Full TGIF Record # 71908
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Web URL(s):http://www.tandfonline.com/doi/pdf/10.1080/01904160009382125
    Last checked: 10/13/2015
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Publication Type:
i
Report
Author(s):Gerke, Jörg
Title:Mathematical modelling of iron uptake by graminaceous species as affected by iron forms in soil and phytosiderophore efflux
Section:Chemistry of iron in soils
Other records with the "Chemistry of iron in soils" Section
Source:Journal of Plant Nutrition. Vol. 23, No. 11/12, November/December 2000, p. 1579-1587.
# of Pages:9
Publishing Information:New York: Marcel Dekker, Inc.
Keywords:TIC Keywords: Models; Iron; Nutrient uptake; Uptake; Amino acids; Nutrient deficiency; Nutrient availability; Mathematical equations; Humic substances; Metabolism; Poaceae; Roots
Abstract/Contents:"Graminaceous species excrete nonproteoinogenic amino acids (phytosiderophores) as an adaptive mechanism to iron (Fe) deficiency. According to Marschner and Römheld, these organic molecules can mobilize Fe in soil and are taken up as Fe(III)- phytosiderophore complexes with a high rate. The quantitative effect of the efflux of mugineic acid (MA) as a representative of the phytosiderophores on the influx of chemically mobilized Fe into the roots was calculated depending on different Fe forms in soil, such as goethite, ferrihydrite and humic-Fe complexes. The calculations show that MA mobilizes Fe from goethite at a low rate. As a consequence, the calculated influx of mobilized Fe from soil with goethite as the only Fe form was very low compared to the demand of the plants. If ferrihydrite was the principal Fe form in soil, the influx of chemically mobilized Fe was much higher and met the required demand of the plants if the MA efflux was medium to high, according to the data of Römheld and Marschner (1990). With humic-Fe complexes is easily mobilized by MA even if the efflux of the phytosiderophore is low. The calculations show the strong impor ance of Fe bound by humic substances for the Fe acquisition by strategy II plants."
Language:English
References:21
Note:Graphs
See Also:Other items relating to: Biostimulants
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Gerke, J. 2000. Mathematical modelling of iron uptake by graminaceous species as affected by iron forms in soil and phytosiderophore efflux. J. Plant Nutr. 23(11/12):p. 1579-1587.
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Web URL(s):
http://www.tandfonline.com/doi/pdf/10.1080/01904160009382125
    Last checked: 10/13/2015
    Requires: PDF Reader
    Access conditions: Item is within a limited-access website
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MSU catalog number: QK 867 .J67
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