Root hair 1.Recognition and attachment (rhicadhesin-mediated) Rhizobial cell 2.Excretion of nod factors by bacterium causing root hair curling 3.Invasion.Rhizobia penetrate root hair and multiply within an "infection thread" 4.Bacteria in infection thread grow toward root cell Infection thread Figure 19-61 part 1 Brock Biology of Microorganisms 11/e 2006 Pearson Prentice Hall,Inc. 16 Microbiology,Shanghai Jiao Tong University
16 Microbiology, Shanghai Jiao Tong University
4.Bacteria in infection thread grow toward root cell Infection thread Invaded plant cells and those nearby are stimulated to divide 5.Formation of bacteroid state within plant cell 6.Continued plant and Nodules bacterial cell division Figure 19-61 part 2 Brock Biology of Microorganisms 11/e 17 2006 Pearson Prentice Hall,Inc. Micropioiogy,Snangnai Jiao i ong University
17 Microbiology, Shanghai Jiao Tong University