Antioxidant activity, total phenolic and chlorophyll content of Keningau grown cucumis sativus l. at two growth stages

Amir Husni Mohd Shariff and Shahirah Baharin and Roswanira Abdul Wahab and Fahrul Huyop and Nur Royhaila Mohamad and Mona Zakaria and Jumardi Roslan and Nurul Huda and Norliza Julmohammad (2021) Antioxidant activity, total phenolic and chlorophyll content of Keningau grown cucumis sativus l. at two growth stages. Jurnal Teknologi, 83. pp. 37-44. ISSN 01279696

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Abstract

Thematuration stage of Cucumis sativusis among the important factors affecting its composition and quality.Hence,this study monitored the differences in total phenolic content (TPC), antioxidant activity, pigment and colourof Keningau-grown cucumbers (Cucumis sativusL.) at two stages of maturities, namely the semi-ripe(SR) and ripe (R). The colourimetricand spectroscopic findings revealed significant differences in the assessed variables (P < 0.05) in the two growth stages except for the pigment. The colourof semi-ripecucumbers was of lower L* (33.39 ± 4.26) and a* (-10.00 ± 1.74) mean values, while the ripe cucumbers registered the corresponding mean values of 36.71 ± 2.85 and -8.90 ± 1.85. R cucumbers gave a higher mean b* coordinate (16.38 ± 3.16) over the SR ones (14.52 ± 2.52). Compositions of pigments, namely, chlorophyll-a(SR: 4.86 ±0.01 µg/mL, R: 3.55 ± 0.00 µg/mL), chlorophyll-b(SR: 2.12 ± 0.02 µg/mL, R: 1.79, 0.02 µg/mL)andtotal chlorophyll were higher in SR (6.98 ±0.02µg/mL) than R( 5.34 ±0.02 µg/mL)cucumbers, except for the composition of carotenoids (SR: 0.82 ± 0.01 µg/mL, R: 1.78 ± 0.01 µg/mL). The TPC in SR was higher (424.21± 5.32 mg/g) than the R ones (185.51±4.62 mg/g), with the corresponding antioxidant activity (IC50) for SR and R at 157.98 ± 1.57 and 191.66 ± 2.58 µg/mL, respectively. TPC and antioxidant activity between the SR and R cucumbers were negatively correlated(-0.992), which meant that not all phenolic compounds wereinvolved in free radical scavenging.

Item Type: Article
Keyword: Cucumis sativus L , total phenolic content, antioxidant activity , pigment
Subjects: S Agriculture > SB Plant culture > SB1-1110 Plant culture > SB403-450.87 Flowers and flower culture. Ornamental plants > SB409-413 Culture of individual plants
T Technology > TP Chemical technology > TP1-1185 Chemical technology > TP200-248 Chemicals: Manufacture, use, etc.
Department: FACULTY > Faculty of Food Science and Nutrition
FACULTY > Faculty of Sustainable Agriculture
Depositing User: ABDULLAH BIN SABUDIN -
Date Deposited: 22 Aug 2023 15:24
Last Modified: 22 Aug 2023 15:24
URI: https://eprints.ums.edu.my/id/eprint/36329

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