
TY  - JOUR
A1  - Johnston, M 
A1  - Grof, CPL 
A1  - Brownell, PF 
T1  - The Effect of Sodium Nutrition on the Pool Sizes of Intermediates of the C Photosynthetic Pathway
JF  - Functional Plant Biology
JO  - Functional Plant Biol.
Y1  - 1988
VL  - 15
IS  - 6
SP  - 749
EP  - 760
KW  - 
UR  - https://doi.org/10.1071/PP9880749 
N2  - Changes in C4 pathway intermediates in response to sodium nutrition, consistent with the hypothesis that there is a limitation in the conversion of pyruvate to phosphoenolpyruvate (PEP) in the mesophyll cells in sodium-deficiency, were observed in the C4 species, Kochia childsii, Chloris gayana, Amaranthus edulis, Amaranthus tricolor and Atriplex spongiosa. In the C3 species Lycopersicon esculentum (tomato), no differences were observed when grown with or without added sodium.    Of the group 1 elements, only sodium, irrespective of the salt supplied to deficient cultures, effected these changes in the C4 species.    In the light, concentrations of aspartate, PEP and 3-phosphoglycerate (3-PGA) were lower and those of pyruvate and alanine were greater in sodium-deficient than normal plants. In the dark, concentrations of aspartate, pyruvate, alanine, PEP and 3-PGA were similar in sodium-deficient and normal plants.    In the C4 species Atriplex spongiosa, the concentration of sodium required to bring about these changes corresponded to that required for growth responses.    Rapid increases in the concentrations of malate, PEP and 3-PGA and decreases in pyruvate and alanine were observed following the direct application of sodium to leaves. 
ER  -

