Enhancing Irrigation Salinity Stress Tolerance and Increasing Yield in Tomato Using a Precision Engineered Protein Hydrolysate and Ascophyllum nodosum-Derived Biostimulant

Most vegetable crops are salt sensitive, growing inadequately in salinised soils due to the accumulation of toxic ions from prolonged irrigation regimes. Plant biostimulants a potential tool that can be used counteract salinity stress and increase crop yield. The aim this study was investigate ability proprietary protein hydrolysate Ascophyllum nodosum-derived biostimulant PSI-475 activate tolerance responses plants. After characterising composition, initial activity screening performed using Arabidopsis thaliana. stimulated primary root growth (+5.5–20.0%) photosynthetic pigments content (18.8–63.0%) under unstressed stressed conditions. Subsequently, assessed by foliar application on tomato plants (cv. Micro-Tom) received saline water program, which caused significant decrease fruit yield (?37.5%). Stressed treated with increased parameter 31.8% versus control. Experimental data suggest alleviate negative effects improving osmotic adjustment ion homeostasis markers. also able provide benefits (+16.9%) were associated improved leaf biochemical presented support use precision target irrigation.