Unidad de Nutrición y Bromatología, Facultad de Farmacia, Universidad de Salamanca, Salamanca, Spain.
Anal Chim Acta. 2012 Jun 30;732:73-7. doi: 10.1016/j.aca.2011.12.072. Epub 2012 Jan 11.
The influence of different climatic conditions on the phenolic composition of grape skins and seeds of Vitis vinifera L. cv. Graciano - an autochthonous cultivar from Rioja and Navarra regions (Spain) - was evaluated during ripening in a separate way. Graciano grapes from two different vineyards with different climatic conditions and from two different vintages (2008 and 2009) were analysed. Clear differences between phenolic maturity pattern of grape skins and seeds were observed. In this context, it may be important to evaluate the phenolic maturity of seeds and skins in a separate way in order to decide the optimal harvest time. It was also noticeable that the effect of vintage (mainly due to changes in climatic conditions) may affect the changes in the phenolic composition of both grape skins and seeds. Although in a lesser extent, the effect of the vineyard was also observable, and it was especially relevant in vintages with irregular climatic conditions such as 2008 vintage. In a second strand, results obtained from the phenolic composition of grape seeds and skins at harvest, oenological parameters at harvest and climate conditions during vegetative stage were evaluated and relationships among the aforementioned variables were revealed.
不同气候条件对葡萄(Vitis vinifera L. cv. Graciano)果皮和种子中酚类成分的影响——里奥哈和纳瓦拉地区（西班牙）的一个本地品种——在成熟过程中分别进行了评估。对来自两个具有不同气候条件和两个不同年份（2008 年和 2009 年）的不同葡萄园的 Graciano 葡萄进行了分析。观察到果皮和种子中酚类物质成熟模式的明显差异。在这种情况下，为了确定最佳收获时间，可能需要分别评估种子和果皮的酚类成熟度。还注意到，年份（主要是由于气候条件的变化）的影响可能会影响果皮和种子中酚类成分的变化。尽管影响程度较小，但葡萄园的影响也可以观察到，尤其是在 2008 年份等气候条件不规则的年份。在第二部分中，对收获时葡萄种子和果皮的酚类成分、收获时的酿酒参数和营养生长期的气候条件进行了评估，并揭示了上述变量之间的关系。
