Summary of Plant biostimulants as natural alternatives to synthetic auxins in strawberry production: physiological and metabolic insights

Alternatives to Synthetic Auxins in Strawberry Production

The growing demand for sustainable farming has boosted research on alternatives to synthetic auxins in strawberry production. Growers are seeking eco-friendly strategies that improve yield and fruit quality while reducing reliance on synthetic inputs. This study evaluates how natural biostimulants, such as a bacterial filtrate (BF) and a protein hydrolysate (PH), can serve as efficient solutions for strawberry cultivation.

The Need for Natural Auxin Alternatives in Strawberry Cultivation

Strawberries are among the most consumed berries worldwide, and meeting market expectations requires both productivity and sustainability. Synthetic auxins (SA) have long been applied to stimulate flowering and fruit set, but concerns over their environmental impact have accelerated the search for natural auxin substitutes that combine efficiency with eco-responsibility.

Biostimulants as Sustainable Alternatives to Synthetic Auxins in Strawberry

Agronomic trials revealed that both SA and BF improved early fruit yield by stimulating flowering and fruit set. By contrast, PH promoted a more gradual and prolonged fruit set, leading to higher shoot biomass and sustained production. These results highlight that biostimulants can act as reliable alternatives to synthetic auxins in strawberries.

Improving Strawberry Yield and Quality with Auxin Alternatives

Fruit quality analysis showed that PH-treated strawberries developed better firmness and higher soluble solids content—both key for consumer satisfaction and shelf life. Conversely, SA-treated fruits displayed lower firmness and sweetness. This suggests that eco-friendly growth regulators like PH can enhance fruit quality while supporting sustainable farming goals.

Nutritional and Metabolomic Effects of Natural Auxin Substitutes in Strawberry

Ionomic analysis confirmed that all treatments provided sufficient nutrients, with heavy metals well below safety limits. Metabolomic profiling revealed that PH boosted primary metabolites, while BF and SA influenced flavonoid and anthocyanin biosynthesis. Importantly, PH treatment increased beneficial compounds, reinforcing its value as a natural auxin substitute in strawberry production.

Conclusion: Natural Alternatives to Synthetic Auxins for Sustainable Strawberry Farming

This research demonstrates that biostimulants such as bacterial filtrates and protein hydrolysates can provide effective alternatives to synthetic auxins in strawberry cultivation. By optimizing yield, improving fruit quality, and ensuring eco-friendly production, these natural inputs pave the way for a more sustainable and competitive strawberry industry.