Figure 2.
The transcripts of PR1 and FMO1 and SA content in bak1-4 bkk1-1 are significantly elevated upon light treatment. Quantitative RT-PCR assays demonstrate the expression of SA marker gene PR1 (A) and cell death marker gene FMO1 (B) is extensively up-regulated in bak1-4 bkk1-1 by light. Free SA (C) and total SA (D) contents increase in bak1-4 bkk1-1 1 day after the transfer from dark to long-day condition. Seedlings grown in dark (D) for 4 days then relocated to long-day condition (L) for the indicated days (4D+1L, 4D+2L) and seedlings grown in dark (D) for the indicated days (4D+0L, 5D+0L, 6D+0L) are analyzed.