Abstract
Onion (Allium cepa L.) is one of the oldest cultivated plants with tremendous therapeutic properties. They are a rich source of flavonoids, consisting mainly of the major flavonols quercetin-3,4’-O-diglucoside (QDG) and quercetin-4’- O-monoglucoside (QMG). Outer layer which is the transitional layer with the first living cells below the dry onion peel and innermost layers from two different sizes of onion were studied for their total phenolic contents (TPC) and free radical scavenging activities (FRSA). Outer layers had greatest TPC content (ranging in between 84.4 to 97.8 mg GAE/100g fresh weight vs. 48.6 to 52.5 mg GAE/100g fresh weight), and FRSA than the innermost layers. The outermost layers showed better H2O2 scavenging activity and increased reducing power. The results were more pronounced for the layers of smaller onion having lesser moisture content than larger onion. The antioxidant assays were found to be correlated with the phenolic content. Our results demonstrate that the outermost living layers had higher antioxidant activities than the innermost layers indicating higher flavonoid content in outer layers.
Keywords: Allium cepa L., antioxidant activity, flavonoids, onion layer extract, onion size, phenolic content, maturation, moisture content, free radical scarvenging activity, therapeutic property
Current Nutrition & Food Science
Title:Variation of Antioxidant Capacity in Different Layers of Onion (Allium cepa L.) At Two Different Stages of Maturation
Volume: 8 Issue: 2
Author(s): Nidhi Jaiswal and Syed Ibrahim Rizvi
Affiliation:
Keywords: Allium cepa L., antioxidant activity, flavonoids, onion layer extract, onion size, phenolic content, maturation, moisture content, free radical scarvenging activity, therapeutic property
Abstract: Onion (Allium cepa L.) is one of the oldest cultivated plants with tremendous therapeutic properties. They are a rich source of flavonoids, consisting mainly of the major flavonols quercetin-3,4’-O-diglucoside (QDG) and quercetin-4’- O-monoglucoside (QMG). Outer layer which is the transitional layer with the first living cells below the dry onion peel and innermost layers from two different sizes of onion were studied for their total phenolic contents (TPC) and free radical scavenging activities (FRSA). Outer layers had greatest TPC content (ranging in between 84.4 to 97.8 mg GAE/100g fresh weight vs. 48.6 to 52.5 mg GAE/100g fresh weight), and FRSA than the innermost layers. The outermost layers showed better H2O2 scavenging activity and increased reducing power. The results were more pronounced for the layers of smaller onion having lesser moisture content than larger onion. The antioxidant assays were found to be correlated with the phenolic content. Our results demonstrate that the outermost living layers had higher antioxidant activities than the innermost layers indicating higher flavonoid content in outer layers.
Export Options
About this article
Cite this article as:
Jaiswal Nidhi and Ibrahim Rizvi Syed, Variation of Antioxidant Capacity in Different Layers of Onion (Allium cepa L.) At Two Different Stages of Maturation, Current Nutrition & Food Science 2012; 8 (2) . https://dx.doi.org/10.2174/157340112800840763
DOI https://dx.doi.org/10.2174/157340112800840763 |
Print ISSN 1573-4013 |
Publisher Name Bentham Science Publisher |
Online ISSN 2212-3881 |
Call for Papers in Thematic Issues
Functional Foods in Human Health and Beyond
Foods are important source of nutrients including carbohydrates, proteins, lipids and other minerals. Furthermore, the functional foods are those agents that have additional components that are essential supports to the body in terms of antioxidant and pharmacologically active agents. The predominant functional foods are of plant in origin, whereas some ...read more
Harnessing Bioactive Compounds from Food Waste: Sustainable Extraction Strategies and Health Applications
Food waste presents a significant challenge across the postharvest cycle, from agricultural production to distribution. However, within this waste lies a treasure trove of bioactive chemicals that hold immense potential for nutraceuticals, functional foods, and postharvest additives, including antimicrobials. Various extraction methods, such as solvent extraction (SE), supercritical fluid extraction ...read more
Natural Bioactive Compounds Derivatives in Nutraceutical and Food Science
In the last years, plants have been widely used for their numerous properties and now there is growing interest in the study of classes of compounds obtained from plant species or derived from them. The importance of these natural compounds lies in their important therapeutic purposes, and in their capability ...read more
Related Journals
- Author Guidelines
- Graphical Abstracts
- Fabricating and Stating False Information
- Research Misconduct
- Post Publication Discussions and Corrections
- Publishing Ethics and Rectitude
- Increase Visibility of Your Article
- Archiving Policies
- Peer Review Workflow
- Order Your Article Before Print
- Promote Your Article
- Manuscript Transfer Facility
- Editorial Policies
- Allegations from Whistleblowers
- Announcements
Related Articles
-
Inhibition of Transcription Factors by Plant-Derived Compounds and their Implications in Inflammation and Cancer
Current Pharmaceutical Design Wave Intensity Analysis in the Human Coronary Circulation in Health and Disease
Current Cardiology Reviews A Brief History of ‘Lone’ Atrial Fibrillation: From ‘A Peculiar Pulse Irregularity’ to a Modern Public Health Concern
Current Pharmaceutical Design Applications of FDG-PET/CT in Assessment of Vascular Infection and Inflammation
Current Molecular Imaging (Discontinued) Gender as a Regulator of Atherosclerosis in Murine Models
Current Drug Targets Is there any Additional Prognostic Value of Central Blood Pressure Wave Forms Beyond Peripheral Blood Pressure?
Current Pharmaceutical Design The Effect of Polyphenol Consumption on Blood Pressure
Mini-Reviews in Medicinal Chemistry Should Percutaneous Coronary Intervention be the Standard Treatment Strategy for Significant Coronary Artery Disease in all Octogenarians?
Current Cardiology Reviews The Effects of Drugs Used in Anaesthesia on Platelet Membrane Receptors and on Platelet Function
Current Drug Targets Antihyperglycemic and Antidyslipidemic Activities of the <i>Aqueous Salvia hispanica</i> Extract in Diabetic Rat
Cardiovascular & Hematological Agents in Medicinal Chemistry Selective Divalent Copper Chelation for the Treatment of Diabetes Mellitus
Current Medicinal Chemistry The Role of Genes (and Environmental Stress) in Depression: An Update
Current Psychiatry Reviews CYP3A4 *1B Gene Polymorphism in Coronary Artery Disease Patients with Obesity Undergoing Statin Treatment
Current Pharmacogenomics and Personalized Medicine Coronary Microcirculation and Ischemic Heart Disease, Today
Current Pharmaceutical Design Surgical or Interventional Revascularization in Diabetic Patients with Coronary Artery Disease?
Current Diabetes Reviews Recommendations for the Treatment of Hypertension in Elderly People
Cardiovascular & Hematological Agents in Medicinal Chemistry Phospholipase D Inhibition: Beneficial and Harmful Consequences for a Double-Dealer Enzyme
Current Enzyme Inhibition Mediterranean Food Pattern in Rheumatoid Arthritis
Current Rheumatology Reviews Novel 4-Oxothienopyrimidinyl Propanoic Acid Derivatives as AMPActivated Protein Kinase (AMPK) Activators
Letters in Drug Design & Discovery Increased Exercise Favorably Modifies Coronary Artery Disease and Peripheral Arterial Disease Outcomes
Current Vascular Pharmacology