How do epigenetic changes influence plant responses to environmental stress?

Plants constantly face various environmental stresses, such as drought, salinity, and pathogen attacks, which necessitate rapid and adaptable responses. Recent studies have highlighted the role of epigenetics—heritable changes in gene expression that do not involve alterations to the DNA sequence—in mediating these responses. Epigenetic mechanisms, such as DNA methylation, histone modification, and non-coding RNAs, enable plants to 'remember' past stress encounters and prepare for future similar challenges. Understanding how these changes occur and influence plant resilience can lead to the development of crops better suited to withstand the increasing environmental variability caused by climate change. What are the specific epigenetic pathways involved, and how might they be harnessed to improve agricultural productivity?