Dataset of concentrations of free terpenes at different phenological stages in Vitis vinifera L. Shiraz, Cabernet Sauvignon, Riesling, Chardonnay and Pinot Gris

Abstract

Five Vitis vinifera L. cultivars Shiraz, Cabernet Sauvignon, Riesling, Chardonnay and Pinot Gris at different E-L development stages were harvested in two experimental vintages. Temperature and rainfall data of the growing period were obtained from the Australian Government Bureau of Meteorology. Free terpene concentrations of all harvested grape samples were analysed using HS-SPME-GC-MS. One-way ANNOVA was performed to evaluate the significance of changes in terpene concentrations at different maturation stages. More analysis of the data is provided in “Free terpene evolution during the berry maturation of five Vitis vinifera L. cultivars” [1].

The Influence of UV on the Production of Free Terpenes in Vitis vinifera cv. Shiraz

“…In the current study, no clear changes were observed in sesquiterpenes derived from the humulyl carbocation pathway, the nerolidol diphosphate pathway and the (E, E)-germacradienyl cation pathway, whereas the two sesquiterpenes (α-muurolene and γ-cadinene) derived from the germacrene D pathway had the most obvious changes. Our previous study observed the highest concentration of α-muurolene before veraison with a decreasing trend afterward until harvest, whereas γ-cadinene could only be detected at harvest [26,38]. The current study observed higher α-muurolene and γ-cadinene in the UV attenuation treatment from intermediate ripeness to harvest, which was consistent with our previous study where grape bunch light exclusion from intermediate ripeness to harvest resulted in a higher γ-cadinene concentration at harvest than light exclusion at other phenological stages [42].…”

“…SIM mode recorded common sesquiterpene ions, namely m/z 105, 133, 147, 161 and 204, to facilitate the identification of sesquiterpenes at low concentrations. Quantification of all terpenes delivered to the GC via SPME sampling was based on the target ion response areas [26]. A mixed alkane standard with a range of C7-C30 was analysed to calculate the retention index (RI).…”

“…β-Damascenone is biosynthesised via the apo-carotenoid pathway and influenced by the VvCCD1 gene, which could stably express from veraison to harvest in Shiraz [37]. Therefore, this compound could be detected at most phenological stages during grape ripening [26,38]. However, the influences of light and UV radiation on the expression of VvCCD1 and other carotenoid degradation genes remain inconclusive [36], thus the mechanism of UV impacts on norisoprenoid biosynthesis requires further investigation.…”

“…Regarding the impacts of UV attenuation film's application stage, our previous research studies and others have demonstrated that the concentration of most sesquiterpenes decreased from fruit-set to veraison and gradually increased at the late stage of ripening, and many sesquiterpenes only appeared at the end of the grape ripening period [25][26][27]38,41]. Sesquiterpenes are biosynthesised through distinct biological pathways, and the responses of sesquiterpenes to UV attenuation at different phenological stages could vary among different biosynthesis pathways [2].…”

Optimizing extraction method of aroma compounds from grape pomace

“…Some identified compounds were semiquantified using the standard curve of similar compound when the standard was not available as described in our previous publications (Luo et al., 2019; Zhang et al., 2016).…”