2025-11-01 JOURNAL OF PLANT GROWTH REGULATION 2025 44(卷), 11(期), (6694-6708页)
Salinity is a serious constraint to global agriculture. Sorghum, a staple crop in arid and semi-arid regions, serves as a model for studying salt tolerance in cereals. In this study, six forage sorghum varieties (HC-136, HC-171, HC-260, HC-308, HJ-513, and HJ-541) were evaluated under controlled salinity levels (0, 5, 8, and 10 dS m-1). Salinity significantly impaired morpho-physiological and biochemical traits across all varieties. While all genotypes survived at 8 dS m-1, only HJ-541 maintained growth at 10 dS m-1. At 8 dS m-1, HJ-541 and HJ-513 outperformed others, exhibiting higher photosynthetic rates, greater fresh/dry biomass, improved water status, and enhanced antioxidative enzyme activity. Sensitive varieties showed restricted growth due to ionic imbalance, membrane damage, and hormonal disruption, with mortality at higher stress levels. HJ-541 and HJ-513 demonstrated superior salinity tolerance, indicating their potential for cultivation in salt-affected areas.