Influence of Industrial and Alternative Farming Systems on Contents of Sugars, Organic Acids, Total Phenolic Content, and the Antioxidant Activity of Red Beet (Beta vulgaris L. ssp. vulgaris Rote Kugel)

• Published in: Journal of agricultural and food chemistry Vol. 58; no. 22; pp. 11825 - 11831
• Main Authors: Bavec, Martina, Turinek, Matjaž, Grobelnik-Mlakar, Silva, Slatnar, Ana, Bavec, Franc
• Format: Journal Article
• Language: English
• Published: Washington, DC American Chemical Society 24-11-2010
• Subjects: Acids - analysis; Agriculture - methods; alternative farming; antioxidant activity; antioxidants; Antioxidants - analysis; beets; Beta vulgaris; Beta vulgaris - chemistry; Beta vulgaris - growth & development; Biological and medical sciences; Carbohydrates - analysis; Chemical Composition of Foods/Feeds; farming systems; food analysis; food composition; Food industries; Fruit and vegetable industries; Fundamental and applied biological sciences. Psychology; industrial farming systems; organic acids and salts; phenolic compounds; Phenols - analysis; Plant Extracts - analysis; sugar content; total phenolic content; red beet; biodynamic farming; quality of food; sugars; farming system comparison; Beta vulgaris; organic farming; chemical composition; antioxidant activity; organic acids; Vegetables; Phenolic acid; Farming system; Red beet; Antioxidant; Organic acids; Quality; Phenols; Chemical composition; Sugar; Food; Farming
• ISSN: 0021-8561; 1520-5118
• DOI: 10.1021/jf103085p

The contents of sugars, organic acids, total phenolic content, and the antioxidant activity were quantified in the flesh of red beet from conventional (CON), integrated (INT), organic (ORG), biodynamic (BD), and control farming systems using established methods. Significant differences were measured for malic acid, total phenolic content (TPC), and total antioxidant activity, where malic acid content ranged from 2.39 g kg−1 FW (control) to 1.63 g kg−1 FW (CON, ORG, and INT). The highest TPC was measured in BD and control samples (0.677 and 0.672 mg GAE g−1, respectively), and the lowest in CON samples (0.511 mg GAE g−1). Antioxidant activity was positively correlated with TPC (r 2 = 0.6187) and ranged from 0.823 μM TE g−1 FW to 1.270 μM TE g−1 FW in CON and BD samples, respectively, whereas total sugar content ranged from 21.03 g kg−1 FW (CON) to 31.58 g kg−1 FW (BD). The importance of sugars, organic acids, phenols, and antioxidants for human health, as well as for plant resilience and health, gained from this explorative study, is discussed and put into perspective.