Biomass Allocation and Heavy Metal Distribution in Different Varieties of Maize (Zea Mays L.) under Lead and Cadmium Applications
The effects of low non-lethal levels of heavy metals (Pb and Cd) on biomass allocation, relationship between vegetative biomass and reproductive biomass, and heavy metal distributions in plant were investigated for three varieties of maize (Zea mays L.). Results showed that significant two-way interactions between variety and heavy-metal application were the main source of variation of biomass allocation. Different levels of Pb and Cd applications did not cause relatively more biomass to be allocated reproductive biomass in three varieties, indicating that heavy-metal applications did not change the reproductive allometry. Although the concentrations of Pb and Cd in grains were lower than other organs, Pb and Cd concentrations of grains under higher heavy-metal treatments exceeded the national guidance limit for three varieties of maize, suggesting heavy metal pollution may pose risks to human health.
D. G. Fu et al., "Biomass Allocation and Heavy Metal Distribution in Different Varieties of Maize (Zea Mays L.) under Lead and Cadmium Applications", Advanced Materials Research, Vols. 343-344, pp. 1152-1159, 2012