Figure 1
From: Policing the legume-Rhizobium symbiosis: a critical test of partner choice

Comparison of the non-fixing strain RU3940, (a,c) and the otherwise isogenic fixing strain Rlv3841 (b,d). After five weeks of growth, plants inoculated with the non-fixing strain (a) had reduced biomass and produced fewer peas than those inoculated with the fixing strain (b). The non-fixing strain formed white (c), rather than pink (d), nodules, indicating a lack of leghaemoglobin. Scale bars indicate 200 μm.