Figure 5.

Ala Substitution Mutants Reveal BIK1 Residues Required for the Arabidopsis Triple Response.

Triple response phenotypes (A) and hypocotyl lengths (B) of bik1 and BIK1 substitution seedlings on 20 μM ACC (+) and unsupplemented MS media (−). Data in (B) represent mean ± se from a minimum of 60 seedlings. Experiments were repeated at least three times with similar results. Statistical analysis was performed as described in the legend of Figure 2. All BIK1 site-directed mutants are expressed in the bik1 background. wt, wild type.