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Balao F, Medrano M, Bazaga P, Paun O, Alonso C. Long-term methylome changes after experimental seed demethylation and their interaction with recurrent water stress in Erodium cicutarium (Geraniaceae). PLANT BIOLOGY (STUTTGART, GERMANY) 2024. [PMID: 39250311 DOI: 10.1111/plb.13713] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2024] [Accepted: 08/09/2024] [Indexed: 09/11/2024]
Abstract
The frequencies and lengths of drought periods are increasing in subtropical and temperate regions worldwide. Epigenetic responses to water stress could be key for plant resilience to these largely unpredictable challenges. Experimental DNA demethylation, together with application of a stress factor is an appropriate strategy to reveal the contribution of epigenetics to plant responses to stress. We analysed leaf cytosine methylation changes in adult plants of the annual Mediterranean herb, Erodium cicutarium, in a greenhouse, after seed demethylation with 5-Azacytidine and/or recurrent water stress. We used bisulfite RADseq (BsRADseq) and a newly reported reference genome for E. cicutarium to characterize methylation changes in a 2 × 2 factorial design, controlling for plant relatedness. In the long term, 5-Azacytidine treatment alone caused both hypo- and hyper-methylation at individual cytosines, with substantial hypomethylation in CG contexts. In control conditions, drought resulted in a decrease in methylation in all but CHH contexts. In contrast, the genome of plants that experienced recurrent water stress and had been treated with 5-Azacytidine increased DNA methylation level by ca. 5%. Seed demethylation and recurrent drought produced a highly significant interaction in terms of global and context-specific cytosine methylation. Most methylation changes occurred around genic regions and within Transposable Elements. The annotation of these Differentially Methylated Regions associated with genes included several with a potential role in stress responses (e.g., PAL, CDKC, and ABCF), confirming an epigenetic contribution in response to stress at the molecular level.
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Affiliation(s)
- F Balao
- Departamento de Biología Vegetal y Ecología, Universidad de Sevilla, Sevilla, Spain
| | - M Medrano
- Estación Biológica de Doñana, CSIC, Sevilla, Spain
| | - P Bazaga
- Estación Biológica de Doñana, CSIC, Sevilla, Spain
| | - O Paun
- Department of Botany and Biodiversity Research, University of Vienna, Vienna, Austria
| | - C Alonso
- Estación Biológica de Doñana, CSIC, Sevilla, Spain
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2
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Bogan SN, Yi SV. Potential Role of DNA Methylation as a Driver of Plastic Responses to the Environment Across Cells, Organisms, and Populations. Genome Biol Evol 2024; 16:evae022. [PMID: 38324384 PMCID: PMC10899001 DOI: 10.1093/gbe/evae022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2023] [Revised: 01/09/2024] [Accepted: 01/23/2024] [Indexed: 02/09/2024] Open
Abstract
There is great interest in exploring epigenetic modifications as drivers of adaptive organismal responses to environmental change. Extending this hypothesis to populations, epigenetically driven plasticity could influence phenotypic changes across environments. The canonical model posits that epigenetic modifications alter gene regulation and subsequently impact phenotypes. We first discuss origins of epigenetic variation in nature, which may arise from genetic variation, spontaneous epimutations, epigenetic drift, or variation in epigenetic capacitors. We then review and synthesize literature addressing three facets of the aforementioned model: (i) causal effects of epigenetic modifications on phenotypic plasticity at the organismal level, (ii) divergence of epigenetic patterns in natural populations distributed across environmental gradients, and (iii) the relationship between environmentally induced epigenetic changes and gene expression at the molecular level. We focus on DNA methylation, the most extensively studied epigenetic modification. We find support for environmentally associated epigenetic structure in populations and selection on stable epigenetic variants, and that inhibition of epigenetic enzymes frequently bears causal effects on plasticity. However, there are pervasive confounding issues in the literature. Effects of chromatin-modifying enzymes on phenotype may be independent of epigenetic marks, alternatively resulting from functions and protein interactions extrinsic of epigenetics. Associations between environmentally induced changes in DNA methylation and expression are strong in plants and mammals but notably absent in invertebrates and nonmammalian vertebrates. Given these challenges, we describe emerging approaches to better investigate how epigenetic modifications affect gene regulation, phenotypic plasticity, and divergence among populations.
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Affiliation(s)
- Samuel N Bogan
- Department of Ecology, Evolution and Marine Biology, University of California, Santa Barbara, CA, USA
- Department of Ecology and Evolutionary Biology, University of California, Santa Cruz, CA, USA
| | - Soojin V Yi
- Department of Ecology, Evolution and Marine Biology, University of California, Santa Barbara, CA, USA
- Department of Molecular, Cellular and Developmental Biology, University of California, Santa Barbara, CA, USA
- Neuroscience Research Institute, University of California, Santa Barbara, CA, USA
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3
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Yin J, Ren W, Fry EL, Sun S, Han H, Guo F. DNA methylation mediates overgrazing-induced clonal transgenerational plasticity. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 897:165338. [PMID: 37414175 DOI: 10.1016/j.scitotenv.2023.165338] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2023] [Revised: 06/22/2023] [Accepted: 07/03/2023] [Indexed: 07/08/2023]
Abstract
Overgrazing generally induces dwarfism in grassland plants, and these phenotypic traits could be transmitted to clonal offspring even when overgrazing is excluded. However, the dwarfism-transmitted mechanism remains largely unknown, despite generally thought to be enabled by epigenetic modification. To clarify the potential role of DNA methylation on clonal transgenerational effects, we conducted a greenhouse experiment with Leymus chinensis clonal offspring from different cattle/sheep overgrazing histories via the demethylating agent 5-azacytidine. The results showed that clonal offspring from overgrazed (by cattle or sheep) parents were dwarfed and the auxin content of leaves significantly decreased compared to offspring from no-grazed parents'. The 5-azaC application generally increased the auxin content and promoted the growth of overgrazed offspring while inhibited no-grazed offspring growth. Meanwhile, there were similar trends in the expression level of genes related to auxin-responsive target genes (ARF7, ARF19), and signal transduction gene (AZF2). These results suggest that DNA methylation leads to overgrazing-induced plant transgenerational dwarfism via inhibiting auxin signal pathway.
