Remodelling of Cytoskeleton and Plasma Membrane Proteins Contributes to Drought Sensitivity of Arabidopsis Rhd2 Mutant

The study "Remodelling of cytoskeleton and plasma membrane proteins contributes to drought sensitivity of Arabidopsis rhd2 mutant" investigates the role of the NADPH oxidase enzyme, specifically AtRBOHC/RHD2, in Arabidopsis thaliana. This enzyme, which is primarily expressed in roots, is crucial for root hair elongation. The study used a differential proteomic analysis of the Arabidopsis rhd2-1 mutant, which has a loss-of-function mutation in RBOHC/RHD2. The results showed that the mutation led to deregulation of proteins involved in stress response, metabolism, vesicular transport, and cell wall modification. Notably, the mutant showed significant differences in the proteomes between roots and above-ground parts. The study concluded that the higher sensitivity of the Arabidopsis rhd2-1 mutant to drought is likely due to altered homeostasis of plasma membrane proteins and cytoskeleton remodelling.