Mitogen-activated protein kinases MPK4 and MPK12 are key components mediating CO₂ -induced stomatal movements.

ABSTRACT: Respiration in leaves and the continued elevation in the atmospheric CO₂ concentration cause CO₂ -mediated reduction in stomatal pore apertures. Several mutants have been isolated for which stomatal responses to both abscisic acid (ABA) and CO₂ are simultaneously defective. However, there are only few mutations that impair the stomatal response to elevated CO₂ , but not to ABA. Such mutants are invaluable in unraveling the molecular mechanisms of early CO₂ signal transduction in guard cells. Recently, mutations in the mitogen-activated protein (MAP) kinase, MPK12, have been shown to partially impair CO₂ -induced stomatal closure. Here, we show that mpk12 plants, in which MPK4 is stably silenced specifically in guard cells (m

SUBMITTER: Toldsepp K 

PROVIDER: S-EPMC6261798 | biostudies-literature | 2018 Dec

REPOSITORIES: biostudies-literature