Fig. 4

The micrographs of Gus-tagged Burkholderia sp. SS5 (a–d), Klebsiella sp. SS2 (e–h), Novosphingobium sp. TR4 (i–l) and Sphingomonas sp. PS5 (m–p) during colonization on radical-coleoptiles (a, e, i and m; scale bar, 5 mm) and root hairs (b, f, j and n; scale bar, 20 μm) of rice 3 days after inoculation, and close-up view of bacterial infection of root tips (c, g, k and o); scale bar, 2 mm) and leaf tip (d, h, l and p; scale bar, 2 mm) at 7 days post inoculation