Summary
Buckwheat was grown in media in which the supply of nitrate and potassium was varied. The relation between nitrate assimilation and the carboxylate content of the plant was examined.
In full supply of nitrate total carboxylate came from and was equivalent to the assimilated nitrate. Only when this nutrient was depleted, bicarbonate was absorbed and assimilated as the alternative source which caused carboxylate to accumulate in excess of the deficient level of organic nitrogen.
Shortage of potassium had no effect on the level of carboxylate because increased uptake of calcium and magnesium replaced the missing potassium.
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References
Breteler H., A comparison between ammonium and nitrate nutrition of young sugar-beet plants grown in nutrient solutions at constant acidity. 1. Production of dry matter, ionic balance and chemical composition. Neth. J. Agr. Sci. 21, 227–244 (1973).
Dijkshoorn W., Metabolic regulation of the alkaline effect of nitrate utilization in plants. Nature 192, 165–167 (1962).
Dijkshoorn, W., Partition of ionic constituents between organs. In: Recent Advances in Plant Nutrition, ed. R. Samish, vol. II, 447–476. London 1971.
Dijkshoorn, W., Organic acids and their role in ion uptake. In: Chemistry and Biochemistry of Herbage, ed. G. W. Butler and R. W. Bailyy, Vol. II, 163–187. London 1973.
Dijkshoorn W., LathwellD. J. and deWitC. T., Temporal changes in carboxylate content of ryegrass with stepwise change in nutrition. Plant and Soil 29, 369–390 (1968).
de Wit, C. T., Dijkshoorn, W. and Noggle, J. C., Ionic balance and growth of plants. Agr. Research Rept. Wageningen 69.15, 68 pp. (1963).