Micrographs of banana roots colonized by GFP-tagged B. amyloliquefaciens strain W19 after 7 d of inoculation in the
vermiculite culture system for three treatments using confocal laser scanning microscopy: un-inoculated banana seedlings (CK1, a
and d); strain-inoculated banana roots with the stem removed (CK2, b and e); strain-inoculated living banana roots (T, c and
f). GFP-tagged W19 cells (white points) are indicated by the arrow.