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Assay for salt stress tolerance of SiPTI1–5 transformed. The pET32a-SiPTI1–5 fusion vectors were transformed into E. coli (BL21) cells. The transformants were cultivated on LB plates with 0, 100 and 250 mM NaCl for 24 h. The 10− 1, 10− 2, 10− 3 and 10− 4 represent the dilution fold. Bar = 1 cm (A). Growth curves of pET32a-SiPTI1–5 plasmids containing BL21 strains in LB liquid medium with 250 mmol/L of NaCl. Transformant with empty vector pET32a was used as a control (B)
