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Fig. 7 | Plant Methods

Fig. 7

From: Hydroponic cultivation conditions allowing the reproducible investigation of poplar root suberization and water transport

Fig. 7

Osmotic stress experimental series. a–f Pictures visualizing the gradual decline of poplar plant vitality with decreasing osmotic potentials. Osmotic potentials of the nutrient solution below − 0.8 MPa resulted in irreversible plant damage (e, f). g Root lengths after 5 weeks of hydroponic cultivation including a final week of osmotic stress. The dotted reference line for 4-week-old roots is based on Fig. 3c. Roots ≤ 5 cm of length were excluded from the analysis, as they have emerged significantly later and were not entirely exposed to the osmotic stress conditions. Differential letters indicate significant differences (Kruskal–Wallis ANOVA) at p ≤ 0.05. n = 34–81 individual roots from 1 biological replicate per stress treatment

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