Dissecting the proteome of pea mature seeds reveals the phenotypic plasticity of seed protein composition.
Pea (Pisum sativum L.) is the most cultivated European pulse crop and the pea seeds mainly serve as a protein source for monogastric animals. Because the seed protein composition impacts on seed nutritional value, we aimed at identifying the determinants of its variability. This paper presents the first pea mature seed proteome reference map, which includes 156 identified proteins (http://www.inra.fr/legumbase/peaseedmap/). This map provides a fine dissection of the pea seed storage protein composition revealing a large diversity of storage proteins resulting both from gene diversity and post-translational processing. It gives new insights into the pea storage protein processing (especially 7S globulins) as a possible adaptation towards progressive mobilization of the proteins during germination. The nonstorage seed proteome revealed the presence of proteins involved in seed defense together with proteins preparing germination. The plasticity of the seed proteome was revealed for seeds produced in three successive years of cultivation, and 30% of the spots were affected by environmental variations. This work pinpoints seed proteins most affected by environment, highlighting new targets to stabilize storage protein composition that should be further analyzed.
Bourgeois
Michael
M
Unité Mixte de Recherche en Génétique et Ecophysiologie des Légumineuses à Graines, Institut National de la Recherche Agronomique, Bretenières, France. michael.bourgeois@epoisses.inra.fr
Jacquin
Françoise
F
Savois
Vincent
V
Sommerer
Nicolas
N
Labas
Valérie
V
Henry
Céline
C
Burstin
Judith
J
D000704:Analysis of Variance; D015180:Electrophoresis, Gel, Two-Dimensional; D004777:Environment; D018506:Gene Expression Regulation, Plant / Q000502:physiology*; D018532:Pisum sativum / Q000378:metabolism* / Q000502:physiology; D010641:Phenotype; D010940:Plant Proteins / Q000032:analysis / Q000378:metabolism; D020543:Proteome / Q000737:chemistry; D040901:Proteomics; D055314:Seed Storage Proteins / Q000032:analysis / Q000737:chemistry* / Q000378:metabolism; D012639:Seeds / Q000737:chemistry*; D000097793:Legumins
D010940:Plant Proteins; D020543:Proteome; D055314:Seed Storage Proteins; D000097793:Legumins; C029781:CVC protein, Pisum sativum; C015575:vicilin protein, plant