Cu and nutrient deficiency on different effects of growth, tolerance and mineral elements accumulation between two Elsholtzia haichouensis populations Copper uptake mechanism of Elsholtzia splendens and Commelina communis Differences of Cu uptake and acid phosphatase activities of two Elsholtzia haichowensis Sun populations Analysis on characteristics of phytogeochemistry of Elsholtzia haichowensis in Daye Tonglushan copper mine Isolation and Activity Analysis of Cell Wall Invertase Gene Promoter (EhcwINVP) from Elsholtzia haichowensis Sun