For these intimate interactions to form and persist, endophytes and their host plants engage in intricate systems of communication. The conversation between fungal endophytes and plant hosts ultimately dictates endophyte community composition and function and has cascading effects on plant health and plant interactions. In this review, we synthesize our current knowledge on the mechanisms and strategies of communication used by endophytic fungi and their plant hosts. We discuss the molecular mechanisms of communication that lead to organ specificity of endophytic communities and distinguish endophytes, pathogens, and saprotrophs. We conclude by offering emerging perspectives on the relevance of plant-endophyte communication to microbial community ecology and plant health and function.
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Affiliation(s)
- Natalie Christian
- Department of Biology, University of Louisville, Louisville, Kentucky 40292
| | - Michael H Perlin
- Department of Biology, University of Louisville, Louisville, Kentucky 40292
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2
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Maximiano M, Santos L, Santos C, Aragão F, Dias S, Franco O, Mehta A. Host induced gene silencing of Sclerotinia sclerotiorum effector genes for the control of white mold. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2022. [DOI: 10.1016/j.bcab.2022.102302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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3
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Shao D, Smith DL, Kabbage M, Roth MG. Effectors of Plant Necrotrophic Fungi. FRONTIERS IN PLANT SCIENCE 2021; 12:687713. [PMID: 34149788 PMCID: PMC8213389 DOI: 10.3389/fpls.2021.687713] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Accepted: 05/03/2021] [Indexed: 05/20/2023]
Abstract
Plant diseases caused by necrotrophic fungal pathogens result in large economic losses in field crop production worldwide. Effectors are important players of plant-pathogen interaction and deployed by pathogens to facilitate plant colonization and nutrient acquisition. Compared to biotrophic and hemibiotrophic fungal pathogens, effector biology is poorly understood for necrotrophic fungal pathogens. Recent bioinformatics advances have accelerated the prediction and discovery of effectors from necrotrophic fungi, and their functional context is currently being clarified. In this review we examine effectors utilized by necrotrophic fungi and hemibiotrophic fungi in the latter stages of disease development, including plant cell death manipulation. We define "effectors" as secreted proteins and other molecules that affect plant physiology in ways that contribute to disease establishment and progression. Studying and understanding the mechanisms of necrotrophic effectors is critical for identifying avenues of genetic intervention that could lead to improved resistance to these pathogens in plants.
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Affiliation(s)
| | | | | | - Mitchell G. Roth
- Department of Plant Pathology, University of Wisconsin – Madison, Madison, WI, United States
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4
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Maximiano MR, Miranda VJ, de Barros EG, Dias SC. Validation of an in vitro system to trigger changes in the gene expression of effectors of Sclerotinia sclerotiorum. J Appl Microbiol 2021; 131:885-897. [PMID: 33331046 DOI: 10.1111/jam.14973] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 12/11/2020] [Accepted: 12/12/2020] [Indexed: 11/27/2022]
Abstract
AIMS Sclerotinia sclerotiorum, the causal agent of white mold, can infect several host species, including economically important crops. In this study, we propose and validate a new in vitro system able to mimic the conditions of interaction with the host and promote the induction of S. sclerotiorum effectors. METHODS AND RESULTS For culture media production, we selected three plant species, common bean (Phaseolus vulgaris L, cv. Requinte.), maize (Zea mays, cv. BRS1030) and beggarticks (Bidens pilosa). To validate this system as an in vitro inducer of effectors, the qRT-PCR technique was used to investigate the expression profile of some S. sclerotiorum effector genes in each growth medium at different times after inoculation. CONCLUSION The results obtained in this study provide a validation of a new method to study S. sclerotiorum during mimetic interaction with different hosts. Although leaf extract does not fully represent the plant environment, the presence of plant components in the culture medium seems to induce effector genes, mimicking in planta conditions. The use of MEVM is simpler than in planta growth, bypasses problems such as the amount of mycelium produced, as well as contamination of host cells during transcriptomic and proteomic analyses. SIGNIFICANCE AND IMPACT OF THE STUDY We have devised MEVM media as a model mimicking the interaction of S. sclerotiorum and its hosts and used it to evaluate in vitro expression of effectors normally expressed only in planta.
