Abstract
Two clones of Populus trichocarpa varying in growth rate were grown in nutrient solutions with a range of K supply. In the leaves an antagonism between the levels of K and Ca+Mg was found, this was most extreme in the older leaves. Analysis of the contents of these elements in leaf vacuoles and cytoplasm suggests that in the vacuoles the total contents of K+Ca+Mg are controlled to maintain ionic and osmotic balance. At low K supply, the K deficit in the cytoplasm is not balance by accumulation of Ca and Mg, and it is suggested that other organic osmotica may accumulate. The regulation of K+Mg+Ca supplied to the leaves seems to be regulated by the roots and is not simple competition of ions for uptake sites at the plasmalemma.
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References
Chapin FS 1980 Ann Rev Ecol Syst 11, 233–260.
Forster H and Mengel K 1969 Z Acker Pflanzenbau 131, 203–215.
Mengel K and Kirby EA (1982) Principles of plant nutrition. Intern Potash Inst, Bern.
Marschner H 1983 Mineral nutrition of higher plants. Acad Press, London.
Diem B 1993 Untersuchung zur Wirkung von variierter K-, N- und P-Ernährung auf sechs unterschiedlich wüchsige Balsam-Pappelklone (Populus trichocarpa Torr et Grey) PhD Thesis Uni Frankfurt, Frankfurt, Germany.
Fritz E 1989 Scan Microscop. 3, 517–552.
Houman F Godbold DL Majcherczyk A Wang S Hüttermann A 1991 Can J For Res 21, 1748–1757.
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Diem, B., Godbold, D.L. Potassium, calcium and magnesium antagonism in clones of Populus trichocarpa . Plant Soil 155, 411–414 (1993). https://doi.org/10.1007/BF00025070
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DOI: https://doi.org/10.1007/BF00025070