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Studies on the dependence on temperature of the salt uptake of roots. I. The relative size of the temperature coefficients (Q10) of cation and anion uptake. II. The temperature coefficients of cation and anion uptake as dependent on the salt concentration.



Studies on the dependence on temperature of the salt uptake of roots. I. The relative size of the temperature coefficients (Q10) of cation and anion uptake. II. The temperature coefficients of cation and anion uptake as dependent on the salt concentration.



Ber. Schweiz. Bot. Ges, 58: 123-130; 383-390



Using a dilute NaCl + KC1 solution, 10-day-old wheat plants at 15 degrees absorbed more cations than anions (1.6: 1). At 25 degrees the ratio was 1.1: 1. A rise in temperature increased anion relative to cation uptake. The temperature coefficient 25 degrees /15 degrees was 1.6 for cations and 1.9 for anions. At a higher concentration cation increased more than anion uptake. The coefficient was again higher for anions and was higher for the dilute than the concentrated solution.

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