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. 2022 Nov;29(54):81222-81233.
doi: 10.1007/s11356-022-21267-x. Epub 2022 Jun 22.

Effects of tetracycline on the secondary metabolites and nutritional value of oilseed rape (Brassica napus L.)

Mengting Zhao  1 , Jun Li  2 , Shanshan Zhou  1 , Guiwei Rao  3 , Dongmei Xu  4
Affiliations

Effects of tetracycline on the secondary metabolites and nutritional value of oilseed rape (Brassica napus L.)

Mengting Zhao et al. Environ Sci Pollut Res Int. 2022 Nov.

Abstract

Secondary metabolism, which helps a plant cope with external stress, is sensitive to environmental changes and plays a prominent role in maintaining plant health. However, few studies of the effects of tetracycline on the relationships between secondary metabolism and plant stress responses have been performed. Here, secondary metabolism, nutritional value, and oxidative stress responses in oilseed rape (Brassica napus L.) exposed to tetracycline for 14 days were investigated. Tetracycline inhibited growth and biomass accumulation and decreased the chlorophyll content. The sinapine, phenol, and flavonoid contents were 118.46%, 99.67%, and 93.07% higher, respectively, but the carotenoid content was 76.47% lower in plants exposed to 8 mg/L tetracycline than the control plants. Tetracycline affected the nutritional value of oilseed rape. Tetracycline decreased the dietary fiber, soluble sugar contents, and microelement (Fe, Mn, and Zn) contents. The antioxidant system also responded strongly to tetracycline. The catalase and peroxidase activities were increased and the superoxide dismutase activity was decreased by tetracycline. Tetracycline caused oxidative damage and secondary metabolite disturbances and adversely affected oilseed rape growth and quality. The results provide a new perspective on the effects of tetracycline on plants in relation to secondary metabolites and improve our understanding involved in the toxicity of tetracycline.

Keywords: Antibiotics; Nutritional value; Oilseed rape; Secondary metabolism; Tetracycline.

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