Total phenolic contents, antioxidant and antibacterial activities of chia seeds (Salvia hispanica L.) having different coat color

Yunus Emre Tunçil; Ömer Faruk Çelik

doi:10.29278/azd.593853

Total phenolic contents, antioxidant and antibacterial activities of chia seeds (Salvia hispanica L.) having different coat color

Öz

Due to its high nutritional value and health-promoting effects, there is an increasing interest in utilizing chia seed in the human diet. The aim of this study was to compare the compositional and functional characteristics of white and black chia seeds that are commercially available in Turkey. Compositional comparisons were done by quantifying protein, oil, ash and moisture contents. The total phenolic content and antioxidant activity were measured using defatted ground chia seeds. Our results revealed that black chia seeds had significantly higher protein, ash and moisture contents, compared to white chia seeds, but no difference was found in terms of oil content (P > 0.05). Conversely, the total phenolic content of white chia seeds (3.52 ± 0.08 mg GAE [gallic acid equivalent]/g sample) was significantly higher than those in black seeds (3.42 ± 0.06 mg GAE/g sample) (P < 0.05). Consequently, a significant difference (P < 0.05) was observed between DPPH free radical scavenging activities of white and black chia seeds, with the former exhibiting 231.5 ± 6.3 mmol Trolox equivalent (TE)/g, and the latter having 197.5 ± 7.4 mmol TE/g. The higher antioxidant activity of white chia seed was further confirmed by calculating IC₅₀ values (IC₅₀ of black chia seed = 2.001 mg/ml vs that of white chia seed = 1.735 mg/ml). Finally, we assessed antibacterial activities of chia seed extract and chia seed oil against human pathogens using agar disc-diffusion and agar well-diffusion assays. However, neither of the assays had shown antimicrobial activity against the tested bacteria. Considering the previously published reports, chia seed and chia seed oil seem to possess species-, and even strain-, specific antimicrobial activities. Overall, the results of this study suggest that white chia seed has better functional properties than black seeds.

Anahtar Kelimeler

White chia seed,black chia seed,DPPH

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Details

Primary Language

English

Subjects

Agricultural, Veterinary and Food Sciences

Journal Section

Research Article

Authors

Yunus Emre Tunçil ^*

Ömer Faruk Çelik

Publication Date

June 1, 2019

Submission Date

February 16, 2019

Acceptance Date

March 29, 2019

Published in Issue

Year 2019 Volume: 8 Number: 1

DOI

https://doi.org/10.29278/azd.593853

IZ

https://izlik.org/JA23XC47SP

Cite

RIS / Bibtex

APA

Tunçil, Y. E., & Çelik, Ö. F. (2019). Total phenolic contents, antioxidant and antibacterial activities of chia seeds (Salvia hispanica L.) having different coat color. Akademik Ziraat Dergisi, 8(1), 113-120. https://doi.org/10.29278/azd.593853