Abstract
Two metabolic mechanisms providing the mechanisms for attracting nutrient ions from the soil solution and their subsequent uptake at specific rates and ratios during the individual phases of development of the plant were assessed. One of these mechanisms which acted by excreting protons (H+), was located in the leaves and presumably represented an auxin-dependent proton pump. The other, acted by excreting negatively charged ions (OH−, HCO −3 ) and was located in the root. Up to the bud-formation stage it functioned on the basis of NO −3 reduction in the root cells, but later through the transport of negative charge, in the form of carboxylates, from the leaves.
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Mitreva, N.I. Physiological interaction model of sunflower plant with its nutrient medium during ontogenesis. Plant Soil 115, 29–34 (1989). https://doi.org/10.1007/BF02220691
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DOI: https://doi.org/10.1007/BF02220691