FIG 4.

The ggaA mutant strain is deficient in cucumber root colonization. (A) CLSM micrographs of cucumber roots colonization by GFP-tagged wild-type and ggaA mutant strains. Ck is a control which was not inoculated with GFP-tagged SQR9. (B) The populations of wild-type and ggaA mutant strains colonizing cucumber seeding roots. Error bars indicate the standard deviations from the results from three independent experiments. Different letters above the bars indicate significant differences (P < 0.01).