title: Proteomics study of changes in soybean lines resistant and sensitive to Phytophthora sojae.
abstract: BACKGROUND
  Phytophthora sojae causes soybean root and stem rot, resulting in an annual loss of 1-2 billion US dollars in soybean production worldwide. A proteomic technique was used to determine the effects on soybean hypocotyls of infection with P. sojae.
  
  
  RESULTS
  In the present study, 46 differentially expressed proteins were identified in soybean hypocotyls infected with P. sojae, using two-dimensional electrophoresis and matrix-assisted laser desorption/ionization tandem time of flight (MALDI-TOF/TOF). The expression levels of 26 proteins were significantly affected at various time points in the tolerant soybean line, Yudou25, (12 up-regulated and 14 down-regulated). In contrast, in the sensitive soybean line, NG6255, only 20 proteins were significantly affected (11 up-regulated and 9 down-regulated). Among these proteins, 26% were related to energy regulation, 15% to protein destination and storage, 11% to defense against disease, 11% to metabolism, 9% to protein synthesis, 4% to secondary metabolism, and 24% were of unknown function.
  
  
  CONCLUSIONS
  Our study provides important information on the use of proteomic methods for studying protein regulation during plant-oomycete interactions.
authors: National Center for Soybean Improvement, National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, P.R. China.
authors: YuMei
authors: Y
authors: Zhang
authors: National Center for Soybean Improvement, National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, P.R. China.
authors: JinMing
authors: J
authors: Zhao
authors: Guizhou Rapeseed Institute, Guizhou Academy of Agricultural Sciences, Guiyang 550008, P.R.China.
authors: Yang
authors: Y
authors: Xiang
authors: National Center for Soybean Improvement, National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, P.R. China.
authors: XiaoChun
authors: X
authors: Bian
authors: National Center for Soybean Improvement, National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, P.R. China.
authors: QiaoMei
authors: Q
authors: Zuo
authors: Guizhou Rapeseed Institute, Guizhou Academy of Agricultural Sciences, Guiyang 550008, P.R.China.
authors: Qi
authors: Q
authors: Shen
authors: National Center for Soybean Improvement, National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, P.R. China.
authors: JunYi
authors: J
authors: Gai
authors: National Center for Soybean Improvement, National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, P.R. China.
authors: Han
authors: H
authors: Xing