Zeitschriftenartikel
Gollan, T.; Schurr, U.; Schulze, E. D.: Stomatal response to drying soil in relation to changes in the xylem sap composition of Helianthus annuus. I. The concentration of cations, anions, amino acids in and pH of, the sylem sap. Plant, Cell and Environment
15 (5), S. 551 - 561 (1992)