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The role of aquaporins in cellular and whole plant water balance

Författare

Summary, in English

Aquaporins are water channel proteins belonging to the major intrinsic protein (MIP) superfamily of membrane proteins. More than 150 MIPs have been identified in organisms ranging from bacteria to animals and plants. In plants, aquaporins are present in the plasma membrane and in the vacuolar membrane where they are abundant constituents. Functional studies of aquaporins have hitherto mainly been performed by heterologous expression in Xenopus oocytes. A main issue is now to understand their role in the plant, where they are likely to be important both at the cellular and at the whole plant level. Plants contain a large number of aquaporin isoforms with distinct cell type- and tissue-specific expression patterns. Some of these are constitutively expressed, whereas the expression of others is regulated in response to environmental factors, such as drought and salinity. At the protein level, regulation of water transport activity by phosphorylation has been reported for some aquaporins.

Publiceringsår

2000

Språk

Engelska

Sidor

324-342

Publikation/Tidskrift/Serie

Biochimica et Biophysica Acta - Biomembranes

Volym

1465

Issue

1-2

Dokumenttyp

Artikel i tidskrift

Förlag

Elsevier

Ämne

  • Biological Sciences

Nyckelord

  • Animals
  • Signal Transduction
  • Amino Acid Sequence
  • Aquaporins/chemistry/genetics/*metabolism
  • Biological Transport
  • Intracellular Membranes/metabolism
  • Cell Membrane/metabolism
  • Membrane Proteins/chemistry/metabolism
  • Isoelectric Point
  • Molecular Sequence Data
  • Molecular
  • Models
  • Molecular Weight
  • Phylogeny
  • Water-Electrolyte Balance
  • Plants/genetics/growth & development/*metabolism
  • Plant Components/metabolism
  • Protein Isoforms/metabolism
  • Plant Proteins/*metabolism

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 0005-2736