חיפוש מתקדם
Journal of Plant Nutrition
Ganmore-Neumann, R., Department of Soil Chemistry and Plant Nutrition, Organization, The Volcani Center, P.O.B. 6, Bet Dagan 50250, Israel
Bar-Yosef, B., Department of Soil Chemistry and Plant Nutrition, Organization, The Volcani Center, P.O.B. 6, Bet Dagan 50250, Israel
Shanzer, A., Departyrnent of Organic Chemistry, Weizrnann Institute of Science, Rehovot 76100, Israel
Libman, J., Departyrnent of Organic Chemistry, Weizrnann Institute of Science, Rehovot 76100, Israel
The objective of this study was to investigate whether a specific siderophore-mediated iron uptake (possibly preceded by a reduction step) occurs in corn roots at a specific recognition site. The activity of ferrichrome analogs and ferrioxamine B, as iron carriers into corn roots, was studied. Stereo-specific recognition of. Fe-ferrichrome analogs was observed during Fe uptake by corn roots. All ferrichrome analogs forming Fe(III) complexes of the same absolute configuration as does natural ferrichrome (jv-cis), enhance Fe uptake, while their enantiomers lack biological activity. Gallium (III) failed to be taken up under analogous conditions, indicating that synthetic ferrichrome analogs mediate the Fe uptake via a specific reduction step. Within certain limits, binding energy of the chelator did not play a role in enhancing iron uptake. It is suggested that the iron uptake mechanism in corn roots involves binding to a specific chiral receptor in conjunction with a reductive process. © 1992, Taylor & Francis Group, LLC. All rights reserved.
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הספר "אוצר וולקני"
אודות
תנאי שימוש
Enhanced iron (fe) uptake by synthetic sidero-phores in corn roots
15
Ganmore-Neumann, R., Department of Soil Chemistry and Plant Nutrition, Organization, The Volcani Center, P.O.B. 6, Bet Dagan 50250, Israel
Bar-Yosef, B., Department of Soil Chemistry and Plant Nutrition, Organization, The Volcani Center, P.O.B. 6, Bet Dagan 50250, Israel
Shanzer, A., Departyrnent of Organic Chemistry, Weizrnann Institute of Science, Rehovot 76100, Israel
Libman, J., Departyrnent of Organic Chemistry, Weizrnann Institute of Science, Rehovot 76100, Israel
Enhanced iron (fe) uptake by synthetic sidero-phores in corn roots
The objective of this study was to investigate whether a specific siderophore-mediated iron uptake (possibly preceded by a reduction step) occurs in corn roots at a specific recognition site. The activity of ferrichrome analogs and ferrioxamine B, as iron carriers into corn roots, was studied. Stereo-specific recognition of. Fe-ferrichrome analogs was observed during Fe uptake by corn roots. All ferrichrome analogs forming Fe(III) complexes of the same absolute configuration as does natural ferrichrome (jv-cis), enhance Fe uptake, while their enantiomers lack biological activity. Gallium (III) failed to be taken up under analogous conditions, indicating that synthetic ferrichrome analogs mediate the Fe uptake via a specific reduction step. Within certain limits, binding energy of the chelator did not play a role in enhancing iron uptake. It is suggested that the iron uptake mechanism in corn roots involves binding to a specific chiral receptor in conjunction with a reductive process. © 1992, Taylor & Francis Group, LLC. All rights reserved.
Scientific Publication
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