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Affiliation(s)
- Jingjing Yin
- School of Ecology and Environment, Inner Mongolia University, Hohhot, China
| | - Weibo Ren
- School of Ecology and Environment, Inner Mongolia University, Hohhot, China; Key Laboratory of Forage Breeding and Seed Production of Inner Mongolia, Inner Mongolia M-Grass Ecology and Environment (Group) Co., Ltd., Hohhot 010016, China.
| | - Ellen L Fry
- Department of Biology, Edge Hill University, Ormskirk, Lancashire L39 4QP, UK
| | - Siyuan Sun
- School of Ecology and Environment, Inner Mongolia University, Hohhot, China
| | - Huijie Han
- School of Ecology and Environment, Inner Mongolia University, Hohhot, China
| | - Fenghui Guo
- Industrial Crop Institute, Shanxi Agricultural University, Taiyuan, China
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4
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Horvath DP, Clay SA, Swanton CJ, Anderson JV, Chao WS. Weed-induced crop yield loss: a new paradigm and new challenges. TRENDS IN PLANT SCIENCE 2023; 28:567-582. [PMID: 36610818 DOI: 10.1016/j.tplants.2022.12.014] [Citation(s) in RCA: 16] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Revised: 12/13/2022] [Accepted: 12/15/2022] [Indexed: 05/22/2023]
Abstract
Direct competition for resources is generally considered the primary mechanism for weed-induced yield loss. A re-evaluation of physiological evidence suggests weeds initially impact crop growth and development through resource-independent interference. We suggest weed perception by crops induce a shift in crop development, before resources become limited, which ultimately reduce crop yield, even if weeds are subsequently removed. We present the mechanisms by which crops perceive and respond to weeds and discuss the technologies used to identify these mechanisms. These data lead to a fundamental paradigm shift in our understanding of how weeds reduce crop yield and suggest new research directions and opportunities to manipulate or engineer crops and cropping systems to reduce weed-induced yield losses.
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Affiliation(s)
- David P Horvath
- USDA-ARS Edward T. Schafer Agricultural Research Center, Fargo, ND, USA.
| | | | | | - James V Anderson
- USDA-ARS Edward T. Schafer Agricultural Research Center, Fargo, ND, USA
| | - Wun S Chao
- USDA-ARS Edward T. Schafer Agricultural Research Center, Fargo, ND, USA
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Fu QY, Yu CL, Dong R, Shi J, Luo FL, Gao JQ, Li HL, Dong BC, Yu FH. Transgenerational Herbivory Effects on Performance of Clonal Offspring of the Invasive Plant Alternanthera philoxeroides. PLANTS (BASEL, SWITZERLAND) 2023; 12:1180. [PMID: 36904040 PMCID: PMC10005396 DOI: 10.3390/plants12051180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Revised: 02/20/2023] [Accepted: 03/02/2023] [Indexed: 06/18/2023]
Abstract
Interactions between alien plants and local enemies in introduced ranges may determine plant invasion success. However, little is known about whether herbivory-induced responses are transmitted across vegetative generations of plants and whether epigenetic changes are involved during this process. In a greenhouse experiment, we examined the effects of herbivory by the generalist herbivore Spodoptera litura on the growth, physiology, biomass allocation and DNA methylation level of the invasive plant Alternanthera philoxeroides in the first- (G1), second- (G2) and third-generation (G3). We also tested the effects of root fragments with different branching orders (i.e., the primary- or secondary-root fragments of taproots) of G1 on offspring performance. Our results showed that G1 herbivory promoted the growth of the plants in G2 that sprouted from the secondary-root fragments of G1 but had a neutral or negative effect on the growth of the plants in G2 from the primary-root fragments. The growth of plants in G3 was significantly reduced by G3 herbivory but not affected by G1 herbivory. Plants in G1 exhibited a higher level of DNA methylation when they were damaged by herbivores than when they were not, while neither plants in G2 nor G3 showed herbivory-induced changes in DNA methylation. Overall, the herbivory-induced growth response within one vegetative generation may represent the rapid acclimatization of A. philoxeroides to the unpredictable generalist herbivores in the introduced ranges. Herbivory-induced trans-generational effects may be transient for clonal offspring of A. philoxeroides, which can be influenced by the branching order of taproots, but be less characterized by DNA methylation.
