Moving up, down, and everywhere: signaling of micronutrients in plants

Analysis of the Root System Architecture of Arabidopsis Provides a Quantitative Readout of Crosstalk between Nutritional Signals

“…The importance of plant mineral nutrition for human food production is reflected in a long history of research in this area. To date, we have a detailed understanding of the transport, signaling, and metabolic pathways that allow plants to adapt to fluctuating nutrient availability in the soil (Amtmann and Blatt, 2009;Armengaud et al, 2009a;Giehl et al, 2009;Gojon et al, 2009). However, until now, effects of individual nutrients have mostly been studied in isolation.…”

Moving micronutrients from the soil to the seeds: Genes and physiological processes from a biofortification perspective

“…Several recent reviews [30][31][32] have provided excellent coverage of the literature on Fe uptake processes and regulation of Fe uptake genes, such as FIT/FER transcription factors, FRO ferric-chelate reductase gens, and IRT ferrous-iron uptake transporters in dicots, and IREG and IRO transcription factors, phytosiderophore synthesis genes, and YS/YSL uptake genes in grasses (table 2). Primary uptake of Zn is less well defined, but in Arabidopsis is likely carried out by Zn transporters of the ZIP family, some of which are Zn regulated in roots and other tissues [58].…”

Feruloyl-CoA 6'-Hydroxylase1-Dependent Coumarins Mediate Iron Acquisition from Alkaline Substrates in Arabidopsis

“…At the transcriptional level, the individual components of the strategy I are regulated by the cooperative action of the basic helix-loop-helix (bHLH) transcription factors FER-LIKE IRON DEFICIENCY-INDUCED TRANSCRIPTION FACTOR (FIT) and bHLH38 and bHLH39 (Colangelo and Guerinot, 2004;Jakoby et al, 2004;Yuan et al, 2008). This highly coordinated transcriptional regulation of the Fe acquisition machinery allows plants enhancing Fe intake when Fe is limited or when the plant's demand for Fe has increased (Giehl et al, 2009).…”