Figure 7.

Putative roles of the eight CrRLK1L genes evaluated during nodule organogenesis in common bean. Graphic representation of the proposed roles of the eight CrRLK1L genes of common bean, based on the RT-qPCR data obtained in this study. Different stages corresponding to days post-inoculation (dpi) are observed. At the early stages, the bacteria and the root establish a molecular dialogue, which promotes curling of the root hair where the bacteria are enclosed in an infection chamber (not shown). One to three days before the bacteria become trapped, an infection thread (IT) is formed, which advances through the infected root hair cell, reaching the outer cortex of the root. Concurrently, cortex cells de-differentiate and divide. By 5 dpi, dividing cells in the outer cortex generate a nodule primordium, whereas the IT branches toward the primordium. By 1 nitrogen fixation rates.