Figure 4.
Protein N-glycosylation is altered in iU1 seedlings under salt stress. (A) Immunoblot analysis of N-glycoprotein profiles. The blots were hybridized with anti-HRP antibody or ConA (Concanavalin A, a jack bean lectin). Arrows indicate variations in band intensity between Col-0 and the iU1 lines under salt treatment. The cgl1-3 mutant proteins were loaded as an N-glycosylation control. (B,C) Immunoblot analyses reveal the change in the glycosylated state of PDI5 under 200 mM NaCl (B) or other salt concentration treatments (C). PNGase F and Endo H are enzymes that can remove N-glycan chains from glycoproteins and produce unglycosylated proteins. Total proteins were extracted from 14-day-old seedlings subjected to NaCl treatment. At least three independent experiments were performed in this study, and consistent results were obtained. Coomassie blue (CB) staining was used as a loading control.