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Studies on secondary metabolites associated with witches' broom disease, floral biology, and seed fermentation in cacao
Descriptive
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Title
Studies on secondary metabolites associated with witches' broom disease, floral biology, and seed fermentation in cacao
Name
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Chaves
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Fábio C.
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Fábio C. Chaves
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author
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Gianfagna
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Thomas
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Advisory Committee
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Thomas J Gianfagna
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chair
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White Jr.
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James
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Advisory Committee
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James White Jr.
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internal member
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Huang
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Bingru
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Advisory Committee
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Bingru Huang
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internal member
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Hebbar
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Prakash
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Advisory Committee
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Prakash Hebbar
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outside member
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Rutgers University
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degree grantor
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Graduate School - New Brunswick
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school
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Text
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theses
OriginInfo
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2008
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2008-05
Language
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English
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electronic
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xiv, 227 pages
Abstract
Theobroma cacao L., a tree native to the Amazon, is cultivated in the tropics throughout the world for its seeds, used primarily for chocolate production. Cacao production is limited by several problems. Cocoa pod borer, an insect that burrows through pods, damages seeds, allowing contamination by toxigenic fungal species. Many fungal diseases infect cacao. Among them, Moniliophthora perniciosa, the causal agentof witches' broom disease, severely affects plantations throughout South America and the Caribbean. Cacao yields are further limited by the naturally low rates of fruit set. Moreover, disease tolerant varieties are usually self-incompatible low producers and do not give a superior chocolate flavor compared to some disease susceptible and selfcompatible
genotypes with highly valued aroma compounds.
During this project, problems associated with three main aspects of cacao were investigated: disease, production and processing. Studies on plant-endophyte-pathogen interactions allowed for the identification of new possible mechanisms of disease control; studies on cacao flower physiology indicated ways to improve pollination and therefore increase fruit set and crop yield; and investigations of the fermentation step of cacao processing permitted discovery of a method for maintaining higher levels of compounds valued by cacao manufacturers.
Flavan-3-ol monomers and oligomers, purine alkaloids and salicylic acid, volatile organic compounds, polyketides and other phenolic compounds were among the determined bioactive compounds found in cacao, pathogens and endophytes, with influence on disease, production, and processing.
genotypes with highly valued aroma compounds.
During this project, problems associated with three main aspects of cacao were investigated: disease, production and processing. Studies on plant-endophyte-pathogen interactions allowed for the identification of new possible mechanisms of disease control; studies on cacao flower physiology indicated ways to improve pollination and therefore increase fruit set and crop yield; and investigations of the fermentation step of cacao processing permitted discovery of a method for maintaining higher levels of compounds valued by cacao manufacturers.
Flavan-3-ol monomers and oligomers, purine alkaloids and salicylic acid, volatile organic compounds, polyketides and other phenolic compounds were among the determined bioactive compounds found in cacao, pathogens and endophytes, with influence on disease, production, and processing.
Note
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Ph.D.
Note
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Includes bibliographical references (p. 210-225).
Subject
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Topic
Plant Biology
Subject
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Topic
Cacao
Subject
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Topic
Cacao--Diseases and pests
Subject
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Topic
Witches’ broom disease
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Graduate School - New Brunswick Electronic Theses and Dissertations
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rucore19991600001
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http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.17285
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ETD_872
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NjNbRU
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doi:10.7282/T3FQ9X0Z
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ETD doctoral
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Rights
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The author owns the copyright to this work.
Copyright
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Copyright protected
Availability
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Open
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Name
Fabio Chaves
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Copyright holder
Affiliation
Rutgers University. Graduate School - New Brunswick
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Non-exclusive ETD license
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Author Agreement License
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I hereby grant to the Rutgers University Libraries and to my school the non-exclusive right to archive, reproduce and distribute my thesis or dissertation, in whole or in part, and/or my abstract, in whole or in part, in and from an electronic format, subject to the release date subsequently stipulated in this submittal form and approved by my school. I represent and stipulate that the thesis or dissertation and its abstract are my original work, that they do not infringe or violate any rights of others, and that I make these grants as the sole owner of the rights to my thesis or dissertation and its abstract. I represent that I have obtained written permissions, when necessary, from the owner(s) of each third party copyrighted matter to be included in my thesis or dissertation and will supply copies of such upon request by my school. I acknowledge that RU ETD and my school will not distribute my thesis or dissertation or its abstract if, in their reasonable judgment, they believe all such rights have not been secured. I acknowledge that I retain ownership rights to the copyright of my work. I also retain the right to use all or part of this thesis or dissertation in future works, such as articles or books.
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