UV screening by phenolics in berries of grapevine (Vitis vinifera)

Kolb, Christiane A.; Kopeckỳ, J.; Riederer, Markus; Pfündel, Erhard

doi:10.1071/fp03076

Cited by 114 publications

(103 citation statements)

References 52 publications

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“…Kennedy et al, 2000Kennedy et al, , 2002Adams, 2006) and/or how UV light can influence the synthesis and production of these compounds (e.g. Versari et al, 2001;Kolb et al, 2003;Berli et al, 2008), which are important for wine quality. In the present study, total polyphenol content decreased significantly, from ca.…”

Section: Resultsmentioning

confidence: 99%

Effect of Ambient Sunlight Intensity on the Temporal Phenolic Profiles of Vitis Vinifera L. Cv. Chardonnay During the Ripening Season – A Field Study

Šebela

Turóczy

Olejníčková

et al. 2017

SAJEV

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Grape phenolics are considered to have a significant impact on wine quality, with their quantity and dynamics being strongly influenced by environmental conditions. We investigated the effect of ambient sunlight on the temporal dynamics of phenolics in cv. Chardonnay under field conditions during the 2012 ripening season, from véraison until harvest. The phenolic profiles of the grapes were monitored at predefined time intervals by using high-pressure liquid chromatography (HPLC) and spectrophotometric (OD) analysis. The obtained concentrations were correlated with the average sunlight intensities preceding the sampling. No significant correlations were found between the hydroxycinnamic acid, hydroxybenzoic acid and stilbene content, in contrast with the strong relationships found between: (i) OD 280 nm , (ii) catechin, (iii) flavanols and (iv) total polyphenols and the fluctuating dose of ambient sunlight reaching the grapes throughout the ripening season. The light-dependent dynamics of several main phenolic compounds in cv. Chardonnay during the ripening period could help to establish correlation models that increase the applicability of meteorological data in the assessment of optimal phenolic ripeness in modern viticulture.

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Section: Resultsmentioning

confidence: 99%

Effect of Ambient Sunlight Intensity on the Temporal Phenolic Profiles of Vitis Vinifera L. Cv. Chardonnay During the Ripening Season – A Field Study

Šebela

Turóczy

Olejníčková

et al. 2017

SAJEV

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“…Results suggest that there was a significant decrease in hydroxycinnamates in Pinot noir and Chardonnay base wines when leaf removal occurred. An increase in light exposure due to leaf removal is a possible explanation for the differences, and in one study berries with increased light exposure had decreased levels of hydroxycinnamic acids (Kolb et al 2003).…”

Section: Clonesmentioning

confidence: 99%

Viticulture for Sparkling Wine Production: A Review

Jones

Kerslake

et al. 2014

Am. J. Enol. Vitic.

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Abstract:The current understanding of the influences of climate and viticultural practices on fruit quality at harvest and on sparkling wine quality is reviewed. Factors such as variety, clone, planting density, pruning method, local climate and soils, and current and future climate warming are discussed in the context of achieving a desired harvest quality. A common observation was the relatively less intensive viticultural management applied to grapes destined for sparkling wines compared to table wines throughout the world. Few studies have focused on management of fruit specifically for sparkling wine production. Given that it is accepted that a lower pH, higher titratable acidity, and lower soluble sugars than table wine are considered desirable for sparkling wine production, the literature from viticultural studies for table wines which influence these desired fruit quality parameters has been reported. Specific findings on canopy management, leaf removal, and yield manipulation for the production of table wines indicate potential for application and development to optimize fruit for the production of sparkling wines. Fruit quality targets are remarkably uniform across international growing regions but distinct combinations of variety, clone, and management are currently used to arrive at those targets. Further, studies of viticultural management, particularly those that alter cluster temperature and exposure to incident light, yield manipulation, and fruit quality are likely to best inform production techniques that result in fruit quality ideal for the production of premium sparkling wines. New challenges include the need for increasing mechanization to maintain cost-effective production and climate warming, which affects the production of fruit for premium sparkling production in terms of flavor development and high acidity. Current trends include the diversification of growing regions to cooler regions that enable the production of high acid fruit and increased exploration of alternative varieties and clones that are better suited to a warmer climate.

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“…---Two portable fluorimeters, permitting repeated measurements of samples under field conditions, have recently been developed: the UV-A-PAM fluorimeter which uses a radiation guide as an optical link between the instrument and the sample , Kolb et al 2003, Krause et al 2003, and the Dualex fluorimeter in which the sample is sandwiched between excitation and detection units (Goulas et al 2004). In this paper, the portable UV-A-PAM instrument was used.…”

Section: Introductionmentioning

confidence: 99%

UV-A screening in plants determined using a new portable fluorimeter

Kolb¹,

Schreiber²,

Gademann³

et al. 2005

Photosynt.

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UV screening by plant surfaces can be determined by exposing plant organs to UV radiation and measuring the chlorophyll (Chl) fluorescence elicited. From this fluorescence, the UV transmittance can be derived: the more intense the screening the lower the reporter Chl fluorescence and the lower the UV transmittance. The relationships between UV screening at 375 nm, as determined in the field by a portable UV-A-PAM fluorimeter, and UV screening at 314 and 360 nm, measured in the laboratory with the non-portable XE-PAM fluorimeter, were investigated in leaves of grapevine (Vitis vinifera L. cv. Bacchus) and barley (Hordeum vulgare cv. Ricarda), as well as in white grape berries. With leaves, linear trends were observed between XE-PAM measurements at 314 nm and UV-A-PAM measurements at 375 nm but the relationship between transmittance at 360 and 375 nm in barley was curved: a simple model calculation suggests that this curvi-linearity arises from particularly weak absorbance of barley flavonoids at 375 nm relative to absorbance at 360 nm. Transmittance values at 314 nm plotted against 375 nm yielded a much smaller slope in grapevine leaves than in barley leaves, which was attributed to screening in the short-wavelength UV by hydroxycinnamic acids in the former but not in the latter species. With grape berries, a poor correlation was detected between transmittances at 314 and 375 nm which might arise from high scattering of UV radiation at the berry surface. Such artefacts appear to be confined to the UV-B region, as berry transmittance at 360 nm correlated very well with that at 375 nm. Thus, assessment of UV screening in the field at short UV wavelengths using 375 nm readings from a UV-A-PAM fluorimeter is possible provided that information is available on the relationship between the transmittance at the UV wavelength of interest and at 375 nm for the sample tissue being investigated.

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UV screening by phenolics in berries of grapevine (Vitis vinifera)

Cited by 114 publications

References 52 publications

Effect of Ambient Sunlight Intensity on the Temporal Phenolic Profiles of Vitis Vinifera L. Cv. Chardonnay During the Ripening Season – A Field Study

Effect of Ambient Sunlight Intensity on the Temporal Phenolic Profiles of Vitis Vinifera L. Cv. Chardonnay During the Ripening Season – A Field Study

Viticulture for Sparkling Wine Production: A Review

UV-A screening in plants determined using a new portable fluorimeter

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