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The response of cucumber (Cucumis sativus L.) cultivated in the ion exchanger medium BIONA 312 to nickel

Maria Szymańska, Renata Matraszek, Anna Ziemba

Department of Plant Physiology
Agricultural University in Lublin
Akademicka 15, 20-950 Lublin, Poland
e-mail: metal@agros.ar.lublin.pl

The objective of the studies was to determine sensitivity of cucumber (Cucumis sativus L.) ‘Hermes’ to nickel, as well as the influence of ion exchanger BIONA 312 introduced to the soils contaminated with nickel on its bioavailability. BIONA 312 was introduced in the quantity making 0, 2 or 5% of substrate volume to the substrate contaminated with nickel (NiSO4) in doses: 0, 30, 75 mg Ni dm-3. The susceptibility of cucumber plants to nickel was determined at the florescence and fruiting stage on the grounds of some morphological traits, i.e. root volume, main axis length, number of lateral shoots, leaves, male and female flowers, fruits, as well as nickel content in shoots and roots and cucumber productivity. Nickel at so-called threshold quantities (30 mg dm-3) in the substrate caused significant decrease of female flowers number in florescence stage and severe drop of roots volume in fruiting stage. Also under conditions of higher nickel content (75 mg dm-3) there was recorded significant decrease of roots volume in fruiting stage. Moreover a complete lack of female and male flowers was observed, which resulted in a lack of fruit crop. Together with substrate contamination with nickel, its content in the cucumber shoots and roots significantly increased. BIONA 312 introduced to the contaminated medium significantly increased the productivity of roots, stems, leaves and fruits, the volume of roots, the main axis length, the number of lateral shoots, leaves, fruits, as well as male and female flowers. Simultaneously, the lower nickel content was recorded in cucumber biomass.

Szymańska M., Matraszek R., Ziemba A., 2004. The response of cucumber (Cucumis sativus L.) cultivated in the ion exchanger medium BIONA 312 to nickel. Folia Horticulturae 16/2: 17-26.