Cooper accumulation in roots, steams and leaves of a food plant

BENIMELI C.S.; MEDINA ANA L; NAVARRO CAROLINA; MEDINA R.B.; AMOROSO M.J.; GOMEZ M.I.

Tucumán

Jornada; XXII Jornadas Científicas de Biología de Tucumán; 2006

Sociedad de Biología de Tucumán

Plants metal biosorption are affected by species, gorwth and chemical elements characteristics. In Tucumán there is a copper filter plant that produces metal contamination in agriculture surrounding areas. The aim of this work was to determine Cu accumulation in maize plant and its capacity of gorwth. Maize seeds were germinated in sterile, humid and dark conditions at 30 ºC for 3 days, being later seeded in an inert material. The plants were watered 10 days with nutritive broth, 6 more with also CuSO4 250 mg/L and kept at 30 ºC with light cycles of 12 h. The growth was evaluated in roots, stems and leaves. Cu accumulation was measured by atomic absorption spectrophotometer. A growth diminution of 10% in roots and leaves was observed compared to the controls, however in roots and leaves were 83 and 86%. The capacity of Cu(II) accumulation by a food plant, could be prejudicial for the trophic chain because their toxicity in high concentrations.