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Affiliation(s)
- Qiu-Yue Fu
- School of Ecology and Nature Conservation, Beijing Forestry University, Beijing 100083, China
- Institute of Wetland Ecology & Clone Ecology/Zhejiang Provincial Key Laboratory of Plant Evolutionary Ecology and Conservation, Taizhou University, Taizhou 318000, China
| | - Cheng-Ling Yu
- School of Ecology and Nature Conservation, Beijing Forestry University, Beijing 100083, China
| | - Ran Dong
- School of Ecology and Nature Conservation, Beijing Forestry University, Beijing 100083, China
| | - Juan Shi
- School of Forestry, Beijing Forestry University, Beijing 100083, China
| | - Fang-Li Luo
- School of Ecology and Nature Conservation, Beijing Forestry University, Beijing 100083, China
- The Key Laboratory of Ecological Protection in the Yellow River Basin of National Forestry and Grassland Administration, Beijing Forestry University, Beijing 100083, China
| | - Jun-Qin Gao
- School of Ecology and Nature Conservation, Beijing Forestry University, Beijing 100083, China
- The Key Laboratory of Ecological Protection in the Yellow River Basin of National Forestry and Grassland Administration, Beijing Forestry University, Beijing 100083, China
| | - Hong-Li Li
- School of Ecology and Nature Conservation, Beijing Forestry University, Beijing 100083, China
- The Key Laboratory of Ecological Protection in the Yellow River Basin of National Forestry and Grassland Administration, Beijing Forestry University, Beijing 100083, China
| | - Bi-Cheng Dong
- School of Ecology and Nature Conservation, Beijing Forestry University, Beijing 100083, China
- The Key Laboratory of Ecological Protection in the Yellow River Basin of National Forestry and Grassland Administration, Beijing Forestry University, Beijing 100083, China
| | - Fei-Hai Yu
- Institute of Wetland Ecology & Clone Ecology/Zhejiang Provincial Key Laboratory of Plant Evolutionary Ecology and Conservation, Taizhou University, Taizhou 318000, China
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Morgan BL, Donohue K. Parental methylation mediates how progeny respond to environments of parents and of progeny themselves. ANNALS OF BOTANY 2022; 130:883-899. [PMID: 36201313 PMCID: PMC9758305 DOI: 10.1093/aob/mcac125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Accepted: 10/04/2022] [Indexed: 06/16/2023]
Abstract
BACKGROUND AND AIMS Environments experienced by both parents and offspring influence progeny traits, but the epigenetic mechanisms that regulate the balance of parental vs. progeny control of progeny phenotypes are not known. We tested whether DNA methylation in parents and/or progeny mediates responses to environmental cues experienced in both generations. METHODS Using Arabidopsis thaliana, we manipulated parental and progeny DNA methylation both chemically, via 5-azacytidine, and genetically, via mutants of methyltransferase genes, then measured progeny germination responses to simulated canopy shade in parental and progeny generations. KEY RESULTS We first found that germination of offspring responded to parental but not seed demethylation. We further found that parental demethylation reversed the parental effect of canopy in seeds with low (Cvi-1) to intermediate (Col) dormancy, but it obliterated the parental effect in seeds with high dormancy (Cvi-0). Demethylation did so by either suppressing germination of seeds matured under white-light (Cvi-1) or under canopy (Cvi-0), or by increasing the germination of seeds matured under canopy (Col). Disruption of parental methylation also prevented seeds from responding to their own light environment in one genotype (Cvi-0, most dormant), but it enabled seeds to respond to their own environment in another genotype (Cvi-1, least dormant). Using mutant genotypes, we found that both CG and non-CG DNA methylation were involved in parental effects on seed germination. CONCLUSIONS Parental methylation state influences seed germination more strongly than does the progeny's own methylation state, and it influences how seeds respond to environments of parents and progeny in a genotype-specific manner.
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Affiliation(s)
- Britany L Morgan
- University Program in Ecology Duke University, Durham, NC 27705, USA
- Center for Agricultural Synthetic Biology, University of Tennessee, Knoxville, TN 37996, USA
| | - Kathleen Donohue
- University Program in Ecology Duke University, Durham, NC 27705, USA
- Biology Department, Duke University, Durham, NC 27705, USA
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7
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Xue W, Huang L, Yu F, Bezemer TM. Light condition experienced by parent plants influences the response of offspring to light via both parental effects and soil legacy effects. Funct Ecol 2022. [DOI: 10.1111/1365-2435.14136] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Wei Xue
- Institute of Wetland Ecology & Clone Ecology / Zhejiang Provincial Key Laboratory of Evolutionary Ecology and Conservation Taizhou University Taizhou China
| | - Lin Huang
- Institute of Wetland Ecology & Clone Ecology / Zhejiang Provincial Key Laboratory of Evolutionary Ecology and Conservation Taizhou University Taizhou China
| | - Fei‐Hai Yu
- Institute of Wetland Ecology & Clone Ecology / Zhejiang Provincial Key Laboratory of Evolutionary Ecology and Conservation Taizhou University Taizhou China
| | - T. Martijn Bezemer
- Institute of Biology Leiden (IBL) Aboveground Belowground Interactions Group, Leiden University Leiden The Netherlands
- Department of Terrestrial Ecology Netherlands Institute of Ecology (NIOO‐KNAW) Wageningen The Netherlands
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8
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Quan J, Münzbergová Z, Latzel V. Time dynamics of stress legacy in clonal transgenerational effects: A case study on
Trifolium repens. Ecol Evol 2022; 12:e8959. [PMID: 35646308 PMCID: PMC9130644 DOI: 10.1002/ece3.8959] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Revised: 05/01/2022] [Accepted: 05/05/2022] [Indexed: 12/26/2022] Open
Abstract
Stress can be remembered by plants in a form of stress legacy that can alter future phenotypes of previously stressed plants and even phenotypes of their offspring. DNA methylation belongs among the mechanisms mediating the stress legacy. It is however not known for how long the stress legacy is carried by plants. If the legacy is long‐lasting, it can become maladaptive in situations when parental–offspring environment do not match. We investigated for how long after the last exposure of a parental plant to drought can the phenotype of its clonal offspring be altered. We grew parental plants of three genotypes of Trifolium repens for five months either in control conditions or in control conditions that were interrupted with intense drought periods applied for two months in four different time slots. We also treated half of the parental plants with a demethylating agent (5‐azacytidine, 5‐azaC) to test for the potential role of DNA methylation in the stress memory. Then, we transplanted parental cuttings (ramets) individually to control environment and allowed them to produce offspring ramets for two months. The drought stress experienced by parents affected phenotypes of offspring ramets. The stress legacy resulted in enhanced number of offspring ramets originating from plants that experienced drought stress even 56 days before their transplantation to the control environment. 5‐azaC altered transgenerational effects on offspring ramets. We confirmed that drought stress can trigger transgenerational effects in T. repens that is very likely mediated by DNA methylation. Most importantly, the stress legacy in parental plants persisted for at least 8 weeks suggesting that the stress legacy can persist in a clonal plant Trifolium repens for relatively long period. We suggest that the stress legacy should be considered in future ecological studies on clonal plants.
