rdf-syntax-grammar
mods:
  schema location: http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
  title info:
    title: Citrus tristeza virus
    sub title: characterization of Texas isolates, studies on aphid transmission and pathogen-derived control strategies
  name:
    name part: Herron, Caroline Mary
    name part: 1959-
    role:
      role term: creator
  name:
    name part: da Graca, John
    role:
      role term: thesis advisor.
  name:
    name part: Scholthof, Herman B.
    role:
      role term: thesis advisor.
  type of resource: text
  genre: bibliography
  origin info:
    place:
      place term: txu
    date issued: 2003
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: electronic
    form: remote
  abstract: Citrus tristeza virus (CTV), an economically important graft-transmissible pathogen of citrus, causes major global declines in citrus production. In the commercial citrus of the Lower Rio Grande Valley of Texas (LRGV), where red grapefruit on tristeza-decline sensitive sour orange rootstocks predominate, incidence of CTV is low. The efficient CTV vector, the brown citrus aphid (BrCA, Toxoptera citricida Kirkaldy) is now established in Mexico and Florida, thus information is needed on the severity of CTV, CTV aphid transmission and the performance of transformed citrus towards CTV before T. citricida arrives in Texas so that appropriate management strategies can be selected. Biological indexing and molecular typing were performed on fifteen Texas CTV isolates. The majority of the CTV isolates tested contained the most severe CTV types known. In Florida, T. citricida were fed on crude CTV preparations in vitro and could transmit CTV to virus-free receptor plants with two CTV isolates, whereas a more highly purified CTV preparation from one CTV isolate was not transmitted by T. citricida. There were no differences in the majority of treatments in infectivity neutralizations using three CTV-derived antibodies (p25, p27 and p20). CTV p20 antibodies significantly enhanced the occurrence of CTV transmission in one test. The CTV genome of isolate H33 was sequenced using 'shot gun' methods. The H33 major component and H33 minor components were phylogenetically compared to the six other full-length CTV sequences. An untranslatable CTV coat protein gene was genetically transformed into the genome of the Texas commercial Rio Red grapefruit variety, and fifty-two independent transgenic lines were produced. CTV challenge responses by the transgenic lines were variable. Individual plants could be identified which had low virus titers by ELISA detection, a temporal decrease in virus titer, or a delay in virus titer accumulation. Comparing all wild types to all transgenic lines over…
  note: by Caroline Mary Herron.
  note: "Major Subject: Plant Pathology"
  note: Title from author supplied metadata (automated record created on Oct. 15, 2004.)
  note: Vita.
  note: Abstract.
  note: Electronic resource.
  note: Mode of access: World Wide Web.
  note: System requirements: World Wide Web access and Adobe Acrobat Reader.
  note: Ph. D. Texas A&M University 2003.
  note: Includes bibliographical references.
  note: Text (Dissertation).
  subject:
    topic: Major Plant Pathology
  subject:
    topic: Citrus tristeza virus
  subject:
    topic: Toxoptera citricida
  subject:
    topic: the brown citrus aphid
  subject:
    topic: transgenic citrus
  subject:
    topic: pathogen-derived resistance
  subject:
    topic: marafiviruses
  identifier: http://hdl.handle.net/1969.1/1198
  record info:
    record content source: TXA
    record creation date: 050302
    record change date: 20151101052837.0
    record identifier: in00002037741