Cellulose-binding domains: cellulose associated-defensive sensing partners?
The cellulose-binding domains (CBDs) in the Phytophthora cellulose-binding elicitor lectin (CBEL) are potent elicitors of plant defence responses. Induction of defence has also been reported in various cellulose-deficient mutants of Arabidopsis thaliana. Based on these observations, we propose a model linking cellulose alteration to defence induction. This integrates the fast increase in cytosolic calcium recorded in response to CBEL, mechano-stimulated calcium uptake mechanisms, and proteins that interact functionally with the cellulose synthase complex. In this context, CBDs emerge as new tools to decipher the signalling cascades that result from cell wall-cellulose perturbations.
Dumas
Bernard
B
Unité Mixte de Recherche 5546 Centre National de la Recherche Scientifique-Université Paul Sabatier Toulouse III, Pôle de Biotechnologie Végétale, 24 Chemin de Borde-Rouge, BP42617 Auzeville, 31326 Castanet-Tolosan, France.
Bottin
Arnaud
A
Gaulin
Elodie
E
Esquerré-Tugayé
Marie-Thérèse
MT
D020418:Algal Proteins / Q000378:metabolism*; D001665:Binding Sites; D002473:Cell Wall / Q000378:metabolism / Q000382:microbiology; D002482:Cellulose / Q000378:metabolism*; D008954:Models, Biological; D010838:Phytophthora / Q000378:metabolism*; D010944:Plants / Q000378:metabolism / Q000382:microbiology; D011485:Protein Binding; D015398:Signal Transduction
D020418:Algal Proteins; D002482:Cellulose