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. 2013 Aug 2;8(8):e70531. doi: 10.1371/journal.pone.0070531

Figure 1. Nodule sections of Vigna unguiculata and Leucaena leucocephala.

Figure 1

(A–B) Nitrogen fixing nodules of V. unguiculata (21 days post inoculation, A) and L. leucocephala (35 days post inoculation, B). (C–D) Semithin sections of nodules from V. unguiculata (C) and L. leucocephala (D), the asterisk indicates the meristem zone of indeterminate nodules of L. leucocephala (D). (E–F) Ultrathin sections of nodules from V. unguiculata (E) and L. leucocephala (F), red arrowheads indicate the peribacteroid membrane; and PHB granules are seen as electron-transparent droplets in the cytoplasm of bacteroids.