in response to Fe deficiency suggest that Fe deficiency causes changes in the relative abundance of several Fe-containing protein species, especially those in photosystem I (PS I) that ultimately affect photosynthetic efficiency. However, all reports were analyzed based on solution culture conditions. The effects of the intercropping system and its ecological significance are complex n calcareous soils and are therefore difficult to study. Proteomic profiling represents a promising tool for ecological studies and will be helpful to illustrate the ecological significance of the maize-peanut intercropping system [23].