Folia Horticulturae

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The effect of aluminium on early development stages of Cucumis sativus L.

Maria Szymańska, Jolanta Molas

Department of Plant Physiology
Agricultural University
Akademicka 15, 20-950 Lublin, Poland

The effect of Al concentrations of 1, 5, 10, 20, 30 and 40 mg dm3, with a medium of pH 4.2, on the seed germination and growth of cucumber seedlings of the cultivar Wisconsin was studied. Besides, Al content was determined in the germinating seeds and roots of 4- and 8-day seedlings as well as its location in cells, tissues, and different root zones and anatomical layers. Aluminium in the studied range of concentrations affected the process of seed germination non-significantly. In this stage it was identified only in the seed coats. At the concentrations of 1 and 5 mg Al dm3 stimulated cucumber seedling growth, causing no morphological or developmental anomalies. In these conditions the Al content in the roots of 4- and 8-day seedlings was low. Using the histochemical reaction with aluminon, aluminium was identified on the external surface of the cap and root epidermis as well as in the 1st to 3rd layers of primordial cortex cells. At 20-40 mg Al dm3 inhibited seedling growth and caused damage to them. The presence of Al was found in all the anatomical layers of the root. In the cells aluminium was situated in the walls, nucleus, and nucleolus, and in the case of the highest concentration of Al (40 mg dm3) also in the cell cytoplasm. In the roots growing on a medium with a high concentration of Al (20, 30, 40 mg dm3) an increased amount of this metal appeared after four days of seedling cultivation.

Szymańska M., Molas J., 1996. The effect of aluminium on early development stages of Cucumis sativus L. Folia Horticulturae 8/1: 73-83.