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. 2006 May;188(10):3654–3663. doi: 10.1128/JB.188.10.3654-3663.2006

FIG. 4.

FIG. 4.

Structures of Vigna unguiculata nodules formed by Rhizobium sp. strain NGR234 (A, C, and E) and the y4gM mutant NGRΩgM (B, D, and F). (A and B) Low-magnification light micrographs of whole nodules. Magnification, ×35. Bar, 200 μm. (C and D) High-magnification light micrographs of nodule sections. Magnification, ×312. Bar, 32 μm. (E and F) Electron micrographs of bacteroidal tissue. Magnification, ×8,650. Bar, 2 μm. Abbreviations: b, bacteroids; c, nodule cortex; i, infected cells; phb, polyhydroxybutyrate; r, roots. The black arrow points to an amyloplast containing starch granules, and the black circle indicates peribacteroid membranes.