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Affiliation(s)
- M R Maximiano
- Centro de Análises Proteômicas e Bioquímicas, Programa de Pós-Graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, Brasília, Distrito Federal, Brazil
| | - V J Miranda
- Centro de Análises Proteômicas e Bioquímicas, Programa de Pós-Graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, Brasília, Distrito Federal, Brazil
| | - E G de Barros
- Centro de Análises Proteômicas e Bioquímicas, Programa de Pós-Graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, Brasília, Distrito Federal, Brazil
| | - S C Dias
- Centro de Análises Proteômicas e Bioquímicas, Programa de Pós-Graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, Brasília, Distrito Federal, Brazil
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5
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Ashtari Mahini R, Kumar A, Elias EM, Fiedler JD, Porter LD, McPhee KE. Analysis and Identification of QTL for Resistance to Sclerotinia sclerotiorum in Pea ( Pisum sativum L.). Front Genet 2020; 11:587968. [PMID: 33329732 PMCID: PMC7710873 DOI: 10.3389/fgene.2020.587968] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Accepted: 10/23/2020] [Indexed: 11/13/2022] Open
Abstract
White mold caused by Sclerotinia sclerotiorum is an important constraint to field pea (Pisum sativum L.) production worldwide. To transfer white mold resistance into an adapted background, and study the genetics of the disease, two recombinant inbred line (RIL) populations (PRIL17 and PRIL19) were developed by crossing two partially resistant plant introductions with two susceptible pea cultivars. PRIL17 (Lifter × PI240515), and PRIL19 (PI169603 × Medora) were evaluated for resistance to white mold by measuring lesion expansion inhibition (LEI) and nodal transmission inhibition (NTI) at 3, 7, and 14 days post inoculation (dpi) under controlled environmental conditions. Lesion expansion inhibition percentage (LEIP), survival rate (SR), and area under disease progress curves (AUDPC) were also calculated accordingly. Because of a positive correlation between LEI and NTI with height, short and long internode individuals of each population were analyzed separately to avoid any confounding effect of height to pathogen response. A total of 22 short genotypes demonstrated partial resistance based on at least two Porter's resistance criteria. Only two pea genotypes with partial resistance to white mold (PRIL19-18 and PRIL19-124) had both semi-leafless (afila) and short internode traits. Both the RIL populations were genotyped using genotyping by sequencing (GBS). For PRIL17 and PRIL19, genetic maps were constructed from a total of 1,967 and 1,196 single nucleotide polymorphism (SNP) and spanned over 1,494 cM and 1,415 cM representing seven and nine linkage groups, respectively. A consensus map constructed using data from both populations, had 1,486 unique SNPs over 2,461 cM belonging to seven linkage groups. Inclusive composite interval mapping (ICIM) identified thirteen quantitative trait loci (QTL) associated with white mold resistance traits in both populations. Three of them were co-located with height genes (a morphological trait that reduces infection risk and acts as disease avoidance) and the other ten QTL were associated with two forms of physiological resistance (seven for LEI and three for NTI) with LOD and r2 ranging from 3.0 to 28.5 and 5.1 to 64.3, respectively. The development of resistance lines, genetic dissection and identification of markers associated will help accelerate breeding efforts for white mold resistance using molecular breeding approaches.
