Asproudi, Andriani

Cavalletto, Silvia

Guidoni, Silvia

Mania, Elena

Panero, Luisa

Petrozziello, Maurizio

English

Institutional Research Information System University of Turin

20 November 2023AperTO - Archivio Istituzionale Open Access dell'Università di TorinoOriginal Citation:The impact of vine microclimate on the evolution of carotenoids in cv. Nebbiolo.Terms of use:Open Access(Article begins on next page)Anyone can freely access the full text of works made available as "Open Access". Works made availableunder a Creative Commons license can be used according to the terms and conditions of said license. Useof all other works requires consent of the right holder (author or publisher) if not exempted from copyrightprotection by the applicable law.Availability:This is the author's manuscriptThis version is available http://hdl.handle.net/2318/1706582 since 2019-07-17T11:23:16Zmin8 10 12 14 16 18 20 22 24 26mAU0100200300400500600700 DAD1 A, Sig=450,4 Ref=off (ANDRICAROT\10APRIL13 2013-04-10 10-51-02\5CV1A.D)Lutein I.S.beta-caroteneMicroclimate characterizationThe impact of vine microclimate on the evolution of carotenoids in cv. NebbioloAsproudi A.*a, Petrozziello M.a, Cavaletto S.b, Mania E.b, Panero L.b, Guidoni S.b*andriani.asproudi@crea.gov.it; ve.asti@crea.gov.itGrape carotenoids are precursors of low threshold aroma compounds in wine such as the C13-norisoprenoids and their evolution during ripening may be consider anindicator of grapes aromatic potential (Winterhalter & Ebeler, 2013). Environmental conditions, such as climate, light exposure of bunches and soil water deficit mayinfluence the carotenoid content in grape berries, although their concentration has also been shown to differ between cultivars (Oliveira et. al., 2014).The data were collected, during two consecutiveseasons, in two nearby Nebbiolo planted vineyards(North-West Italy), characterized by high vigourheterogeneity and by a different aspect (South orWest). Each vineyard parcel was sorted in 2 vinevigour classes (V- the less vigorous parcel andV+ the more vigorous) (Asproudi et al., 2016).Berry samplings were collected from 15 daysafter flowering until harvest.Photosynthetically Active Radiation (PAR) and airtemperature (T, °C) inside the bunch zone weremeasured in continuous from pea size stage toharvest time.West V-, V+South V-, V+A liquid-liquid extraction was carried out under both, low temperature and dim yellow light, to minimize degradation, light-induced isomerization and oxidation of carotenoids. A subsequent H.P.L.C. determination  was carried out.  The South plot has always registered higher PAR and temperature values compared to theWest exposure in both 2012 and 2013 vintage years, particularly in the post veraisonperiod.In both seasons, the TPARI value was the highest in the South V– and higher in the South, rather than the West vineyards. In addition, in 2012, the index was higher than in 2013, especially for the South blocks (not reported).Temperature Index (TI) depends on both the value and the duration of the temperature level.  TI values above the threshold of 35 °C, were registered mainly during the post veraisonperiod for all treatments andthe most notable differences between the West parcels (milder microclimate) and the South ones (warmer microclimate) were observed in 2013 season.Conclusions: High carotenoid contents were found in Nebbiolo berries; the most abundant compounds were lutein and β-carotene. Synthesis and degradation of thesecarotenoids, were influenced by vine microclimate variability as a consequence of both vigour and aspect. Moreover, a variety effect can be presumed as regards the evolutiontrend of lutein since the post veraison peak noticed for Nebbiolo grapes was noticed only for few other cultivars in literature, such as Touriga Franca and Merlot (Oliveiraet. al., 2014; Kamffer et. al., 2010).REFERENCESWinterhalter, P. & Ebeler, S. In Carotenoid Cleavage Products 2013, 1134, 3–9 (ACS); Oliveira, C. et. al. Journal of Agricultural and Food Chemistry 2004, 52 (13), 4178–4184; Asproudi et. al., Food Chemistry 2016, 211, 947-956;Kamffer, Z. et. al. Journal of Agricultural and Food Chemistry 2010, 58 (11), 6578–6586.Carotenoid extraction and determinationRESULTS0100200300400 29/06  14/07 29/07 13/08 28/08 12/09 27/09 12/10mol ∙ m-2Total PAR Index (∑ 15 days)-2012South V - ISouth V - IISouth V + ISouth V + II West V + IWest V + IIveraisonharvest•A lutein content peak proportional to thevine vigour was noticed in the post-veraisonperiod;•A major photodegradation than synthesisof lutein probably occurred in the lessvigorous and warmer parcel (South V-);•Final lutein contents were proportional tothe vine vigour: grapes less protected fromdirect radiation had the lowest luteincontent.• A costant and similar trend washighlighted for b-carotene, in all vigourconditions during 2012;•A near veraison significant decline of b-carotene in the warmer South parcels wasregistered in 2013, season when the TIdifferences (>35°C) between the twoaspects were more notable.The influence exertedby bunch microclimateon the rate ofsynthesis/degradationof some relevantcarotenoids, wasinvestigated for thefirst time in Nebbiolograpes, an Italianvariety of highinterest for local andinternational winemarket.0246810121425-Jun 12-Jul 29-Jul 15-Aug 1-Sep 18-Sep 5-Octmg / berryLutein  South V-  Lutein South V+  Lutein West  V+2012veraison0246810121425-Jun 12-Jul 29-Jul 15-Aug 1-Sep 18-Sep 5-Octmg / berry beta-car South V- beta-car South V+beta-car West V+veraisonaConsiglio per la ricerca in agricoltura e l’analisi dell’economia agraria – CREA-VE, Asti, Italyb Dipartimento di Scienze Agrarie, Forestali e Alimentari -Università Degli Studi di Torino0246810121420-Jul 6-Aug 23-Aug 9-Sep 26-Sep 13-Octmg / berry Lutein South V-  Lutein South V+ Lutein West  V+  Lutein West  V-veraison20130246810121420-Jul 6-Aug 23-Aug 9-Sep 26-Sep 13-Octmg / berrybeta-car South V- beta-car South V+beta-car West  V+ beta-car West  V-veraisonTI [number of hours]Class of T AspectClass of vigour2012 2013periodstotal averageperiodstotal average30/0629/0730/0728/0829/0812/1030/0629/0730/0728/0829/0812/10T < 25 °CSouthV - 417 373 907 16971713421 438 832 16911727V+ 428 382 919 1729 439 445 879 1763WestV - 436 404 965 18051806440 466 913 18191826V+ 437 403 966 1806 442 468 922 183225 °C ≤ T < 35 °CSouthV - 269 215 147 631618246 128 157 531565V+ 243 210 152 605 267 176 156 599WestV - 222 218 108 548582272 233 161 666645V+ 267 238 110 615 267 218 138 623T ≥ 35 °CSouthV - 34 132 26 19218953 154 91 298228V+ 49 128 9 186 14 99 45 158WestV - 62 98 7 1671338 21 6 3550V+ 16 79 4 99 11 34 20 65

The impact of vine microclimate on the evolution of carotenoids in cv. Nebbiolo.

https://iris.unito.it/bitstream/2318/1706582/1/2017_Asproudi%20et%20al_IVAS2017_poster.pdf

The impact of vine microclimate on the evolution of carotenoids in cv. Nebbiolo.

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