FIGURE 10.7 Schematic representations of different nodulation ontogenies. VB, vascular bundle; Rh, Rhizobium or Bradyrhizobium inoculant; Ac, actinomycete (i.e., Frankia) inoculant; C, cortex; P, pericycle-associated cell divisions; IA, infected area and region of nitrogen fixation; LR, lateral root (emerging or dormant) with associated root meristem; NM, nodule meristem. (Rolfe and Gresshoff, 1988. Reprinted with permission of Annual Reviews,

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