a coastal cline in sodium accumulation in arabidopsis thaliana is driven by natural variation of the sodium transporter athkt1;1沿海cline钠积累在拟南芥是由钠离子转运体的自然变异athkt1;1.pdfVIP

A Coastal Cline in Sodium Accumulation in Arabidopsis thaliana Is Driven by Natural Variation of the Sodium Transporter AtHKT1;1 1. 2. 3 4 2 2 5 Ivan Baxter , Jessica N. Brazelton , Danni Yu , Yu S. Huang , Brett Lahner , Elena Yakubova , Yan Li , 5 5 6 3 2 Joy Bergelson , Justin O. Borevitz , Magnus Nordborg , Olga Vitek , David E. Salt * 1 United States Department of Agriculture–Agricultural Research Service, Plant Genetics Research Unit, Donald Danforth Plant Sciences Center, St. Louis, Missouri, United States of America, 2 Department of Horticulture and Landscape Architecture, Purdue University, West Lafayette, Indiana, United States of America, 3 Department of Statistics, Purdue University, West Lafayette, Indiana, United States of America, 4 Molecular and Computational Biology, University of Southern California, Los Angeles, California, United States of America, 5 Department of Ecology and Evolution, University of Chicago, Chicago, Illinois, United States of America, 6 Gregor Mendel Institute of Molecular Plant Biology, Austrian Academy of Sciences, Vienna, Austria Abstract The genetic model plant Arabidopsis thaliana, like many plant species, experiences a range of edaphic conditions across its natural habitat. Such heterogeneity may drive local adaptation, though the molecular genetic basis remains elusive. Here, we describe a study in which we used genome-wide association mapping, genetic complementation, and gene expression studies to identify cis-regulatory expression level polymorphisms at the AtHKT1;1 locus, encoding a known sodium (Na+) transporter, as being a major factor con