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Expression of OsPIP1;1, OsPIP1;2, OsPIP2;1, OsPIP2;2, OsPIP2;4, and OsPIP2;6 in root. Rice seedlings were pretreated with (+ Si, black column) or without (−Si, white column) 1.5 mM Si for 3 days and then grown under control, 100 mM NaCl (NaCl), and 18% (w/v) PEG-6000 (PEG) for 6 or 24 h. The data are the mean values ± SE of three independent biological replicates, and different letters show significant differences (P < 0.05).
