Abstract
This study was designated to determine the total phenolic and flavonoid contents as well as evaluation the in vitro antioxidant activity of the defatted methanolic extracts of six Allium species growing in Egypt. Three of them are subspecies of Allium cepa L. (ssp. red onion, ssp. white onion and ssp. green onion), the other three species are Allium sativum L. (garlic), Allium porrum L. (leek) and Allium kurrat L. (kurrat baladi). The results exhibited that A. cepa (ssp. red onion) and A. porrum have the highest phenolic contents. On the other hand, in vitro antioxidant activity using three methods, 1, 1-diphenyl-2-picrylhydrazyl (DPPH) radical, phosphomolybdate and reducing power assays revealed that A. cepa (ssp. red onion) and A. porrum have high antioxidant activities. Moreover, there was positive correlation between the antioxidant activity and total phenolic contents of the tested Allium species. Therefore, the two plant species A. cepa (ssp. red onion) and A. porrum were submitted to fractionation process using chloroform, ethyl acetate and n-butanol. The results showed that the ethyl acetate fractions of the two plants have high phenolic and flavonoid contents as well as have high antioxidant activities. Also, the preliminary phytochemical screening of the tested Allium species showed that A. cepa (ssp. red onion) and A. porrum have high quantities of flavonoids, steroids, terpenoids and saponins.
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Claims 13
Claim · model-written summary
Red onion had among the highest phenolic contents.
- Taxon
- A. cepa
Allium cepae1 - Material
- ssp. red onione0
- Outcome
- phenolic contentse0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A. cepa (ssp. red onion) and A. porrum have the highest phenolic contents”
t0“ALLIUM”
e1“A. cepa (ssp. red onion) and A. porrum have the highest phenolic contents”
Claim · model-written summary
A. porrum had among the highest phenolic contents.
- Taxon
- A. porrum
Allium ampeloprasume1 - Outcome
- phenolic contentse0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A. cepa (ssp. red onion) and A. porrum have the highest phenolic contents”
t0“ALLIUM”
e1“A. cepa (ssp. red onion) and A. porrum have the highest phenolic contents”
Claim · model-written summary
Red onion had high antioxidant activity.
- Taxon
- A. cepaAllium cepae1
- Material
- ssp. red onione0
- Outcome
- antioxidant activitiese0
- Direction
- highe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A. cepa (ssp. red onion) and A. porrum have high antioxidant activities”
t0“ALLIUM”
e1“A. cepa (ssp. red onion) and A. porrum have the highest phenolic contents”
Claim · model-written summary
A. porrum had high antioxidant activity.
- Taxon
- A. porrumAllium ampeloprasume1
- Outcome
- antioxidant activitiese0
- Direction
- highe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A. cepa (ssp. red onion) and A. porrum have high antioxidant activities”
t0“ALLIUM”
e1“A. cepa (ssp. red onion) and A. porrum have the highest phenolic contents”
Claim · model-written summary
Antioxidant activity correlated positively with total phenolic content across tested Allium species.
_Allium_vineale_-_inflorescence_immature.jpg?width=60){kind=small}
AlliumOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
_Allium_vineale_-_inflorescence_immature.jpg?width=500)
Verbatim
e0“there was positive correlation between the antioxidant activity and total phenolic contents of the tested Allium species”
t0“ALLIUM”
Claim · model-written summary
Ethyl acetate fractions of red onion had high phenolic and flavonoid content.
- Taxon
- A. cepaAllium cepae1
- Treatment
- ethyl acetate fractionse0
- Outcome
- phenolic and flavonoid contentse0
- Direction
- highe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the ethyl acetate fractions of the two plants have high phenolic and flavonoid contents”
t0“ALLIUM”
e1“A. cepa (ssp. red onion) and A. porrum have the highest phenolic contents”
Claim · model-written summary
Ethyl acetate fractions of A. porrum had high phenolic and flavonoid content.
- Taxon
- A. porrumAllium ampeloprasume1
- Treatment
- ethyl acetate fractionse0
- Outcome
- phenolic and flavonoid contentse0
- Direction
- highe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the ethyl acetate fractions of the two plants have high phenolic and flavonoid contents”
t0“ALLIUM”
e1“A. cepa (ssp. red onion) and A. porrum have the highest phenolic contents”
Claim · model-written summary
Ethyl acetate fractions of red onion had high antioxidant activity.
- Taxon
- A. cepaAllium cepae1
- Treatment
- ethyl acetate fractionse0
- Outcome
- antioxidant activitiese0
- Direction
- highe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the ethyl acetate fractions of the two plants have high phenolic and flavonoid contents as well as have high antioxidant activities”
t0“ALLIUM”
e1“A. cepa (ssp. red onion) and A. porrum have the highest phenolic contents”
Claim · model-written summary
Ethyl acetate fractions of A. porrum had high antioxidant activity.
- Taxon
- A. porrumAllium ampeloprasume1
- Treatment
- ethyl acetate fractionse0
- Outcome
- antioxidant activitiese0
- Direction
- highe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the ethyl acetate fractions of the two plants have high phenolic and flavonoid contents as well as have high antioxidant activities”
t0“ALLIUM”
e1“A. cepa (ssp. red onion) and A. porrum have the highest phenolic contents”
Claim · model-written summary
Red onion had high quantities of flavonoids, steroids and terpenoids.
- Taxon
- A. cepaAllium cepae1
- Outcome
- flavonoids, steroids, terpenoidse0
- Direction
- highe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A. cepa (ssp. red onion) and A. porrum have high quantities of flavonoids, steroids, terpenoids and saponins”
t0“ALLIUM”
e1“A. cepa (ssp. red onion) and A. porrum have the highest phenolic contents”
Claim · model-written summary
Red onion had high quantities of saponins.
- Taxon
- A. cepaAllium cepae1
- Outcome
- saponinse0
- Direction
- highe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A. cepa (ssp. red onion) and A. porrum have high quantities of flavonoids, steroids, terpenoids and saponins”
t0“ALLIUM”
e1“A. cepa (ssp. red onion) and A. porrum have the highest phenolic contents”
Claim · model-written summary
A. porrum had high quantities of flavonoids, steroids and terpenoids.
- Taxon
- A. porrumAllium ampeloprasume1
- Outcome
- flavonoids, steroids, terpenoidse0
- Direction
- highe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A. cepa (ssp. red onion) and A. porrum have high quantities of flavonoids, steroids, terpenoids and saponins”
t0“ALLIUM”
e1“A. cepa (ssp. red onion) and A. porrum have the highest phenolic contents”
Claim · model-written summary
A. porrum had high quantities of saponins.
- Taxon
- A. porrumAllium ampeloprasume1
- Outcome
- saponinse0
- Direction
- highe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A. cepa (ssp. red onion) and A. porrum have high quantities of flavonoids, steroids, terpenoids and saponins”
t0“ALLIUM”
e1“A. cepa (ssp. red onion) and A. porrum have the highest phenolic contents”