Effects of melatonin, proline, and salicylic acid on seedling growth, photosynthetic activity, and leaf nutrients of sorghum under salt stress
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View abstract on PubMed
Summary
This summary is machine-generated.Melatonin (MEL) seed priming enhances sorghum
Area Of Science
- Agricultural Science
- Plant Physiology
- Environmental Science
Background
- Soil salinization threatens global agriculture and food security.
- Climate change exacerbates soil salinization, expanding its reach to new areas.
- Salt stress severely inhibits plant growth and crop productivity.
Purpose Of The Study
- To investigate the efficacy of seed priming agents in mitigating salt stress in sorghum.
- To evaluate the impact of salicylic acid (SA), melatonin (MEL), proline (P), and hydro-priming (H) on sorghum's nutritional status and growth under salinity.
- To determine the optimal priming strategy for enhancing sorghum's salt tolerance.
Main Methods
- Sorghum seeds were primed with H, SA, P, and MEL.
- Primed and unprimed seeds were grown under varying soil salinity levels (0.27 to 8.0 dS m⁻¹).
- Growth parameters, leaf macro- and micronutrient content, and photosynthetic activity were assessed.
Main Results
- Soil salinity significantly reduced sorghum growth, with notable impacts above 2.5 dS m⁻¹.
- SA and MEL priming improved K⁺/Na⁺ and Ca²⁺/Na⁺ ratios and photosynthetic activity.
- MEL priming demonstrated superior macro- and micronutrient uptake under high salinity, enhancing overall salt tolerance.
Conclusions
- Seed priming, particularly with melatonin, offers a promising strategy to improve sorghum's resilience to soil salinization.
- Enhanced nutritional status and photosynthetic activity are key mechanisms behind MEL-induced salt tolerance.
- This research provides valuable insights for developing sustainable agricultural practices in saline environments.
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