Iron Uptake and Loading into Rice Grains

Detection of Chromosomal Regions Affecting Iron Concentration in Rice Shoots Subjected to Excess Ferrous Iron Using Chromosomal Segment Substitution Lines betweenJaponicaandIndica

“…For the iron uptake and transport in rice plants, several studies have been reported (Jeong and Guerinot 2009;Bashir et al, 2010;Kobayashi et al, 2010). Graminaceous plants are known to have Fe 3+ -mugineic acids (MA) complexes transporters in roots, which contribute to iron uptake from soils (Bashir et al, 2010;Kobayashi et al, 2010).…”

“…Graminaceous plants are known to have Fe 3+ -mugineic acids (MA) complexes transporters in roots, which contribute to iron uptake from soils (Bashir et al, 2010;Kobayashi et al, 2010). In addition to the Fe 3+ -MA transporters, rice was reported to have the ferrous iron (Fe 2+ ) transporters, OsIRT1 and OsIRT2, and their expression was induced in roots under iron deficient conditions (Ishimaru et al, 2006).…”

“…In addition to the Fe 3+ -MA transporters, rice was reported to have the ferrous iron (Fe 2+ ) transporters, OsIRT1 and OsIRT2, and their expression was induced in roots under iron deficient conditions (Ishimaru et al, 2006). In xylem tissue, iron is thought to be translocated as Fe 3+ -citrate complex (Bashir et al, 2010;Kobayashi et al, 2010), and the citrate transporter, OsFRDL1, that localized on pericycle cells of the roots was suggested to contribute to the iron translocation to shoot (Yokosho et al, 2009). Iron-chelate transporter genes; OsYSL2, OsYSL15 and OsYSL18, the ferrous iron transporter gene; OsIRT1, and the genes related to the biosynthesis of chelates, OsNAS1-3, OsNAAT1 and OsDMAS1, were expressed in the phloem companion cells, suggesting that they contribute to the iron translocation through phloem (Bashir et al, 2010;Kobayashi et al, 2010).…”

“…In xylem tissue, iron is thought to be translocated as Fe 3+ -citrate complex (Bashir et al, 2010;Kobayashi et al, 2010), and the citrate transporter, OsFRDL1, that localized on pericycle cells of the roots was suggested to contribute to the iron translocation to shoot (Yokosho et al, 2009). Iron-chelate transporter genes; OsYSL2, OsYSL15 and OsYSL18, the ferrous iron transporter gene; OsIRT1, and the genes related to the biosynthesis of chelates, OsNAS1-3, OsNAAT1 and OsDMAS1, were expressed in the phloem companion cells, suggesting that they contribute to the iron translocation through phloem (Bashir et al, 2010;Kobayashi et al, 2010). However, most of the iron homeostasis genes have been studied under the iron deficient conditions, and it is unclear whether the known genes, which are related to the iron uptake and transport, affect the tolerance under the excess ferrous iron conditions.…”

Role of exogenous nitric oxide in alleviating iron deficiency-induced peanut chlorosis on calcareous soil

“…Therefore, Fe deficiency severely impairs plant growth and is a widespread human dietary problem, with particularly high numbers of affected children and females (Bashir et al 2010). Because over one-third of the world's soils are considered Fe-deficient, it is very important for safe crop production (Zuo & Zhang 2011).…”