RNA-Seq analysis was performed with total RNA isolated from WT Columbia-0 (Col-0) and PLATZ4 overexpression line treated with or without 30 % PEG6000.

To investigate the molecular mechanism by which PLATZ4 contributes to ABA sensitivity and drought tolerance, we analyzed the transcriptional profiles of PLATZ4 overexpression line and WT plants. The genes differentially regulated under normal conditions were mainly involved in defense, stress, chemical responses, auxin signaling, and the transport of nitrate, ions, and water. The genes differentially regulated after 3 h of drought stress were mainly involved in transcription factor activity, oxidoreductase activity, cell death, and transport of anions, potassium, sodium, and water.