Zinc deficiency up-regulates expression of high-affinity phosphate transporter genes in both phosphate-sufficient and -deficient barley roots

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dc.contributor.authorHuang, C.
dc.contributor.authorBarker, S.
dc.contributor.authorLangridge, P.
dc.contributor.authorSmith, F.
dc.contributor.authorGraham, R.
dc.date.issued2000
dc.description.abstractPhosphate (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.
dc.description.statementofresponsibilityChunyuan Huang, Susan Jane Barker, Peter Langridge, Frank W. Smith, and Robin David Graham
dc.identifier.citationPlant Physiology, 2000; 124(1):415-422
dc.identifier.doi10.1104/pp.124.1.415
dc.identifier.issn0032-0889
dc.identifier.issn1532-2548
dc.identifier.orcidLangridge, P. [0000-0001-9494-400X]
dc.identifier.urihttp://hdl.handle.net/2440/13543
dc.language.isoen
dc.publisherAmer Soc Plant Physiologists
dc.rightsCopyright © 2000 American Society of Plant Physiologists
dc.source.urihttp://www.plantphysiol.org/cgi/content/abstract/124/1/415
dc.subjectHordeum
dc.subjectPlant Roots
dc.subjectPhosphates
dc.subjectManganese
dc.subjectZinc
dc.subjectPhosphorus
dc.subjectEdetic Acid
dc.subjectCarrier Proteins
dc.subjectPhosphate-Binding Proteins
dc.subjectMembrane Proteins
dc.subjectSoil
dc.subjectChelating Agents
dc.subjectSignal Transduction
dc.subjectGene Expression Regulation, Plant
dc.subjectUp-Regulation
dc.titleZinc deficiency up-regulates expression of high-affinity phosphate transporter genes in both phosphate-sufficient and -deficient barley roots
dc.typeJournal article
pubs.publication-statusPublished

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