title: Comparative proteome analysis of metabolic proteins from seeds of durum wheat (cv. Svevo) subjected to heat stress.
abstract: In Central and Southern Italy, where durum wheat represents one of the most widely cultivated crops, grain filling occurs during Spring, a period characterized by sudden increases in temperature. Wheat grain proteins are classified into albumins, globulins, and prolamins. The nonprolamin fractions include proteins with metabolic activity or structural function. In order to investigate the consequences of heat stress on the accumulation of nonprolamin proteins in mature durum wheat kernels, the Italian cultivar Svevo was subjected to two thermal regimes (heat stress versus control). The 2-D patterns of nonprolamin proteins were monitored to identify polypeptides affected by heat stress during grain fill. This study shows that heat stress alters significantly the durum wheat seed proteome, although the changes range is only between 1.2- and 2.2-fold. This analysis revealed 132 differentially expressed polypeptides, 47 of which were identified by MALDI-TOF and MALDI-TOF-TOF MS and included HSPs, proteins involved in the glycolysis and carbohydrate metabolism, as well as stress-related proteins. Many of the heat-induced polypeptides are considered to be allergenic for sensitive individuals.
authors.affiliation: Department of Agrobiology and Agrochemistry, University of Tuscia, Viterbo, Italy.
authors.forename: Paolo
authors.initials: P
authors.lastname: Laino
authors.forename: Dale
authors.initials: D
authors.lastname: Shelton
authors.forename: Christine
authors.initials: C
authors.lastname: Finnie
authors.forename: Anna Maria
authors.initials: AM
authors.lastname: De Leonardis
authors.forename: Anna Maria
authors.initials: AM
authors.lastname: Mastrangelo
authors.forename: Birte
authors.initials: B
authors.lastname: Svensson
authors.forename: Domenico
authors.initials: D
authors.lastname: Lafiandra
authors.forename: Stefania
authors.initials: S
authors.lastname: Masci
mesh_terms: D015180:Electrophoresis, Gel, Two-Dimensional; D018506:Gene Expression Regulation, Plant; D006358:Hot Temperature; D010940:Plant Proteins / Q000378:metabolism*; D020543:Proteome / Q000032:analysis*; D012639:Seeds / Q000378:metabolism*; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization; D013312:Stress, Physiological; D014908:Triticum / Q000378:metabolism*
chemical_list: D010940:Plant Proteins; D020543:Proteome