Figure 1
From: Isolation of a strong Arabidopsis guard cell promoter and its potential as a research tool
Transcriptional profiles of guard cell expressed genes in both guard cells and mesophyll cells. Average transcript levels of KAT1 (At5g46240), AtMYB60 (At1g08810), AtMYB61 (At1g09540), RAB18 (At5g66400), GC1 (At1g22690), and AtACT7 (At5g09810) from two independent microarrays are displayed. While KAT1, AtMYB60 and GC1 all exhibited guard cell-specific expression, the transcript level of GC1 was the highest among the three genes. RAB18 also exhibited very strong guard cell expression, but its expression level in mesophyll cells was strongly induced by ABA treatment.