In vitro investigation of antioxidant activities of Launea taraxacifolia and Crassocephalum rubens
<p><em>Launea taraxacifolia </em>and <em>Crassocephalum rubens </em>are among many wild, underutilized and under cultivated vegetables in Nigeria that are at risk of extinction. Total flavonoid contents (TFC), total phenolic contents (TPC), and antioxidant activities of...
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| Format: | Article |
| Language: | English |
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ISEKI_Food Association (IFA)
2017-04-01
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| Series: | International Journal of Food Studies |
| Subjects: | |
| Online Access: | https://www.iseki-food-ejournal.com/ojs/index.php/e-journal/article/view/383 |
| _version_ | 1818021834107387904 |
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| author | Funmilayo B. Borokini Lajide Labunmi |
| author_facet | Funmilayo B. Borokini Lajide Labunmi |
| author_sort | Funmilayo B. Borokini |
| collection | DOAJ |
| description | <p><em>Launea taraxacifolia </em>and <em>Crassocephalum rubens </em>are among many wild, underutilized and under cultivated vegetables in Nigeria that are at risk of extinction. Total flavonoid contents (TFC), total phenolic contents (TPC), and antioxidant activities of different concentrations (1-5 mg ml<sup>-1</sup>) were evaluated; using <em>in vitro</em> assays to assess the scavenging properties of 2, 2-diphenyl-1-picryl hydrazyl (DPPHRSP), nitric oxide (NORSP) and hydroxyl (OHRSP). Phenolic profiles of the alcoholic extracts were characterized using high-performance liquid chromatography techniques. The results revealed higher TFC (mg/100g RE) in aqueous (6.06± 0.02-78.79±0.01) than alcohol extracts (with methanol 0.93±0.01—12.73±0.04, and with ethanol -0.85±0.01-- 7.70±0.03). In a similar trend, OHRSP (%) was higher in aqueous extracts (40.83±0.10--91.74±0.19) than alcoholic extracts (with methanol -11.67±0.3-- 30.83±0.06; and with ethanol -14.42±0.06- 40.27±0.05). TPC (mg/100g GAE) which was higher in alcoholic extracts (with methanol -21.48±0.01--133.20±0.16 and with ethanol -9.45±0.01--59.73±0.02) than aqueous extracts (14.83±0.01--52.64±0.03) was in agreement with the trend observed for NORSP (28.24±0.05-151.76±0.08 for methanolic extracts, 21.99±0.13--49.93±0.04 for ethanolic extracts and 38.47±0.11--86.15±0.05 for aqueous extracts). DPPHRSP was also higher in alcoholic extracts (methanolic -22.81±0.01-48.41±0.05 and ethanolic-- 14.53±0.01-62.68±0.07) than aqueous extracts (13.66±0.13--42.86±0.03). TFC, TPC and antioxidant activities showed concentration dependent increase and strong positive correlation with TFC (r= 0.926 – 0.997and r= 0.432 – 1.000) and TPC (r= 0.825 – 0.999 and r= 0.473 - 0.994) for <em>L. taraxacifolia </em>and<em> C. rubens </em>respectively. Caffeic acid, chlorogenic acid, ellagic acid, quercetin and kaempferol were identified as major phenolic components in the extracts. The vegetables have high antioxidant potential for promoting good health; which could be attributed to the identified phytochemicals in them. </p> |
| first_indexed | 2024-04-14T08:23:24Z |
| format | Article |
| id | doaj.art-9e08100aad1545ae8213bffa263275d7 |
| institution | Directory Open Access Journal |
| issn | 2182-1054 |
| language | English |
| last_indexed | 2024-04-14T08:23:24Z |
| publishDate | 2017-04-01 |
| publisher | ISEKI_Food Association (IFA) |
| record_format | Article |
| series | International Journal of Food Studies |
