Research Results
Click a title below to view a research summary or narrow your search by entering a specific search term or topic. You can find research summaries keyword, funding year, primary investigator or category using the search boxes at right. Project summaries are available for every year since 1991.
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Evaluation of interactive effects of mechanical leafing and deficit irrigation on berry composition and wine chemistry of Vitis vinifera cv. Cabernet Sauvignon Grown in the San Joaquin Valley of California
Mechanical leafing at bloom and berry set either on one side…
Breeding, Genetics, and Germplasm Evaluation
The overall objective of this research project is to develop…
Spray-Induced Silencing of Grape Powdery Mildew Genes to Reduce Powdery Mildew Growth
Powdery mildews are widespread pathogens of grapevine that are…
Predicting Wine Ageability Using Iron Redox Reactions
In the initial reactions of the wine oxidation pathway, oxygen…
Measuring Grape Smoke Taint Protection
Smoke taint has become a recurring issue since 2008, and one…
Development of next generation rootstocks for California vineyards
Since my last report (June 2019) Nina Romero has made excellent…
Grape smoke exposure effects: Determining the compounds that cause smoke impacts in wine
The overall goal of this work is to identify those compounds…
Investigating Fruitiness Perception in Red and White wines
This provides results and conclusions from the entire project,…
Characterizing Willamette Valley Soil Moisture and Grapevine Response under Drying Seasonal Conditions
A commercial vineyard in the north Willamette Valley was selected…
Identification of smoke odorants by gas chromatography/olfactometry and assessment of smoke odorants in grapes and wine
Smoke taint has become a significant concern for the wine industry,…
Utilizing malolactic fermentation as a tool to prevent Brettanomyces bruxellensis wine spoilage
Brettanomyces bruxellensis is considered one of the most problematic…
Investigation of different winemaking protocols to mitigate smoke taint character in wine
Research regarding smoke taint has mostly been undertaken in…
Developing solar-induced chlorophyll fluorescence as a ground-based and remotely-sensed physiological indicator of grapevine stress
Upon having access to the funds, we initiated work in June 2019…
Persistence of Fungicide Resistance in Grape Powdery Mildew
The fitness of Erysiphe necator resistant to QoI/FRAC 11 fungicides…
Evaluation of Grapevine Rootstock Selections
The purpose of this project is to identify selections from a…
Interaction of red blotch virus (GRBV) and deficit irrigation on grapevine water relations, disease development, and vine productivity
The second year of a field experiment with two irrigation treatments…
The Role of Low-Molecular Weight Fungal Metabolites in Eutypa Dieback Grapevine Trunk Disease
This project focuses on understanding the fundamental chemistries…
Controlling Grapevine Trunk Diseases in California
A total of 20 vineyards belonging to 10 counties in California…
Characterization of Bitter and Astringent Proanthocyanidins during Winemaking
Polyphenols, including proanthocyanidins (i.e., tannins), are…
Developing an efficient DNA-free, non-transgenic Genome editing methodology in grapevine
Genome editing technology is a plant breeding innovation that…
Determining the role of Auxin-Response Factor 4 in the timing of ripening initiation in Vitis vinifera
The timing of ripening initiation is a major trait for wine grape…
Developing approaches to share, visualize, and model monitoring data to advance coordinated disease management efforts among grape growers
Our project goal is to support network-based learning to improve…
Deep Sequencing for Trunk Disease Diagnostics
The aim of this multi-year project was to develop rapid and cost-effective…
Integrating systems biology with marker assisted selection to guide the stacking of powdery mildew resistance genes
The long-term goal of this project is to develop grape varieties…
Extension and Outreach through UC Davis Viticulture and Enology On the Road Events
By the end of the 2018-2019 funding cycle, we produced the four…
Using a genome-scale metabolic model for Saccharomyces cerevisiae for understanding and modifying strain performance
Two key metabolic activities of yeast relevant to wine fermentations…
Development of a prediction tool for phenolic extraction in red wines as a function of winemaking practices and fermentor design
Red wine fermentations are performed in the presence of grape…
EVALUATING TRAITS TO IMPROVE GRAPEVINE WATER-USE EFFICIENCY AND DROUGHT TOLERANCE
Summary: The goal of this multi-year project is to identify leaf…
Improvement of Wine Quality: Tannin and Polymeric Pigment Chemistry
Summary
As we were breaking new ground from several perspectives,…
Development of a Tribology Method to Assess Mouth-feel Perceptions of Red Wines
We have successfully extracted and chemically characterized red…
Assessing Rootstock Biology and Water Uptake through Proximal Sensing under Different Wetting/Drying Conditions
Considering the importance of the water status as a driver of…
Determining the Impacts of Dormant Pruning Methods and Nitrogen Fertilization on Pinot Noir Bud Fruitfulness and Yield
This research evaluated the impacts that dormant pruning and…
Characterization of Aroma Volatiles and their Glyosidic Precursors in Grapes and Wines
Summary: The complex aroma of wine is derived from many sources,…
Rapid Determination of Molecular and “Truly Free” Sulfur Dioxide by Headspace Gas Chromatography
We completed development of an analytical procedure using headspace…
Oxidation of Wine: Central Role of Iron for Polyphenol Oxidation
We were able to find a quick and simple method to discriminate…
Rapid Analysis of Wine Phenolics by Laser-induced Fluorescence
Under the current grant, we conducted an initial evaluation of…
