Abstract
Mucilage cells were generally distributed in the vegetative organs of dicotyledons. We tried to analyse the relationship which was unknown between mucilage cells and the frost resistance by plant tissue staining technique, semi-lethal temperature and freezing injury index in Sedum aizoon L.The results showed that the number of mucilage cells was significantly larger than control group in the leaves and stems with experimental group. The semi-lethal temperatures were -3.34°C and <-5°C, respectively, when the aboveground parts grew at 25°C and 5°C. Further, the freezing injury investigation was consistent with the above results, indicating the close relationship between mucilage cells and the frost resistance in aboveground parts of Sedum aizoon L.
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