Influence of biostimulants on growth and physiology of ornamental crops

Abstract

The horticultural sector's rapid expansion, especially in ornamental plant cultivation, has prompted a surge in interest in sustainable practices. Ornamental plants in urban settings play a vital role in filtering airborne contaminants. To meet aesthetic standards and harvest timing, the industry is exploring holistic strategies, focusing on plant biostimulants. Biostimulants, enhancing plant nutrition efficiency and stress tolerance, offer promise for sustainable ornamental cultivation. Caution is vital to avoid potential negative effects, especially with substances like humic acids. Biostimulants, like protein hydrolysates and Arbuscular mycorrhizal fungi, positively impact nutrient absorption, plant development, yield, and stress resilience. They enhance metabolism, abiotic stress tolerance, nutrient assimilation, and produce quality. Seaweed extracts and chitosan show notable effects on ornamental crops, influencing plant traits and stress tolerance. Arbuscular mycorrhizal fungi improve nutrient and water absorption, enhancing drought stress tolerance. Plant growth-promoting bacteria, e.g., Bacillus and Pseudomonas, act as probiotics, enhancing nutrient use efficiency, disease resistance, and stress tolerance. In conclusion, judicious biostimulant application in ornamental plant cultivation provides a sustainable approach for growth, yield, and quality, mitigating environmental stressors.