EFFECT OF CHENOPODIUM QUINOA SEED EXTRACT IN PROTECTING THE THYLAKOID MEMBRANE UNDER THE INFLUENCE OF Cd and Na SALTS
2023
Ganieva, R. | Galandarova, T. | Agalarov, R.
The antioxidant properties of an extract obtained from quinoa (Chenopodium quinoa) seeds were determined by restoring the activity of Photosystem II (PSII) exposed to oxidative stress caused by the action of toxic metal salts. Studies were carried out on leaves of wheat seedlings (Triticum aestivum) incubated in a solution of Cd and Na salts with toxic concentrations using the delayed fluorescence method (msDF Chl a). It was revealed that electron transfer was blocked at P680*- QA-QB site into the electron transfer chain in PSII. Under these conditions, the extract exhibited a correlating effect in restoring PSII activity, which correlated with the control experiment on quenching the DPPH free radical with quinoa extract. The antioxidant activity of the extract is due to the presence in the phytochemical composition of quinoa seeds of low molecular weight compounds capable of extinguishing free radicals that cause damage to the thylakoid membrane.
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