| Title: | "Nebulized water cooling of the canopy affects leaf temperature, berry composition and wine quality of Sauvignon blanc" |
| Author(s): | Paciello P; Mencarelli F; Palliotti A; Ceccantoni B; Thibon C; Darriet P; Pasquini M; Bellincontro A; |
| Address: | "Department for Innovation in Biological, Agro-Food and Forest systems (DIBAF), University of Tuscia, 01100 Viterbo, Italy. Dipartimento di Scienze Agrarie, Alimentari e Ambientali, Universita degli Studi di Perugia, 06121, Perugia, Italy. ISVV, Unite de Recherche OEnologie, Universite de Bordeaux, Villenave d'Ornon, France" |
| ISSN/ISBN: | 1097-0010 (Electronic) 0022-5142 (Linking) |
| Abstract: | "BACKGROUND: The present paper details a new technique based on spraying nebulized water on vine canopy to counteract the negative impact of the current wave of hot summers with temperatures above 30 degrees C, which usually determine negative effects on vine yield, grape composition and wine quality. RESULTS: The automatized spraying system was able to maintain air temperature at below 30 degrees C (the threshold temperature to start spraying) for all of August 2013, when in the canopy of uncooled vines the temperature was as high as 36 degrees C. The maintenance of temperature below 30 degrees C reduced leaf stress linked to high temperature and irradiance regimes as highlighted by the decrease of H(2) O(2) content and catalase activity in the leaves. A higher amount of total polyphenols and organic acids and lower sugars characterized the grapes of cooled vines. Wine from these grapes had a higher content of some volatile thiols like 3-sulfanylhexanol (3SH) and 3-sulfanylhexylacetate (3SHA), and lower content of 4-methyl-4-sulfanylpentan-2-one (4MSP). CONCLUSION: Under conditions of high temperature and irradiance regimes, water nebulization on the vine canopy can represent a valid solution to reduce and/or avoid oxidative stress and associated effects in the leaves, ensure a regular berry ripening and maintain high wine quality. The consumption of water during nebulization was acceptable, being 180 L ha(-1) min(-1) , which lasted an average of about 1 min to reduce the temperature below the threshold value of 30 degrees C. A total of 85-90 hL (from 0.8 to 0.9 mm) of water per hectare per day was required. (c) 2016 Society of Chemical Industry" |
| Keywords: | Acids/metabolism Aerosols Agriculture/*methods Carbohydrate Metabolism Catalase/metabolism Fruit/*metabolism Global Warming Humans Hydrogen Peroxide/metabolism Light Oxidative Stress Pentanones/metabolism *Plant Leaves Polyphenols/metabolism Seasons Sulfh; |
| Notes: | "MedlinePaciello, Pericle Mencarelli, Fabio Palliotti, Alberto Ceccantoni, Brunella Thibon, Cecile Darriet, Philippe Pasquini, Massimiliano Bellincontro, Andrea eng England 2016/06/22 J Sci Food Agric. 2017 Mar; 97(4):1267-1275. doi: 10.1002/jsfa.7860. Epub 2016 Jul 19" |
