Abstract: Over the last century, the anthropogenic production of CO2 has led to warmer and more acidic oceans, resulting in increasingly frequent and severe mass bleaching events worldwide. Unless corals adapt or acclimate to these unprecedentedly fast changes, further loss of coral cover and diversity seems inevitable over the coming decades. However, the mechanisms and rates by which corals can acclimatize and adapt to environmental changes are still poorly understood.
Work on model systems has shown that environmentally induced alterations in DNA methylation can lead to phenotypic acclimatization. While DNA methylation has been observed in corals, its potential role in phenotypic plasticity and acclimation has not yet been described.
Here, Prof. Aranda provides an overview of our current knowledge on DNA methylation in corals and discuss its potential as an epigenetic mechanism for regulating phenotypic acclimation and transgenerational plasticity in these organisms.