Role of Aquaporins During Elongation Growth of Castor Bean Seedlings

  • Alfons R. Weig
  • Daniel A. Eisenbarth


When aquaporins were described as a molecular basis for transmembrane water flow in animal (Preston et al., 1992) and plant cells (Maurel et al., 1993), their physiological roles were often anticipated from their (subcellular) localisation with respect to the physiological process in the cell. However, these assumptions are difficult to prove and have been mainly restricted to gene knockout experiments in mice, yeast, and bacteria (reviewed in: Borgnia et al., 1999). Gene knockouts in plants are laborious and only feasible in a few plants. Moreover, the large number of homologous genes in plant genomes makes the finding of a clear phenotype difficult. Instead of analysing a single gene or protein, we have decided to investigate the role of aquaporins in hypocotyl cell elongation because parameters involved in this process can be measured easily and the rate of the elongation can be modulated.


Castor Bean Elongation Zone Elongation Growth Aquaporin Gene Plasma Membrane Intrinsic Protein 
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Copyright information

© Springer Science+Business Media New York 2000

Authors and Affiliations

  • Alfons R. Weig
    • 1
  • Daniel A. Eisenbarth
    • 1
  1. 1.Department of Plant PhysiologyUniversity of BayreuthBayreuthGermany

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