Research progress on nitrogen uptake by plant roots

Soil nitrogen is one of the mineral elements which can be absorbed by plant roots and is important for plant development. Therefore，the study of plant root N uptake becomes an important issue in predicting the structure and function of ecosystem. There are two types of N in the soil: inorganic N and organic N; the inorganic N which could be utilized was nitrate and ammonium, while the organic N mainly refers to amino acid. Present research summarized the mechanism of N absorbing and regulating by plant root, and future prospects on this research were put forward.