Role of epigenetics in mangroves: recent progress and future perspectives

Epigenetic modifications in plants involve heritable changes in gene expression patterns that are not due to changes in gene sequences. Unlike genetic adaptations, which are long-term evolutionary changes, epigenetic modifications, such as DNA methylation, histone modifications, and noncoding RNAs, act as adaptive responses and allow plants to better cope with environmental stresses. As mangroves are uniquely located between the land and sea and remain continuously exposed to varying salinity, submergence, and hypoxia stresses, it is expected that certain epigenetic mechanisms might help them withstand the impacts of recurring stress fluctuations. Therefore, understanding the role of epigenetic regulation in mangrove stress adaptations to the intertidal environment is crucial. Despite only few studies to date having investigated epigenetic responses in mangroves, they nonetheless provide important insights into this process on which to base future research. Here, we present an update on recent progress in mangrove epigenetic research and offer perspectives on the potential roles of various epigenetic players in mangrove adaptations to the intertidal environment.