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Affiliation(s)
- Rahil Ashtari Mahini
- Plant Science Department, North Dakota State University, Fargo, ND, United States
| | - Ajay Kumar
- Plant Science Department, North Dakota State University, Fargo, ND, United States
| | - Elias M. Elias
- Plant Science Department, North Dakota State University, Fargo, ND, United States
| | - Jason D. Fiedler
- USDA-ARS, Cereal Crops Research Unit, Edward T. Schafer Agricultural Research Center, Fargo, ND, United States
| | - Lyndon D. Porter
- USDA-ARS, Grain Legume Genetics and Physiology Research Unit, Prosser, WA, United States
| | - Kevin E. McPhee
- Plant Sciences and Plant Pathology Department, Montana State University, Bozeman, MT, United States
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6
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Pradhan A, Ghosh S, Sahoo D, Jha G. Fungal effectors, the double edge sword of phytopathogens. Curr Genet 2020; 67:27-40. [PMID: 33146780 DOI: 10.1007/s00294-020-01118-3] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Revised: 09/24/2020] [Accepted: 10/13/2020] [Indexed: 12/17/2022]
Abstract
Phyto-pathogenic fungi can cause huge damage to crop production. During millions of years of coexistence, fungi have evolved diverse life-style to obtain nutrients from the host and to colonize upon them. They deploy various proteinaceous as well as non-proteinaceous secreted molecules commonly referred as effectors to sabotage host machinery during the infection process. The effectors are important virulence determinants of pathogenic fungi and play important role in successful pathogenesis, predominantly by avoiding host-surveillance system. However, besides being important for pathogenesis, the fungal effectors end-up being recognized by the resistant cultivars of the host, which mount a strong immune response to ward-off pathogens. Various recent studies involving different pathosystem have revealed the virulence/avirulence functions of fungal effectors and their involvement in governing the outcome of host-pathogen interactions. However, the effectors and their cognate resistance gene in the host remain elusive for several economically important fungal pathogens. In this review, using examples from some of the biotrophic, hemi-biotrophic and necrotrophic pathogens, we elaborate the double-edged functions of fungal effectors. We emphasize that knowledge of effector functions can be helpful in effective management of fungal diseases in crop plants.
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Affiliation(s)
- Amrita Pradhan
- Plant Microbe Interactions Laboratory, National Institute of Plant Genome Research, Aruna Asaf Ali Marg, New Delhi, 110067, India
| | - Srayan Ghosh
- Plant Microbe Interactions Laboratory, National Institute of Plant Genome Research, Aruna Asaf Ali Marg, New Delhi, 110067, India
| | - Debashis Sahoo
- Plant Microbe Interactions Laboratory, National Institute of Plant Genome Research, Aruna Asaf Ali Marg, New Delhi, 110067, India
| | - Gopaljee Jha
- Plant Microbe Interactions Laboratory, National Institute of Plant Genome Research, Aruna Asaf Ali Marg, New Delhi, 110067, India.
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7
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Ruiz-Lara A, Fierro F, Carrasco U, Oria J, Tomasini A. Proteomic analysis of the response of Rhizopus oryzae ENHE to pentachlorophenol: Understanding the mechanisms for tolerance and degradation of this toxic compound. Process Biochem 2020. [DOI: 10.1016/j.procbio.2020.02.016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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8
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Santos C, Duarte S, Tedesco S, Fevereiro P, Costa RL. Expression Profiling of Castanea Genes during Resistant and Susceptible Interactions with the Oomycete Pathogen Phytophthora cinnamomi Reveal Possible Mechanisms of Immunity. FRONTIERS IN PLANT SCIENCE 2017; 8:515. [PMID: 28443110 PMCID: PMC5387079 DOI: 10.3389/fpls.2017.00515] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2016] [Accepted: 03/23/2017] [Indexed: 05/28/2023]
Abstract
The most dangerous pathogen affecting the production of chestnuts is Phytophthora cinnamomi a hemibiotrophic that causes root rot, also known as ink disease. Little information has been acquired in chestnut on the molecular defense strategies against this pathogen. The expression of eight candidate genes potentially involved in the defense to P. cinnamomi was quantified by digital PCR in Castanea genotypes showing different susceptibility to the pathogen. Seven of the eight candidate genes displayed differentially expressed levels depending on genotype and time-point after inoculation. Cast_Gnk2-like revealed to be the most expressed gene across all experiments and the one that best discriminates between susceptible and resistant genotypes. Our data suggest that the pre-formed defenses are crucial for the resistance of C. crenata to P. cinnamomi. A lower and delayed expression of the eight studied genes was found in the susceptible Castanea sativa, which may be related with the establishment and spread of the disease in this species. A working model integrating the obtained results is presented.
