A protein having an amino acid sequence represented by SEQ ID NO: 1 or 2 or an
amino acid sequence having said amino acid sequence with a single or plural amino
acids deleted, replaced or added, and having the nicotianamine aminotransferase
activity, a gene encoding said protein as well as utilization thereof for enhancement
of ability of absorbing insoluble iron in soil and for improvement of resistance
to iron deficiency are provided.