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Affiliation(s)
- Jiaxin Quan
- Key Laboratory of Resource Biology and Biotechnology in Western China Ministry of Education Northwest University Xi’an China
- Institute of Botany Czech Academy of Sciences Průhonice Czech Republic
| | - Zuzana Münzbergová
- Institute of Botany Czech Academy of Sciences Průhonice Czech Republic
- Department of Botany Faculty of Science Charles University Prague Czech Republic
| | - Vít Latzel
- Institute of Botany Czech Academy of Sciences Průhonice Czech Republic
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9
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Sammarco I, Münzbergová Z, Latzel V. DNA Methylation Can Mediate Local Adaptation and Response to Climate Change in the Clonal Plant Fragaria vesca: Evidence From a European-Scale Reciprocal Transplant Experiment. FRONTIERS IN PLANT SCIENCE 2022; 13:827166. [PMID: 35295625 PMCID: PMC8919072 DOI: 10.3389/fpls.2022.827166] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Accepted: 02/07/2022] [Indexed: 06/01/2023]
Abstract
The ongoing climate crisis represents a growing threat for plants and other organisms. However, how and if plants will be able to adapt to future environmental conditions is still debated. One of the most powerful mechanisms allowing plants to tackle the changing climate is phenotypic plasticity, which can be regulated by epigenetic mechanisms. Environmentally induced epigenetic variation mediating phenotypic plasticity might be heritable across (a)sexual generations, thus potentially enabling rapid adaptation to climate change. Here, we assessed whether epigenetic mechanisms, DNA methylation in particular, enable for local adaptation and response to increased and/or decreased temperature of natural populations of a clonal plant, Fragaria vesca (wild strawberry). We collected ramets from three populations along a temperature gradient in each of three countries covering the southern (Italy), central (Czechia), and northern (Norway) edges of the native European range of F. vesca. After clonal propagation and alteration of DNA methylation status of half of the plants via 5-azacytidine, we reciprocally transplanted clones to their home locality and to the other two climatically distinct localities within the country of their origin. At the end of the growing season, we recorded survival and aboveground biomass as fitness estimates. We found evidence for local adaptation in intermediate and cold populations in Italy and maladaptation of plants of the warmest populations in all countries. Plants treated with 5-azacytidine showed either better or worse performance in their local conditions than untreated plants. Application of 5-azacytidine also affected plant response to changed climatic conditions when transplanted to the colder or warmer locality than was their origin, and the response was, however, country-specific. We conclude that the increasing temperature will probably be the limiting factor determining F. vesca survival and distribution. DNA methylation may contribute to local adaptation and response to climatic change in natural ecosystems; however, its role may depend on the specific environmental conditions. Since adaptation mediated by epigenetic variation may occur faster than via natural selection on genetic variants, epigenetic adaptation might to some degree help plants in keeping up with the ongoing environmental crisis.
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Affiliation(s)
- Iris Sammarco
- Institute of Botany, Czech Academy of Sciences, Průhonice, Czechia
- Department of Botany, Faculty of Science, Charles University, Prague, Czechia
| | - Zuzana Münzbergová
- Institute of Botany, Czech Academy of Sciences, Průhonice, Czechia
- Department of Botany, Faculty of Science, Charles University, Prague, Czechia
| | - Vít Latzel
- Institute of Botany, Czech Academy of Sciences, Průhonice, Czechia
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Functional trait effects on ecosystem stability: assembling the jigsaw puzzle. Trends Ecol Evol 2021; 36:822-836. [PMID: 34088543 DOI: 10.1016/j.tree.2021.05.001] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Revised: 04/29/2021] [Accepted: 05/05/2021] [Indexed: 11/21/2022]
Abstract
Under global change, how biological diversity and ecosystem services are maintained in time is a fundamental question. Ecologists have long argued about multiple mechanisms by which local biodiversity might control the temporal stability of ecosystem properties. Accumulating theories and empirical evidence suggest that, together with different population and community parameters, these mechanisms largely operate through differences in functional traits among organisms. We review potential trait-stability mechanisms together with underlying tests and associated metrics. We identify various trait-based components, each accounting for different stability mechanisms, that contribute to buffering, or propagating, the effect of environmental fluctuations on ecosystem functioning. This comprehensive picture, obtained by combining different puzzle pieces of trait-stability effects, will guide future empirical and modeling investigations.
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11
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Atighi MR, Verstraeten B, De Meyer T, Kyndt T. Genome-wide shifts in histone modifications at early stage of rice infection with Meloidogyne graminicola. MOLECULAR PLANT PATHOLOGY 2021; 22:440-455. [PMID: 33580630 PMCID: PMC7938626 DOI: 10.1111/mpp.13037] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Revised: 11/16/2020] [Accepted: 01/13/2021] [Indexed: 05/29/2023]
Abstract
Epigenetic processes play a crucial role in the regulation of plant stress responses, but their role in plant-pathogen interactions remains poorly understood. Although histone-modifying enzymes have been observed to be deregulated in galls induced by root-knot nematodes (RKN, Meloidogyne graminicola) in rice, their influence on plant defence and their genome-wide impact has not been comprehensively investigated. First, the role of histone modifications in plant-nematode interactions was confirmed by pharmacological inhibition of histone-modifying enzymes, which all significantly affected rice susceptibility to RKN. For a more specific view, three histone marks, H3K9ac, H3K9me2, and H3K27me3, were subsequently studied by chromatin-immunoprecipitation-sequencing on RKN-induced galls at 3 days postinoculation. While levels of H3K9ac and H3K27me3 were strongly enriched, H3K9me2 was generally depleted in galls versus control root tips. Differential histone peaks were generally associated with plant defence-related genes. Transcriptome analysis using RNA-Seq and RT-qPCR-based validation revealed that genes marked with H3K9ac or H3K9me2 showed the expected activation or repression gene expression pattern, but this was not the case for H3K27me3 marks. Our results indicate that histone modifications respond dynamically to RKN infection, and that posttranslational modifications mainly at H3K9 specifically target plant defence-related genes.
