This article looked at how plants can turn off or switch on their nitrogen transporter gene depending on the availability of nitrogen in the soil. In plants there are chains of polypeptides located in the roots which can send a CEP signal to a receptor located in the shoot of the plant, based on the amount of available nitrogen. The CEP receptor located in the shoot receives this signal from the roots, and can then switch on certain genes to better conserve energy and uptake nitrogen. For example roots thats were exposed to a higher concentration of nitrogen showed an increase in expression of this transporter gene to better use the available nitrogen. This kind of research has significant applications in the field of agriculture as far as fertilizers are made, and how to get plants to best utilize the nutrients present in those fertilizers.
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