Exogenously applied GA3 promotes plant growth in onion by reducing oxidative stress under saline conditions

Onion (Allium cepa L.) is a biennial crop of high commercial value in Pakistan. considered as salt sensitive plant species. The present investigation was carried out to investigate the effect salinity on onion and its alleviation through exogenously applied gibberellic acid (GA3; 100 mg L-1). Foliar application GA3 (100 L-1) seedlings grown under three levels (0, 2 or 4 dS m-1) after 45 days sowing. Results revealed that growth parameters total soluble protein (TSP) contents declined with increase soil level. While, antioxidant enzyme activities (CAT, SOD POD) were increased salinity. However, significantly enhanced TSP seedlings. Interestingly, CAT, POD concentration decreased which depicts stress saline stressed plants due GA3. It concluded could be some extent by stress.