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Affiliation(s)
| | | | - Tim De Meyer
- Department of Data Analysis & Mathematical ModellingGhent UniversityGhentBelgium
| | - Tina Kyndt
- Department of BiotechnologyGhent UniversityGhentBelgium
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12
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Puy J, Carmona CP, Dvořáková H, Latzel V, de Bello F. Diversity of parental environments increases phenotypic variation in Arabidopsis populations more than genetic diversity but similarly affects productivity. ANNALS OF BOTANY 2021; 127:425-436. [PMID: 32463878 PMCID: PMC7988527 DOI: 10.1093/aob/mcaa100] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Accepted: 05/22/2020] [Indexed: 05/22/2023]
Abstract
BACKGROUND AND AIMS The observed positive diversity effect on ecosystem functioning has rarely been assessed in terms of intraspecific trait variability within populations. Intraspecific phenotypic variability could stem both from underlying genetic diversity and from plasticity in response to environmental cues. The latter might derive from modifications to a plant's epigenome and potentially last multiple generations in response to previous environmental conditions. We experimentally disentangled the role of genetic diversity and diversity of parental environments on population productivity, resistance against environmental fluctuations and intraspecific phenotypic variation. METHODS A glasshouse experiment was conducted in which different types of Arabidopsis thaliana populations were established: one population type with differing levels of genetic diversity and another type, genetically identical, but with varying diversity levels of the parental environments (parents grown in the same or different environments). The latter population type was further combined, or not, with experimental demethylation to reduce the potential epigenetic diversity produced by the diversity of parental environments. Furthermore, all populations were each grown under different environmental conditions (control, fertilization and waterlogging). Mortality, productivity and trait variability were measured in each population. KEY RESULTS Parental environments triggered phenotypic modifications in the offspring, which translated into more functionally diverse populations when offspring from parents grown under different conditions were brought together in mixtures. In general, neither the increase in genetic diversity nor the increase in diversity of parental environments had a remarkable effect on productivity or resistance to environmental fluctuations. However, when the epigenetic variation was reduced via demethylation, mixtures were less productive than monocultures (i.e. negative net diversity effect), caused by the reduction of phenotypic differences between different parental origins. CONCLUSIONS A diversity of environmental parental origins within a population could ameliorate the negative effect of competition between coexisting individuals by increasing intraspecific phenotypic variation. A diversity of parental environments could thus have comparable effects to genetic diversity. Disentangling the effect of genetic diversity and that of parental environments appears to be an important step in understanding the effect of intraspecific trait variability on coexistence and ecosystem functioning.
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Affiliation(s)
- Javier Puy
- Department of Botany, Faculty of Sciences, University of South Bohemia, České Budějovice, Czech Republic
- Institute of Botany, Czech Academy of Sciences, Průhonice, Czech Republic
- For correspondence. E-mail
| | - Carlos P Carmona
- Institute of Ecology and Earth Sciences, Department of Botany, University of Tartu, Tartu, Estonia
| | - Hana Dvořáková
- Department of Botany, Faculty of Sciences, University of South Bohemia, České Budějovice, Czech Republic
| | - Vít Latzel
- Institute of Botany, Czech Academy of Sciences, Průhonice, Czech Republic
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13
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Puy J, de Bello F, Dvořáková H, Medina NG, Latzel V, Carmona CP. Competition-induced transgenerational plasticity influences competitive interactions and leaf decomposition of offspring. THE NEW PHYTOLOGIST 2021; 229:3497-3507. [PMID: 33111354 DOI: 10.1111/nph.17037] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Accepted: 10/15/2020] [Indexed: 06/11/2023]
Abstract
Phenotypic plasticity, within and across generations (transgenerational plasticity), allows organisms and their progeny to adapt to the environment without modification of the underlying DNA. Recent findings suggest that epigenetic modifications are important mediators of such plasticity. However, empirical studies have, so far, mainly focused on plasticity in response to abiotic factors, overlooking the response to competition. We tested for within-generation and transgenerational phenotypic plasticity triggered by plant-plant competition intensity, and we tested whether it was mediated via DNA methylation, using the perennial, apomictic herb Taraxacum brevicorniculatum in four coordinated experiments. We then tested the consequences of transgenerational plasticity affecting competitive interactions of the offspring and ecosystem processes, such as decomposition. We found that, by promoting differences in DNA methylation, offspring of plants under stronger competition developed faster and presented more resource-conservative phenotypes. Further, these adjustments associated with less degradable leaves, which have the potential to reduce nutrient turnover and might, in turn, favour plants with more conservative traits. Greater parental competition enhanced competitive abilities of the offspring, by triggering adaptive phenotypic plasticity, and decreased offspring leaf decomposability. Our results suggest that competition-induced transgenerational effects could promote rapid adaptations and species coexistence and feed back on biodiversity assembly and nutrient cycling.
