Our observation that each HS-responsive miRNA group may have potential targets among all of the groups of stress-responsive genes—the early-up, early-down and late-up genes (figure 6b)—most likely resembles the complex kinetics of miRNA-mediated mRNA repression. Importantly, different miRNA groups target genes belonging to the similar GO functional categories (figure 6c). This observation may indicate that the same cellular processes that are involved in the formation of the adaptive response to HS may be regulated by HS-responsive miRNAs. This continuous control of cellular processes is probably executed by various miRNAs with different expression levels at different time points after HS to provide fine-tuning of gene expression during the HSR.