Plant Cell Reports

, Volume 10, Issue 2, pp 81–84 | Cite as

Cell growth and water relations of the halophyte, Atriplex nummularia L., in response to NaCl

  • Ana M. Casas
  • Ray A. Bressan
  • Paul M. Hasegawa


Growth reduction or cessation is an initial response of Atriplex nummularia L. cells to NaCl. However, A. nummularia L. cells that are adapted to 342 and 428 mM NaCl are capable of sustained growth in the presence of salt. Cells that are adapted to NaCl exhibit a reduced rate of division compared to unadapted cells. Unlike salt adapted cells of the glycophyte Nicotiana tabacum L., A. nummularia L. cells do not exhibit reduced rate of cell expansion after adaptation. However, the cell expansion rate of unadapted A. nummularia L. cells is considerably slower than that of unadapted glycophyte cells and this normally low rate of cell expansion may contribute to the enhanced capacity of the halophyte to tolerate salt. Turgor of NaCl adapted cells was equivalent to unadapted cells indicating that the cells of the halophyte do not respond to salt by osmotic “over adjustment” as reported for the glycophyte tobacco (Binzel et al. 1985, Plant Physiol. 79:118–125).

Key words

Atriplex Cell suspension Salinity Growth 


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Copyright information

© Springer-Verlag 1991

Authors and Affiliations

  • Ana M. Casas
    • 1
  • Ray A. Bressan
  • Paul M. Hasegawa
  1. 1.Center for Plant Environmental Stress Physiology, Department of HorticulturePurdue UniversityWest LafayetteUSA

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