The determinations of Glycinebetaine contents and leave water potential in potatoes. GB levels (A) and leaf water potential (B) in non-transgenic (NT) and transgenic (SC) plants under water stress simulated with 20% PEG. GB was extracted from non-treated and 20% PEG-treated plants. Samples were collected after 48 h of PEG treatment. Data are expressed as the mean ± standard deviation (SD) of five replicates.