Respiratory burst oxidase homolog C (RsRbohC) (RsRbohC)

Respiratory burst oxidase homolog C (RsRbohC) is an NADPH oxidase enzyme localized to the plasma membrane in the radish plant (Raphanus sativus). It catalyzes the production of superoxide anions from molecular oxygen using NADPH as an electron donor, initiating the generation of various reactive oxygen species (ROS) that act as vital signaling molecules in plant development and environmental adaptation. These ROS molecules are essential secondary messengers involved in the plant's response to abiotic stressors such as salinity and low temperatures, where RsRbohC activity is tightly regulated by transcription factors like RsCAMTA11 and RsCDF3 to maintain redox homeostasis. Beyond stress responses, RsRbohC is specifically implicated in the development of radish pithiness, a physiological condition characterized by the death of parenchyma cells and the formation of sponge-like cavities in the root. In the context of agricultural biotechnology, RsRbohC is a key target for genetic modification and molecular breeding strategies aimed at enhancing crop resilience and post-harvest quality. Although not a target for human therapeutics, its role in mediating defensive ROS production and structural integrity makes it a significant molecule for research into horticultural sustainability.

Other names

Respiratory burst oxidase protein CNADPH oxidase CRBOHCRsRBOHCRadish NADPH oxidase C

RsRbohC catalyzes the production of superoxide anions (O2-) by transferring electrons from cytosolic NADPH to extracellular or apoplastic oxygen. This initiation of a reactive oxygen species (ROS) burst serves as a critical signaling mechanism for inducing stress-response genes and regulating physiological changes within the plant cell.