Plants face diverse environmental stresses throughout their life cycle that establishes a perennial evolutionary pressure for plants. This creates a challenge for plant health and survival, raising major concerns about global health and food security. Plant stress plays a vital role in understudying plant physiology and its impact on the yield of agricultural fields, which will elucidate key aspects of plant morphological, physiological and metabolic changes. This study explores the multifaceted role of silicon (Si) in mitigating plant stress and its application for improving agricultural yield. It moves beyond the current paradigm of passive mechanical support by exploring the Si transport cascade through the influx-efflux transporter and its crosstalk with plant defence hormones. Furthermore, this paper highlights different techno-economic assessments (TEA) of Si-based biofertiliser including life cycle assessment (LCA) and reinforce its commercial viability of Si-mediated involvement in sustainable strategies in agriculture. Unlike previous reviews, this work uniquely integrates Si transporter biology, hormonal crosstalk and TEA/LCA perspectives, while explicitly identifying key knowledge gaps including transporter diversity across non-model crops, long-term nano-Si field safety and species-specific variability and their practical implications for sustainable agriculture. This underscores the significance Si-based stress management as a sustainable and eco-friendly strategy for climate-resilient agriculture, offering significant potential to enhance global food security. Future research should focus on developing Si-efficient crop varieties and integrating Si management with precision agriculture technologies to maximise stress tolerance and agricultural productivity.
