Show simple item record

dc.contributor.authorAndres-Borderia, Amparo
dc.contributor.authorAndres, Fernando
dc.contributor.authorGarcia-Molina, Antoni
dc.contributor.authorPerea-Garcia, Ana
dc.contributor.authorDomingo, Concha
dc.contributor.authorPuig, Sergi
dc.contributor.authorPenarrubia, Lola
dc.date.accessioned2018-05-09T16:30:55Z
dc.date.available2018-05-09T16:30:55Z
dc.date.issued2017
dc.identifier.citationAndres-Borderia, A., Andres, F., Garcia-Molina, A., Perea-Garcia, A., Domingo, C., Puig, S., Penarrubia, L. (2017). Copper and ectopic expression of the arabidopsis transport protein COPT1 alter iron homeostasis in rice (oryza sativa L.). Plant Molecular Biology, 95(1-2), 17-32.
dc.identifier.issn0167-4412
dc.identifier.urihttp://hdl.handle.net/20.500.11939/6019
dc.description.abstractCopper deficiency and excess differentially affect iron homeostasis in rice and overexpression of the Arabidopsis high-affinity copper transporter COPT1 slightly increases endogenous iron concentration in rice grains. Higher plants have developed sophisticated mechanisms to efficiently acquire and use micronutrients such as copper and iron. However, the molecular mechanisms underlying the interaction between both metals remain poorly understood. In the present work, we study the effects produced on iron homeostasis by a wide range of copper concentrations in the growth media and by altered copper transport in Oryza sativa plants. Gene expression profiles in rice seedlings grown under copper excess show an altered expression of genes involved in iron homeostasis compared to standard control conditions. Thus, ferritin OsFER2 and ferredoxin OsFd1 mRNAs are down-regulated whereas the transcriptional iron regulator OsIRO2 and the nicotianamine synthase OsNAS2 mRNAs rise under copper excess. As expected, the expression of OsCOPT1, which encodes a high-affinity copper transport protein, as well as other copper-deficiency markers are down-regulated by copper. Furthermore, we show that Arabidopsis COPT1 overexpression (C1(OE) ) in rice causes root shortening in high copper conditions and under iron deficiency. C1(OE) rice plants modify the expression of the putative iron-sensing factors OsHRZ1 and OsHRZ2 and enhance the expression of OsIRO2 under copper excess, which suggests a role of copper transport in iron signaling. Importantly, the C1(OE) rice plants grown on soil contain higher endogenous iron concentration than wild-type plants in both brown and white grains. Collectively, these results highlight the effects of rice copper status on iron homeostasis, which should be considered to obtain crops with optimized nutrient concentrations in edible parts.
dc.language.isoen
dc.rightsAtribución-NoComercial-SinDerivadas 3.0 España*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/*
dc.titleCopper and ectopic expression of the Arabidopsis transport protein COPT1 alter iron homeostasis in rice (Oryza sativa L.)
dc.typearticle
dc.entidadIVIACentro de Genómica
dc.identifier.doi10.1007/s11103-017-0622-8
dc.identifier.url
dc.journal.abbreviatedTitlePlant Mol.Biol.
dc.journal.issueNumber1-2
dc.journal.titlePlant Molecular Biology
dc.journal.volumeNumber95
dc.page.final32
dc.page.initial17
dc.source.typeelectronico


Files in this item

FilesSizeFormatView

There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record

Atribución-NoComercial-SinDerivadas 3.0 España
Except where otherwise noted, this item's license is described as Atribución-NoComercial-SinDerivadas 3.0 España