Fig. 3.

Alterations in different cell wall components could be integrated with cell cycle progression checkpoints. Cell wall mutants with alterations in biosynthesis or deposition of callose (A), cellulose (B), pectins (C), hemicelluloses (D), as well as seedlings under hyperosmotic stress (E) or wounded (F) activate different hormonal pathways which in turn control cell cycle progression. CK cytokinins, AUX auxins, GAs gibberellins, JA jasmonic acid, ET ethylene, SA salicylic acid, ABA abscisic acid, CDK cyclin-dependent kinase, CKI cyclin-dependent kinase inhibitor, CycD D-type cyclin