Regulation of glutamine synthetase isoforms in two differentially drought-tolerant rice ( Oryza sativa L.) cultivars under water deficit conditions

Key message The regulation of GS isoforms by WD was organ specific. Two GS isoforms i.e. OsGS1;1 and OsGS2 were differentially regulated in IR-64 (drought-sensitive) and Khitish (drought-tolerant) cultivars of rice.