Publications by authors named "Kerri Hunter"

Article Synopsis
  • Stomatal closure in plants is triggered by biotic and abiotic stresses, with calcium ions playing a key role in this response.
  • The Ca-permeable channel OSCA1.3 in Arabidopsis thaliana is identified as crucial for stomatal closure during immune signaling, specifically phosphorylated by the kinase BIK1 upon pathogen detection.
  • OSCA1.3 enhances Ca channel activity through BIK1 phosphorylation, highlighting different mechanisms for Ca influx in response to biotic threats versus the plant hormone abscisic acid associated with abiotic stresses.
View Article and Find Full Text PDF
Article Synopsis
  • Reactive oxygen species (ROS) play a critical role as signaling molecules in plants, and their production is regulated through specific signaling pathways involving receptor-like protein kinases.
  • The CYSTEINE-RICH RLK2 (CRK2) kinase is essential for plant growth and forms a complex with the NADPH oxidase RBOHD, which is necessary for an effective ROS response to pathogens.
  • CRK2's role in phosphorylating RBOHD at specific sites enhances ROS production and supports plant immunity, suggesting that this regulatory mechanism may be evolutionarily conserved across different species.
View Article and Find Full Text PDF

High salinity is an increasingly prevalent source of stress to which plants must adapt. The receptor-like protein kinases, including members of the Cys-rich receptor-like kinase (CRK) subfamily, are a highly expanded family of transmembrane proteins in plants that are largely responsible for communication between cells and the extracellular environment. Various CRKs have been implicated in biotic and abiotic stress responses; however, their functions on a cellular level remain largely uncharacterized.

View Article and Find Full Text PDF

Reactive oxygen species (ROS)-dependent signaling pathways from chloroplasts and mitochondria merge at the nuclear protein RADICAL-INDUCED CELL DEATH1 (RCD1). RCD1 interacts in vivo and suppresses the activity of the transcription factors ANAC013 and ANAC017, which mediate a ROS-related retrograde signal originating from mitochondrial complex III. Inactivation of leads to increased expression of mitochondrial dysfunction stimulon (MDS) genes regulated by ANAC013 and ANAC017.

View Article and Find Full Text PDF

In plants, receptor-like kinases (RLKs) and extracellular reactive oxygen species (ROS) contribute to the communication between the environment and the interior of the cell. Apoplastic ROS production is a frequent result of RLK signaling in a multitude of cellular processes; thus, by their nature, these two signaling components are inherently linked. However, it is as yet unclear how ROS signaling downstream of receptor activation is executed.

View Article and Find Full Text PDF

Cysteine-rich receptor-like kinases (CRKs) are transmembrane proteins characterized by the presence of two domains of unknown function 26 (DUF26) in their ectodomain. The CRKs form one of the largest groups of receptor-like protein kinases in plants, but their biological functions have so far remained largely uncharacterized. We conducted a large-scale phenotyping approach of a nearly complete crk T-DNA insertion line collection showing that CRKs control important aspects of plant development and stress adaptation in response to biotic and abiotic stimuli in a non-redundant fashion.

View Article and Find Full Text PDF

Fluoxetine is used as a therapeutic agent for autism spectrum disorder (ASD), including Fragile X syndrome (FXS). The treatment often associates with disruptive behaviors such as agitation and disinhibited behaviors in FXS. To identify mechanisms that increase the risk to poor treatment outcome, we investigated the behavioral and cellular effects of fluoxetine on adult Fmr1 knockout (KO) mice, a mouse model for FXS.

View Article and Find Full Text PDF