Fig 5. Assays for GUS expression driven by the series PsMPT promoter.

(A) Schematic diagram of the PsMPT promoter deletions and mutation that were used to analyze the activity of different fragments of the PsMPT promoter. All fragmented promoter were fused to a GUS reporter gene. (B) Quantitative analyses of GUS expression in transgenic plants driven by deletion or muted constructs of PsMPT promoter in response to chilling. (C) GUS activity in transgenic Arabidopsis plants. The inflorescence of 5-week-old Arabidopsis plants was used as material, and five independent lines for every treatment.