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- Title
Uptake of Phosphate and Sulphate by Wheat Roots at Low Temperature.
- Authors
Butler, G. W.
- Abstract
The uptake of P32-phosphate and S35-sulphate by excised wheat roots at 1° has been examined over a range of concentrations from 2×10-5 M to 2×10-2 M for periods up to 130 minutes. (1) The results at higher concentrations of both sulphate and phosphate were consistent with an "apparent free space" of 18-20 per cent for normal roots. For phosphate-deficient roots, the "apparent free space" was 36 per cent. (2) Whereas the uptake of labelled sulphate was nearly independent of carrier sulphate concentration over the entire range, the uptake of labelled phosphate was markedly greater with reduction in carrier concentration. 5×10-4 M dinitrophenol reduced hut did not abolish this effect, which was concluded to arise from a complex of mechanism. Further work is required to establish the relative contributions of adsorption exchange and esterification, in particular.
- Subjects
WHEAT; PLANT roots; PHOSPHATES; SULFATES; PLANT physiology; ADSORPTION (Chemistry)
- Publication
Physiologia Plantarum, 1959, Vol 12, Issue 4, p917
- ISSN
0031-9317
- Publication type
Article
- DOI
10.1111/j.1399-3054.1959.tb08926.x