Epigenetics in Plant Response to Climate Change

Since the last glacial maximum, the Earth has experienced drastic climate changes. However, with the advent of the Industrial Revolution, human activities have abruptly intensified, altering the planet's climate patterns. Climate models predict that over the next hundred years, the globe will experience even more drastic changes than those observed in the past 20,000 years. Understanding how plants adapt to environmental changes has thus become a critical research priority. Currently, evidence suggests that plants adapt to environmental changes primarily through two distinct pathways: one mediated by genetic variation and the other involving the direct or indirect participation of epigenetic modifications. Given the unprecedented rate of contemporary climate change, epigenetic mechanisms may exert a more immediate and flexible influence than genetic modifications. Epigenetics, including DNA methylation, histone modification, and non-coding RNA, plays an important role in the post-transcriptional regulation process and affects the growth and development of plants, as well as their responses to environmental changes. In this review, we synthesize current knowledge on the epigenetic mechanisms underlying plant responses to environmental changes and examine the dynamic interplay between epigenetic regulation and environmental stimuli, aiming to provide insights into enhancing the tolerance of plants to environmental stress factors.