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Affiliation(s)
- Javier Puy
- Department of Botany, Faculty of Sciences, University of South Bohemia, České Budějovice, 37005, Czech Republic
- Zoology, School of Natural Sciences, Trinity College Dublin, Dublin 2, D02 PN40, Ireland
| | - Francesco de Bello
- Department of Botany, Faculty of Sciences, University of South Bohemia, České Budějovice, 37005, Czech Republic
- Centro de Investigaciones sobre Desertificación, Valencia, 46113, Spain
| | - Hana Dvořáková
- Department of Botany, Faculty of Sciences, University of South Bohemia, České Budějovice, 37005, Czech Republic
| | - Nagore G Medina
- Department of Botany, Faculty of Sciences, University of South Bohemia, České Budějovice, 37005, Czech Republic
- Departamento de Biología, Universidad Autónoma de Madrid, Madrid, 28049, Spain
- Centro de Investigación en Biodiversidad y Cambio Global (CIBC-UAM), Universidad Autónoma de Madrid, Madrid, 28049, Spain
| | - Vit Latzel
- Institute of Botany, Czech Academy of Sciences, Průhonice, 25243, Czech Republic
| | - Carlos P Carmona
- Institute of Ecology and Earth Sciences, Department of Botany, University of Tartu, Tartu, 51005, Estonia
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14
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Genitoni J, Vassaux D, Delaunay A, Citerne S, Portillo Lemus L, Etienne MP, Renault D, Stoeckel S, Barloy D, Maury S. Hypomethylation of the aquatic invasive plant, Ludwigia grandiflora subsp. hexapetala mimics the adaptive transition into the terrestrial morphotype. PHYSIOLOGIA PLANTARUM 2020; 170:280-298. [PMID: 32623739 DOI: 10.1111/ppl.13162] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2019] [Revised: 06/17/2020] [Accepted: 06/29/2020] [Indexed: 06/11/2023]
Abstract
Ongoing global changes affect ecosystems and open up new opportunities for biological invasion. The ability of invasive species to rapidly adapt to new environments represents a relevant model for studying short-term adaptation mechanisms. The aquatic invasive plant, Ludwigia grandiflora subsp. hexapetala, is classified as harmful in European rivers. In French wet meadows, this species has shown a rapid transition from aquatic to terrestrial environments with emergence of two distinct morphotypes in 5 years. To understand the heritable mechanisms involved in adjustment to such a new environment, we investigate both genetic and epigenetic as possible sources of flexibility involved in this fast terrestrial transition. We found a low overall genetic differentiation between the two morphotypes arguing against the possibility that terrestrial morphotype emerged from a new adaptive genetic capacity. Artificial hypomethylation was induced on both morphotypes to assess the epigenetic hypothesis. We analyzed global DNA methylation, morphological changes, phytohormones and metabolite profiles of both morphotype responses in both aquatic and terrestrial conditions in shoot and root tissues. Hypomethylation significantly affected morphological variables, phytohormone levels and the amount of some metabolites. The effects of hypomethylation depended on morphotypes, conditions and plant tissues, which highlighted differences among the morphotypes and their plasticity. Using a correlative integrative approach, we showed that hypomethylation of the aquatic morphotype mimicked the characteristics of the terrestrial morphotype. Our data suggest that DNA methylation rather than a new adaptive genetic capacity is playing a key role in L. grandiflora subsp. hexapetala plasticity during its rapid aquatic to terrestrial transition.
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Affiliation(s)
- Julien Genitoni
- ESE, Ecology and Ecosystem Health, Institut Agro, INRAE, Rennes, 35042, France
- Laboratoire de Biologie des Ligneux et des Grandes Cultures (LBLGC), EA1207 USC1328 INRA, Université d'Orléans, Orléans, 45067, France
| | - Danièle Vassaux
- ESE, Ecology and Ecosystem Health, Institut Agro, INRAE, Rennes, 35042, France
| | - Alain Delaunay
- Laboratoire de Biologie des Ligneux et des Grandes Cultures (LBLGC), EA1207 USC1328 INRA, Université d'Orléans, Orléans, 45067, France
| | - Sylvie Citerne
- Institut Jean-Pierre Bourgin, INRAE, AgroParisTech, Université Paris-Saclay, Versailles, 78000, France
| | - Luis Portillo Lemus
- ESE, Ecology and Ecosystem Health, Institut Agro, INRAE, Rennes, 35042, France
| | - Marie-Pierre Etienne
- Institut Agro, CNRS, Université Rennes, IRMAR (Institut de Recherche Mathématique de Rennes) - UMR 6625, Rennes, F-35000, France
| | - David Renault
- UMR CNRS 6553 EcoBio, University of Rennes 1, Rennes, France
- Institut Universitaire de France, 1 rue Descartes, Paris, France
| | - Solenn Stoeckel
- IGEPP, INRAE, Institut Agro, Université Rennes, Le Rheu, 35653, France
| | - Dominique Barloy
- ESE, Ecology and Ecosystem Health, Institut Agro, INRAE, Rennes, 35042, France
| | - Stéphane Maury
- Laboratoire de Biologie des Ligneux et des Grandes Cultures (LBLGC), EA1207 USC1328 INRA, Université d'Orléans, Orléans, 45067, France
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15
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Latzel V, Münzbergová Z, Skuhrovec J, Novák O, Strnad M. Effect of experimental DNA demethylation on phytohormones production and palatability of a clonal plant after induction via jasmonic acid. OIKOS 2020. [DOI: 10.1111/oik.07302] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Vít Latzel
- Inst. of Botany, Czech Academy of Sciences, Dept of Population Ecology Zámek 1 CZ‐252 43 Průhonice Czech Republic
| | - Zuzana Münzbergová
- Inst. of Botany, Czech Academy of Sciences, Dept of Population Ecology Zámek 1 CZ‐252 43 Průhonice Czech Republic
- Dept of Botany, Faculty of Science, Charles Univ. Prague Czech Republic
| | | | - Ondřej Novák
- Laboratory of Growth Regulators, Czech Academy of Sciences, Inst. of Experimental Botany and Palacký Univ. Olomouc Czech Republic
| | - Miroslav Strnad
- Laboratory of Growth Regulators, Czech Academy of Sciences, Inst. of Experimental Botany and Palacký Univ. Olomouc Czech Republic
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16
