Cluster analyses of DTGs involved in shared pathways among C24, Col-0, and Ws ecotypes. DTGs involved in cell wall homeostasis (A), transporters (B), Ca2+ signaling (C), and phytohormone synthesis and signal transduction (D) are shown. In the heat maps, red indicates up-regulated genes, green indicates down-regulated genes, and black indicates a lack of significant expression change during the hydrotropic response.