Studying the amino acid absorption by higher plants we observed a stimulation of 14C‐alanine absorption by wheat roots preloaded with inactive alanine. Within the limits of concentration examined the increase of stimulation is more likely to depend on the free alanine content of the roots than on the alanine concentration of the solutions used for pretreatment. The stimulation is retained even after incubating the pretreated roots in diluted CaSO4 solution before the uptake period. Besides the alanine only the glycine gave stimulation, while pretreatment with valine, arginine or aspartic acid gave an inhibition. (The aspartic acid is likely to cause a general rise in the permeability of cells.) We suppose that the phenomenon of flow driven by counterflow is likely to serve as an explanation to the stimulatory preloading effect observed in the alanine absorption by wheat roots.
|Number of pages||8|
|Publication status||Published - 1967|
ASJC Scopus subject areas
- Plant Science
- Cell Biology