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Iron (Fe) is abundant in soils but generally poorly soluble. Plants, with the exception of Graminaceae, take up Fe using an Fe(III)‐chelate reductase coupled to an Fe(II) transporter. Whether or not nongraminaceous species can convert scarcely soluble Fe(III) forms into soluble Fe forms has deserved little attention so far. We have used Beta vulgaris, one among the many species whose roots secrete...
Studies of Iron (Fe) uptake mechanisms by plant roots have focussed on Fe(III)‐siderophores or Fe(II) transport systems. Iron deficency also enhances root secretion of flavins and phenolics. However, the nature of these compounds, their transport outside the roots and their role in Fe nutrition are largely unknown.We used HPLC/ESI‐MS (TOF) and HPLC/ESI‐MS/MS (ion trap) to characterize fluorescent...
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