Absorption of calcium and phosphorus by excised soybean roots, var. IAC-2
DOI:
https://doi.org/10.1590/S0071-12761976000100047Abstract
This paper deals with experiments designed to study the influence of several external factors on the uptake both of Ca+² and H2PO4 - by excised soybean roots. The main conclusions are as follows: 1) Ca uptake does not follow the usual Michaelian kynetics, the evidence suggesting the operation of passive mechanism; 2) R uptake is metabolic, a single mechanism being in operation; 3) pH has a strong effect both on Ca and R absorption; 4) The use both of lower temperature (O0C) and of respiratory poisons (cyanide) inibited phosphate uptake but had no effect on calcium absorption. 5) The obsorption of Ca+2 was lowered in the presence of Mg+² but not in that of K+; nitrate ions had no detrimental or sinergistic offect on the absorption of phosphate.Downloads
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Published
1976-01-01
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Section
naodefinida
How to Cite
Malavolta, E., Souza, A., Tunin, G., Dantas, J., Aquino, B., Foloni, L., Moreira, E., Lima, F., Chaves, I., Kefalás, J., Ferreira, J., Cavalcanti, G. A., Mota, F., & Valle, E. (1976). Absorption of calcium and phosphorus by excised soybean roots, var. IAC-2 . Anais Da Escola Superior De Agricultura Luiz De Queiroz, 33, 543-554. https://doi.org/10.1590/S0071-12761976000100047