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Affiliation(s)
- Carmen Santos
- Molecular Biology Lab, Instituto Nacional de Investigação Agrária e Veterinária, I.P.Oeiras, Portugal
- Plant Cell Biotechnology Lab, Instituto de Tecnologia Química e Biológica António Xavier (Green-it Unit), Universidade Nova de LisboaOeiras, Portugal
| | - Sofia Duarte
- Molecular Biology Lab, Instituto Nacional de Investigação Agrária e Veterinária, I.P.Oeiras, Portugal
| | - Sara Tedesco
- Molecular Biology Lab, Instituto Nacional de Investigação Agrária e Veterinária, I.P.Oeiras, Portugal
| | - Pedro Fevereiro
- Plant Cell Biotechnology Lab, Instituto de Tecnologia Química e Biológica António Xavier (Green-it Unit), Universidade Nova de LisboaOeiras, Portugal
- Departamento Biologia Vegetal, Faculdade de Ciências da Universidade de LisboaCampo Grande, Portugal
| | - Rita L. Costa
- Molecular Biology Lab, Instituto Nacional de Investigação Agrária e Veterinária, I.P.Oeiras, Portugal
- Centro de Estudos Florestais, Instituto Superior de Agronomia, Universidade de Lisboa - Tapada da AjudaLisboa, Portugal
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9
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Derbyshire M, Denton-Giles M, Hegedus D, Seifbarghy S, Rollins J, van Kan J, Seidl MF, Faino L, Mbengue M, Navaud O, Raffaele S, Hammond-Kosack K, Heard S, Oliver R. The complete genome sequence of the phytopathogenic fungus Sclerotinia sclerotiorum reveals insights into the genome architecture of broad host range pathogens. Genome Biol Evol 2017; 9:593-618. [PMID: 28204478 PMCID: PMC5381539 DOI: 10.1093/gbe/evx030] [Citation(s) in RCA: 111] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2016] [Revised: 01/16/2017] [Accepted: 02/08/2017] [Indexed: 12/19/2022] Open
Abstract
Sclerotinia sclerotiorum is a phytopathogenic fungus with over 400 hosts including numerous economically important cultivated species. This contrasts many economically destructive pathogens that only exhibit a single or very few hosts. Many plant pathogens exhibit a “two-speed” genome. So described because their genomes contain alternating gene rich, repeat sparse and gene poor, repeat-rich regions. In fungi, the repeat-rich regions may be subjected to a process termed repeat-induced point mutation (RIP). Both repeat activity and RIP are thought to play a significant role in evolution of secreted virulence proteins, termed effectors. We present a complete genome sequence of S. sclerotiorum generated using Single Molecule Real-Time Sequencing technology with highly accurate annotations produced using an extensive RNA sequencing data set. We identified 70 effector candidates and have highlighted their in planta expression profiles. Furthermore, we characterized the genome architecture of S. sclerotiorum in comparison to plant pathogens that exhibit “two-speed” genomes. We show that there is a significant association between positions of secreted proteins and regions with a high RIP index in S. sclerotiorum but we did not detect a correlation between secreted protein proportion and GC content. Neither did we detect a negative correlation between CDS content and secreted protein proportion across the S. sclerotiorum genome. We conclude that S. sclerotiorum exhibits subtle signatures of enhanced mutation of secreted proteins in specific genomic compartments as a result of transposition and RIP activity. However, these signatures are not observable at the whole-genome scale.
