Manganese Enrichment in Organs of Phytolacca americana at Reproductive Period and Its Effects on Seed Germination Manganese stress on the ultrastructures of a manganese tolerant plant,Polygonum perfoliatum L. Influence of manganese on growth, nutrient uptake, and organic acid efflux by ectomycorrhizal fungi and manganese distribution in hyphae Early physiological response to manganese ion with different concentrations and manganese tolerance of Camellia oleifera seedlings Effect of Manganese Stress on Nitrogen Accumulation of Soybean Manganese stress on morphological structures of leaf and ultrastructures of chloroplast of a manganese hyperaccumulator, Phytolacca americana Effects of manganese stress on photosythesis and chlorophyll fluorescence parameters of Phytolacca americana