PPP1R8 and infection: To study the role of BR-bodies during infection, M. truncatula seedlings were inoculated with wild type (RNase E), BR-body-deficient mutant (RNase EΔIDR), rne+, or C. crescentus IDR hybrid S. meliloti cells, and the plants were grown and monitored on nitrogen-free medium for 42 days (Fig. 5).