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A high-affinity iron transport system of Rhizobium meliloti may be required for efficient nitrogen fixation in planta (1991)

Gill, P. R. ; Barton, L. L. ; Scoble, M. D. ; [et al.]

Springer

Plant and soil 130 (1991), S. 211-217

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ISSN: 1573-5036

Keywords: iron transport ; nitrogen fixation ; nodulation ; Rhizobium ; symbiosis

Source: Springer Online Journal Archives 1860-2000

Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition

Notes: Abstract We have analyzed the ability of single site insertion mutants of Rhizobium meliloti 1021 defective in various components of a high-affinity iron transport system to produce nodules, fix nitogen and promote plant growth. Our results indicate that a high-affinity iron transport system may significantly increase the ability of the differentiated form of the bacterium to fix nitrogen and induce an increase in plant growth.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00011875

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The requirement of chrysobactin dependent iron transport for virulence incited by Erwinia chrysanthemi on Saintpaulia ionantha (1991)

Enard, C. ; Franza, T. ; Neema, C. ; [et al.]

Springer

Plant and soil 130 (1991), S. 263-271

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ISSN: 1573-5036

Keywords: bacteria ; Erwinia chrysanthemi ; iron transport ; phytopathogenicity ; Saintpaulia ionantha ; virulence

Source: Springer Online Journal Archives 1860-2000

Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition

Notes: Abstract To incite a systemic disease on its specific host, Saintpaulia ionantha, the soft-rot Erwinia chrysanthemi strain 3937 requires a functional high affinity iron transport system. Under iron starvation, strain 3937 produces chrysobactin, a novel catechol-type siderophore. Recent advances in the biochemistry and genetics of iron assimilation in E. chrysanthemi are reported. Analysis of leaf intercellular fluid from healthy and infected plants suggests: (i) leaf vessels in which the bacteria develop during infection would be low in free iron and (ii) chrysobactin could be produced in planta.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00011882

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