Mutation of NRT1.1 enhances ammonium/low pH-tolerance in Arabiopsis thaliana
1Department of Biological Sciences, Graduate School of Science, The University of Tokyo, Bunkyo-ku, Tokyo, Japan. takushi@biol.s.u-tokyo.ac.jp
Abstract:
NRT1.1 is a dual-affinity nitrate transporter and a nitrate sensor that plays a role in nitrate-dependent signaling pathway. Recently, it has been revealed that NRT1.1 mutants show enhanced tolerance to ammonium and/or low pH conditions in the absence of nitrate, which indicates a nitrate-independent function of NRT1.1. Detailed underlying mechanisms for the ammonium/low pH-tolerance of the NRT1.1 mutants will be revealed by paying attention to auxin behavior, phosphorylated status of NRT1.1 and other components related to the primary nitrate response and nitrate transport.
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