Figure 3.

The IBA resistance of lon2 mutants is enhanced when combined with deg15-1. A and B, IBA-resistant primary root elongation. After stratification for 1 d, seedlings were grown for 7 d under yellow light on Suc-containing media supplemented with the indicated concentration of IBA. Asterisks denote values significantly different than the wild type (Student's t test, P < 0.001). Three seedlings representing the range of observed phenotypes in A are shown in B. C, IBA promotion of lateral root formation. After stratification for 3 d, seedlings were grown for 4 d on hormone-free media and then transferred to media containing the indicated hormone. After four additional days, lateral roots were counted and primary root lengths were measured. Error bars represent sds of the means (n ≥ 12; A and C).