INFLUENCE OF PARTIAL ROOTZONE DRYING ON THE COMPOSITION AND ACCUMULATION OF ANTHOCYANINS IN GRAPE BERRIES (VITIS VINIFERA CV. CABERNET SAUVIGNON)
K. BINDON, P. DRY and B. LOVEYS AGJWR Vol 14, Number 1, 2008
The aim of the study was to investigate anthocyanin composition and accumulation in grape berries in response to the partial rootzone drying (PRD) irrigation technique.The experiment was on Vitis vinifera cv. Cabernet Sauvignon, wherein PRD had a 40% water deficit relative to the control treatment. PRD decreased berry weight compared with the control, but did not influence total anthocyanin concentration. A significant increase in glucosides of delphinidin, cyanidin, petunidin and peonidin was found in response to PRD from the onset of anthocyanin accumulation (veraison), while malvidin-glucosides were unaffected by the irrigation treatment. The PRD treatment did not cause changes in the proportions of acetyl-, 3-p-coumaroyl- and monoglucoside anthocyanins. Wines produced from the treatments showed no difference in total monomeric anthocyanin, but relative increases (15%) in wine colour density, total tannin and polymeric pigment occurred in response to the PRD treatment. The anthocyanin composition of the wines reflected the response shown in the grapes, where the relative contribution of non-malvidin anthocyanins to total anthocyanins was significantly increased in wines from the PRD treatment. The differences in anthocyanin composition observed in response to PRD could not be accounted for by changes in bunch microclimate, and most likely reflect differences in the methylation step of anthocyanin synthesis.The observed changes in anthocyanin composition under the PRD irrigation system have not been previously reported in response to water deficit, and may reflect a unique response to within-vine signalling induced by PRD. (We recommend that you consult the full text of this article.)
The seasonal character of harvests limits winemaking considerably, especially oenological research. Thus, conserving sterile musts during the whole year to carry out experiments is certainly a very...
Vineyard yield forecasting is a key issue for vintage scheduling and optimization of winemaking operations. High errors in yield forecasting can be found in the wine industry, mainly due to the hig...
A cost efficient and accurate new system for vineyard yield forecasting that reduces the error below 10% per block, flexible and adaptable to any trellis system and extension
Intense aromas of blackcurrants and red fruits characterise the sensory profile of some red wines that are very popular with consumers. Over the last decade, researchers have shown that varietal th...
Carlos F. Gonzalez, Texas A&M University; Anika Kinkhabwala, A&P Inphatec
A break-through technology developed exclusively for viticulture that protects growing vines under disease pressure, or as a curative after disease symptoms become visible specific to Pierce’s Dise...
Matteo Gatti, Department of Sustainable Crop Production - UCSC
Within-field variability can be managed through Precision Viticulture (PV) protocols aiming at identifying homogeneous zones and addressing site-specific operations including selective harvesting (...
Cookies are pieces of information that are stored on your device that you can delete or block at any time. The information we collect allows us to improve the service we offer you. No data is disclosed to third parties.
Technical cookies are necessary for the functioning of the site and take into account your browsing preferences, such as language.
Technical cookies
Analytical cookies refer to systems for statistical analysis, in anonymous and aggregate form, relating to the running of the site and user behaviour.
Analytical cookies
Failure to accept the optional cookies will not eliminate the display of any advertisements. You can change your preferences at any time by clicking on the icon in the bottom right-hand corner.