<i>ICE1</i> demethylation drives the range expansion of a plant invader through cold tolerance divergence

Xie, Hairong; Li, H.; Liu, D.; Dai, Weimin; He, Jian; Liu, Shangjun; Duan, Hongying; Liu, L. L.; Chen, S. G.; Song, Xiaoling; Valverde, Bernal E.; Sheng, Qiang

doi:10.1111/mec.13067

Cited by 56 publications

(72 citation statements)

References 47 publications

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“…A. adenophora has also invaded many climatic niches that are much cooler than currently occupied in its native range (towards left along the 1st axis of PCA, see Figure ). This can be related to a study carried out in China (Xie et al, ) which demonstrated the importance of epigenetic control in regulating cold tolerance in different populations of A. adenophora . Xie et al () found a significant correlation between freezing tolerance and number of methylated sites in the genome that controlled the expression of genes conferring cold tolerance.…”

Section: Discussionmentioning

confidence: 68%

Niche expansion of the invasive plant species Ageratina adenophora despite evolutionary constraints

Datta

Schweiger

Kühn

2019

Journal of Biogeography

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Aim Ecological inferences drawn from studies on niche dynamics of invasive species are often limited due to difficulties in disentangling evolutionary adaptations of the fundamental niche from demographic and interspecific processes shaping the realized niche. We used Ageratina adenophora, an invasive plant with restricted evolutionary potential to investigate shifts in the realized climatic niche independent of potential evolutionary adaptations. Location Native Mexican range; exotic ranges in Asia, the USA, the Canary Islands and Australia. Taxon Invasive Asteraceae A. adenophora (Spreng.) R.M.King & H.Rob. Commonly known as Crofton weed. Methods We compiled a robust occurrence dataset of A. adenophora for its native Mexican range and four exotic ranges (Asia, USA, Canary Islands, and Australia) and quantified pairwise niche overlap (Schoener's D) and niche dynamic (stable, unfilling and expansion) indices between the native and exotic ranges in reduced climatic space using smoothed occurrence densities. Niche shift was statistically tested using niche equivalency tests. Results The value of niche overlap (Schoener's D) differed considerably, ranging from relatively high between Mexico and Asia to low between Mexico and Australia. The niche dynamic indices indicated highest level of niche stability in Asia while highest degree of unstable niche was detected in Australia due to both niche expansion and unfilling. The niche similarity tests indicated that the native niche is more similar to the exotic niche than any randomly sampled niche from the exotic range. However, the niche equivalency tests showed evidence of niche differentiation as the observed niche overlap was lower than expected by chance for all pairwise comparisons. Jointly these tests indicate that despite the similarity, the native niche is not perfectly identical to any of the exotic niches. Main conclusions The current study has direct implications for understanding range expansion of invasive species even in the absence of evolutionary adaptation. Our study indicates that invasive species can occupy different, non‐consistent realized climatic niches in different parts of the world, thus limiting the transferability of species distribution models and corresponding risk assessments or future projections.

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Section: Discussionmentioning

confidence: 68%

Niche expansion of the invasive plant species Ageratina adenophora despite evolutionary constraints

Datta

Schweiger

Kühn

2019

Journal of Biogeography

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“…Conversely, some studies convincingly link specific epigenetic state changes to adaptive effects, but without demonstrating their stress-induction or heritable transmission (e.g., Xie et al, 2015). Resolving the entire causal pathway, from stress induction, to precise epigenetic changes and their transmission, to phenotypic effects and functional consequences, is a demanding task indeed.…”

Section: Discussionmentioning

confidence: 99%

Context-Dependent Developmental Effects of Parental Shade Versus Sun Are Mediated by DNA Methylation

