Concentrations of iron and phytosiderophores in xylem sap of iron-deficient barley plants

In vivo analysis of metal distribution and expression of metal transporters in rice seed during germination process by microarray and X-ray Fluorescence Imaging of Fe, Zn, Mn, and Cu

“…Mugineic acid family phytosiderophores (MAs) are natural Fe chelators that graminaceous plants secrete from their roots to solubilize Fe in the soil (Takagi 1976). As MAs have been identified in the xylem and phloem of rice and barley (Mori et al 1991;Kawai et al 2001), MAs may play an important role in the long-distance transport of Fe in graminaceous plants as well. Nicotianamine (NA), an intermediate in the MA biosynthetic pathway, is also thought to be involved in the long-distance transport of metal cations in the plant body (Stephan and Scholz 1993;Higuchi et al 1996;Pich and Scholz 1996;Stephan et al 1996;Ling et al 1999;Takahashi et al 2003).…”

Revisiting the Metal-Binding Chemistry of Nicotianamine and 2′-Deoxymugineic Acid. Implications for Iron Nutrition in Strategy II Plants

“…lism. In Strategy II species, substantial amounts of phytosiderophores have been found in both the xylem and phloem (Mori et al, 1991;Kawai et al, 2001 Wirén et al (1999) did show that Fe complexed by NA exhibited lower activity as a Fenton reagent than EDTA complexes or phosphate salts. However, no direct comparisons were made with Fe-binding polypeptides that are found in plants (e.g.…”

The Phytosiderophore Efflux Transporter TOM2 Is Involved in Metal Transport in Rice

“…These metals are micronutrients and are important for plant development because they are necessary for the activities and structures of various proteins. Because MAs have been identified in the xylem and phloem of rice and barley, they are also suggested to play an important role in the long-distance transport of metals in graminaceous plants (23)(24)(25)(26). NA has been suggested to play an essential role in metal translocation and accumulation in developing seeds on the basis of an analysis of the tomato chloronerva mutant (19) and NA-deficient transgenic tobacco (Nicotiana tabacum) plants (20).…”