VEGETATIVE GROWTH OF COMMON BEAN cv.'BRSMG MADREPEROLA ' CULTIVATED ON SOIL CONTAMINATED WITH CHROMIUM

摘要

Chromium (Cr) is a chemical element found in several components in the biosphere. In the biotic environment, the metal can be found since in unicellular organisms until complex beings such as animals and plants. It may in some cases be part of metabolic processes which are vital to organisms. Cr is found in the environment in the oxidation states III and VI, being the last one with more severe toxic effects to humans and plants. The effects of Cr (VI) are more severe, due to its higher mobility in soil, its greater ability to penetrate tissues and in addition, to the oxidative and mutagenic potential. Cr (VI) has degenerative effect on cells, promoted by the reaction with nucleic acids of unstable compounds, which are formed inside the cells duringthe reduction process of Cr. Considering the toxic effect of Cr and the agricultural potential of cv. BRSMG Madreperola, this study aimed to evaluate the effect of Cr on the vegetative growth of bean.