Date of Award

Fall 2005

Document Type

Thesis

Degree Name

Master of Science (MS)

Department

Chemistry & Biochemistry

Program/Concentration

Chemistry

Committee Director

Roy L. Williams

Committee Member

Mark S. Elliot

Committee Member

James H. Yuan

Call Number for Print

Special Collections LD4331.C45 M34 2005

Abstract

Grapevine disease has been thc subject of intense research amongst viticulturists over the last few decades, especially during the 1990's. There has been discoveries that suggest grapevine disease is commonly caused by fungal pathogens. One of the most common fungi that the vine may become infected by is known as Botrytis cinerea. B. cinerea is capable of attacking the grapevine which in turn will lead to bunch rot in the grape clusters. This disease has been researched in great detail during the past several years and is one of only few microorganisms that have actually been identified. Phaeoacremrmium chnlmydospnrum is another fungal pathogen that affects grapevines. This fungal pathogen is the culprit that leads to the young vine decline disease in grapevines. The microorganism has the ability of infiltrating through a pruning wound on the trunk of the vine and then subsequently interacts with vine phytoalexins as the vine tries to counteract the invading pathogen. As a result, the xylem exudes a darkly colored viscous substance that is known as Black Goo. Black Goo is an obtrusive substance that inhibits the vine's vasculature so that nutrient flow is reduced. This thesis will shed light on the chemical composition of the Black Goo exudate and the relationship with the fungal mechanisms in the plant. This research will present evidence that P. cjtalmydosporum may have the ability to produce trans-resveratrol and certain natural viniferins which may be associated with the principle of self-intoxication and the progress of the fungal infection.

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DOI

10.25777/mypc-2f43

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