Cell wall proteome analysis of Arabidopsis thaliana mature stems.
Plant stems carry flowers necessary for species propagation and need to be adapted to mechanical disturbance and environmental factors. The stem cell walls are different from other organs and can modify their rigidity or viscoelastic properties for the integrity and the robustness required to withstand mechanical impacts and environmental stresses. Plant cell wall is composed of complex polysaccharide networks also containing cell wall proteins (CWPs) crucial to perceive and limit the environmental effects. The CWPs are fundamental players in cell wall remodeling processes, and today, only 86 have been identified from the mature stems of the model plant Arabidopsis thaliana. With a destructive method, this study has enlarged its coverage to 302 CWPs. This new proteome is mainly composed of 27.5% proteins acting on polysaccharides, 16% proteases, 11.6% oxido-reductases, 11% possibly related to lipid metabolism and 11% of proteins with interacting domains with proteins or polysaccharides. Compared to stem cell wall proteomes already available (Brachypodium distachyon, Sacharum officinarum, Linum usitatissimum, Medicago sativa), that of A. thaliana stems has a higher proportion of proteins acting on polysaccharides and of proteases, but a lower proportion of oxido-reductases.
Laboratoire de Recherche en Sciences Végétales, CNRS, UPS, Université de Toulouse, Auzeville, Castanet Tolosan, France.
Harold
H
Duruflé
Laboratoire de Recherche en Sciences Végétales, CNRS, UPS, Université de Toulouse, Auzeville, Castanet Tolosan, France.
Hélène San
HS
Clemente
PAPPSO, GQE - Le Moulon, INRA, Univ. Paris-Sud, CNRS, AgroParisTech, Université Paris-Saclay, Gif-sur-Yvette, France.
Thierry
T
Balliau
PAPPSO, GQE - Le Moulon, INRA, Univ. Paris-Sud, CNRS, AgroParisTech, Université Paris-Saclay, Gif-sur-Yvette, France.
Michel
M
Zivy
Laboratoire de Recherche en Sciences Végétales, CNRS, UPS, Université de Toulouse, Auzeville, Castanet Tolosan, France.
Christophe
C
Dunand
Laboratoire de Recherche en Sciences Végétales, CNRS, UPS, Université de Toulouse, Auzeville, Castanet Tolosan, France.
Elisabeth
E
Jamet
D017360:Arabidopsis / Q000166:cytology / Q000378:metabolism*; D029681:Arabidopsis Proteins / Q000302:isolation & purification / Q000378:metabolism; D002473:Cell Wall / Q000737:chemistry / Q000378:metabolism*; D018547:Plant Stems / Q000166:cytology* / Q000378:metabolism; D020543:Proteome / Q000032:analysis* / Q000378:metabolism
D029681:Arabidopsis Proteins; D020543:Proteome
Arabidopis thaliana; Cell wall; Proteome; Stem