Secondary metabolites from fluorescent pseudomonads

Budzikiewicz, H.

doi:10.1111/j.1574-6968.1993.tb05868.x

Cited by 202 publications

(68 citation statements)

References 130 publications

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“…The pyoverdine of strain GB-1 (PVD GBÀ1 ; here called PVD for brevity) was purified from the filtered supernate of a 4 L culture in succinate medium (Albrecht-Gary et al, 1994) following standard procedures (Budzikiewicz, 1993). Solutions and media were prepared with Sigma Ultra-Pure, Aldrich, or Fluka reagent-grade chemicals, Milli-Q deionized water, acid-washed glassware, and metal-free plastic products.…”

Section: Methodsmentioning

confidence: 99%

“…However, we here use the conservative notation PVD-Mn (III) until the structure of the PVD from strains GB-1 and MnB1 is fully described. The Mn (III) and Fe (III) adducts of PVD can be distinguished from each other and from PVD by differences in UV-vis light absorption spectra (Budzikiewicz, 1993;AlbrechtGary et al, 1994;Meyer, 2000;Palanché et al, 2004;Parker et al, 2004).…”

Section: Introductionmentioning

confidence: 98%

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Inter-relationships of MnO2 precipitation, siderophore–Mn(III) complex formation, siderophore degradation, and iron limitation in Mn(II)-oxidizing bacterial cultures

Parker

Morita

Mozafarzadeh

et al. 2007

Geochimica et Cosmochimica Acta

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

Inter-relationships of MnO2 precipitation, siderophore–Mn(III) complex formation, siderophore degradation, and iron limitation in Mn(II)-oxidizing bacterial cultures

Parker

Morita

Mozafarzadeh

et al. 2007

Geochimica et Cosmochimica Acta

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“…For example, soil may contain adequate amounts of iron for plant growth, but it is often in the form of insoluble Fe(III) precipitates. In this iron-starved situation, microorganisms have evolved to produce low molecular weight ironchelating or complexing agents called siderophores (Budzikkiewicz 1993;Rajkumar et al 2010). Siderophores have high affinity towards ferric ion (Winkelmann 1991).…”

Section: Introductionmentioning

confidence: 99%

A natural rice rhizospheric bacterium abates arsenic accumulation in rice (Oryza sativa L.)

Lakshmanan

Shantharaj

et al. 2015

Planta

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A natural rice rhizospheric isolate abates arsenic uptake in rice by increasing Fe plaque formation on rice roots. Rice (Oryza sativa L.) is the staple food for over half of the world's population, but its quality and yield are impacted by arsenic (As) in some regions of the world. Bacterial inoculants may be able to mitigate the negative impacts of arsenic assimilation in rice, and we identified a nonpathogenic, naturally occurring rice rhizospheric bacterium that decreases As accumulation in rice shoots in laboratory experiments. We isolated several proteobacterial strains from a rice rhizosphere that promote rice growth and enhance the oxidizing environment surrounding rice root. One Pantoea sp. strain (EA106) also demonstrated increased iron (Fe)-siderophore in culture. We evaluated EA106's ability to impact rice growth in the presence of arsenic, by inoculation of plants with EA106 (or control), subsequently grew the plants in As-supplemented medium, and quantified the resulting plant biomass, Fe and As concentrations, localization of Fe and As, and Fe plaque formation in EA106-treated and control plants. These results show that both arsenic and iron concentrations in rice can be altered by inoculation with the soil microbe EA106. The enhanced accumulation of Fe in the roots and in root plaques suggests that EA106 inoculation improves Fe uptake by the root and promotes the formation of a more oxidative environment in the rhizosphere, thereby allowing more expansive plaque formation. Therefore, this microbe may have the potential to increase food quality through a reduction in accumulation of toxic As species within the aerial portions of the plant.

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“…Recovery of Siderophore CAS positive cell free supernatant was concentrated (109) on rotary vacuum evaporator (Buchi, R-124, Switzerland) at 40°C at 100 rpm, pH of the concentrated supernatant was set to 6.0 with 12 N HCl and it was loaded on XAD [10,24]. CAS positive fractions obtained from the columns were evaporated to dryness.…”

Section: Siderophore Production Detection and Estimationmentioning

confidence: 99%

“…Great variation occurs in physicochemical properties of siderophores, one organism may produce a variety of siderophores therefore for the extraction of different siderophores different recovery methods and identification approaches have been used [10,11]. Iso-electric-focussing (IEF) is emerging as a promising tool for the identification of siderophore based on the diversity in the structure of peptide molecules of siderophores [9,12,13].…”

Section: Introductionmentioning

confidence: 99%

Chemical Characterization, Crossfeeding and Uptake Studies on Hydroxamate Siderophore of Alcaligenes faecalis

Sayyed¹,

Chincholkar

Meyer

et al. 2011

Indian J Microbiol

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We report the production of two types of siderophores namely catecholate and hydroxamate in modified succinic acid medium (SM) from Alcaligenes faecalis. Two fractions of siderophores were purified on amberlite XAD, major fraction was hydroxamate type having a λ(max) at 224 nm and minor fraction appeared as catecholate with a λ(max) of 264 nm. The recovery yield obtained from major and minor fractions was 297 and 50 mg ml(-1) respectively. The IEF pattern of XAD-4 purified siderophore suggested the pI value of 6.5. Cross feeding studies revealed that A. faecalis accepts heterologous as well as self (hydroxamate) siderophore in both free and iron complexed forms however; the rate of siderophore uptake was more in case of siderophores complexed to iron. Siderophore iron uptake studies indicated the differences between hydroxamate siderophore of A. faecalis and Alc E, a siderophore of Alcaligenes eutrophus.

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Secondary metabolites from fluorescent pseudomonads

Cited by 202 publications

References 130 publications

Inter-relationships of MnO2 precipitation, siderophore–Mn(III) complex formation, siderophore degradation, and iron limitation in Mn(II)-oxidizing bacterial cultures

Inter-relationships of MnO2 precipitation, siderophore–Mn(III) complex formation, siderophore degradation, and iron limitation in Mn(II)-oxidizing bacterial cultures

A natural rice rhizospheric bacterium abates arsenic accumulation in rice (Oryza sativa L.)

Chemical Characterization, Crossfeeding and Uptake Studies on Hydroxamate Siderophore of Alcaligenes faecalis

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