Impacts of leaf removal and shoot thinning on cumulative daily light intensity and thermal time and their cascading effects of grapevine (Vitis vinifera L.) berry and wine chemistry in warm climates

Torres, Nazareth; Martínez‐Lüscher, Johann; Porte, Etienne; Yu, Runze; Kurtural, S. Kaan

doi:10.1016/j.foodchem.2020.128447

Cited by 34 publications

(35 citation statements)

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“…As a reference value for the temporal variation in flavonoid content of Ginkgo leaves, the variation in physicochemical parameters aided in explaining the reason for the variation in flavonoids. The increased chlorophyll content enhanced the photosynthesis intensity, resulting in an increase in flavonoid content to some extent ( Torres et al, 2021 ). The antioxidant mechanism of Ginkgo explains to some extent the reasons for the relevant changes in in flavonoid content (in terms of changes in MDA content and SOD activity).…”

Section: Discussionmentioning

confidence: 99%

Endophytic Bacterial Communities of Ginkgo biloba Leaves During Leaf Developmental Period

et al. 2021

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Plant-specialized secondary metabolites have ecological functions in mediating interactions between plants and their entophytes. In this study, high-throughput gene sequencing was used to analyze the composition and abundance of bacteria from Ginkgo leaves at five different sampling times. The results indicated that the bacterial community structure varied during leaf developmental stage. Bacterial diversity was observed to be the highest at T2 stage and the lowest at T1 stage. Proteobacteria, Firmicutes, Actinobacteria, Chloroflexi, Cyanobacteria, and Bacteroidetes were found as the dominant phyla. The major genera also showed consistency across sampling times, but there was a significant variation in their abundance, such as Bacillus, Lysinibacillus, and Staphylococcus. Significant correlations were observed between endophytic bacteria and flavonoids. Especially, Staphylococcus showed a significant positive correlation with quercetin, and changes in the abundance of Staphylococcus also showed a strong correlation with flavonoid content. In order to determine the effect of flavonoids on endophytic bacteria of Ginkgo leaves, an extracorporeal culture of related strains (a strain of Staphylococcus and a strain of Deinococcus) was performed, and it was found that the effect of flavonoids on them remained consistent. The predicted result of Tax4Fun2 revealed that flavonoids might lead to a lower abundance of endophytic microorganisms, which further proved the correlation between bacterial communities and flavonoids. This study provided the first insight into the bacterial community composition during the development of Ginkgo leaves and the correlation between the endophytic bacteria and flavonoids.

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Section: Discussionmentioning

confidence: 99%

Endophytic Bacterial Communities of Ginkgo biloba Leaves During Leaf Developmental Period

et al. 2021

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“…In general, 100% ET c irrigation treatment reduced the proportion of petunidin derivatives and increased the proportion of peonidin derivatives leading to a decreased ratio between tri-hydroxylated and di-hydroxylated anthocyanins, which was suggested to be less chemically stable for winemaking purposes (Torres et al, 2020 ). Likewise, previous studies have reported an increase in the ratio between tri-hydroxylated and di-hydroxylated anthocyanins when grapevines were subjected to water deficits given the upregulation of the relevant anthocyanin biosynthetic genes (Castellarin et al, 2007 ; Martínez-Lüscher et al, 2014 ; Cook et al, 2015 ; Savoi et al, 2017 ).…”

Section: Discussionmentioning

confidence: 99%

“…Flavonol composition was modified by applied water amounts in 2020 growing, where proportions of myricetin and syringetin derivatives increased and quercetin and kaempferol derivatives decreased with 100% ET c . Given that quercetin and kaempferol are important antioxidants in red wines, this shift in the composition may impact the antioxidant properties of wine (Dabeek and Ventura-Marra, 2019 ; Torres et al, 2020 ). In previous work, it was reported that 100% ET c irrigation increased the net carbon assimilation and improved the grapevine water status, leading to higher soluble sugar and starch contents in leaves with the highest yields, and vegetative biomasses (Torres et al, 2021b ).…”

Section: Discussionmentioning

confidence: 99%

Effects of Irrigation at Different Fractions of Crop Evapotranspiration on Water Productivity and Flavonoid Composition of Cabernet Sauvignon Grapevine

Torres

Martínez‐Lüscher

et al. 2021

Front. Plant Sci.

