Figure 4

ECR2 is involved in the CTR1-dependent but not -independent ethylene receptor signaling. Etiolated seedling hypocotyl measurement (A), rosette phenotype (B), and ERF1 expression (C) of ecr2-1 ctr1-10 with and without the ethylene-insensitive etr1-1 or etr1-2 allele. Etiolated seedling phenotype (D), hypocotyl measurement (E), rosette phenotype (F) and ERF1 mRNA expression (G) in ecr2-1 ctr1-10 lines expressing ETR1p:etr1-1^1-349. (H) etr1-1 mRNA levels in etr1-1 as the control and etr1-1^1-349 levels in ecr2-1 ctr1-10 ETR1p:etr1-1^1-349 lines, respectively. Etiolated seedling phenotype (I) and hypocotyl measurement (J), light-grown seedlings (K), rosette phenotype (L), and ERF1 expression (M) in ecr2-1 ctr1-8. Senescence phenotype (N) and chlorophyll a content (O) in ecr2-1 ctr1-8 before (day 0) and after (day 5) the test. Data are mean ± SD for the seedling hypocotyl measurement and chlorophyll a content, and mean ± SE for gene expression.