Efectul cuprului asupra creşterii şi dezvoltării răsadurilor la specia Alyssum murale

The aim of the undertaken research was to study the influence of copper on the seedling growth and development for the Alyssum murale species.The experiment was organized in 2 kg soil containers, in 4 variants of 4 repetitions, each repetition having 100 seeds. In order to study the influence of copper on the growth and development of the seedlings, the following doses were used: variant V1-20ppm , variant V2-100ppm, variant V3-200ppm and variant V4-500ppm. The toxicity of copper was determined through biometric determinations: stem height number of leaves, internode length, mean length of the main stem, number and mean length of secondary roots and the photosynthetic pigments content by using the spectrophotometric method. The increase in copper concentration has induced a reduction of the mean plant height, the differences obtained being negative, very significant in variants V2, V3and V4. The increase in the copper content in the substrate, in variants V3and V4, has determined the decrease in the chlorophyll a content