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Atighi MR, Verstraeten B, De Meyer T, Kyndt T. Genome-wide DNA hypomethylation shapes nematode pattern-triggered immunity in plants. THE NEW PHYTOLOGIST 2020; 227:545-558. [PMID: 32162327 PMCID: PMC7317725 DOI: 10.1111/nph.16532] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2019] [Accepted: 02/26/2020] [Indexed: 05/22/2023]
Abstract
A role for DNA hypomethylation has recently been suggested in the interaction between bacteria and plants; it is unclear whether this phenomenon reflects a conserved response. Treatment of plants of monocot rice and dicot tomato with nematode-associated molecular patterns from different nematode species or bacterial pathogen-associated molecular pattern flg22 revealed global DNA hypomethylation. A similar hypomethylation response was observed during early gall induction by Meloidogyne graminicola in rice. Evidence for the causal impact of hypomethylation on immunity was revealed by a significantly reduced plant susceptibility upon treatment with DNA methylation inhibitor 5-azacytidine. Whole-genome bisulphite sequencing of young galls revealed massive hypomethylation in the CHH context, while not for CG or CHG nucleotide contexts. Further, CHH hypomethylated regions were predominantly associated with gene promoter regions, which was not correlated with activated gene expression at the same time point but, rather, was correlated with a delayed transcriptional gene activation. Finally, the relevance of CHH hypomethylation in plant defence was confirmed in rice mutants of the RNA-directed DNA methylation pathway and DECREASED DNA METHYLATION 1. We demonstrated that DNA hypomethylation is associated with reduced susceptibility in rice towards root-parasitic nematodes and is likely to be part of the basal pattern-triggered immunity response in plants.
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Affiliation(s)
| | | | - Tim De Meyer
- Department of Data Analysis & Mathematical ModellingGhent UniversityB‐9000GhentBelgium
| | - Tina Kyndt
- Department of BiotechnologyGhent UniversityB‐9000GhentBelgium
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17
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Experimental DNA Demethylation Associates with Changes in Growth and Gene Expression of Oak Tree Seedlings. G3-GENES GENOMES GENETICS 2020; 10:1019-1028. [PMID: 31941723 PMCID: PMC7056980 DOI: 10.1534/g3.119.400770] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Epigenetic modifications such as DNA methylation, where methyl groups are added to cytosine base pairs, have the potential to impact phenotypic variation and gene expression, and could influence plant response to changing environments. One way to test this impact is through the application of chemical demethylation agents, such as 5-Azacytidine, which inhibit DNA methylation and lead to a partial reduction in DNA methylation across the genome. In this study, we treated 5-month-old seedlings of the tree, Quercus lobata, with foliar application of 5-Azacytidine to test whether a reduction in genome-wide methylation would cause differential gene expression and change phenotypic development. First, we demonstrate that demethylation treatment led to 3–6% absolute reductions and 6.7–43.2% relative reductions in genome-wide methylation across CG, CHG, and CHH sequence contexts, with CHH showing the strongest relative reduction. Seedlings treated with 5-Azacytidine showed a substantial reduction in new growth, which was less than half that of control seedlings. We tested whether this result could be due to impact of the treatment on the soil microbiome and found minimal differences in the soil microbiome between two groups, although with limited sample size. We found no significant differences in leaf fluctuating asymmetry (i.e., deviations from bilateral symmetry), which has been found in other studies. Nonetheless, treated seedlings showed differential expression of a total of 23 genes. Overall, this study provides initial evidence that DNA methylation is involved in gene expression and phenotypic variation in seedlings and suggests that removal of DNA methylation affects plant development.
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18
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Herrera CM, Medrano M, Pérez R, Bazaga P, Alonso C. Within-plant heterogeneity in fecundity and herbivory induced by localized DNA hypomethylation in the perennial herb Helleborus foetidus. AMERICAN JOURNAL OF BOTANY 2019; 106:798-806. [PMID: 31157419 DOI: 10.1002/ajb2.1291] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Accepted: 03/26/2019] [Indexed: 06/09/2023]
Abstract
PREMISE Phenotypic heterogeneity of reiterated, homologous structures produced by individual plants has ecological consequences for plants and their animal consumers. This paper examines experimentally the epigenetic mosaicism hypothesis, which postulates that within-plant variation in traits of reiterated structures may partly arise from different parts of the same genetic individual differing in patterns or extent of genomic DNA methylation. METHODS Leaves of paired ramets borne by field-growing Helleborus foetidus plants were infiltrated periodically over the entire flowering period with either a water solution of the demethylating agent zebularine or just water as the control. The effects of the zebularine treatment were assessed by quantifying genome-wide DNA cytosine methylation in leaves and monitoring inflorescence growth and flower production, number of ovules per flower, pollination success, fruit set, seed set, seed size, and distribution of sap-feeding insects. RESULTS Genomic DNA from leaves in zebularine-treated ramets was significantly less methylated than DNA from leaves in control ones. Inflorescences in treated ramets grew smaller and produced fewer flowers, with fewer ovules and lower follicle and seed set, but did not differ from inflorescences in untreated ramets in pollination success or seed size. The zebularine treatment influenced the within-plant distribution of sap-feeding insects. CONCLUSIONS Experimental manipulation of genomic DNA methylation level in leaves of wild-growing H. foetidus plants induced considerable within-plant heterogeneity in phenotypic (inflorescences, flowers, fecundity) and ecologically relevant traits (herbivore distribution), which supports the hypothesis that epigenetic mosaicism may partly account for within-plant variation.
