Table of Contents
Volume 2011, Article ID 827250, 14 pages
Research Article

Gene Expression in Leaves of Susceptible Glycine max during Infection with Phakopsora pachyrhizi Using Next Generation Sequencing

1Soybean Genomics & Improvement Laboratory, United States Department of Agriculture-Agricultural Research Service (USDA-ARS), Beltsville, MD 20705, USA
2Department of Computer and Information Sciences, Towson University, 8000 York Road, Towson, MD 21252, USA
3Crop Genetics Research Unit, USDA-ARS, Stoneville, MS 38776, USA

Received 19 July 2011; Revised 4 November 2011; Accepted 7 November 2011

Academic Editor: Alfredo Ciccodicola

Copyright © 2011 Arianne Tremblay 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 rust is caused by the obligate biotrophic fungus Phakopsora pachyrhizi, an exotic pathogen causing important yield losses in soybean production. We used an mRNA-Seq strategy to analyze the expression pattern of soybean genes and better understand molecular events occurring in soybean following the infection. cDNA libraries were constructed from RNA isolated from whole infected soybean leaves 10 days after inoculation with P. pachyrhizi and sequenced using an Illumina platform to identify soybean genes that are affected by pathogen growth. We obtained 15 million sequences corresponding to soybean genes. Forty-two percent of the genes were downregulated including genes encoding proteins involved in amino acid metabolism, carbohydrate metabolism, and transport facilitation; 31% were upregulated including genes encoding proteins involved in lipid metabolism, glycan biosynthesis, and signal transduction. Candidate host genes identified in this study will be manipulated to assay their potential to control soybean rust disease.