Figure 2.

ABA Suppresses Nod Factor and S. meliloti–Induced Gene Expression.

(A) and (B) ABA effect on early nodulin gene expression was assayed using transgenic plants containing ENOD11:GUS (A) or qRT-PCR of RIP1 (B).

(A) Pretreatment with ABA (concentrations indicated) inhibits ENOD11 induction following 1 nM Nod factor treatment. The blue color represents GUS expression.

(B) Pretreatment with 10 μM ABA abolished S. meliloti induction of RIP1 in both wild-type and ethylene-insensitive skl plants. Error bars represent se.