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Comparison of bacteroid dimensions within nodules of T. subterraneum ‘Campeda’ carrying R. leguminosarum bv. trifolii (R. l. trifolii strains). Nodule samples are (A) WSM1325 (Effective); (B) SRDI565 (Sub-optimal) and (C) WSM2304 (Ineffective-differentiated). Note that bacteroid length and width was determined at a lower magnification (×2000–4000) than the higher magnification displayed here (×11 000). The scale in (C) also applies to (A) and (B).
