Plants are very sensitive to temperature, even 1℃ changes in temperature can affect plant growth, development and seed set. The effect of temperature on plant morphology is known as thermomorphogenesis and several genes associated with thermal response have been identified in Arabidopsis thaliana. Previously, it has been shown that POWERDRESS (PWR), a SANT domain protein, is important for thermomorphogenesis in A. thaliana. Consistent with the idea that SANT domain is involved in interacting with histone tails and histone modifying enzymes, PWR-mediated histone deacetylation is essential for temperature-induced expression of genes such as PIF4 and YUC8. This seems to be contradictory to the general association that deacetylation is generally associated with suppression of gene expression. PIF4 and YUC8 are induced at warm temperature despite having their respective locus deacetylated (H3K9ac). On the other hand, eviction/incorporation dynamics of the histone variant H2A.Z is also associated with thermal response at the transcriptional level. RNA-seq analysis revealed that PWR dampens the transcriptional responses due to temperature. Strikingly, a significant overlap was observed in case of pwr DEGs and another list of genes where the gene bodies are associated with high H2A.Z. These outcomes lead to the question whether two distinct histone marks – H3 acetylation and H2A.Z nucleosomal dynamics influencing each other or not, and how the gene expression is regulated by epigenetic modifications in A. thaliana. We present some of our recent findings on this question using genome-wide chromatin immunoprecipitation and affinity purification-sequencing studies. Our findings are expected to provide a better understanding about chromatin regulation in thermal responses in A. thaliana.