From our study on rice inoculation, it is clear that the root tips, the lateral roots junctions and the germination point were
the three sites for the bacteria entry into rice tissues. It has been reported that many microorganisms enter into and persist in plants by primary colonization via the cracks formed in lateral root junctions (James 2000; Hardoim et al. 2008), and the root tip at the zone of elongation and differentiation (Reinhold- Hurek and Hurek 1998), and then quickly spread to the
intercellular and intracellular spaces (Reinhold-Hurek and Hurek 1998; Chi et al. 2005).