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Micronutrient and Growth Regulator Seed Priming -Enhanced Salt Stress Resilience in Rice (Oryza sativa)

Author(s) Mr. MBARAKA ABBAKARI BATARE, Prof. DASTUN GABRIEL MSUYA, Dr. BEATRICE VICTOR MWAIPOPO
Country Tanzania
Abstract Soil salinity is a major constraint to rice production in sub-Saharan Africa, limiting yield and productivity. This study evaluated the effectiveness of seed priming in enhancing growth and yield performance of rice (Oryza sativa) in salt-affected soils. Seeds of five rice cultivars were primed with gibberellic acid (GA), zinc (Zn), GA+Zn, water, or left unprimed (control) in a factorial experiment arranged in a randomized complete block design with three replications. Data were collected at tillering, booting, and maturity stages, and analyzed using ANOVA. Results showed that GA and GA+Zn priming significantly (p < 0.05) improved performance across most traits. The highest mean grain yields were recorded in GA+Zn (3.9 t ha⁻¹), GA (3.8 t ha⁻¹), and Zn (3.5 t ha⁻¹) treatments, compared to 2.5 t ha⁻¹ in water-primed and unprimed controls. Among cultivars, SATO1 (GA) achieved the highest yield (5.51 t ha⁻¹), followed by SATO1 (GA+Zn, 4.74 t ha⁻¹) and TXD306 (GA+Zn, 4.06 t ha⁻¹), indicating genotype-specific responses to priming. Priming also increased filled grain number and reduced sterility and salt injury across cultivars. Overall, seed priming particularly with GA and GA+Zn enhanced rice resilience and productivity under saline conditions. Integrating priming into existing rice production systems offers a simple, low-cost strategy to improve yields and promote food security in salt-affected environments.
Keywords Abiotic stress, Rice yield, Salinity tolerance, Seed priming, Tanzania
Field Biology > Agriculture / Botany
Published In Volume 16, Issue 4, October-December 2025
Published On 2025-10-18
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