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Affiliation(s)
- Mark Derbyshire
- Centre for Crop and Disease Management Department of Environment and Agriculture, Curtin University, Bentley, Perth, Western Australia, Australia
| | - Matthew Denton-Giles
- Centre for Crop and Disease Management Department of Environment and Agriculture, Curtin University, Bentley, Perth, Western Australia, Australia
| | - Dwayne Hegedus
- Agriculture and Agri-Food Canada, Saskatoon, Saskatchewan, Canada
| | | | - Jeffrey Rollins
- Department of Plant Pathology, University of Florida, Gainesville, FL
| | - Jan van Kan
- Laboratory of Phytopathology, Wageningen University, The Netherlands
| | - Michael F. Seidl
- Laboratory of Phytopathology, Wageningen University, The Netherlands
| | - Luigi Faino
- Laboratory of Phytopathology, Wageningen University, The Netherlands
| | - Malick Mbengue
- LIPM Université de Toulouse INRA CNRS, Castanet-Tolosan, France
| | - Olivier Navaud
- LIPM Université de Toulouse INRA CNRS, Castanet-Tolosan, France
| | | | - Kim Hammond-Kosack
- Department of Plant Biology and Crop Sciences, Rothamsted Research, Harpenden, Hertfordshire, United Kingdom
| | - Stephanie Heard
- Department of Plant Pathology, University of Florida, Gainesville, FL
- Department of Plant Biology and Crop Sciences, Rothamsted Research, Harpenden, Hertfordshire, United Kingdom
| | - Richard Oliver
- Centre for Crop and Disease Management Department of Environment and Agriculture, Curtin University, Bentley, Perth, Western Australia, Australia
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10
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Rodriguez L, Gonzalez-Guzman M, Diaz M, Rodrigues A, Izquierdo-Garcia AC, Peirats-Llobet M, Fernandez MA, Antoni R, Fernandez D, Marquez JA, Mulet JM, Albert A, Rodriguez PL. C2-domain abscisic acid-related proteins mediate the interaction of PYR/PYL/RCAR abscisic acid receptors with the plasma membrane and regulate abscisic acid sensitivity in Arabidopsis. THE PLANT CELL 2014; 26:4802-20. [PMID: 25465408 PMCID: PMC4311195 DOI: 10.1105/tpc.114.129973] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2014] [Revised: 11/01/2014] [Accepted: 11/14/2014] [Indexed: 05/18/2023]
Abstract
Membrane-delimited abscisic acid (ABA) signal transduction plays a critical role in early ABA signaling, but the molecular mechanisms linking core signaling components to the plasma membrane are unclear. We show that transient calcium-dependent interactions of PYR/PYL ABA receptors with membranes are mediated through a 10-member family of C2-domain ABA-related (CAR) proteins in Arabidopsis thaliana. Specifically, we found that PYL4 interacted in an ABA-independent manner with CAR1 in both the plasma membrane and nucleus of plant cells. CAR1 belongs to a plant-specific gene family encoding CAR1 to CAR10 proteins, and bimolecular fluorescence complementation and coimmunoprecipitation assays showed that PYL4-CAR1 as well as other PYR/PYL-CAR pairs interacted in plant cells. The crystal structure of CAR4 was solved, which revealed that, in addition to a classical calcium-dependent lipid binding C2 domain, a specific CAR signature is likely responsible for the interaction with PYR/PYL receptors and their recruitment to phospholipid vesicles. This interaction is relevant for PYR/PYL function and ABA signaling, since different car triple mutants affected in CAR1, CAR4, CAR5, and CAR9 genes showed reduced sensitivity to ABA in seedling establishment and root growth assays. In summary, we identified PYR/PYL-interacting partners that mediate a transient Ca(2+)-dependent interaction with phospholipid vesicles, which affects PYR/PYL subcellular localization and positively regulates ABA signaling.
