Living organisms integrate environmental signals with intrinsic developmental programs to control gene regulatory networks for optimized survival. Transcription potential is determined by the accessibility of DNA sequences within the chromatin, which can be adjusted from a compact status to an easy-to-access condition, and vice verse, through individual or combined epigenetic modifications. Plants live naturally with many different soil microorganisms, among which bacteria are the most abundant. Certain beneficial soil microbes are capable of affecting plant growth and/or stress response through microbial volatile emissions. We are interested in the molecular mechanisms underlying microbial volatile-mediated plant growth regulation, as well as epigenetic mechanisms underlying gene regulatory networks that are responsible for plant-microbe interactions.