Please use this identifier to cite or link to this item:
Scopus Web of Science® Altmetric
Type: Journal article
Title: Zinc deficiency up-regulates expression of high-affinity phosphate transporter genes in both phosphate-sufficient and -deficient barley roots
Author: Huang, C.
Barker, S.
Langridge, P.
Smith, F.
Graham, R.
Citation: Plant Physiology, 2000; 124(1):415-422
Publisher: Amer Soc Plant Physiologists
Issue Date: 2000
ISSN: 0032-0889
Statement of
Chunyuan Huang, Susan Jane Barker, Peter Langridge, Frank W. Smith, and Robin David Graham
Abstract: Phosphate (P) is taken up by plants through high-affinity P transporter proteins embedded in the plasma membrane of certain cell types in plant roots. Expression of the genes that encode these transporters responds to the P status of the plants, and their transcription is normally tightly controlled. However, this tight control of P uptake is lost under Zn deficiency, leading to very high accumulation of P in plants. We examined the effect of plant Zn status on the expression of the genes encoding the HVPT1 and HVPT2 high-affinity P transporters in barley (Hordeum vulgare L. cv Weeah) roots. The results show that the expression of these genes is intimately linked to the Zn status of the plants. Zn deficiency induced the expression of genes encoding these P transporters in plants grown in either P-sufficient or -deficient conditions. Moreover, the role of Zn in the regulation of these genes is specific in that it cannot be replaced by manganese (a divalent cation similar to Zn). It appears that Zn plays a specific role in the signal transduction pathway responsible for the regulation of genes encoding high-affinity P transporters in plant roots. The significance of Zn involvement in the regulation of genes involved in P uptake is discussed.
Keywords: Hordeum
Plant Roots
Edetic Acid
Carrier Proteins
Phosphate-Binding Proteins
Membrane Proteins
Chelating Agents
Signal Transduction
Gene Expression Regulation, Plant
Rights: Copyright © 2000 American Society of Plant Physiologists
DOI: 10.1104/pp.124.1.415
Published version:
Appears in Collections:Agriculture, Food and Wine publications
Aurora harvest 2

Files in This Item:
There are no files associated with this item.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.