ENHANCING SEED GERMINATION AND SALT STRESS TOLERANCE IN MUNG BEAN THROUGH SPIRULINA EXTRACT PRIMING
DOI:
https://doi.org/10.20319/icrlsh.2026.89104Keywords:
Spirulina, Biopriming, Salinity Stress, Mung Bean, BangladeshAbstract
Salinity stress is a major abiotic constraint affecting crop establishment in coastal agricultural regions of Bangladesh. Seed priming using natural biostimulants offers a simple and environmentally friendly approach to improve germination under saline conditions. This study evaluated the potential of Spirulina (Arthrospira platensis) extract as a seed priming agent for enhancing germination and early seedling growth of mung bean (Vigna radiata) under salt stress.Seeds were primed with aqueous Spirulina extract at concentrations of 1–5% (w/v) and germinated under NaCl-induced salinity levels of 0, 25, 50, 100, and 150 mM. Germination percentage, mean germination time, shoot length, root length, and seedling vigor index were evaluated. Salinity stress progressively reduced germination and seedling growth in untreated seeds. Spirulina priming improved germination performance and seedling development across salinity treatments, with concentrations of 2–3% generally showing the most consistent improvement. At 100 mM NaCl, Spirulina-primed seeds showed higher germination percentage, faster germination, and improved seedling growth compared with the untreated control. The results indicate that Spirulina extract may support early-stage seedling establishment under saline conditions. This study suggests that microalgal-based seed priming has potential as a sustainable and low-cost strategy for improving crop performance in salt- affected environments. Further research under soil and field conditions is required to confirm practical applicability.
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