2018

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Parental environment influences progeny development in numerous plant and animal systems. Such inherited environmental effects may alter offspring phenotypes in a consistent way, for instance when resource-deprived parents produce low quality offspring due to reduced maternal provisioning. However, because development of individual organisms is guided by both inherited and immediate environmental cues, parental conditions may have different effects depending on progeny environment. Such context-dependent transgenerational plasticity suggests a mechanism of environmental inheritance that can precisely interact with immediate response pathways, such as epigenetic modification. We show that parental light environment (shade versus sun) resulted in context-dependent effects on seedling development in a common annual plant, and that these effects were mediated by DNA methylation. We grew replicate parents of five highly inbred Polygonum persicaria genotypes in glasshouse shade versus sun and, in a fully factorial design, measured ecologically important traits of their isogenic seedling offspring in both environments. Compared to the offspring of sun-grown parents, the offspring of shade-grown parents produced leaves with greater mean and specific leaf area, and had higher total leaf area and biomass. These shade-adaptive effects of parental shade were pronounced and highly significant for seedlings growing in shade, but slight and generally non-significant for seedlings growing in sun. Based on both regression and covariate analysis, inherited effects of parental shade were not mediated by changes to seed provisioning. To test for a role of DNA methylation, we exposed replicate offspring of isogenic shaded and fully insolated parents to either the demethylating agent zebularine or to control conditions during germination, then raised them in simulated growth chamber shade. Partial demethylation of progeny DNA had no phenotypic effect on offspring of shaded parents, but caused offspring of sun-grown parents to develop as if their parents had been shaded, with larger leaves and greater total canopy area and biomass. These results contribute to the increasing body of evidence that DNA methylation can mediate transgenerational environmental effects, and show that such effects may contribute to nuanced developmental interactions between parental and immediate environments.

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“…Further, we anticipated a concurrent but stronger epigenetic signature of oil exposure, given its reflection of gene expression and physiological response to environmental stimuli (Dowen et al., 2012; Verhoeven, Jansen, et al., 2010; Verhoeven, Van Dijk, et al. 2010; Xie et al., 2015). …”

Section: Introductionmentioning

confidence: 99%

Genetic and epigenetic variation in Spartina alterniflora following the Deepwater Horizon oil spill

Robertson

Schrey

Shayter

et al. 2017

Evolutionary Applications

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Catastrophic events offer unique opportunities to study rapid population response to stress in natural settings. In concert with genetic variation, epigenetic mechanisms may allow populations to persist through severe environmental challenges. In 2010, the Deepwater Horizon oil spill devastated large portions of the coastline along the Gulf of Mexico. However, the foundational salt marsh grass, Spartina alterniflora, showed high resilience to this strong environmental disturbance. Following the spill, we simultaneously examined the genetic and epigenetic structure of recovering populations of S. alterniflora to oil exposure. We quantified genetic and DNA methylation variation using amplified fragment length polymorphism and methylation sensitive fragment length polymorphism (MS‐AFLP) to test the hypothesis that response to oil exposure in S. alterniflora resulted in genetically and epigenetically based population differentiation. We found high genetic and epigenetic variation within and among sites and found significant genetic differentiation between contaminated and uncontaminated sites, which may reflect nonrandom mortality in response to oil exposure. Additionally, despite a lack of genomewide patterns in DNA methylation between contaminated and uncontaminated sites, we found five MS‐AFLP loci (12% of polymorphic MS‐AFLP loci) that were correlated with oil exposure. Overall, our findings support genetically based differentiation correlated with exposure to the oil spill in this system, but also suggest a potential role for epigenetic mechanisms in population differentiation.

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ICE1 demethylation drives the range expansion of a plant invader through cold tolerance divergence

Cited by 56 publications

References 47 publications

Niche expansion of the invasive plant species Ageratina adenophora despite evolutionary constraints

Niche expansion of the invasive plant species Ageratina adenophora despite evolutionary constraints

Context-Dependent Developmental Effects of Parental Shade Versus Sun Are Mediated by DNA Methylation

Genetic and epigenetic variation in Spartina alterniflora following the Deepwater Horizon oil spill

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