
%0 Journal Article
%A Mckee, HS 
%A E Urbach, Gerda 
%T The Physiology of Growth in Apple Fruits V. Soluble Nitrogen Constituents
%J Australian Journal of Biological Sciences
%D 1953/09/01
%V 6
%N 3
%P 369-378
%K 
%R https://doi.org/10.1071/BI9530369
%U https://www.publish.csiro.au/paper/BI9530369 
%X The ninhydrin-reacting compounds of the apple fruit have been studied during its development on the tree. The compounds present show little variation, but glutamine, conspicuous in very young and in over-mature apples, disappears at intermediate stages. The increase in soluble nitrogenous compounds occurring in over-mature apples left on the tree (Pearson and Robertson 1953) is confirmed qualitatively. An account is given of the chromatographic behaviour of several unidentified ninhydrin-reacting substances found in extracts of apple fruits, leaves, and stems. 
