Genome‑wide identification of the SWEET gene family in grape ( L.) and expression analysis of in response to water stress.

Unlabelled: Sugars are considered primary metabolites that determine the flavor and quality of grape berries, also playing a crucial role in the plants to resist stress. (s) gene family has been previously reported to be involved in the growth and development of grape, while the changes in transcriptional levels under water stress remain unclear. In this study, sixteen grape s members were identified and annotated based on their homologous genes in and tomato, they were classified into four clades (Clades I to IV) with VvSWEETs by phylogenetic analysis.

Effects of Vine Water Status on Malate Metabolism and γ-Aminobutyric Acid (GABA) Pathway-Related Amino Acids in Marselan ( L.) Grape Berries.

Malic acid is the predominant organic acid in grape berries, and its content is affected by abiotic factors such as temperature (fruit zone microclimate) and water (vine water status). The objectives of this study were to explore the potential mechanisms behind the effects of vine water status on the biosynthesis and degradation of berry malic acid and the potential downstream effects on berry metabolism. This study was conducted over two growing seasons in 2021 and 2022, comprising three watering regimes: no water stress (CK), light water stress (LWS), and moderate water stress (MWS).

Impact of Vine Water Status on 3-Alkyl-2-methoxypyrazine Content and Function Verification of / Genes Associated with 3-Alkyl-2-methoxypyrazine Accumulation in "Marselan" Grape Berries ( L.).

3-Alkyl-2-methoxypyrazines (MPs) could be considered as off-flavor for red wine if the concentration exceeds a certain threshold. It is unknown whether the vine water status has an influence on MP metabolism in grape berries and, therefore, in wines. This study aimed to evaluate the effect of vine water status on MP content and on the expression level of ; moreover, the exact functions of were investigated.

Effects of water stress on endogenous hormones and free polyamines in different tissues of grapevines ( L. cv. 'Merlot').

Water stress can affect plant ecological distribution, crop growth and carbohydrate distribution, impacting berry quality. However, previous studies mainly focused on short-term water stress or osmotic stress and few studies paid attention to the responses of grape to long-term water stresses. Grapevines were subjected to no water stress (CK), mild water stress (T1) and moderate water stress (T2).

Comparison of Methoxypyrazine Content and Expression Pattern of -Methyltransferase Genes in Grape Berries and Wines from Six Cultivars ( L.) in the Eastern Foothill of the Helan Mountain.

Methoxypyrazines (MPs) are a unique class of volatile compounds containing nitrogenous heterocyclics that impart green bell, vegetal and herbal odors to red grape berries and wines. In this study, the quality and MPs levels of grape berries from six representative red wine grape varieties were determined in the two consecutive years. The results showed that, at maturity, the highest total soluble solid was observed in Petit Verdot grape berries in the two consecutive years.

Evolution of Volatile Aroma Compounds and Amino Acids in Cabernet Gernischt Grape Berries ( L.): Comparison of Different Training Systems for Mechanical Soil Burial.

Soil burial is a survival strategy for grapevines that can safely overwinter in north-western regions of China. A suitable training system was beneficial for soil burial to provide winter protection. Moreover, the training system can also significantly affect fruit quality during the development of grape berries, such as primary and secondary metabolites.