The ability of enrichment and tolerance of sunflower seedlings to Cu

Pb were studied using the indoor culture technique.The results indicated that sunflower seedlings had high ability of enrichment to Cu

Pb

and their roots were main organs of enrichment

moreover the transportation ability of Cu from roots to stems and leaves was better than Pb's.Cu and Pb with low concentration stimulated the nutritive growth of seedlings;but under high concentration

except groups of Pb

other treatments inhibited the nutritive growth of sunflower seedlings.Cu

Pb inhibited activities of seedlings' root systems

stimulated the generation of proline in seedlings' stems and leaves

changed the distribution level of protein contents in the haulm and roots.The interaction of Cu and Pb had synergistic influence on nutritive growth of seedlings and physiological-biochemical reactions.Sunflower belong to the kind of plants that can enrich heavy metals

and it has strong tolerance