Unfolded protein response in cereals, a dynamic signaling pathway involved in response to environmental stresses
Résumé
Stress of the endoplasmic reticulum (ER) is induced by the accumulation of misfolded proteins in this organelle. It can be triggered by biotic and abiotic stress (particularly heat), but also by chemical treatments (such as DTT and tunicamycin) at a laboratory scale. To respond to this stress, various cellular mechanisms are involved, including the highly conserved protein repair pathway, the UPR (Unfolded Protein Response). This pathway aims to restore protein homeostasis in cells. In cereals, seed storage proteins (SSP) represent one of the characteristics that determine grain quality and are of great interest to agri culture. Unlike dicots, the dynamics of the UPR induction pathway in monocots are poorly documented in the literature. In this review, in addition to the different mechanisms involved in the protein homeostasis maintenance in response to ER stress in cereals, orthologs of UPR induction’s markers have been identified. A focus has been made on the dynamics of the UPR pathway in seedlings and in seeds under chemical UPR inducers (DTT and tunicamycine) and heat stress. The interac tions between the different actors of the UPR pathway are also reviewed and discussed.
Domaines
Sciences du Vivant [q-bio]Origine | Fichiers éditeurs autorisés sur une archive ouverte |
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