Maize orthologs of rice GS5 and their trans-regulator are associated with kernel development Dynamic Changes of Main Mineral Elements Content in Developing Fruits and Leaves of Castanea henryi Effect of Nitrogen Supply on Early Kernel Development and Yield in Summer Maize (Zea mays L.) Studies on the Relationship between Polyamines and Kernel Abortion in Maize Studies on Ethylene Metabolism during the Early Period of Maize Kernel Development Effects of Low-light Stress on Kernel Setting, and Carbon and Nitrogen Metabolism of Different Maize (Zea mays L.) Genotypes