Population fluctuations of Glaux maritima, along a transect on a Baltic sea shore meadow, were recorded between 1979 and 1983. A bimodal distribution in numbers along the transect reflects the variation in factors regulating numbers: The two maintenance systems of the species, vegetative propagation
Solute distribution inSuaeda maritima
✍ Scribed by J. Gorham; R. G. Wyn Jones
- Book ID
- 104756208
- Publisher
- Springer-Verlag
- Year
- 1983
- Tongue
- English
- Weight
- 701 KB
- Volume
- 157
- Category
- Article
- ISSN
- 0032-0935
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✦ Synopsis
The distribution of sodium, potassium and glycinebetaine in shoot tissues of salt-treated Suaeda mavitima 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 bulkfrozen 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.
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