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. 2012 Jun 11;3:112. doi: 10.3389/fpls.2012.00112

FIGURE 1.

FIGURE 1

Effects of B55 inoculation on seedlings growth in vitro. Experimental design (A). Effect of a B55 inoculation on WT and 35S-etr1 seedlings, grown vertically and horizontally (B). Mean (±SE) seedling surface area, number of true leaves, chlorophyll a and b content (C), primary root length, number of lateral roots and B55 colonization in the rhizo- and endospheres (D) of mock- or B55-inoculated WT and 35S-etr1 seedlings. White bars represent control treatments, black bars, B55-inoculated seeds (PLSD test of an ANOVA between mock- and B55-inoculated plants: *P < 0.05; **P < 0.01; ***P < 0.001). CFU, colony forming unit; FM, fresh mass; n.d., not detected. n = 4 replicate Petri dishes containing at least 20 or 7 seeds (vertical placement), n = 5 replicate Petri dishes containing at least 20 seeds (for colonization).