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Affiliation(s)
- Carlos M Herrera
- Estación Biológica de Doñana, Consejo Superior de Investigaciones Científicas (CSIC), Avenida Américo Vespucio 26, 41092, Sevilla, Spain
| | - Mónica Medrano
- Estación Biológica de Doñana, Consejo Superior de Investigaciones Científicas (CSIC), Avenida Américo Vespucio 26, 41092, Sevilla, Spain
| | - Ricardo Pérez
- Instituto de Investigaciones Químicas, Centro de Investigaciones Científicas Isla de La Cartuja, Consejo Superior de Investigaciones Científicas (CSIC)-Universidad de Sevilla, Sevilla, Spain
| | - Pilar Bazaga
- Estación Biológica de Doñana, Consejo Superior de Investigaciones Científicas (CSIC), Avenida Américo Vespucio 26, 41092, Sevilla, Spain
| | - Conchita Alonso
- Estación Biológica de Doñana, Consejo Superior de Investigaciones Científicas (CSIC), Avenida Américo Vespucio 26, 41092, Sevilla, Spain
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Alonso C, Ramos‐Cruz D, Becker C. The role of plant epigenetics in biotic interactions. THE NEW PHYTOLOGIST 2019; 221:731-737. [PMID: 30156271 PMCID: PMC6726468 DOI: 10.1111/nph.15408] [Citation(s) in RCA: 86] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2018] [Accepted: 07/22/2018] [Indexed: 05/07/2023]
Abstract
Contents Summary 731 I. Biotic interactions in the context of genetic, epigenetic and environmental diversity 731 II. Biotic interactions affect epigenetic configuration 732 III. Plant epigenetic configuration influences biotic interactions 733 IV. Epigenetic memory in the context of biotic interactions 734 V. Conclusions and future research 735 Acknowledgements 735 Author contributions 735 References 735 SUMMARY: Plants are hubs of a wide range of biotic interactions with mutualist and antagonist animals, microbes and neighboring plants. Because the quality and intensity of those relationships can change over time, a fast and reversible response to stress is required. Here, we review recent studies on the role of epigenetic factors such as DNA methylation and histone modifications in modulating plant biotic interactions, and discuss the state of knowledge regarding their potential role in memory and priming. Moreover, we provide an overview of strategies to investigate the contribution of epigenetics to environmentally induced phenotypic changes in an ecological context, highlighting possible transitions from whole-genome high-resolution analyses in plant model organisms to informative reduced representation analyses in genomically less accessible species.
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Affiliation(s)
- Conchita Alonso
- Estación Biológica de DoñanaConsejo Superior de Investigaciones Científicas (CSIC)Av. Américo Vespucio 26Sevilla41092Spain
| | - Daniela Ramos‐Cruz
- Gregor Mendel Institute of Molecular Plant BiologyAustrian Academy of SciencesVienna Biocenter (VBC)Dr. Bohr Gasse 3Vienna1030Austria
| | - Claude Becker
- Gregor Mendel Institute of Molecular Plant BiologyAustrian Academy of SciencesVienna Biocenter (VBC)Dr. Bohr Gasse 3Vienna1030Austria
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20
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Latzel V, Münzbergová Z. Anticipatory Behavior of the Clonal Plant Fragaria vesca. FRONTIERS IN PLANT SCIENCE 2018; 9:1847. [PMID: 30619415 PMCID: PMC6297673 DOI: 10.3389/fpls.2018.01847] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2018] [Accepted: 11/28/2018] [Indexed: 05/07/2023]
Abstract
Active foraging for patchy resources is a crucial feature of many clonal plant species. It has been recently shown that plants' foraging for resources can be facilitated by anticipatory behavior via association of resource position with other environmental cues. We therefore tested whether clones of Fragaria vesca are able to associate and memorize positions of soil nutrients with particular light intensity, which will consequently enable them anticipating nutrients in new environment. We trained clones of F. vesca for nutrients to occur either in shade or in light. Consequently, we tested their growth response to differing light intensity in the absence of soil nutrients. We also manipulated epigenetic status of a subset of the clones to test the role of DNA methylation in the anticipatory behavior. Clones of F. vesca were able to associate presence of nutrients with particular light intensity, which enabled them to anticipate nutrient positions in the new environment based on its light intensity. Clones that had been trained for nutrients to occur in shade increased placement of ramets to shade whereas clones trained for nutrients to occur in light increased biomass of ramets in light. Our study clearly shows that the clonal plant F. vesca is able to relate two environmental factors, light and soil nutrients, and use this connection in anticipatory behavior. We conclude that anticipatory behavior can substantially improve the ability of clonal plants to utilize scarce and unevenly distributed resources.
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Affiliation(s)
- Vít Latzel
- Department of Population Ecology, Institute of Botany, The Czech Academy of Sciences, Průhonice, Czechia
| | - Zuzana Münzbergová
- Department of Population Ecology, Institute of Botany, The Czech Academy of Sciences, Průhonice, Czechia
- Department of Botany, Faculty of Science, Charles University, Prague, Czechia
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21
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Münzbergová Z, Latzel V, Šurinová M, Hadincová V. DNA methylation as a possible mechanism affecting ability of natural populations to adapt to changing climate. OIKOS 2018. [DOI: 10.1111/oik.05591] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Zuzana Münzbergová
- Dept of Botany, Faculty of Science, Charles Univ; Prague Czech Republic
- Inst. of Botany, The Czech Academy of Sciences; Průhonice Czech Republic
| | - Vít Latzel
- Inst. of Botany, The Czech Academy of Sciences; Průhonice Czech Republic
| | - Maria Šurinová
- Dept of Botany, Faculty of Science, Charles Univ; Prague Czech Republic
- Inst. of Botany, The Czech Academy of Sciences; Průhonice Czech Republic
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