Figure 10.

Model of sugarcane miR408 regulation in response to pathogen and beneficial endophytic diazotrophic bacteria. Pathogens attack sugarcane and trigger an upregulation of copper transporter as well as an increase in copper inside the cell resulting in a repression of miR408; consequently, the level of its targets increases. This regulation can result in cell wall lignification and browning. In contrast, the upregulation of miR408 can result in beneficial diazotrophic bacteria colonization by the cleavage of laccase.