Iron acquisition by plants.
In nongraminaceous plants, the FeII-transporter gene and ferric-chelate reductase gene have been cloned from Arabidopsis thaliana, whereas FeIII-reductase has not. In graminaceous monocots, the genes for mugineic acids (MAs) synthesis, nas (nicotianamine synthase) and naat (nicotianamine aminotransferase), have been cloned from barley, whereas the FeIII-MAs transporter gene is yet to be cloned. Transferrin absorption in Dunaliella has been reported, suggesting a phagocytotic (endocytotic) Fe-acquisition mechanism. Work to develop transgenic cultivars tolerant to Fe-deficiency in calcareous soils is now in progress.
Mori
S
S
Laboratory of Plant Molecular Physiology, Department of Applied Biological Chemistry, The University of Tokyo, Tokyo, 113-8657, Japan.
D002352:Carrier Proteins / Q000378:metabolism; D004705:Endocytosis; D007501:Iron / Q000378:metabolism*; D030821:Plants, Genetically Modified
D002352:Carrier Proteins; D007501:Iron