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Climate change models predict lower precipitation and higher air temperatures that will negatively affect viticultural regions. Irrigation of vineyards will be crucial for mitigating abiotic stress during the growing season. However, the environmental impact of irrigation requires consideration for ensuring its sustainability in the future. We evaluated the standard irrigation practices on grapevine water use efficiency, berry flavonoid composition, vineyard water footprint, and arbuscular mycorrhizal fungi-grapevine symbiosis in two seasons with contrasting amounts of precipitation. The irrigation treatments consisted of weekly replacement of 25, 50, and 100% of crop evapotranspiration (ETc) during two growing seasons. Irrigation in grapevine vineyards mitigated the water scarcity when precipitation during the dormant season was not sufficient. The results provided field data supporting that despite the low rainfall recorded in one of the seasons, increasing the amount of irrigation was not advised, and replacing 50% ETc was sufficient. In this treatment, berry composition was improved with increased contents of total soluble solids, anthocyanins, and flavonols, and a stable flavonoid profile without an economic decrease in yield. In addition, with 50% ETc, the mycorrhizal symbiosis was not compromised and water resources were not highly impacted. Altogether, our results provide fundamental knowledge for viticulturists to design an appropriate irrigation schedule under the future warming scenarios with minimal environmental impact in semi-arid regions facing warming trends.

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“…Qu is a plant flavanol, which is commonly found in fruits, vegetables, and beverages, such as grapes [25], oranges [26], strawberries [27], onions [28], tomatoes [29], peppers [30], lettuce [31], radish leaves [32], papaya [33], almonds and pistachios [34], and nuts [35], with a chemical structure shown in Figure 1. Qu has been named as 3,3,4,5,7-pentahydroxyflavone by the International Union of Pure and Applied Chemistry (IUPAC) [36,37].…”

Section: Introductionmentioning

confidence: 99%

Potential Therapeutic Targets of Quercetin, a Plant Flavonol, and Its Role in the Therapy of Various Types of Cancer through the Modulation of Various Cell Signaling Pathways

et al. 2021

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Polyphenolic flavonoids are considered natural, non-toxic chemopreventers, which are most commonly derived from plants, fruits, and vegetables. Most of these polyphenolics exhibit remarkable antioxidant, anti-inflammatory, and anticancer properties. Quercetin (Qu) is a chief representative of these polyphenolic compounds, which exhibits excellent antioxidant and anticancer potential, and has attracted the attention of researchers working in the area of cancer biology. Qu can regulate numerous tumor-related activities, such as oxidative stress, angiogenesis, cell cycle, tumor necrosis factor, proliferation, apoptosis, and metastasis. The anticancer properties of Qu mainly occur through the modulation of vascular endothelial growth factor (VEGF), apoptosis, phosphatidyl inositol-3-kinase (P13K)/Akt (proteinase-kinase B)/mTOR (mammalian target of rapamycin), MAPK (mitogen activated protein kinase)/ERK1/2 (extracellular signal-regulated kinase 1/2), and Wnt/β-catenin signaling pathways. The anticancer potential of Qu is documented in numerous in vivo and in vitro studies, involving several animal models and cell lines. Remarkably, this phytochemical possesses toxic activities against cancerous cells only, with limited toxic effects on normal cells. In this review, we present extensive research investigations aimed to discuss the therapeutic potential of Qu in the management of different types of cancers. The anticancer potential of Qu is specifically discussed by focusing its ability to target specific molecular signaling, such as p53, epidermal growth factor receptor (EGFR), VEGF, signal transducer and activator of transcription (STAT), PI3K/Akt, and nuclear factor kappa B (NF-κB) pathways. The anticancer potential of Qu has gained remarkable interest, but the exact mechanism of its action remains unclear. However, this natural compound has great pharmacological potential; it is now believed to be a complementary—or alternative—medicine for the prevention and treatment of different cancers.

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Impacts of leaf removal and shoot thinning on cumulative daily light intensity and thermal time and their cascading effects of grapevine (Vitis vinifera L.) berry and wine chemistry in warm climates

Cited by 34 publications

References 36 publications

Endophytic Bacterial Communities of Ginkgo biloba Leaves During Leaf Developmental Period

Endophytic Bacterial Communities of Ginkgo biloba Leaves During Leaf Developmental Period

Effects of Irrigation at Different Fractions of Crop Evapotranspiration on Water Productivity and Flavonoid Composition of Cabernet Sauvignon Grapevine

Potential Therapeutic Targets of Quercetin, a Plant Flavonol, and Its Role in the Therapy of Various Types of Cancer through the Modulation of Various Cell Signaling Pathways

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