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  • Title: Identification of microRNAs in rice root in response to nitrate and ammonium.
    Author: Li H, Hu B, Wang W, Zhang Z, Liang Y, Gao X, Li P, Liu Y, Zhang L, Chu C.
    Journal: J Genet Genomics; 2016 Nov 20; 43(11):651-661. PubMed ID: 27372185.
    Abstract:
    Nitrate and ammonium are two major nitrogen (N) sources for higher plants, but they differ in utilization and signaling. MicroRNAs (miRNAs) play an essential role in N signal transduction; however, knowledge remains limited about the regulatory role of miRNAs responsive to different N sources, especially in crop plants. To get global overview on miRNAs involved in N response in rice, we performed high-throughput small RNA-sequencing under different nitrate and ammonium treatments. The results demonstrated that only 16 and 11 miRNAs were significantly induced by nitrate and ammonium under short-term treatment, respectively. However, 60 differentially expressed miRNAs were found between nitrate and ammonium under long-term cultivation. These results suggested that miRNA response greatly differentiates between nitrate and ammonium treatments. Furthermore, 44 miRNAs were found to be differentially expressed between high- and low-N conditions. Our study reveals comprehensive expression profiling of miRNAs responsive to different N sources and different N treatments, which advances our understanding on the regulation of different N signaling and homeostasis mediated by miRNAs.
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