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Analysis of sorbitol, Suc, Glc, and Fru concentrations in Plantago phloem exudates. Plantago plants were watered with 40 mL of water or with 40 mL of 400 mm NaCl. After 10 h, fully developed source leaves were detached from the rosettes (one leaf per treated plant), petioles were dipped into 750 μL of EDTA solution (20 mm EDTA, pH 8.0), and phloem exudates were collected for 10 h. Carbohydrate concentrations in this solution are given (n = 12).
