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: The
    title: effect of 2, 4-dichlorophenoxyacetic acid on the activity of phosphofructokinase in Vigna unguicula (L.) Walp. leaf tissue
  name:
    name part: Allen, Thomas Jefferson.
    role:
      role term: creator
  name:
    name part: Camp, Bennie J.
    role:
      role term: degree committee member.
  name:
    name part: Joham, H. E.
    role:
      role term: degree committee member.
  name:
    name part: Leinweber, C. L.
    role:
      role term: degree supervisor.
  name:
    name part: Morgan, Page W.
    role:
      role term: degree committee member.
  name:
    name part: Sperry, O. E.
    role:
      role term: degree committee member.
  name:
    name part: Texas A & M University
    role:
      role term: degree granting institution.
  type of resource: text
  genre: theses
  genre: Academic theses.
  origin info:
    place:
      place term: txu
    date issued: 1969
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: print
    extent: 56 leaves
  abstract: Phosphofructokinase (PFK) activity was found in all cowpea leaf tissue preparations. Phosphofructokinase activity in non-treated plant tissue preparations harvested during the light period was competitively inhibited. Preparations collected during the dark period from non-treated leaf tissue contained approximately 70% higher activity than non-treated leaf tissue preparations harvested in the light. Treatment of cowpea plants with a 4.5 x 10⁻⁴M sodium salt of 2,4-D solution resulted in equalization of PFK activity in both the light and dark harvested leaf tissue. It was suggested that PFK activity in the leaves of cowpea plants was controlled by a photoresponse or by a metabolic product which is under the influence of light. The data reported supports the energy concept of 2,4-D action. Monophosphorylated sugar concentration was inversely correlated with PFK activity at the 5% level of probability. Herbicide treatment resulted in a shift to a higher concentration of monophosphorylated sugars from the light to the dark period. The shift to a higher concentration may have resulted from a shift on the type of carbohydrate metabolism. The concentration of diphosphorylated sugar was directly correlated with PFK activity. For 10 to 14 hours after herbicide application diphosphorylated sugar occurred at a low level. This low level could be attributed to an increased rate of respiration. Free sugar concentration fluctuated erratically throughout the experimental period. However, the free sugar concentration in 2,4-D treated tissue was equal to or higher than the concentrations in the extracts form non-treated tissue. This could indicate a stimulation of photosynthesis or a stimulation of starch and sucrose hydrolysis as a result of sub-lethal treatment with 2,4-D.
  note: Ph. D. in Range Science Texas A & M University
  subject:
    topic: Major range science
  identifier: http://proxy.library.tamu.edu/login
  identifier: https://hdl.handle.net/1969.1/DISSERTATIONS-173713
  related item:
    location:
      url: http://proxy.library.tamu.edu/login
  related item:
    location:
      url: https://hdl.handle.net/1969.1/DISSERTATIONS-173713
  record info:
    record content source: TXA
    record creation date: 791119
    record change date: 20220103135054.0
    record identifier: in00000164591
    language of cataloging:
      language term: eng