Figure 3 .
Differential activity of the SRKb promoter in the Col-0 nrpd1a mutant and in various A. thaliana accessions. Activity of the SRKbpr::uidA:nos reporter was assayed in flowers at the +1-stage of development by histochemical analysis of GUS activity and by real-time RT-PCR of stigma tissue. (A−D) SRKbpr::uidA:nos transformants (A) Col-0 (B) Col-0 nrpd1a (C) Rld, and (D) C24. (E) Col-0[AtS1pr::uidA:nos] used as control. (F) Real-time RT-PCR of GUS transcripts in stigma tissue of SRKbpr::uidA:nos transformants of four A. thaliana accessions and the Col-0 nrpd1a mutant.