Biology Department, Pahlavi University, Shiraz, Iran.
PHOSPHATE ABSORPTION BY PLANTS FROM HABITATS OF DIFFERENT PHOSPHATE STATUS
I. ABSORPTION AND INCORPORATION OF PHOSPHATE BY EXCISED ROOTS
Article first published online: 2 MAY 2006
Volume 68, Issue 1, pages 13–20, January 1969
How to Cite
NASSERY, H. and HARLEY, J. L. (1969), PHOSPHATE ABSORPTION BY PLANTS FROM HABITATS OF DIFFERENT PHOSPHATE STATUS. New Phytologist, 68: 13–20. doi: 10.1111/j.1469-8137.1969.tb06414.x
- Issue published online: 2 MAY 2006
- Article first published online: 2 MAY 2006
- (Received 10 July 1968)
In an attempt to elucidate the mechanisms involved in the differential growth response to phosphate of four ecologically distinct species, the rate of uptake and the incorporation pattern of labelled phosphate by their excised roots were investigated. No sufficiently striking or consistent difference was found in the rate of uptake or the pattern of esterification to explain their differences in response to phosphate. Calcium ions were found to stimulate uptake of phosphate by the excised roots of the four species, but neither could this effect be interpreted to explain the differential growth response to phosphate. The effect of calcium appeared to be to decrease both the permeability of, and the negative charges on, the root.