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. 2004 Jun;186(11):3609–3620. doi: 10.1128/JB.186.11.3609-3620.2004

FIG. 7.

FIG. 7.

Visualization of S. meliloti sitA promoter activity in M. sativa nodules. Nodules of M. sativa were harvested, thin sectioned, and stained with the dye X-Gluc. (A) M. sativa nodule induced by the S. meliloti wild-type strain carrying pJP2. (B) M. sativa nodule induced by the S. meliloti fur mutant carrying sitA promoter-gusA fusion plasmid pTCC1. (C) M. sativa nodule induced by the S. meliloti wild-type strain carrying pTCC1. Abbreviations: M, meristem; I, infection zone; N, nitrogen fixation zone.