Products of Orthophosphate Absorption by Barley Roots
- 1 May 1960
- journal article
- research article
- Published by Oxford University Press (OUP) in Plant Physiology
- Vol. 35 (3), 326-332
- https://doi.org/10.1104/pp.35.3.326
Abstract
Eighty to 90% of the orthophosphate absorbed by excised barley roots in 15 seconds to 2 hours is incorporated into 5 compounds. Kinetic studies show that all 5 are products of the rate-limiting absorption step. The earliest compounds in sequence of incorporation are uridine diphosphate glucose (UDPG), glucose-1-phosphate (G-l-P) and inorganic phosphate (Pi). Four of the compounds, UDPG, G-l-P and 2 unknowns arise from absorption through 1 site which appears to be linked to the cytochrome b site of phosphorylation in the respiratory chain. Pi is a product of absorption through another site and is apparently linked to diphosphopyridine nucleotide.This publication has 8 references indexed in Scilit:
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