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Parental experience modifies the Mimulus methylome.

Jack M Colicchio1,2, John K Kelly3, Lena C Hileman3

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Summary
This summary is machine-generated.

Parental leaf damage in Mimulus guttatus increases epigenetic diversity in offspring by altering DNA methylation variability. This epigenetic variation may be a key mechanism driving transgenerational plasticity.

Keywords:
EpigeneticsMethylationMimulus guttatusTransgenerational plasticity

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Area of Science:

  • Plant biology
  • Epigenetics
  • Genomics

Background:

  • Transgenerational plasticity allows parental environmental experiences to influence offspring development.
  • Mimulus guttatus leaf damage demonstrates transgenerational plasticity via differential gene expression.
  • Epigenetic mechanisms underlying this transgenerational response remain largely undescribed.

Purpose of the Study:

  • To investigate the epigenetic mechanisms, specifically DNA methylation, involved in transgenerational plasticity in Mimulus guttatus.
  • To determine how parental leaf damage affects the methylome of the progeny.

Main Methods:

  • Whole genome bisulfite sequencing was performed on progeny from damaged and control parent plants.
  • A computational pipeline was developed to compare methylation mean and variance between treatment groups.
  • Differentially Methylated Regions (DMRs) were identified across the genome.

Main Results:

  • Parental damage increased the variability of CG and CHG methylation in progeny without altering the overall mean.
  • 3,396 CHH, 203 CG, and 54 CHG DMRs were identified across the genome.
  • CHG/CHH DMRs often overlapped with transposable elements, while CG DMRs overlapped with gene coding regions.

Conclusions:

  • Parental stress can enhance epigenetic diversity in offspring, suggesting a role for increased methylome variation.
  • The association between CG DMRs and differentially expressed genes supports DNA methylation as a mechanism for transgenerational plasticity in Mimulus guttatus.