Soluble Solids, Acidity, Canopy Fruit Distribution, and Disease Susceptibility of Selected Grape Cultivars in Quebec

Khanizadeh, Shahrokh; Rekika, Djamila; Porgès, Laetitia; Levasseur, A.; Groleau, Yvon; Fisher, Helen

doi:10.1080/15538360802529781

Cited by 3 publications

(2 citation statements)

References 13 publications

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“…In Quebec, a few studies focused on the impact of different agricultural practices on parameters such as cold tolerance [13], disease susceptibility [14], maturity and fruit quality [15], but most studies focused on agronomic aspects rather than wine production. Yet knowledge of the volatile compounds of Vitis varieties is crucial for optimizing the quality of wines.…”

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confidence: 99%

Volatile Compounds from Must and Wines from Five White Grape Varieties

Slegers¹,

Angers²,

Pedneault³

2017

J Food Chem Nanotechnol

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Viticulture and wine production in challenging environments such as cold and humid areas has substantially expanded in recent years, mostly due to the development of grapevine varieties that show high resistance to fungal diseases and cold temperatures. These interspecific hybrid Vitis (IHV) varieties result from multiple crosses between Vitis vinifera varieties and North American native species such as V. riparia and V. labrusca. Limited scientific information is available on the aroma and winemaking of IHV, and about the relationships between grape and wine composition in regard to compounds of enological interest. In this work, the profile of volatile compounds of grapes and wines from five white IHV varieties largely grown in cold-climate viticulture (Frontenac blanc, Frontenac gris, Seyval, St. Pepin and Vidal) was determined by GC-MS-SPME. Compound classes detected in juice and wine included fatty acid degradation products that represented the largest part of volatile compounds, fatty acid ethyl esters, terpenes, C 13 -norisoprenoids, and volatile phenols and other phenyl derivatives. The flavor profile of Vidal showed the largest diversity of compounds in both juice and wine, and the overall highest amount of volatile compounds of all varieties. Principal component analysis showed relationships between the presence of certain C 6 compounds, terpene and volatile phenols in musts and in the finished wines.

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mentioning

confidence: 99%

Volatile Compounds from Must and Wines from Five White Grape Varieties

Slegers¹,

Angers²,

Pedneault³

2017

J Food Chem Nanotechnol

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“…This could be due to a number of factors, including differences in Vitis vinifera cultivars versus Vitis interspecific hybrid cultivars tested as well as differences in climate and site. Vitis vinifera cultivars are generally less winter hardy and more susceptible to diseases (Khanizadeh et al 2008, Reisch et al 1993. For instance, Vitis riparia has transcriptional components that are involved in its resistance to Downy mildew caused by Plasmopara viticola.…”

Section: Discussionmentioning

confidence: 99%

Grapevine trunk disease in Missouri vineyards : prevalence and causality of fungal species by cultivar

Serra

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Grapevine Trunk Disease (GTD) is an emerging fungal disease complex in vineyards worldwide. In 2019, pruning wood samples from a research vineyard in New Franklin, MO were collected from nine cultivars of Vitis interspecific hybrid cultivars, in which GTD pathogens were found at various frequencies depending on the cultivar. DNA was extracted from 48 individual isolates and submitted for Sanger Sequencing. White grape cultivars (63 [percent]) had significantly higher percentage of GTD than red grape cultivars (27 [percent]) (p [less than] 0.001). Cultivar Aromella had the highest percentage of GTD pathogens (88 [percent]), while Prophecy had the lowest percentage of GTD pathogens in its sample vines (12 [percent]). The more prevalent GTD pathogens in the samples (Diplodia seriata, Neofusicoccum parvum, Neofusicoccum ribis, and Pestalotiopsis uvicola) were then subjected to Koch's Postulates, which is the plant pathology method for determining whether an organism causes a disease. Koch's Postulates were evaluated in a greenhouse by inoculating shoots of Vitis interspecific hybrid cultivar Vignoles, the most widely planted white grape cultivar in Missouri. Shoots were inoculated and placed in a greenhouse for ten days. All shoots inoculated with the fungal endophytes displayed symptoms of GTD, including brown tissue around the wound site, demonstrating that these regionally prevalent endophytes can rapidly cause symptoms consistent with GTD on young Vignoles vines. Examining the differing prevalence of these GTD-causing pathogens in various interspecific hybrid cultivars will aid in the development of cultivar-specific management strategies for GTD. In a separate experiment, a survey of the incidence and severity of symptomatic vines was conducted at a commercial vineyard in Missouri. This site contained a block of Vitis interspecific hybrid cultivar Vidal blanc being removed, with much of the vines showing symptoms of GTD in the vascular tissue of the trunks. This research sought to evaluate the disease severity from the trunks in the vines being rogued. Although there was no statistical significance between the severity ratings and fungal species recovered from Vitis interspecific hybrid cultivar Vidal blanc samples (p [equals] 0.7153), 90 [percent] of the randomly sampled vines showed visual GTD symptoms, including cankers and brown discoloration of wood. The experiments reveal that Vitis interspecific hybrid cultivars may have varying susceptibilities to GTD pathogens, with white cultivars having a higher incidence than the red cultivars studied. Additionally, young Vignoles vines can show symptoms of GTD in just 10 days after inoculation with four GTD pathogens. Both of these results have management implications, in that cultivars may need to be managed differently for GTD depending on whether they are a red or white grape cultivar, and sanitation practices may need to be initiated at the time of planting to prevent the development of GTD symptoms in young vines.

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Fungus resistant grape varieties as a suitable alternative for organic wine production: Benefits, limits, and challenges

Pedneault¹,

Provost

2016

Scientia Horticulturae

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Soluble Solids, Acidity, Canopy Fruit Distribution, and Disease Susceptibility of Selected Grape Cultivars in Quebec

Cited by 3 publications

References 13 publications

Volatile Compounds from Must and Wines from Five White Grape Varieties

Volatile Compounds from Must and Wines from Five White Grape Varieties

Grapevine trunk disease in Missouri vineyards : prevalence and causality of fungal species by cultivar

Fungus resistant grape varieties as a suitable alternative for organic wine production: Benefits, limits, and challenges

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