Agronomic biofortification with selenium improves the yield and nutraceutical quality in tomato under soilless conditions

Summary

This hydroponic trial investigated agronomic biofortification of tomato using five selenium doses (0–8 mg L⁻¹ sodium selenite). The researchers found that 2 mg L⁻¹ selenium optimised both yield and nutraceutical quality, including antioxidant capacity and bioactive compound biosynthesis, whilst higher doses reduced these parameters. The work suggests that selenium fortification via the nutrient solution offers a practical approach to enhance phytochemical production and potentially improve public health outcomes through improved food quality.

Regional applicability

The study was conducted using a soilless hydroponic system, which is geographically independent; the methodology and findings on optimal selenium dosage are transferable to United Kingdom horticulture, particularly protected cropping systems and commercial tomato production. However, application in field-grown crops or in areas with naturally high soil selenium availability may require adaptation.

Key measures

Tomato yield, selenium concentration in fruit, nutraceutical quality (phytochemical compounds), antioxidant capacity

Outcomes reported

The study evaluated the effects of five selenium doses (0–8 mg L⁻¹) applied via nutritional solution on tomato yield, nutraceutical quality, selenium concentration, and antioxidant capacity in a hydroponic system. Agronomic biofortification with selenium at optimum dose improved yield, nutraceutical quality, and fruit selenium concentration.

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