Calcium-dependent protein kinase OsCPK10 mediates both drought tolerance and blast disease resistance in rice plants
Bundó Barberà, Mireia (Centre de Recerca en Agrigenòmica)
Coca López, María (Centre de Recerca en Agrigenòmica)

Data:	2017
Resum:	OsCPK10 mediates drought tolerance and blast disease resistance in rice plants by enhancing their reactive oxygen species scavenging capacity and so reducing oxidative damage associated with both stresses. Plant growth and productivity is negatively affected by different stresses. Most stresses trigger calcium signals that initiate acclimation responses in plants. The multigene family of plant calcium-dependent protein kinases (CPKs) functions in multiple stress responses by transducing calcium signals into phosphorylation events. This work reports that the OsCPK10 isoform positively mediates tolerance to different stresses in rice plants by enhancing their antioxidant capacity and protecting them from reactive oxygen species (ROS) damage, with the uncontrolled generation of ROS being a common feature of these stresses. Here, we show that the constitutive accumulation of an HA-tagged OsCPK10 full-length protein enhances the hydrogen peroxide detoxifying capacity of rice plants during desiccation. This is achived by modulating the accumulation of catalase proteins, which reduces the extent of lipid peroxidation and protects the integrity of cell membranes, resulting in drought tolerance. OsCPK10HA accumulation also confers blast disease resistance by interfering with fungal necrotrophic growth via a reduction in the accumulation of hydrogen peroxide. Furthermore, we show by bimolecular complementation assays that OsCPK10 is a plasma membrane protein that physically interacts in vivo with catalase A. OsCPK10 therefore appears to be a good molecular target to improve tolerance to abiotic stresses as well as to blast disease, which limit rice crop productivity.
Ajuts:	Ministerio de Ciencia e Innovación BIO2009-08719 Ministerio de Economía y Competitividad BIO2012-32838 Ministerio de Economía y Competitividad BIO2015-68790-C2-2-R Ministerio de Economía y Competitividad SEV-2015-0533
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Matèria:	Blast disease ; Calcium-dependent protein kinases ; Catalase ; Drought ; Oxidative damage ; Rice ; ROS
Publicat a:	Journal of experimental botany, Vol. 68, Num. 11 (May 2017) , p. 2963-2975, ISSN 1460-2431

DOI: 10.1093/jxb/erx145
PMID: 28472292

13 p, 2.8 MB

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