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Growth reduction after 48 days of sorbitol (0.2 M) stressed plantlets versus their control (α 0.05, n= 7−8). Bars marked with the same letter do not differ significantly from each other; a < b. The picture of the in vitro plantlets shows a control plant on the left and a stressed plant on the right. All roots and leafs have newly been formed during the 48 days.
