OAR@ICRISATReaction of ferric iron by siderophore produced by a bradyrhizobium strainP T CNambiarauthorSSivaramakrishnanauthorB SRaoauthorFerric iron (Fe+3) chelating compounds, including siderophores produced by microorganisms, help in the Fe nutrition of plants. Dicotyledonous plants absorb Fe in the ferrous (Fe+2) form. The ability of siderophores produced by a Brady ‐rhizobium strain, a rhizosphere bacterium of groundnut (Arachis hypogaea), to reduce Fe+3 was tested. Two Fe+3 (58Fe) binding fractions were separated from the culture supernatant of a Bradyrhizobium strain grown in an iron deficient medium. One of the fractions isolated reduced Fe+3 to Fe+2, unlike the synthetic chelator ethylenediaminetetraacetic acid (EDTA). It has been proposed that Fe‐chelators supply Fe+3 to groundnut roots, and Fe+3 reduction to Fe+2 and its uptake occurs at the plasmalemma. Since siderophores can reduce Fe+++, they may help in Fe nutrition of groundnut plants better than chelators like EDTA. There is no evidence to indicated siderophore uptake by groundnut plants, but we have detected ethyl acetate insoluble Fe+3 reducing activity in the xylem sap of the plantsAgriculture-Farming, Production, Technology, Economics1990Taylor & FrancisArticle

For work being deposited by its own author: In self-archiving this collection of files and associated bibliographic metadata, I grant OAR@ICRISAT the right to store them and to make them permanently available publicly for free on-line. I declare that this material is my own intellectual property and I understand that OAR@ICRISAT does not assume any responsibility if there is any breach of copyright in distributing these files or metadata. (All authors are urged to prominently assert their copyright on the title page of their work.)

For work being deposited by someone other than its author: I hereby declare that the collection of files and associated bibliographic metadata that I am archiving at OAR@ICRISAT) is in the public domain. If this is not the case, I accept full responsibility for any breach of copyright that distributing these files or metadata may entail.

Clicking on the deposit button indicates your agreement to these terms.