Salt Stress-Induced Modulation of Porphyrin Biosynthesis, Photoprotection, and Antioxidant Properties in Rice Plants (Oryza sativa).

ABSTRACT: Salt stress disrupts cellular ion homeostasis and adversely impacts plant growth and productivity. We examined the regulatory mechanisms of porphyrin biosynthesis, photoprotection, and antioxidant properties in salt-stressed rice seedlings. In response to 150 mM NaCl, the rice seedlings exhibited dehydration, reduced relative water content, and increased levels of conductivity, malondialdehyde, and H₂O₂. The expression levels of the salt-stress-responsive genes NHX1, SOS1, and MYB drastically increased after NaCl treatment. The seedlings grown under NaCl stress displayed declines in F_v/F_m, Φ_PSII, rETR_max, and photochemical quenching but increases in nonphotochemical quenching (NPQ) and the

SUBMITTER: Nguyen AT 

PROVIDER: S-EPMC10451626 | biostudies-literature | 2023 Aug

REPOSITORIES: biostudies-literature