title: Stress-related genes distinctly expressed in unfertilized wheat ovaries under both normal and water deficit conditions whereas differed in fertilized ovaries.
abstract: In this study, a proteomic approach was utilized to identify differentially accumulated proteins in developing wheat ovaries before and after fertilization and in response to water deficit. Proteins were extracted, quantified, and resolved by 2-DE at pH4-7. Statistical analysis of spot intensity was performed by using principal component analysis and samples were clustered by using Euclidean distance. In total, 136 differentially accumulated protein spots representing 88 unique proteins were successfully identified by MALDI-TOF/TOF MS. Under normal conditions, stress-related proteins were abundant in unfertilized ovaries while proteins involved in the metabolism of energy and matter were enriched in fertilized ovaries just 48h after fertilization. Similar trends were observed in unfertilized and fertilized wheat ovaries under water deficit conditions, except for increased accumulation of stress-related proteins in fertilized ovaries. Some proteins required for normal development were not present in ovaries subjected to water deficit. Our comprehensive results provide new insights into the biochemical mechanisms involved in ovary development before and after fertilization and in tolerance to water deficit.
  
  
  CONCLUSIONS
  Fertilization initiates the most dramatic changes that occur in the life cycle of higher plants; research into differences in gene expression before and after ovary pollination can make a substantial contribution to understanding the physiological and biochemical processes associated with fertilization. To date, a small number of studies have examined changes in transcriptional activity of the developing plant embryo sac before and after fertilization. However, comparative proteomic analysis of wheat ovary development before and after fertilization, and in response to water deficit, has not yet been reported. Our comprehensive results provide new insights into the biochemical mechanisms involved in ovary development before and after fertilization and in tolerance to water deficit.
authors.affiliation: College of Life Sciences, Capital Normal University, Beijing 100048, China. Electronic address: yajuanqin2013@gmail.com.
authors.forename: Yajuan
authors.initials: Y
authors.lastname: Qin
authors.affiliation: College of Life Sciences, Capital Normal University, Beijing 100048, China. Electronic address: songwanlu118@gmail.com.
authors.forename: Wanlu
authors.initials: W
authors.lastname: Song
authors.affiliation: College of Life Sciences, Capital Normal University, Beijing 100048, China. Electronic address: susanshaw@Yeah.net.
authors.forename: Shuyang
authors.initials: S
authors.lastname: Xiao
authors.affiliation: College of Life Sciences, Capital Normal University, Beijing 100048, China. Electronic address: yinguangjundejia@gmail.com.
authors.forename: Guangjun
authors.initials: G
authors.lastname: Yin
authors.affiliation: College of Life Sciences, Capital Normal University, Beijing 100048, China. Electronic address: zhuyan8945@126.com.
authors.forename: Yan
authors.initials: Y
authors.lastname: Zhu
authors.affiliation: College of Life Sciences, Capital Normal University, Beijing 100048, China. Electronic address: yanym2004@163.com.
authors.forename: Yueming
authors.initials: Y
authors.lastname: Yan
authors.affiliation: College of Life Sciences, Capital Normal University, Beijing 100048, China. Electronic address: yingkaohu@yahoo.com.
authors.forename: Yingkao
authors.initials: Y
authors.lastname: Hu
mesh_terms: D016000:Cluster Analysis; D055864:Droughts; D015180:Electrophoresis, Gel, Two-Dimensional; D035264:Flowers / Q000378:metabolism*; D020869:Gene Expression Profiling; D018506:Gene Expression Regulation, Plant; D006706:Homeostasis; D006863:Hydrogen-Ion Concentration; D013058:Mass Spectrometry; D015999:Multivariate Analysis; D010084:Oxidation-Reduction; D010940:Plant Proteins / Q000378:metabolism; D025341:Principal Component Analysis; D020543:Proteome / Q000378:metabolism; D040901:Proteomics; D015398:Signal Transduction; D012987:Soil; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization; D013312:Stress, Physiological; D014908:Triticum / Q000378:metabolism*; D014867:Water / Q000737:chemistry*
chemical_list: D010940:Plant Proteins; D020543:Proteome; D012987:Soil; D014867:Water
keywords: Differentially abundant proteins; Fertilization; Proteome; Water deficit; Wheat ovary