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: Plastidic Pi transporters in Arabidopsis thaliana
  name:
    name part: Irigoyen Aranda, Sonia Cristina.
    role:
      role term: creator
  name:
    name part: Versaw, Wayne K.
    role:
      role term: thesis advisor.
  type of resource: text
  genre: bibliography
  origin info:
    place:
      place term: txu
    date issued: 2012
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: remote
    extent: 1 online resource.
  abstract: Phosphorous in its inorganic form, orthophosphate (Pi), is found in every compartment of the plant cell and serves as a substrate, product or effector for a wide range of metabolic processes. Several Pi transporters exist in plants and these help regulate Pi homeostasis within different cellular compartments. The PHT4 family of organellar Pi transporters consists of six members in the model plant Arabidopsis thaliana, and five of these are localized to plastids. I used gene expression analyses and reverse genetics to demonstrate functional specialization for the PHT4 family members with a focus on PHT4;1 and PHT4;2. The PHT4;1 Pi transporter is localized to chloroplast thylakoid membranes and it is expressed in a circadian manner. Plants that lack a functional copy of the PHT4;1 gene have reduced rosette size and altered responses to photooxidative stress. The PHT4;2 transporter is localized to heterotrophic plastids in roots and other sink organs and pht4;2 mutants exhibit decreased starch accumulation, which is consistent with a defect in Pi export, and increased rosette size, which is caused by increased cell proliferation. These results confirm that PHT4;1 and PHT4;2 have specialized functions and that plastidic Pi homeostasis influences broad aspects of plant metabolism, including abiotic stress response and control of lateral organ growth.
  note: by Sonia Cristina Irigoyen Aranda.
  note: "Major Subject: Molecular and Environmental Plant Sciences"
  note: Electronic resource.
  note: Doctor of Philosophy Texas A&M University 2011 http://hdl.handle.net/1969.1/ETD-TAMU-2011-08-9898
  note: Includes bibliographical references.
  note: Text (Dissertation)
  subject:
    topic: Major Molecular and Environmental Plant Sciences
  subject:
    topic: Cell biology
  subject:
    topic: Cell proliferation
  subject:
    topic: Plant phosphate transporters
  subject:
    topic: Starch metabolism
  subject:
    topic: Plastids
  identifier: http://hdl.handle.net/1969.1/ETD-TAMU-2011-08-9898
  record info:
    record content source: TXA
    record creation date: 121126
    record change date: 20150922145609.0
    record identifier: in00002785178