FIG. 3.

Expression analysis of nifA region. (A) Structure of lacZ fusion constructs: DNA fragments cloned in suicide vector pVIK112 and the genetic organization resulting after integration of the pVIKM plasmids in the genome. The designations of the derivative GLF reporter strains are indicated on the left. (B) Appearance of 21-day-old pea plants inoculated with the R. leguminosarum GLF1 (plant a), GLF2 (plant b), and GLF4 (plant c) strains containing nifA::lacZ genomic fusions. Root nodules are shown below the corresponding inoculated plants.