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Systematics and evolution of bark-inhabiting species of the Gnomoniaceae (Diaporthales, Ascomycota) with emphasis on the genera Cryptosporella and Plagiostoma

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TypeOfResource
Text
TitleInfo (ID = T-1)
Title
Systematics and evolution of bark-inhabiting species of the Gnomoniaceae (Diaporthales, Ascomycota) with emphasis on the genera Cryptosporella and Plagiostoma
SubTitle
PartName
PartNumber
NonSort
Identifier (displayLabel = ); (invalid = )
ETD_2121
Identifier (type = hdl)
http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.000051875
Language (objectPart = )
LanguageTerm (authority = ISO639-2); (type = code)
eng
Genre (authority = marcgt)
theses
Subject (ID = SBJ-1); (authority = RUETD)
Topic
Plant Biology
Subject (ID = SBJ-2); (authority = ETD-LCSH)
Topic
Gnomoniaceae
Subject (ID = SBJ-3); (authority = ETD-LCSH)
Topic
Diaporthales
Subject (ID = SBJ-4); (authority = ETD-LCSH)
Topic
Plants--Diseases and pests
Abstract
The Gnomoniaceae (Diaporthales, Ascomycota) comprise microfungi that grow on leaves and woody tissues of a range of plant families, mostly hardwood trees from temperate zones of the northern hemisphere. Many dominant endophytes of trees in North America and Europe are species of Gnomoniaceae. Several emerging and devastating diseases of forest trees are caused by pathogenic species of Gnomoniaceae. Despite their abundance and impact in forest ecosystems, the Gnomoniaceae have not received modern taxonomic review and phylogenetic study. Most morphologically defined genera in this family are polyphyletic when analyzed with molecular data, therefore new circumscription of genera is needed.
The objectives of this work are to: 1) define monophyletic genera and determine species limits for bark-inhabiting fungi in the Gnomoniaceae; and 2) infer the phylogeny of bark-inhabiting genera of Gnomoniaceae (e.g. Cryptosporella, and Plagiostoma). To achieve these objectives fresh specimens were collected in locations in Europe, North, Central and South America, and China. Specimens from herbaria and living collections from culture repositories were included in the study. The methods integrate a comparison of morphological characters of specimens in natural substrates such as the arrangement, shape, and size of perithecia and the shape and size of asci and ascospores with molecular characters, i.e. DNA sequences from multiple loci (β-tubulin, ITS, LSU, rpb2, and tef1-α) analyzed by Bayesian inference, Maximum Likelihood, Neighbor Joining, and Parsimony.
This research resulted in the recircumscription of the genera Cryptosporella and Plagiostoma and the definition of a new genus Occultocarpon gen. nov. A total of 32 taxonomic novelties were defined. More specifically, 17 new species, a new genus of bark-inhabiting Gnomoniaceae, and 14 new name combinations were described. This project has shown that host identity is a better predictor than geographic location for finding species of Gnomoniaceae. By documenting species of Gnomoniaceae from the Neotropics, South America, and subtropical China, results from this project have changed the previous assumption that the Gnomoniaceae only occur in temperate zones of the Northern Hemisphere. Finally, the phylogenies obtained suggest a long evolutionary relationship between Cryptosporella and Betulaceae and a subclade of Plagiostoma with the Salicaceae.
PhysicalDescription
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electronic resource
Extent
xii, 231 p. : ill.
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application/pdf
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Note (type = degree)
Ph.D.
Note (type = bibliography)
Includes bibliographical references
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by Luis Carlos Mejía Franco
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Mejía Franco
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Luis Carlos
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1975-
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Luis Carlos Mejia Franco
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White
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James
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chair
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Advisory Committee
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James F. White
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Struwe
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Lena
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internal member
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Advisory Committee
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Lena Struwe
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Gianfagna
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Thomas
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Thomas Gianfagna
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Castlebury
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Lisa
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Lisa A. Castlebury
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Rossman
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Amy
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outside member
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Advisory Committee
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Amy Y. Rossman
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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
OriginInfo
DateCreated (point = ); (qualifier = exact)
2009
DateOther (qualifier = exact); (type = degree)
2009-10
Place
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xx
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Title
Rutgers University Electronic Theses and Dissertations
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ETD
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Title
Graduate School - New Brunswick Electronic Theses and Dissertations
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rucore19991600001
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NjNbRU
Identifier (type = doi)
doi:10.7282/T33J3D4F
Genre (authority = ExL-Esploro)
ETD doctoral
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The author owns the copyright to this work
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Copyright protected
Notice
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Availability
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Open
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Permission or license
Note
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Mejía Franco, Luis
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Luis Mejía Franco
Affiliation
Rutgers University. Graduate School - New Brunswick
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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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