Résumé:
Copper is one of the most toxic heavy metals, it causes considerable damage in plants. This
work is to follow the behavior of the bean (Vicia faba L.) copper with stress of copper. This plant is
used as a model in ecotoxicological studies due to its large amount of biomass and its short growing
season.
The objective of our work is to study the influence of copper as sulfates CuSO4.5H2O at
doses of 0, 100 and 200 ppm, the morpho-physiological, anatomical and mechanisms behavior
involved in the process of seed germination of plants from both varieties sidi Aich and super
Aguadulce. The plant has been stressed at doses of copper of 0, 100 and 200 ppm. This stress was
applied twice during the growing cycle of the plant.
The results indicate that seed germination is perturbed and the mechanisms controlling this
process are changeable due to this stress. The presence of copper decreases the photosynthetic
activity and production of biomass parameters accompanied by a reduction of the protein content in
the grains of the culture. These results also show an accumulation of soluble sugars and proline,
expressing a mechanism for regulating of the potentiel internal face of the action of metal stress.
The effect of copper stress and type of the plant variety is significant on the anatomic parameter of
the plant.
These results suggest that the presence of copper in high doses alters the normal functioning
and development of plants by disturbances on the morphological, physiological, biochemical and
anatomical behavior of the plant.
