Callose-Regulated Symplastic Communication Coordinates Symbiotic Root Nodule Development (Current Biology)

Gaudioso-Pedraza et al. show that symplastic communication regulates the formation of nitrogen-fixing nodules. Rhizobia-induced callose (?-1,3-glucan) turnover, which is orchestrated by the ?-1,3-glucanase MtBG2, promotes cellular connectivity required for the expression of key regulators and for coordinating organ development and colonization.