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Related Concept Videos

Phase II Reactions: Methylation Reactions01:17

Phase II Reactions: Methylation Reactions

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Methylation is a phase II biotransformation process involving the attachment of a methyl group to a substrate. Enzymes known as methyltransferases orchestrate this reaction.
The mechanism of methylation unfolds in two stages. The first stage sees a methyltransferase enzyme facilitating the transfer of a methyl group from S-adenosylmethionine (SAM) to the substrate, forming S-adenosylhomocysteine (SAH). The second stage involves further metabolism of SAH into homocysteine, which can be recycled...
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Plants present a rich source of nutrients for many organisms, making it a target for herbivores and infectious agents. Plants, though lacking a proper immune system, have developed an array of constitutive and inducible defenses to fend off these attacks.
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Related Experiment Video

Updated: Feb 25, 2026

Genome-wide Analysis of Histone Modifications Distribution using the Chromatin Immunoprecipitation Sequencing Method in Magnaporthe oryzae
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Phytopathogen-induced changes to plant methylomes.

Tarek Hewezi1, Vince Pantalone2, Morgan Bennett2

  • 1Department of Plant Sciences, University of Tennessee, Knoxville, TN, 37996-4561, USA. thewezi@utk.edu.

Plant Cell Reports
|July 31, 2017
PubMed
Summary
This summary is machine-generated.

DNA methylation changes during plant-pathogen interactions, influencing susceptibility. Understanding these epigenetic shifts can reveal new strategies for enhancing crop pathogen resistance.

Keywords:
DNA methylationGene expressionPhytopathogensTransposable elements

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Area of Science:

  • Plant biology
  • Epigenetics
  • Genomics

Background:

  • DNA methylation is a key epigenetic regulator influencing gene expression, genome stability, and transposon activity.
  • Plant-pathogen interactions involve dynamic changes in DNA methylation patterns, affecting host susceptibility.
  • Differential DNA methylation, acting in cis and trans, modulates plant immune responses.

Purpose of the Study:

  • To explore the role of DNA methylation in plant-pathogen interactions.
  • To investigate how DNA methylation patterns influence plant susceptibility and resistance.
  • To identify epigenetic mechanisms for enhancing crop pathogen resistance.

Main Methods:

  • Analysis of DNA methylation patterns in plants during pathogen infection.
  • Comparison of methylation levels in transposable elements and genic regions.
  • Correlation of methylation changes with host susceptibility and resistance phenotypes.

Main Results:

  • DNA hypomethylation is a common feature of susceptible plant-pathogen interactions.
  • Specific patterns of DNA hypomethylation in different genomic regions correlate with distinct pathogen responses.
  • Epigenetic modifications play a significant role in mediating plant immune responses.

Conclusions:

  • Epigenetic differences, particularly in DNA methylation, underlie phenotypic variations in plant-pathogen interactions.
  • Understanding these epigenetic mechanisms can lead to the development of novel strategies for improving crop resistance.
  • Exploiting epigenetic regulation offers a promising avenue for engineering pathogen-resistant crops.