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Journal of Experimental Botany 2009 60(5):1409-1425; doi:10.1093/jxb/erp084
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© The Author [2009]. Published by Oxford University Press [on behalf of the Society for Experimental Biology]. All rights reserved. For Permissions, please e-mail: journals.permissions@oxfordjournals.org

This article appears in the following Journal of Experimental Botany issue: Special Issue: Perspectives on Plant Development [View the issue table of contents]

RESEARCH PAPER

A strong effect of growth medium and organ type on the identification of QTLs for phytate and mineral concentrations in three Arabidopsis thaliana RIL populations

Artak Ghandilyan1, Nadine Ilk2, Corrie Hanhart1, Malick Mbengue1, Luis Barboza1, Henk Schat3, Maarten Koornneef1,2, Mohamed El-Lithy1,4 *, Dick Vreugdenhil4, Matthieu Reymond2 and Mark G. M. Aarts1,{dagger}

1Laboratory of Genetics, Wageningen University, Arboretumlaan 4, 6703 BD Wageningen, The Netherlands
2Max-Planck-Institute for Plant Breeding Research, Carl-von-Linné-Weg 10, D-50829 Köln, Germany
3Ecology and Physiology of Plants, Faculty of Biology, Vrije Universiteit, De Boelelaan 1085, 1081 HV Amsterdam, The Netherlands
4Laboratory of Plant Physiology, Wageningen University, Arboretumlaan 4, 6703 BD Wageningen, The Netherlands

{dagger} To whom correspondence should be addressed: E-mail: mark.aarts{at}wur.nl

The regulation of mineral accumulation in plants is genetically complex, with several genetic loci involved in the control of one mineral and loci affecting the accumulation of different minerals. To investigate the role of growth medium and organ type on the genetics of mineral accumulation, two existing (LerxKond, LerxAn-1) and one new (LerxEri-1) Arabidopsis thaliana Recombinant Inbred Line populations were raised on soil and hydroponics as substrates. Seeds, roots, and/or rosettes were sampled for the determination of their Ca, Fe, K, Mg, Mn, P or Zn concentrations. For seeds only, the concentration of phytate (IP6), a strong chelator of seed minerals, was determined. Correlations between minerals/IP6, populations, growth conditions, and organs were determined and mineral/IP6 concentration data were used to identify quantitative trait loci (QTLs) for these traits. A striking difference was found between QTLs identified for soil-grown versus hydroponics-grown populations and between QTLs identified for different plant organs. Three common QTLs were identified for several populations, growth conditions, and organs, one of which corresponded to the ERECTA locus, variation of which has a strong effect on plant morphology.

* Present address: Menoufiya University, Botany Department, Faculty of Science, Shebin El-Kom, Menoufiya (province), Egypt.

Received 4 February 2009; Revised 20 February 2009 Accepted 25 February 2009


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