Effect of Chromium Ions on the Growth of Fusarium oxysporum f.sp. lycopersici and Cunninghamella echinulata PDF

Keywords

chromium, tomato growth, fungi

Abstract

This investigation evaluates the role of chromium in the growth of a tomato phytopathogenic fungus (Fusarium oxysporum f.sp. lycopersici) and a tomato rhizospheric fungus (Cunninghamella echinulata). Hexavalent chromium was much more toxic in the linear growth of the two experimental fungi than the trivalent ion, Cunninghamella echinulata being more tolerant to the large doses than Fusarium oxysporum f.sp. lycopersici. In the meantime, chromate and chromic has less effect on dry weight gain in Fusarium oxysporum than dichromate. Under all conditions, the inhibition of dry weight gain increased with the rise of concentration of any chromium ions but was partially overcome with age.