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Efficacy of a bacterial siderophore, pyoverdine, to supply iron to Solanum lycopersicum plants

Paper ID Volume ID Publish Year Pages File Format Full-Text
20732 43188 2013 5 PDF Available
Title
Efficacy of a bacterial siderophore, pyoverdine, to supply iron to Solanum lycopersicum plants
Abstract

Active uptake of ferric iron in microorganisms is based on siderophores. During iron deficiency, Pseudomonas fluorescens synthesizes siderophores, called pyoverdine, which have a high affinity for ferric iron. Strategy I plants generally cannot synthesize pyoverdine or take up ferric iron. We assessed the effect of pyoverdine chelated to ferric iron on iron nutrition in Solanum lycopersicum. Weight and photosynthetic pigment concentrations in the plants supplemented with the pyoverdine and ferric iron were restored to the rates of plants supplemented with ferrous iron. Leaves and roots accumulated significant iron after pyoverdine and ferric iron supplementation than when supplemented with ferric iron alone. When leaves and roots were supplemented with pyoverdine and ferric iron, the SlFRO1 expression level was suppressed to 20% and 50% relative to those decreased with ferric iron alone, respectively. The level of SlIRT1 in roots supplemented with pyoverdine and ferric iron decreased to 50% compared with the level in roots supplemented with ferric iron alone. These results suggest that SlFRO1 and SlIRT1 expression levels were suppressed and that iron content was restored by pyoverdine and ferric iron supplementation. Thus, the downregulation may have occurred because of negative feedback on mRNA expression. Pyoverdine-mediated ferric iron uptake by tomato is suggested to be a useful strategy to increase iron uptake from the environment.

Keywords
Pseudomonas fluorescens; Siderophore; Pyoverdine; Solanum lycopersicum (tomato); Ferric iron (Fe(Ⅲ)); Ferric-chelate reductase 1 (FRO1); Iron-regulated transporter 1 (IRT1)
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Efficacy of a bacterial siderophore, pyoverdine, to supply iron to Solanum lycopersicum plants
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Bioscience and Bioengineering - Volume 115, Issue 6, June 2013, Pages 686–690
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us