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  • Title: Untangling the molecular mechanisms and functions of nitrate to improve nitrogen use efficiency.
    Author: Iqbal A, Qiang D, Alamzeb M, Xiangru W, Huiping G, Hengheng Z, Nianchang P, Xiling Z, Meizhen S.
    Journal: J Sci Food Agric; 2020 Feb; 100(3):904-914. PubMed ID: 31612486.
    Abstract:
    A huge amount of nitrogenous fertilizer is used to increase crop production. This leads to an increase in the cost of production, and to human and environmental problems. It is therefore necessary to improve nitrogen use efficiency (NUE) and to design agronomic, biotechnological and breeding strategies for better fertilizer use. Nitrogen use efficiency relies primarily on how plants extract, uptake, transport, assimilate, and remobilize nitrogen. Many plants use nitrate as a preferred nitrogen source. It acts as a signaling molecule in the various important physiological processes required for growth and development. As nitrate is the main source of nitrogen in the soil, root nitrate transporters are important subjects for study. The latest reports have also discussed how nitrate transporter and assimilation genes can be used as molecular tools to improve NUE in crops. The purpose of this review is to describe the mechanisms and functions of nitrate as a specific factor that can be addressed to increase NUE. Improving factors such as nitrate uptake, transport, assimilation, and remobilization through activation by signaling, sensing, and regulatory processes will improve plant growth and NUE. © 2019 Society of Chemical Industry.
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