The aim of this experiment was to find the responses of Salicornia herbacea L, a halophyte plant , to high salt concentrations, and to understand the mechanism of its salt tolerance . S. herbacea was planted under the following salt regimes: 0, 3, 5, 10 and 20% NaCl . The results obtained were as follow: 1. Growth was highest under 3% and 5% NaCI plots 2. Salt was translocated from the root and distributed to the middle and upper part of the main stem . There was little accumulation found in

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... lower stem or root. 3. Salt content of the main stem from the 20% NaCI plot was lower than from the 10% plot . 4. X-ray microanalysis found NaCI accumulation in the large cells of the stem internode cortex , and a high Cl content in the node hinge. These results indicate that although this plant is a halophyte , in excessive saline conditions it acts to excrete salt, and such behaviour can be recognised as salt tolerance. The main stem nodes have a high salt tolerance and excrete salt to the surface of the plant tissue.