Exogenous Additives Decrease in vivo Cadmium Content and Have Effect on Metabolism Enzymes of Lentinus edodes Under Cd Stress Physiological Responses of Zea mays Seedlings to Interactions Between Cadmium and Salinity Investigation of Genotypic Difference of Cadmium Contents in Shoots of Brassica campestris ssp. chinensis Regulation of exogenous brassinosteroid on growth and photosynthesis of Helianthus tuberosus seedlings and cadmium biological enrichment under cadmium stress