Work

Biostimulatory effects of silicon on vegetable crop growth, productivity, and stress resilience: A review

Year: 2026

Type: article

Abstract: Silicon (Si) has emerged as a beneficial element that enhances plant tolerance against diverse biotic and abiotic stresses; however, its mechanistic integration in vegetable crops remains insufficiently synthesised. This review critically consolidates recent advances in Si uptake, transporter regulation, translocation, and deposition dynamics, with emphasis on their coordination with metabolic and hormonal signalling networks. Evidence from transcriptomic, proteomic, and metabolomic studies demonstrates that Si modulates antioxidant defence systems, osmolyte accumulation, and stress-responsive transcription factors, while influencing salicylic acid, jasmonic acid, and ethylene pathways. Rather than acting solely as a structural barrier, Si functions as a regulatory modulator that integrates physical reinforcement with molecular reprogramming. The review also discusses emerging insights into Si nanoparticles, foliar application efficiency, and synergistic interactions with biofertilizers. Understanding these coordinated mechanisms is crucial for developing Si-based strategies to enhance vegetable productivity and climate resilience under changing environmental conditions.

Source: South African Journal of Botany

DOI: 10.1016/j.sajb.2026.03.032