Assessment of antioxidant activity and total polyphenol content in various quinoa genotypes

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00027006%3A_____%2F22%3A10175520" target="_blank" >RIV/00027006:_____/22:10175520 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Assessment of antioxidant activity and total polyphenol content in various quinoa genotypes

Original language description

Recently, the production and consumption of quinoa seeds have been increasing thanks to their superior nutritional value and a great number of biologically active compounds. Selected quinoa genotypes were grown in Crop Research Institute Prague as one of the first trials to obtain primary data on the nutritional profile of quinoa cultivated under climatic conditions in the Czech Republic. In this study, the antioxidant activity (AA) and total polyphenol content (TPC) were determined in 72 quinoa seed samples over three consecutive years 2018-2020. Moreover, 69 quinoa leaf samples from the year 2021 were subjected to the same analyses. In the seed samples, the mean AA was approximately 2.1 mmol trolox equivalent (TE)/g DM. There was no statistical significance in AA among three years. The AA of coloured genotypes (red, orange, brown colour) was higher than the mean AA values of non-coloured genotypes. In leaves, the mean AA reached approximately 30 mmol TE/g DM. The mean value of TPC was 25.5 mg gallic acid equivalent (GAE)/g DM in seed samples and 233 mg GAE/g DM in leaves. Statistical analysis proved statistical differences in TPC over the three years of the study with the highest mean TPC observed in the year 2020. Higher TPC may also correspond to favourable climatic conditions during the year 2020. Coloured genotypes did not possess significantly higher TPC than white genotypes. The correlation between AA and TPC was not clearly determined in seeds and leaves of quinoa. It can be concluded that the examined properties varied through the growing season and/or among varieties. Nonetheless, quinoa seeds and leaves are still considered an excellent source of antioxidants and bioactive chemicals in the human diet, comparable to other pseudocereals.

Czech name

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Czech description

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Type

O - Miscellaneous

CEP classification

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OECD FORD branch

40106 - Agronomy, plant breeding and plant protection; (Agricultural biotechnology to be 4.4)

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2022

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů