Figure 5.

ers1 etr1 Developmental Defects Are Rescued Completely by the ein2-1 Mutation

(A) Phenotypes of etiolated seedlings. Seedlings were grown on agar plates in the dark for 4 days in either air or 35 ppm of ethylene (Eth). ein2 ers1 etr1 triple mutants exhibit complete ethylene insensitivity.

(B) Phenotypes of light-grown seedlings. Seedlings were grown in the light for 3 days. ein2 ers1 etr1 mutants no longer exhibit cupped cotyledons, shortened roots, and prolific root hairs. Col, Columbia wild type.

(C) Floral phenotypes of adult plants. Flowers are of equivalent ages starting with developmental stage 12. ein2 ers1 etr1 mutants no longer exhibit defects in floral development.

(D) Quantification of the hypocotyl response of mutant and wild-type seedlings. Seedlings were grown on agar plates in the dark for 3 days in either air (dark bars) or 35 ppm of ethylene (light bars). At least 20 seedlings were measured for each treatment.