title: Comparative proteomic analysis provides new insights into the fiber elongating process in cotton.
abstract: A comparative proteomic analysis was performed to explore the mechanism of cell elongation in developing cotton fibers. The temporal changes of global proteomes at five representative development stages (5-25 days post-anthesis [dpa]) were examined using 2-D electrophoresis. Among approximately 1800 stained protein spots reproducibly detected on each gel, 235 spots were differentially expressed with significant dynamics in elongating fibers. Of these, 120 spots showed a more than 2-fold change in at least one stage point, and 21 spots appeared to be specific to developmental stages. Furthermore, 106 differentially expressed proteins were identified from mass spectrometry to match 66 unique protein species. These proteins involve different cellular and metabolic processes with obvious functional tendencies toward energy/carbohydrate metabolism, protein turnover, cytoskeleton dynamics, cellular responses and redox homeostasis, indicating a good correlation between development-dependent proteins and fiber biochemical processes, as well as morphogenesis. Newly identified proteins such as phospholipase D alpha, vf14-3-3 protein, small ras-related protein, and GDP dissociation inhibitor will advance our knowledge of the complicated regulatory network. Identification of these proteins, combined with their changes in abundance, provides a global view of the development-dependent protein changes in cotton fibers, and offers a framework for further functional research of target proteins associated with fiber development.
authors.affiliation: Laboratory of Molecular Biology and MOE Laboratory of Protein Science, Department of Biological Sciences and Biotechnology, Tsinghua University, Beijing 100084, PR China.
authors.forename: Yi-Wei
authors.initials: YW
authors.lastname: Yang
authors.forename: Shao-Min
authors.initials: SM
authors.lastname: Bian
authors.forename: Yuan
authors.initials: Y
authors.lastname: Yao
authors.forename: Jin-Yuan
authors.initials: JY
authors.lastname: Liu
mesh_terms: D016000:Cluster Analysis; D032561:Cotton Fiber; D015180:Electrophoresis, Gel, Two-Dimensional; D020869:Gene Expression Profiling; D003368:Gossypium / Q000737:chemistry* / Q000235:genetics / Q000254:growth & development*; D013058:Mass Spectrometry; D010449:Peptide Mapping; D010829:Physiological Phenomena / Q000235:genetics*; D010940:Plant Proteins / Q000032:analysis / Q000235:genetics / Q000378:metabolism; D020543:Proteome / Q000032:analysis*; D013997:Time Factors
chemical_list: D010940:Plant Proteins; D020543:Proteome