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Growth parameters in drought-stressed I. walleriana grown ex vitro: Changes in shoots fresh weight (FW) (a), total leaf area (b) and shoots dry weight (DW) (c) were examined at the “start point”, 15% and 5% of soil moisture content—0, 1 and 2, respectively; results represent mean ± SE (n = 8). The letters indicate statistically significant differences based on the Fischer LSD test (p ≤ 0.05).
