What question did this study set out to answer?

The study aims to evaluate the impact of biostimulants on the metabolite content of cauliflower under desert conditions.

March 6, 2026Open Access

Biostimulants combination enhance the metabolites content of brassica Oleracea var. Botrytis curds cultivated in the desert region of Basrah Governorate

WNWurood Hantoosh NeamahUniversity of Basrah ZAZainab A. Al-sudaniUniversity of Basrah FHFatimah Ali HasanUniversity of Basrah

Key Points

The study aims to evaluate the impact of biostimulants on the metabolite content of cauliflower under desert conditions.
Applied Liquorice root extract (LRE) and bread yeast extract (BYE) with varying concentrations on Brassica plants.
Analyzed carbohydrate, protein, phenol, flavonoid contents, and antioxidant activity of curds.
Evaluated the overall metabolite profile and nutrient content of treated cauliflowers.
Carbohydrate levels decreased while protein levels increased in treated cauliflower curds.
Non-significant increases in phenols and flavonoids were observed.
Enhanced antioxidant activity was noted in methanolic extracts of treated plants.
Combination treatment of 10 g/L LRE and 20 g/L BYE was recommended for optimal metabolite enhancement.

Abstract

Among Brassica vegetables, cauliflower (Brassica oleracea var. botrytis) is widely recognized as a most consumed vegetable due to its rich and healthy content of nutrients and bioactive compounds. The enhancement of productivity and quality of preferred crops has gained highly importance in recent decades, driven by increasing customers demand for affordable and healthy food. Away from chemical materials and their risky side effects, biostimulants and biofertilizers could be a suitable alternative for traditional fertilizers under desert conditions. In a current study the extract of Liquorice root LRE and bread yeast BYE applied both with 0, 10, and 20 g/L on Brassica plant to explore their influence in curds metabolites. The results demonstrated that while carbohydrates reduced in curds of treated plants, protein increased with both stimulants application. The non-significant increasing in phenols and flavonoids content was observed in curds of LRE and BYE-treated plants with an elevation in antioxidant activity in their methanolic extracts. Both LRE and BYE applications promoted the curds content of macronutrients and caused a notable alteration in active compounds profile. Noteworthy, the values of acquired outcomes increased or decreased according to applied concentrations of individual or combination of both biostimulants. Therefore, the foliar application with LRE and BYE enhanced the primary and secondary metabolites of Brassica curds. However, the combination of 10 g/L of LRE and 20 g/L of BYE is recommended due to its functions in promoting the flavonoids content, antioxidant capacity, potassium content and active compounds profile such as organosulfur, troponoid, methyl 9-cis,11-trans-octadecadienoate, 1H-Indole-3-acetonitrile and 9,12,15-Octadecatrienoic acid. These findings demonstrate that the synergistic effect of LRE and BYE biostimulants can reprogram primary and secondary metabolism, strengthening stress resilience and improving the nutraceutical quality of cauliflower grown in saline desert environments.

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