Comparative Nutritional and Antioxidant Compounds of Organic and Conventional Vegetables during the Main Market Availability Period

Seven winter and five summer vegetables produced under organic and conventional systems were collected from a supermarket seven times between January and April and between July and October for winter and summer vegetables, respectively, and their ascorbic acid and total phenolic content (compounds w...

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Bibliographic Details
Published in:Nitrogen (Basel, Switzerland) Switzerland), 2021-03, Vol.2 (1), p.18-29
Main Authors: Roumeliotis, Constantinos, Siomos, Anastasios S., Gerasopoulos, Dimitrios
Format: Article
Language:English
Subjects:
Acids
antioxidant activity
Antioxidants
Ascorbic acid
Consumers
Cropping systems
Dietary minerals
Ethanol
Nitrates
Nutrition
Nutritive value
phenolics
Phenols
Sampling
Solids
Species
Summer
Variance analysis
Vegetables
Vitamin C
Winter
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Summary:Seven winter and five summer vegetables produced under organic and conventional systems were collected from a supermarket seven times between January and April and between July and October for winter and summer vegetables, respectively, and their ascorbic acid and total phenolic content (compounds with proven antioxidant activity) as well as total antioxidant capacity, soluble solids and nitrates were determined. The results clearly indicated that, from the three factors studied (vegetable species, cropping system and sampling time), vegetable species made the highest contribution to ascorbic acid, phenolics, antioxidant capacity, soluble solids and nitrates. Results for each vegetable species showed that most organic vegetables appear to have lower nitrate content, some have higher phenolics, antioxidant capacity and soluble solids, and only few have higher ascorbic acid compared with conventional vegetables. The significance of the differences in nutritional and antioxidant value between organic and conventional vegetables is questionable, since vegetable species and sampling time can affect their nutritional value to a great or greater extent than the cropping system.
ISSN:2504-3129
2504-3129
DOI:10.3390/nitrogen2010002