Time-resolved transcriptional changes of selected genes representing the sulfate reduction pathway (sat, dsrA), ribosomal proteins of the large (rplA) and small (rpsC) subunit, the GroEL chaperon (groL), cell division (ftsZ), DNA replication (gyrB), and peptidoglycan synthesis (murA). Panels represent the various substrate incubations: initial, initial peat soil to set up peat microcosms; +/−S, incubations with or without external sulfate, respectively. The size and color of the dots represent average FPKM values of the respective normalized gene expression.