Figure 7

Internal colonization of Oryza sativa roots by H. rubrisubalbicans . The number of endophytic bacteria colonizing internal rice root tissues was determined 3, 5, 7 and 9 days after inoculation (d.a.i.). The plants were superficially disinfected and the roots were cut, homogenized, diluted and plated. The plates were kept at 30°C for 24 hours and colonies counted. Results are shown as means of Log₁₀ (number of bacteria. g^-1 of fresh root) ± standard deviation (Student t-test; P < 0.05). The experiment contained five different plants for each condition. This experiment was repeated on at least three separate dates.