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Affiliation(s)
- Lesia Rodriguez
- Instituto de Biología Molecular y Celular de Plantas, Consejo Superior de Investigaciones Cientificas-Universidad Politecnica de Valencia, ES-46022 Valencia, Spain
| | - Miguel Gonzalez-Guzman
- Instituto de Biología Molecular y Celular de Plantas, Consejo Superior de Investigaciones Cientificas-Universidad Politecnica de Valencia, ES-46022 Valencia, Spain
| | - Maira Diaz
- Instituto de Química Física Rocasolano, Consejo Superior de Investigaciones Científicas, ES-28006 Madrid, Spain
| | - Americo Rodrigues
- Instituto Politécnico de Leiria, Escola Superior de Turismo e Tecnologia do Mar, 2411-901 Peniche, Portugal
| | - Ana C Izquierdo-Garcia
- Instituto de Biología Molecular y Celular de Plantas, Consejo Superior de Investigaciones Cientificas-Universidad Politecnica de Valencia, ES-46022 Valencia, Spain
| | - Marta Peirats-Llobet
- Instituto de Biología Molecular y Celular de Plantas, Consejo Superior de Investigaciones Cientificas-Universidad Politecnica de Valencia, ES-46022 Valencia, Spain
| | - Maria A Fernandez
- Instituto de Biología Molecular y Celular de Plantas, Consejo Superior de Investigaciones Cientificas-Universidad Politecnica de Valencia, ES-46022 Valencia, Spain
| | - Regina Antoni
- Instituto de Biología Molecular y Celular de Plantas, Consejo Superior de Investigaciones Cientificas-Universidad Politecnica de Valencia, ES-46022 Valencia, Spain
| | - Daniel Fernandez
- European Molecular Biology Laboratory, Grenoble Outstation and Unit of Virus Host-Cell Interactions, UJF-EMBL-CNRS, 38042 Grenoble Cedex 9, France
| | - Jose A Marquez
- European Molecular Biology Laboratory, Grenoble Outstation and Unit of Virus Host-Cell Interactions, UJF-EMBL-CNRS, 38042 Grenoble Cedex 9, France
| | - Jose M Mulet
- Instituto de Biología Molecular y Celular de Plantas, Consejo Superior de Investigaciones Cientificas-Universidad Politecnica de Valencia, ES-46022 Valencia, Spain
| | - Armando Albert
- Instituto de Química Física Rocasolano, Consejo Superior de Investigaciones Científicas, ES-28006 Madrid, Spain
| | - Pedro L Rodriguez
- Instituto de Biología Molecular y Celular de Plantas, Consejo Superior de Investigaciones Cientificas-Universidad Politecnica de Valencia, ES-46022 Valencia, Spain
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11
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Wang X, Jiang N, Liu J, Liu W, Wang GL. The role of effectors and host immunity in plant-necrotrophic fungal interactions. Virulence 2014; 5:722-32. [PMID: 25513773 PMCID: PMC4189878 DOI: 10.4161/viru.29798] [Citation(s) in RCA: 107] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2014] [Revised: 06/24/2014] [Accepted: 07/01/2014] [Indexed: 02/07/2023] Open
Abstract
Fungal diseases pose constant threats to the global economy and food safety. As the largest group of plant fungal pathogens, necrotrophic fungi cause heavy crop losses worldwide. The molecular mechanisms of the interaction between necrotrophic fungi and plants are complex and involve sophisticated recognition and signaling networks. Here, we review recent findings on the roles of phytotoxin and proteinaceous effectors, pathogen-associated molecular patterns (PAMPs), and small RNAs from necrotrophic fungi. We also consider the functions of damage-associated molecular patterns (DAMPs), the receptor-like protein kinase BIK1, and epigenetic regulation in plant immunity to necrotrophic fungi.
