DataSheet_1_Grape Flavonoid Evolution and Composition Under Altered Light and Temperature Conditions in Cabernet Sauvignon (Vitis vinifera L.).pdf

The evolution of flavonoids under altered temperature and light conditions in the fruit zone was followed in Cabernet Sauvignon (Vitis vinifera L.) grapes during ripening. The study was conducted over two consecutive seasons in 2010/2011 and 2011/2012 comprising two main treatments in which the light quantity was manipulated in the bunch zone: (1) standard (STD) with no lateral shoot or leaf removal and (2) leaf removal west (LRW) treatment with leaf removal on the western side of the bunch zone. Furthermore, the light quality was altered by installing ultraviolet B-suppression sheets within the bunch zone in both seasons. Tannin evolution was dependent on the prevailing light quality/quantity and temperatures during berry development in a particular season. Grape seed tannin accumulation coincided with seed development and commenced at the early stages of berry development. Seed proanthocyanidin composition was not influenced by the treatments. The largest impact on proanthocyanidin accumulation and structure in the skin was due to seasonal variations highlighting the complex interaction between light quality and/or quantity across the two growing seasons and eventually the complex interaction with temperature. Flavonol accumulation was significantly influenced by the light quality, which is known to be the main abiotic driver of flavonol biosynthesis regulation. Anthocyanin concentration and content were largely dependent on the temperature and light quality in a particular season. Anthocyanin composition was altered by the season rather than the treatment.

本研究追踪了在调节温度和光照条件下，葡萄园区域中花青素的演变过程，以赤霞珠（Vitis vinifera L.）葡萄的成熟期为研究对象。研究跨越了2010/2011和2011/2012两个连续的年份，包含两种主要处理方式，即对串区光照量进行操作：（1）标准处理（STD），不进行侧芽或叶片去除；（2）叶去除西边处理（LRW），在串区西侧进行叶片去除。此外，通过在两个年份的串区内安装紫外B抑制膜来改变光照质量。单宁的演变依赖于特定年份中浆果发育期间的光照质量/数量和温度。葡萄籽单宁的积累与籽粒发育同步，并始于浆果发育的早期阶段。籽粒原花青素的组成不受处理方式的影响。在皮肤中原花青素积累和结构的影响最大的是季节变化，这凸显了两个生长季节中光照质量与/或数量的复杂交互作用，以及最终与温度的复杂交互作用。黄酮醇的积累受到光照质量的显著影响，已知这是调控黄酮醇生物合成的主要非生物因素。花青素的浓度和含量主要依赖于特定年份的温度和光照质量。花青素的组成受季节影响而非处理方式。