Solute distribution in Suaeda maritima

The distribution of sodium, potassium and glycinebetaine in shoot tissues of salt-treated Suaeda maritima was examined by semi-micro techniques after extraction into toluene-water. Much higher K/Na ratios were observed in the apical regions and in axillary buds than in more mature, fully vacuolated...

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Bibliographic Details
Published in:Planta 1983-01, Vol.157 (4), p.344-349
Main Authors: Gorham, J, Wyn Jones, R.G
Format: Article
Language:English
Subjects:
Cytoplasm
Leaves
Mesophyll cells
Microanalysis
plant biochemistry
Plant cells
plant physiology
Plants
Salt tolerance
Solutes
Table salt
Vacuoles
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Summary:The distribution of sodium, potassium and glycinebetaine in shoot tissues of salt-treated Suaeda maritima was examined by semi-micro techniques after extraction into toluene-water. Much higher K/Na ratios were observed in the apical regions and in axillary buds than in more mature, fully vacuolated tissues. The younger tissues also contained very high levels of glycinebetaine. Electron-probe X-ray microanalysis of bulk-frozen and fractured preparations showed higher K/Na ratios and higher levels of sulphur and phosphorus in the cytoplasm of leaf primordial cells than in vacuoles of either young or old leaves, although the total counts were higher in the vacuolar samples. The results are discussed in relation to current models of subcellular solute compartmentation and salt tolerance in the Chenopodiaceae.
ISSN:0032-0935
1432-2048
DOI:10.1007/BF00397406