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A. tumefaciens viability of after co-cultivation with HP and tobacco cells. Bar = 25 μm. Light microscopic view of A. tumefaciens control (a), after 24 h co-cultivation with HP cells (b), and after 24 h co-cultivation with tobacco BY2 cells (c); epifluoresent view of the corresponding frames on the right (a1, b1 and c1)
