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Fig. 2 | BMC Plant Biology

Fig. 2

From: Root mediated uptake of Salmonella is different from phyto-pathogen and associated with the colonization of edible organs

Fig. 2

In-situ colonization of Salmonella is dependent on lateral roots. (a) Colonization of Salmonella in rhizoplane (left) and root tissue (right) of Col-0 and axr1–3 grown in soil. ANOVA was used to analyze the data. *** = P < 0.001; ns = not significant. Best fit line was plotted (at 95% CI). (b) Invasion index (Log CFU root tissue/Log CFU rhizoplane) for Col-0 and axr 1–3 was plotted over different days. One way ANOVA was used to evaluate the significance. *** = P < 0.001. Each experiment was repeated 3 times with 3 replicate each. (c) One-to-one correlation for root tissue colonization upon co-transplantation of Col-0 and axr 1–3 in same pot containing Salmonella (108cells/g soil). The experiment was repeated 3 times with 5 replicate each. Wilcoxan rank test was used to analyse the data. *** = P < 0.001. (d) Representative image showing remodeling of epidermis and lateral root emergence with Salmonella colonization. The red arrow head shows the space created when lateral root (LR) emerges from primary root (PR). (e) Representative image of transverse section of Arabidopsis root showing Salmonella in between the epidermis (Ep) and cortical cells (Co). (f) Transverse section of emerged lateral root in tomato with 3 representative Z-stacks: i. Surface view of lateral root (LR) and primary root (PR); ii. Remodeling of epidermis (White arrow head) and Salmonella entry through the space between PR and LR; iii. Salmonella colonization in between epidermis and cortical cell layer

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