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Experimental drought models based on osmotic stress and established by supplementation of growth medium with polyethylene glycol (PEG): (A) Lemna minor model, established with aqueous growth medium supplemented with PEG6000 ([68]); (B) Brassica napus model, established with aerated aqueous culture supplemented with PEG8000; and (C) agar-based PEG infusion Arabidopsis thaliana model, established by overlaying solidified agar medium with PEG8000 solution for five days.
