Valdés M Esperanza, Talaverano M Inmaculada, Moreno Daniel, Uriarte David, Mancha Luis, Vilanova Mar
CICYTEX-INTAEX, Technological Institute of Food and Agriculture, Av. Adolfo Suárez, s/n, 06071 Badajoz, Spain.
CICYTEX-FOV, Agricultural Research Institute Finca La Orden-Valdesequera, Crta. A-V, Km 372, 06187 Badajoz, Spain.
Plants (Basel). 2022 May 24;11(11):1393. doi: 10.3390/plants11111393.
Wine phenolics are of considerable interest due to their implication in the organoleptic appreciation of wines and due to their bioactive functions as antioxidants. In this work, the effects of sustainable strategies in the vineyard, regulated deficit irrigation treatments (RDI) and crop load level (CL) on Tempranillo grape phenolics over two seasons was studied. Rainfed (T), early (EDI) and late (LDI) regulated deficit irrigation was applied. Cluster thinning (TH) and control (C) without cluster removal were also applied under each irrigation treatment. The effect of CL remained independent of RDI for all compounds, except for phenolic acids. The RDI influence on the grape skin phenolic profile was higher than CL in the dry season (2009); however, in 2010, the effect of CL was greater. In 2009, a tendency to increase anthocyanin and hydroxycinnamic acid content in grape skins was registered in EDI with respect to T. However, significant decreases in hydroxycinnamic and flavanol compounds were found in LDI. In 2010, the wettest year, CL increased all phenolic families' content. Thus, it can be concluded that the effects of RDI and cluster thinning treatments depend on the family of compounds considered and the meteorological conditions of the year.
葡萄酒中的酚类物质备受关注，这是因为它们对葡萄酒的感官评价有影响，还因其具有抗氧化剂的生物活性功能。在这项研究中，研究了葡萄园中的可持续策略、调亏灌溉处理（RDI）和作物负载水平（CL）对两个生长季的丹魄葡萄酚类物质的影响。采用了雨养（T）、早期（EDI）和晚期（LDI）调亏灌溉。在每种灌溉处理下，还进行了疏穗（TH）和不疏穗的对照（C）处理。除酚酸外，所有化合物的CL效应均独立于RDI。在旱季（2009年），RDI对葡萄皮酚类物质谱的影响高于CL；然而，在2010年，CL的影响更大。2009年，与T相比，EDI处理的葡萄皮中花青素和羟基肉桂酸含量有增加的趋势。然而，LDI处理中羟基肉桂酸和黄烷醇类化合物含量显著下降。在2010年这个降雨量最多的年份，CL增加了所有酚类物质家族的含量。因此，可以得出结论，RDI和疏穗处理的效果取决于所考虑的化合物家族以及当年的气象条件。
