Effects of Humic Acid on Protein Synthesis and Ion Uptake in Beet Discs

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Abstract
Humic acids stimulate the development of phosphate uptake-capacity in beet discs during ageing under aseptic conditions without affecting phosphate uptake per se. Chloride uptake is inhibited by humic acids as is the development of chloride uptake capacity. The uptake of proline and leuoine is not influenced by ageing in humic acid. While measurements of the incorporation of these amino acids into the sub-cellular particles of discs indicate that humic acid does not affect protein synthesis in general, the stimulation of invertase development during ageing does show a definite effect on some aspect of protein synthesis.

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