Articles
Effect of water deficit on table grape berry quality
Article number
1418_16
Pages
127 – 134
Language
English
Abstract
Vine irrigation is becoming an important practice for growing areas where drought is increasingly common with erratic rainfall and high temperatures during fruit ripening.
Regulated deficit irrigation (RDI) has emerged as a potential strategy to enable crops to withstand mild water stress with minimal or no effects on yield and a potential positive impact on fruit quality.
Three cultivar of table grapes grown at NRDIBH Stefanesti were subjected to three water regimes: rainwater (no irrigation, NI), 100% ETC (FI) and 50% ETC (DI) during the growth period until fruit ripening (BBCH 71-89). At the time of harvesting, the following quality indicators were studied: grape weight, malic acid (MA), tartaric acid (TA), lactic acid (La), anthocyanin content (AC), total polyphenols (TP), color indices (DO 420+Do520+DO620). Under full irrigation and deficit irrigation at 50% of ETC, yield increased by 0.4 kg to 0.6 kg for all cultivar versus the production recorded at NI. TA concentration increased under full irrigation (FI) (5.97%), while polyphenols and total antioxidants decreased significantly.
The highest concentration of total polyphenols was found in the NI (1965 mg L-1) and deficit irrigation (DI) treatment (1962 mg 100 L-1), compared to only 1925 mg 100 L-1, as was evident in full irrigation (FI). The results showed that the moderate water deficit during the ripening period increases the concentration of phenolic compounds, anthocyanins and does not affect the weight of the grape berries.
Significant positive correlations were found between total polyphenols and color intensity (CI), with values ranging from 0.52 to 0.81 using the Pearson correlation.
Deficit irrigation in certain stages of grapevine growth (DI) could be a controlled irrigation strategy that could improve grape berry quality without affecting plant growth parameters and fruit production.
Regulated deficit irrigation (RDI) has emerged as a potential strategy to enable crops to withstand mild water stress with minimal or no effects on yield and a potential positive impact on fruit quality.
Three cultivar of table grapes grown at NRDIBH Stefanesti were subjected to three water regimes: rainwater (no irrigation, NI), 100% ETC (FI) and 50% ETC (DI) during the growth period until fruit ripening (BBCH 71-89). At the time of harvesting, the following quality indicators were studied: grape weight, malic acid (MA), tartaric acid (TA), lactic acid (La), anthocyanin content (AC), total polyphenols (TP), color indices (DO 420+Do520+DO620). Under full irrigation and deficit irrigation at 50% of ETC, yield increased by 0.4 kg to 0.6 kg for all cultivar versus the production recorded at NI. TA concentration increased under full irrigation (FI) (5.97%), while polyphenols and total antioxidants decreased significantly.
The highest concentration of total polyphenols was found in the NI (1965 mg L-1) and deficit irrigation (DI) treatment (1962 mg 100 L-1), compared to only 1925 mg 100 L-1, as was evident in full irrigation (FI). The results showed that the moderate water deficit during the ripening period increases the concentration of phenolic compounds, anthocyanins and does not affect the weight of the grape berries.
Significant positive correlations were found between total polyphenols and color intensity (CI), with values ranging from 0.52 to 0.81 using the Pearson correlation.
Deficit irrigation in certain stages of grapevine growth (DI) could be a controlled irrigation strategy that could improve grape berry quality without affecting plant growth parameters and fruit production.
Publication
Authors
A. Tănase, D.I. Sumedrea, A. Florea, A.P. Onache, D. Dinu, A. Asănică
Keywords
Vitis vinifera, irrigation, berry ripening, berry composition
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