CYTOGENETIC ASPECTS HIGHLIGHTED IN MERISTEMATIC TISSUES OF CUCUMBERS (CUCUMIS SATIVUS) UNDER ACTION OF COPPER SULPHATE

E. BONCIU, I. SARAC, P. IANCU

Abstract


The frequent use of pesticides in agriculture, as well as alarming increase of pollution of the ecosystems, justify the assessment of the cytotoxicity of these polluting agents on plants. Copper sulphate is used for the control of downy mildew to vegetables, fruit trees and vines. From this point of view, it is very often used in cucumber crops to combat downy mildew produced by the fungus Pseudoperonospora cubensis. The purpose of research was to assess the influence of copper sulphate on cytological activity in radicular meristematic tissues to Cucumis sativus (cucumber), one of the most popular vegetables for its freshness. The study reveals the mitodepresive effect of copper sulphate as well as a direct correlation between its concentration and the frequency of cytogenetic changes (sticky chromosomes, vagrant chromosomes, micronucleus, C-mitosis) identified in the meristematic tissues of Cucumis sativus. This suggests caution in the excessive use of copper sulphate for plant protection and, in particular, strict adherence to treatment concentrations.


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