Xie Sha, Liu Yunqi, Chen Huawei, Yang Bowei, Ge Maosheng, Zhang Zhenwen
College of Enology, Northwest A & F University, Yangling, China.
College of Water Resources and Architectural Engineering, Northwest A & F University, Yangling, China.
J Sci Food Agric. 2022 Oct;102(13):6100-6111. doi: 10.1002/jsfa.11962. Epub 2022 May 11.
Vitis vinifera L. cv. Syrah grapevines in most Chinese viticulture regions generally have compact clusters that increase the susceptibility to diseases and inhibit coloration of the inner berries. Gibberellic acid (GA ) is a plant growth regulator that is widely used during grape cultivation to elongate the rachis, control fruit set, and decrease cluster compactness. In this study, Syrah grapevines were treated with GA before flowering in 2019 and 2020 to determine the optimal GA treatment concentrations and times for decreasing bunch compactness, while minimizing the negative effects on the wine grape cluster weight.
Pre-flowering GA applications at 3, 5, and 7 mg L , especially treatment at 20 days before flowering, decreased Syrah grape bunch compactness by decreasing the fruit set rate and promoting bunch elongation, with minimal adverse effects on the healthy grape cluster weight in both years. The 7 mg L GA treatment at 20 days before flowering significantly increased reducing sugar, total phenolic, tannin, and total anthocyanin contents of Syrah grape berries in 2019 and 2020. Moreover, high-performance liquid chromatography-electrospray ionization-tandem mass spectrometry, hierarchical cluster, and principal component analysis results indicated GA applications before flowering (3, 5, and 7 mg L ) significantly affected the accumulation of different anthocyanins in Syrah grape berries. Notably, the application of 7 mg L GA at 20 days before flowering resulted in the highest anthocyanin content.
Pre-flowering gibberellin application can decrease bunch compactness and improve the quality of Syrah grape berries. These findings reflect the potential utility of gibberellin treatments for decreasing cluster compactness and increasing the quality of wine grapes. © 2022 Society of Chemical Industry.
在中国大多数葡萄种植区，西拉葡萄（Vitis vinifera L. cv. Syrah）通常果穗紧密，这增加了病害易感性，并抑制了内部浆果的着色。赤霉素（GA）是一种植物生长调节剂，在葡萄栽培过程中广泛用于拉长果穗轴、控制坐果，并降低果穗紧密度。在本研究中，于2019年和2020年在开花前对西拉葡萄进行GA处理，以确定降低果穗紧密度的最佳GA处理浓度和时间，同时尽量减少对酿酒葡萄果穗重量的负面影响。
在开花前施用3、5和7 mg L的GA，尤其是在开花前20天处理，通过降低坐果率和促进果穗伸长来降低西拉葡萄果穗紧密度，在这两年中对健康葡萄果穗重量的负面影响最小。在开花前20天施用7 mg L的GA处理显著增加了2019年和2020年西拉葡萄浆果的还原糖、总酚、单宁和总花青素含量。此外，高效液相色谱 - 电喷雾电离串联质谱、层次聚类和主成分分析结果表明，开花前施用GA（3、5和7 mg L）显著影响了西拉葡萄浆果中不同花青素的积累。值得注意的是，在开花前20天施用7 mg L的GA导致花青素含量最高。
开花前施用赤霉素可降低果穗紧密度并提高西拉葡萄浆果的品质。这些发现反映了赤霉素处理在降低果穗紧密度和提高酿酒葡萄品质方面的潜在效用。© 2022化学工业协会。
