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Nitrogen use efficiency (NUE) was very low in China and a loss of as much as 70% of the applied nitrogen fertilizers was reported in high-yielding rice fields. In order to investigate the molecular basis of high-affinity ammonium transport or uptake into rice (Oryza sativa L.), we analyzed the expression profiles of nine ammonium transporters (AMT), three each of OsAMT1, OsAMT2 and OsAMT3, at two...
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