(A) Effect of rdm3-1 and rdm3-2 on luminescence and kanamycin-resistance phenotypes in the ros1 background. Plants were grown on MS plates and subjected to luminescence imaging after cold treatment (4°C, 24 h). The plants were also grown on MS plates with kanamycin (50 μg/ml) and photographed after 10 days. (B) Northern blot analysis of RNA levels of endogenous RD29A, RD29A-LUC, and 35S-NPTII in wild type, ros1, and ros1rdm3-1. The constitutively expressed 18S rRNA was used as an RNA loading control while COR15A was used as a cold treatment control.