| spelling | doaj.art-9e08100aad1545ae8213bffa263275d72022-12-22T02:04:09ZengISEKI_Food Association (IFA)International Journal of Food Studies2182-10542017-04-0161148In vitro investigation of antioxidant activities of Launea taraxacifolia and Crassocephalum rubensFunmilayo B. Borokini0Lajide Labunmi1Rufus Giwa Giwa PolytechnicFederal University of Technology, Akure<p><em>Launea taraxacifolia </em>and <em>Crassocephalum rubens </em>are among many wild, underutilized and under cultivated vegetables in Nigeria that are at risk of extinction. Total flavonoid contents (TFC), total phenolic contents (TPC), and antioxidant activities of different concentrations (1-5 mg ml<sup>-1</sup>) were evaluated; using <em>in vitro</em> assays to assess the scavenging properties of 2, 2-diphenyl-1-picryl hydrazyl (DPPHRSP), nitric oxide (NORSP) and hydroxyl (OHRSP). Phenolic profiles of the alcoholic extracts were characterized using high-performance liquid chromatography techniques. The results revealed higher TFC (mg/100g RE) in aqueous (6.06± 0.02-78.79±0.01) than alcohol extracts (with methanol 0.93±0.01—12.73±0.04, and with ethanol -0.85±0.01-- 7.70±0.03). In a similar trend, OHRSP (%) was higher in aqueous extracts (40.83±0.10--91.74±0.19) than alcoholic extracts (with methanol -11.67±0.3-- 30.83±0.06; and with ethanol -14.42±0.06- 40.27±0.05). TPC (mg/100g GAE) which was higher in alcoholic extracts (with methanol -21.48±0.01--133.20±0.16 and with ethanol -9.45±0.01--59.73±0.02) than aqueous extracts (14.83±0.01--52.64±0.03) was in agreement with the trend observed for NORSP (28.24±0.05-151.76±0.08 for methanolic extracts, 21.99±0.13--49.93±0.04 for ethanolic extracts and 38.47±0.11--86.15±0.05 for aqueous extracts). DPPHRSP was also higher in alcoholic extracts (methanolic -22.81±0.01-48.41±0.05 and ethanolic-- 14.53±0.01-62.68±0.07) than aqueous extracts (13.66±0.13--42.86±0.03). TFC, TPC and antioxidant activities showed concentration dependent increase and strong positive correlation with TFC (r= 0.926 – 0.997and r= 0.432 – 1.000) and TPC (r= 0.825 – 0.999 and r= 0.473 - 0.994) for <em>L. taraxacifolia </em>and<em> C. rubens </em>respectively. Caffeic acid, chlorogenic acid, ellagic acid, quercetin and kaempferol were identified as major phenolic components in the extracts. The vegetables have high antioxidant potential for promoting good health; which could be attributed to the identified phytochemicals in them. </p>https://www.iseki-food-ejournal.com/ojs/index.php/e-journal/article/view/383underutilizedvegetablesphenolicflavonoidantioxidant |
| spellingShingle | Funmilayo B. Borokini Lajide Labunmi In vitro investigation of antioxidant activities of Launea taraxacifolia and Crassocephalum rubens International Journal of Food Studies underutilized vegetables phenolic flavonoid antioxidant |
| title | In vitro investigation of antioxidant activities of Launea taraxacifolia and Crassocephalum rubens |
| title_full | In vitro investigation of antioxidant activities of Launea taraxacifolia and Crassocephalum rubens |
| title_fullStr | In vitro investigation of antioxidant activities of Launea taraxacifolia and Crassocephalum rubens |
| title_full_unstemmed | In vitro investigation of antioxidant activities of Launea taraxacifolia and Crassocephalum rubens |
| title_short | In vitro investigation of antioxidant activities of Launea taraxacifolia and Crassocephalum rubens |
| title_sort | in vitro investigation of antioxidant activities of launea taraxacifolia and crassocephalum rubens |
| topic | underutilized vegetables phenolic flavonoid antioxidant |
| url | https://www.iseki-food-ejournal.com/ojs/index.php/e-journal/article/view/383 |
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