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Affiliation(s)
- Xuli Wang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests; Institute of Plant Protection; Chinese Academy of Agricultural Sciences; Beijing, PR China
| | - Nan Jiang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests; Institute of Plant Protection; Chinese Academy of Agricultural Sciences; Beijing, PR China
- Hunan Provincial Key Laboratory of Crop Germplasm Innovation and Utilization and College of Agronomy; Hunan Agricultural University; Changsha, Hunan, PR China
| | - Jinling Liu
- Hunan Provincial Key Laboratory of Crop Germplasm Innovation and Utilization and College of Agronomy; Hunan Agricultural University; Changsha, Hunan, PR China
| | - Wende Liu
- State Key Laboratory for Biology of Plant Diseases and Insect Pests; Institute of Plant Protection; Chinese Academy of Agricultural Sciences; Beijing, PR China
| | - Guo-Liang Wang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests; Institute of Plant Protection; Chinese Academy of Agricultural Sciences; Beijing, PR China
- Department of Plant Pathology; Ohio State University; Columbus, OH USA
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12
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de Silva K, Laska B, Brown C, Sederoff HW, Khodakovskaya M. Arabidopsis thaliana calcium-dependent lipid-binding protein (AtCLB): a novel repressor of abiotic stress response. JOURNAL OF EXPERIMENTAL BOTANY 2011; 62:2679-89. [PMID: 21252258 DOI: 10.1093/jxb/erq468] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Ca(2+) is an important second messenger in plant signal transduction pathways regulating stress-induced gene expression. Functional analysis of plant proteins containing Ca(2+)-binding domains (C2 domains) will help us understand the mechanisms behind the role of transcriptional regulators in the Ca(2+) signalling pathway and open new perspectives for crop genetic improvement. We identified a novel transcriptional regulator, a Ca(2+)-dependent lipid-binding protein (AtCLB) containing a C2 domain. AtCLB binds specifically to the promoter of the Arabidopsis thalianol synthase gene (AtTHAS1), whose expression is induced by gravity and light. Here we describe the role of the Atclb gene encoding the AtCLB protein. Expression of the Atclb gene was documented in all analysed tissues of Arabidopsis (leaf, root, stem, flower, and silique) by real-time PCR analysis. Immunofluorescence analysis revealed that AtCLB protein is localized in the nucleus of cells in Arabidopsis root tips. We demonstrated that the AtCLB protein was capable of binding to the membrane lipid ceramide. The role of the Atclb gene in negatively regulating responses to abiotic stress in Arabidopsis thaliana was identified. The loss of the Atclb gene function confers an enhanced drought and salt tolerance and a modified gravitropic response in T-DNA insertion knockout mutant lines. Expression of AtTHAS1 in Atclb knockout mutant lines was increased compared with wild type and a 35S-Atclb overexpression line suggesting AtCLB as a transcriptional repressor of AtTHAS1.
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Affiliation(s)
- Kanishka de Silva
- Department of Applied Science, University of Arkansas at Little Rock, Little Rock, AR 72204, USA
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13
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Park M, Jürgens G. Membrane traffic and fusion at post-Golgi compartments. FRONTIERS IN PLANT SCIENCE 2011; 2:111. [PMID: 22645561 PMCID: PMC3355779 DOI: 10.3389/fpls.2011.00111] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2011] [Accepted: 12/19/2011] [Indexed: 05/18/2023]
Abstract
Complete sequencing of the Arabidopsis genome a decade ago has facilitated the functional analysis of various biological processes including membrane traffic by which many proteins are delivered to their sites of action and turnover. In particular, membrane traffic between post-Golgi compartments plays an important role in cell signaling, taking care of receptor-ligand interaction and inactivation, which requires secretion, endocytosis, and recycling or targeting to the vacuole for degradation. Here, we discuss recent studies that address the identity of post-Golgi compartments, the machinery involved in traffic and fusion or functionally characterized cargo proteins that are delivered to or pass through post-Golgi compartments. We also provide an outlook on future challenges in this area of research.
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Affiliation(s)
- Misoon Park
- Entwicklungsgenetik, Zentrum für Molekularbiologie der Pflanzen, University of TübingenTübingen, Germany
| | - Gerd Jürgens
- Entwicklungsgenetik, Zentrum für Molekularbiologie der Pflanzen, University of TübingenTübingen, Germany
- *Correspondence: Gerd Jürgens, Entwicklungsgenetik, Zentrum für Molekularbiologie der Pflanzen, University of Tübingen, Auf der Morgenstelle 3, 72076 Tübingen, Germany. e-mail:
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