Effect of aflatoxin G1 on germination, growth and metabolic activities of some crop plants.

The effect of different concentrations of aflatoxin G1 on growth and germination of Zea mays and Vicia faba seeds, as well as on some biochemical parameters viz chlorophyll, carotenoid, protein and lipid content of seedlings, were studied. Inhibition of seed germination and seedling growth of maize and broad bean increased with increases in toxin concentration. A reduction in carbohydrates in the shoot systems of maize and broad bean was accompanied by a corresponding reduction in chlorophyll content. The total proteins and total lipids of V. faba were significantly greater at a 10 micrograms/ml concentration of aflatoxin G1, whereas in Z. mays significant inhibition (p < 0.05) was observed. At 5.0 micrograms/ml aflatoxin G1 lipids and proteins were reduced in both plants but the effect was less obvious at lower concentrations.