title: Banana (Musa spp.) as a model to study the meristem proteome: acclimation to osmotic stress.
abstract: Banana (Musa spp.) multiple shoot meristems are an excellent model to study the meristem proteome. Using a 2-DE protocol developed for small amounts of tissue and MS-based cross species polypeptide identification, we have revealed the meristem proteome and investigated the influence of sucrose-mediated osmotic stress in a dehydration-tolerant variety. Proteins that were significantly up- or down-regulated due to the high-sucrose treatment were classified using non-parametric univariate statistics. Our results suggest that the maintenance of an osmoprotective intracellular sucrose concentration, the enhanced expression of particular genes of the energy-conserving glycolysis and the conservation of the cell wall integrity are essential to maintain homeostasis, to acclimate and to survive dehydration. By comparing the dehydration-tolerant variety with a dehydration-sensitive variety, we were able to distinguish several genotype-specific proteins (isoforms), and could associate the dehydration-tolerant variety with proteins involved in energy metabolism (e.g., phosphoglycerate kinase, phosphoglucomutase, UDP-glucose pyrophosphorylase) and proteins that are associated with stress adaptation (e.g., OSR40-like protein, abscisic stress ripening protein-like protein). This work shows that proteome analysis can be used successfully to perform quantitative difference analysis and to characterize genetic variations in a recalcitrant crop.
authors.affiliation: Laboratory of Tropical Crop Improvement, Division of Crop Biotechnics, Department of Biosystems, Katholieke Universiteit Leuven, Leuven, Belgium. sebastien.carpentier@biw.kuleuven.be
authors.forename: Sebastien C
authors.initials: SC
authors.lastname: Carpentier
authors.forename: Erwin
authors.initials: E
authors.lastname: Witters
authors.forename: Kris
authors.initials: K
authors.lastname: Laukens
authors.forename: Harry
authors.initials: H
authors.lastname: Van Onckelen
authors.forename: Rony
authors.initials: R
authors.lastname: Swennen
authors.forename: Bart
authors.initials: B
authors.lastname: Panis
mesh_terms: D015180:Electrophoresis, Gel, Two-Dimensional; D018519:Meristem / Q000378:metabolism*; D028521:Musa / Q000378:metabolism*; D009997:Osmotic Pressure; D010940:Plant Proteins / Q000032:analysis / Q000378:metabolism*; D020543:Proteome / Q000378:metabolism*; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization
chemical_list: D010940:Plant Proteins; D020543:Proteome