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Sustainability 2014, 6(2), 1059-1075;

Agronomic Management under Organic Farming May Affect the Bioactive Compounds of Lentil (Lens culinaris L.) and Grass Pea (Lathyrus communis L.)?

Consiglio per la Ricerca e la Sperimentazione in Agricoltura (CRA)—Cereal Research Centre (CER), S.S. 673 km 25 + 200, Foggia 71122, Italy
These authors contributed equally to this work.
Author to whom correspondence should be addressed.
Received: 6 December 2013 / Revised: 13 February 2014 / Accepted: 19 February 2014 / Published: 21 February 2014
(This article belongs to the Special Issue Organic Farming and a Systems Approach to Sustainable Agroecosystems)
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A two year field experiment was carried out to evaluate the effects of three row and eight row seeding on the total phenolic compound (TPC), total flavonoid content (TFC), hydrolyzed (HTC) and condensed tannin (CTC), antioxidant activity (ABTS assay), protein content and soluble dietary fiber (SDF) and insoluble dietary fiber (IDF) in the extracts of lentil (Lens culinaris L.) and grass pea (Lathyrus communis L.) cultivated under organic farming. The aim of this study was to determine whether row spacing used for seeding in organic farming systems for lentil and grass pea is a suitable method to increase the accumulation of antioxidant compounds in these crops. Grass pea showed the highest mean SDF and protein while lentil varieties showed the greatest and significant content of all of the antioxidant compounds. In lentil, there were increases in TPC (52%), HTC (73%), TFC (85%) and CTC (41%), passing from three rows to eight rows, while in grass pea, the increases were lower, and only significant for TFC and CTC (37%, 13% respectively). In both lentils and grass pea, the highest correlation coefficient was between TPC and HTC, which indicates that the HTC includes the predominant phenolic compounds in lentil as well as in grass pea (r = 0.98, 0.71 p < 0.001, respectively). Regardless of legume species, TPC, HTC, TFC and CTC showed significant (p < 0.001) and linear correlations with the ABTS assay. These data confirm the key role of row spacing for the improvement of the antioxidant properties of lentil in organic farming; moreover, they hint at the major responsiveness and adaptation of lentil to environmental stimulus with respect to grass pea. View Full-Text
Keywords: organic farming; antioxidants; food quality; legumes; organic food organic farming; antioxidants; food quality; legumes; organic food

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Menga, V.; Codianni, P.; Fares, C. Agronomic Management under Organic Farming May Affect the Bioactive Compounds of Lentil (Lens culinaris L.) and Grass Pea (Lathyrus communis L.)? Sustainability 2014, 6, 1059-1075.

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