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Effect of PEG-6000 concentration on sugars content (mg g−1 FW) for in vitro culture of apple (A) and cherry (B) cultivars. All values were recalculated relative to the compound content in untreated samples taken as 100%. GLU, glucose; FRU, fructose; GLY, glycerol; SOR, sorbitol; SUC, sucrose. The statistical data are shown in Supplementary Material Tables S1 and S2.
