Scientific Research and Essays

  • Abbreviation: Sci. Res. Essays
  • Language: English
  • ISSN: 1992-2248
  • DOI: 10.5897/SRE
  • Start Year: 2006
  • Published Articles: 2754

Full Length Research Paper

Ionic and water relations of Sesuvium portulacastrum (L.)

B. Moseki* and J. C. Buru
University of Botswana, Department of Biological Sciences, Private Bag UB 00704, Gaborone, Botswana.
Email: [email protected]

  •  Accepted: 27 June 2007
  •  Published: 31 January 2010

Abstract

The aim of this study was to assess the growth response of Sesuvium portulacastrum (L.) (a halophyte) to various NaCl concentrations and hence determine how it is adapted to grow optimally under saline conditions. S. portulacastrum was grown hydroponically in various NaCl concentrations (that is, 0, 100, 200, 400 and 600 mol m-3 NaCl). It was found to exhibit a growth pattern typical of dicotyledonous halophytes. It attained maximal growth at 200 mol m-3NaCl concentration in hydroponic cultures. It accumulated large concentrations of Na+ and Clwith the leaves having the highest ion content. These ions are believed to be sequestered in the vacuole. S. portulacastrum also accumulated proline in high concentrations and this proline appeared to adjust the cytoplasmic ion concentration to balance that of the vacuole.

 

Key words: Sesuvium portulacastrum, halophyte, proline, salinity.