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Modifications of soil N availability and grapevine N under cover crops influence on the wine biogenic amines composition

BACKGROUND: Vineyard soil management can modify the nitrogen soil availability and therefore, grape amino acid content. These compounds are precursors of biogenic amines, which have negative effects to wine quality and human health. The objective was to study if the effect of conventional tillage and two cover crops (barley and clover) on grapevine nitrogen status, could be relate with wine biogenic amines. During four years, soil NO3-N, nitrogen content in leaf and wine biogenic amines concentration were determined. RESULTS: Barley reduced soil NO3-N availability and clover increased it. In 2011, at bloom, nitrogen content decreased with the barley treatment in both blade and petiole. In 2012, nitrogen content, in both leaf tissues at bloom, was greater with clover than with tillage and barley treatments. Also, total biogenic amines decreased in barley respect to tillage and clover treatments. There were correlations between some individual and total biogenic amines concentration respect to the nitrogen content in the leaf tissues. This article is protected by copyright. All rights reserved. This article has been accepted for publication and undergone full peer review but has not been through the copyediting, typesetting, pagination and proofreading process, which may lead to differences between this version and the Version of Record. Please cite this article as doi: 10.1002/jsfa.8349 A cc ep te d A rti cl e CONCLUSION: The wine biogenic amines concentration can be affected by the grapevine nitrogen status, provoked by changes in the soil NO3-N availability with both cover crops