Deformation of the stomata`s apparatus in cases of independent soil pollution by heavy metals of the rapeseed leaves
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Author: Todorov, Zhivko; Ivanova, Radka
Every year the agricultural lands, which have been polluted by heavy metals, increase continuously, however they should be used for the growing of various cultures. Number of authors found out that in cases of plant growing in industrially polluted regions, besides changes in the number of stomata, other visible changes in the sizes and deformations of the form occur as well. The goal of the present work is the observation and registration of the changes in the form of the stomata and the osteolum in the epithermal cells of the rapeseed leaves, which have occurred during independent pollution of the soil by Cu, Zn, Cd and Pb. The object of the present research is rapeseed (variety Votan - Germany), grown in containers in differently polluted soil. In cases of independent pollution, most frequently, the deformations consist of lack of one of the closing cells, incomplete or improper development of one of both of them or their excessive elongation. Specific and rarer deformations were observed, such as alignment of the chloroplasts in rows or two- or three- lateral conglomeration of the stomata.