The similar to RCD-one 1 protein SRO1 interacts with GPX3 and functions in plant tolerance of mercury stress.

Heavy metals in the environment are one of the major limiting factors affecting plant growth and development. However, the mechanisms of the heavy metal-induced physiological processes remain to be fully dissected. Here, we explored that SRO1 can physically interact with Glutathione Peroxidase 3 (GPX3) inArabidopsis. Under Hg treatment, similar to thesro1, the growth of thegpx3/sro1was repressed more seriously and the number of true leaves was more reduced and etiolated than that of the wild type andgpx3plants. The electrolyte leakage rates showed that cell membrane integrity ingpx3/sro1was damaged more severely than in the wild type andgpx3mutant. The Real-time PCR results have shown that the expression of theAPX1andCAT3was reduced under mercury stress in thesro1andsro1/gpx3. Our results suggested that the combination of the SRO1 and GPX3 may be contributed to plant response to mercury stress by regulating ROS intracellular oxidative homeostasis. The combination of the SRO1 and GPX3 has an important effect on plant tolerance of mercury stress. [ABSTRACT FROM PUBLISHER]