Abstract:

The purpose is to explore the effects of ALA on maize seed germination and seedling growth under salt stress. ‘Jinhai 5’ was selected as the experimental material, NaCl concentration was set at 100 mmol/L, and ALA concentration gradient was set at 0, 25, 50, 100 and 200 mg/L. The seeds and seedlings were treated to determine the germination rate and seed vigor, and the content of MDA, soluble sugar, proline and chlorophyll, and to analyze the physiological and biochemical indexes. The results showed that maize seed germination and seedling growth were inhibited to varying degrees under salt stress, while the application of ALA significantly reduced the level of plant salt damage, enhanced seed vigor, and increased the content of stress-resistant substances in seedlings. Among them, when the concentration of ALA was 25 mg/L, seed germination, seedling growth and development could be promoted, and the effect was significantly better than that of other treatments

Key words: 5-aminolevulinic Acid (ALA), Maize, Salt Stress, Seed Germination, Seedling Growth and Development