Abstract
Abstract Objective This study was conducted to analyze the physio-biochemical responses of two sorghum-sudangrass (Sorghum bicolor × Sorghum Sudanese Stapf.) hybrid (“Aneto” and “Sugar Graze”) seedlings exposed to salt stress. Materials and methods Sorghum-sudangrass hybrid seeds sown in MS medium containing 50 and 100 mM NaCl. The activity of antioxidant enzymes (SOD, CAT, GR, APX), chlorophyll (a, b, and total), malondialdehyde (MDA), and proline levels measured in 14 days old seedlings. Results As a result of the study, the activity of antioxidant enzymes (CAT, SOD, APX, and GR), malondialdehyde (MDA), proline and chlorophyll contents of seedlings of cv. “Aneto” increased. On the other hand, SOD activity, proline, and chlorophyll content increased while CAT, APX, GR activity, and malondialdehyde (MDA) content decreased in seedlings of cv. “Sugar graze”. Conclusion Overall, the results showed that the cv. “Aneto” was less affected by the adverse effects of salt stress than the cv. “Sugar graze”. This study is essential for revealing biochemical responses of 14 days old Sorghum-Sudanese hybrid seedlings against salt stress. These study findings can use in breeding programs for sorghum plants.
Highlights
Salinity is a major problem in agriculture and crop production [1]
The activity of antioxidant enzymes (SOD, CAT, glutathione reductase (GR), ascorbate peroxidase (APX)), chlorophyll (a, b, and total), malondialdehyde (MDA), and proline levels measured in 14 days old seedlings
superoxide dismutase (SOD) activity, proline, and chlorophyll content increased while CAT, APX, GR activity, and malondialdehyde (MDA) content decreased in seedlings of cv
Summary
Salinity is a major problem in agriculture and crop production [1]. It is known to limit plant performance through a decrease in plant growth and yield [2]. Wang et al [4] and Jha et al [5] highlighted emphasized the increasing ratios of saltstressed areas and predicted an almost 30% loss in land based on salt stress in the 25 years. This environmental stress factor continuously increases its Sorghum is a C4 plant, known by its high photosynthetic capacity and high yield and its high tolerance of stressors (drought, radiation and solar heat), including salt [2, 12]. The significance of this study was that it revealed the physio-biochemical responses of Sorghum-Sudangrass hybrids’ seedlings in their early growth stage to salt stress
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