Fig. 8

iTRAQ labeling and LC-MS/MS workflow to identify chloroplast proteins in wheat seedling leaves under drought stress and exogenous ALA pretreatment. CK, treated with 0 mg L^− 1 ALA + distilled water; ALA, treated with 100 mg L^− 1 ALA and distilled water; drought, treated with 0 mg L^− 1 ALA without distilled water; D + A, treated with 100 mg L^− 1 ALA without distilled water. The four treatments, CK, ALA, drought, and D + A, were labeled with iTRAQ tags 114, 115, 116, and 117, respectively