Protective role of quinoa (Chenopodium quinoa Willd.) seed extracts in the protection of the thylakoid membrane under conditions of salt stress

Summary

The antioxidant (AO) properties of extracts obtained from seeds of different varieties of the Quinoa plant (Chenopodium quinoa) in the protection of the activity of photosystem II (PS II) under conditions of oxidative stress caused by the action of NaCl were studied. The studies were carried out in vivo on the leaves of wheat seedlings (Triticum aestivum) incubated in a NaCl solution by the fluorescence method (msec DF Chl a). The observed changes in the induction transitions of msec DF Chl a indicated a suppression of the NaCl activity of the electron transport chain (ETC) of PS II on both the donor and acceptor sides. Under these conditions, the extracts showed a corrective effect in protecting the activity of PSII. The antioxidant (AO) properties of the extracts are probably due to the presence in their chemical composition of a large number of phenolic compounds of vitamins B, C, D, E, K, PP, choline - low molecular weight compounds that are able to neutralize free radicals acting as reactive molecules, causing damage to the photosynthetic membrane.

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