Decoding The Role Of OsPRX83 In Enhancing Osmotic Stress Tolerance In Rice Through ABA-Dependent Pathways And ROS Scavenging

The study identified the peroxidase precursor gene OsPRX83 and explored its role in enhancing osmotic stress tolerance in rice. By using overexpression and CRISPR-Cas9 mutant lines, the researchers found that OsPRX83 expression is induced by H2O2, PEG, NaCl, and ABA treatments. Overexpression of OsPRX83 led to higher survival rates, increased peroxidase and ascorbate peroxidase activities, and greater ABA sensitivity compared to wild-type and mutant plants. Transcriptome analysis indicated that OsPRX83 modulates the expression of stress-responsive genes, enhancing ROS scavenging. The findings suggest that OsPRX83 is crucial for stress tolerance in rice through ABA-dependent pathways and ROS scavenging, offering potential for developing drought-resistant rice varieties.