XBP1 and infection: Infection with S. marcescens induced significant or marginally significant increases in transcript abundance for UPR genes bip (figure 2, table 1: pbip, 12hpi = 2.00 × 10−4, pbip, 18hpi = 0.003), ire1 (figure 2, table 1: pire1, 6hpi = 0.013, pire1, 12hpi = 0.028, pire1, 18hpi = 0.043) and atf6 (figure 2, table 1: patf6, 24hpi = 0.050), as well as the spliced and unspliced isoforms of xbp1 (xbp1s and xbp1u, respectively) (figure 2, table 1: pxbp1s, 12hpi = 1.52 × 10−5, pxbp1s, 18hpi = 0.006, pxbp1u, 12hpi = 0.041, pxbp1u, 18hpi = 0.053, pxbp1u, 24hpi = 0.036).