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: Nitrate reductase activity in cotton cotyledons
    sub title: studies on in vitro stabilization and in vivo regulation
  name:
    name part: Tischler, Charles Raymond.
    role:
      role term: creator
  name:
    name part: Jordan, Wayne R.
    role:
      role term: degree supervisor.
  name:
    name part: Ketring, D. L.
    role:
      role term: degree committee member.
  name:
    name part: Morgan, P. W.
    role:
      role term: degree committee member.
  name:
    name part: Purvis, A. C.
    role:
      role term: degree committee member.
  name:
    name part: Stipanovic, R. 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
  origin info:
    place:
      place term: txu
    date issued: 1976
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: print
    extent: xi, 78 leaves ; 28 cm
  abstract: Cotyledons from germinating cotton seedlings exhibit an early period of nitrate reductase (NR) activity (approximately 28 hr following the initiation of imbibition) which is stable in vitro. By day 3 this activity has essentially disappeared from the cotyledons, but it is replaced (day 4 and beyond) by NR activity which is liable in vitro. Casein, bovine serum albumin (BSA), and boiled extract from 2-day old cotton cotyledons are all capable of stabilizing labile NR from older cotton cotyledons and leaves of corn, bean, and watermelon to some degree. This stabilization is not mediated by donation of a catalytic subunit to the NR molecule, but involves either donation of a structural subunit, or a general stabilization resulting from increased concentration of protein (or other factors) in solution. The three substances also "enhance" NR activity above levels of comparable buffer dilutions. This "enhancement" appears to result from the competition of casein, BSA, and the boiled extract for inhibitors initially bound to NR. After day 3, NR activity in cotton cotyledons exhibits a marked circadian variation, with maximum activity being observed approximately 6 hr into the light period. Although in vitro activity from such cotyledons is labile, the current investigation does not support an active role of proteases in modulating NR activity for three distinct reasons..
  note: by Charles Raymond Tischler.
  note: "Major Subject: Plant Physiology."
  note: Vita.
  note: Texas A & M University
  note: Includes bibliographical references (leaves 69-73).
  subject:
    topic: Cotton
  subject:
    topic: Nitrates
    topic: Physiological effect
  subject:
    topic: Plant Physiology
  subject:
    topic: Cotton
  subject:
    topic: Nitrates
    topic: Physiological effect
  identifier: http://proxy.library.tamu.edu/login
  identifier: https://hdl.handle.net/1969.1/DISSERTATIONS-508800
  related item:
    location:
      url: http://proxy.library.tamu.edu/login
  related item:
    location:
      url: https://hdl.handle.net/1969.1/DISSERTATIONS-508800
  record info:
    record content source: TXA
    record creation date: 761008
    record change date: 20220103135048.0
    record identifier: in00000509331
    language of cataloging:
      language term: eng