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International Journal of Plant Genomics
Volume 2010 (2010), Article ID 164862, 13 pages
Research Article

Identification of Aluminum Responsive Genes in Al-Tolerant Soybean Line PI 416937

1Department of Natural Resources and Environmental Sciences, Alabama A&M University, Normal, AL 35762, USA
2Biostatistics and Bioinformatics Unit, Comprehensive Cancer Center, Division of Preventive Medicine, Department of Medicine, The University of Alabama at Birmingham, Birmingham, AL 35294-3300, USA
3School of Medicine, Clinical and Translational Institute, West Virginia University, HSC-RM-5523, Morgantown, WV 26506-9161, USA

Received 20 April 2010; Revised 16 July 2010; Accepted 7 August 2010

Academic Editor: Akhilesh Kumar Tyagi

Copyright © 2010 Dechassa Duressa et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Soybean is one of the most aluminum (Al) sensitive plants. The complex inheritance of Al tolerance trait has so far undermined breeding efforts to develop Al-tolerant soybeans. Discovering the genetic factors underlying the Al tolerance mechanisms would undoubtedly accelerate the pace of such endeavor. As a first step toward this goal, we analyzed the transcriptome profile in roots of Al-tolerant soybean line PI 416937 comparing Al-treated and untreated control plants using DNA microarrays. Many genes involved in transcription activation, stress response, cell metabolism and signaling were differentially expressed. Patterns of gene expression and mechanisms of Al toxicity and tolerance suggest that Cys2His2 and ADR6 transcription activators, cell wall modifying enzymes, and phytosulfokines growth factor play role in soybean Al tolerance. Our data provide insights into the molecular mechanisms of soybean Al tolerance and will have practical value in genetic improvement of Al tolerance trait.