2M. Treeby,H. Marschner,V. R?mheld. Mobilization of iron and other micronutrient cations from a calcareous soil by plant-borne, microbial, and synthetic metal chelators[J] 1989,Plant and Soil(2):217～226
3J. L. Morel,M. Mench,A. Guckert. Measurement of Pb2+, Cu2+ and Cd2+ binding with mucilage exudates from maize (Zea mays L.) roots[J] 1986,Biology and Fertility of Soils(1):29～34
