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PMID: 16658869 Published · ppublish English Journal Article

Phosphate absorption rates and adenosine 5'-triphosphate concentrations in corn root tissue.

Plant physiology ·Vol. 54 ·No. 3 ·1974-09-00 ·Pages 250-6

Lin W, Hanson JB

Abstract

The correlations between ATP concentration in corn (Zea mays) root tissue and the rate of phosphate absorption by the tissue have been examined. Experimental variation was secured with 2,4-dinitrophenol, oligomycin, mersalyl, l-ethionine, 2-deoxyglucose, N(2) gassing and inhibition of protein synthesis. It is concluded that ATP could be the energy source for potassium phosphate absorption, but only if the transport mechanism possesses certain properties: oligomycin-sensitivity; creation of a proton gradient susceptible to collapse by uncouplers; phosphate transport via a mersalyl-sensitive Pi(-)-OH(-) transporter; good activity at energy charge as low as 0.4; short enzymatic half-life for the ATPase or phosphate transporter; a linked mechanism for K(+)-H(+) exchange transport, possibly electrogenic.

Authors & Affiliations
2 authors, click to expand affiliations / ORCID
Lin W
Department of Botany, University of Illinois, Urbana, Illinois 61801.
Hanson J B
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Article Info
Journal
Plant physiology
Abbr.
Plant Physiol
ISSN
0032-0889
DOI
10.1104/pp.54.3.250
Published
1974-09-00
Pages
250-6
Language
English
Region
United States
NLM ID
0401224
PMCID
PMC367392
External Links
PubMed source DOI: 10.1104/pp.54.3.250 PMC Full Text View journal details
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