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:
    non sort: A
    title: biosystematic study of the genus Erioneuron Nash (Poaceae, eragrostideae)
  name:
    name part: Valdes-Reyna, Jesus
    name part: 1948-
    role:
      role term: creator
  name:
    name part: Fryxell, Paul A.
    role:
      role term: degree committee member.
  name:
    name part: Hatch, Stephan L.
    role:
      role term: degree supervisor.
  name:
    name part: Johnston, Marshall C.
    role:
      role term: degree committee member.
  name:
    name part: Smeins, Fred E.
    role:
      role term: degree committee member.
  name:
    name part: Wilson, Hugh D.
    role:
      role term: degree committee member.
  name:
    name part: Texas A & M University
    role:
      role term: degree granting institution.
  type of resource: text
  genre: bibliography
  genre: Academic theses
  genre: Classification.
  origin info:
    place:
      place term: xx
    date issued: 1985
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: print
    extent: xiv, 178 leaves : illustrations ; 29 cm
  abstract: A biosystematic treatment was made of the New World genus Erioneuron. Materials for morphological, electrophoretic, anatomical, and cytological studies were collected from naturally occurring populations, and from herbarium specimens throughout the range of the species in this genus. The scanning electron microscope was used to examine the lemma micromophology of Erioneuron and 30 other genera of the Eragrostideae. The lemma surface of the genera of the tribe exhibited typical chloridoid characteristics. However, an unique and previously unreported silica deposition, called a silica pore, was observed. Four distinctive patterns of silica deposition were noted: 1) silica pore with silica cell, 2) silica pore without either the silica cell or prickle hair; 3) silica pore with siliceous papillae; and 4) silica pore not observed. These results show that the silica body distribution has taxonomic significance within the Eragrostideae tribe. A morphological analysis was made on 59 population samples of Erioneuron (sen. lat.). Phenetic and basic biostatistical techniques were used to delineate and define taxa. Based on these results, four distinct species were defined. An electrophoretic study was conducted on seedlings representing 33 natural populations. Individuals were assayed for five enzyme systems: PGI, GOT, IDH, PGM, and MDH. The results show that variation at the molecular is concordant with the morphological characters for the separation of taxa. Anatomical characters of both leaf epidermis and leaf cross-section were studied, and descriptions were made of the taxa. Differences between Erioneuron pulchellum and the other species of Erioneuron were evident on leaves studied in cross-section. Leaf anatomy was typical of the C4 photosynthetic pathway, specifically the NAD-me subtype. Based on these studies three species and seven varieties are recognized. Evidence gathered supports the recognition of Dasyochloa (D. pulchella) as a monotypic North American genus. The…
  note: "Major subject: Range Science."
  note: Typescript (photocopy).
  note: Vita.
  note: Ph. D. Texas A & M University 1985
  note: Includes bibliographical references (leaves 143-158).
  subject:
    topic: Grasses
    genre: Classification
  subject:
    topic: Major range science
  subject:
    topic: Grasses
  identifier: http://proxy.library.tamu.edu/login
  identifier: https://hdl.handle.net/1969.1/DISSERTATIONS-597393
  identifier: http://gateway.proquest.com/openurl
  related item:
    location:
      url: http://proxy.library.tamu.edu/login
  related item:
    location:
      url: https://hdl.handle.net/1969.1/DISSERTATIONS-597393
  related item:
    location:
      url: http://gateway.proquest.com/openurl
  record info:
    record content source: TXA
    record creation date: 870822
    record change date: 20220103135237.0
    record identifier: in00000585063
    language of cataloging:
      language term: eng