Photosensitivity of Iron Chelates

Hill-Cottingham, D. G.

doi:10.1038/175347a0

Cited by 46 publications

(17 citation statements)

References 4 publications

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“…Light exposure of all chelate solutions was avoided during their preparation and storage because of the potential photodecomposition of chelates (Hill-Cottingham, 1955). o,p-EDDHA/Fe 3+ as substrate for FC-R in Fe-stressed cucumber plants Cucumber seeds (Cucumis sativus L. cv.…”

Section: Chelating Agents and Fe Chelatesmentioning

confidence: 99%

Effectiveness of Ethylenediamine-N(o-hydroxyphenylacetic)-N′(p-hydroxyphenylacetic) acid (o,p-EDDHA) to Supply Iron to Plants

et al. 2006

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The Fe chelate o,p-EDDHA/Fe 3+ , in addition to o,o-EDDHA/Fe 3+ , was found recently to be a component of commercial EDDHA/Fe 3+ chelates. The European Regulation on fertilisers has included o,p-EDDHA as an authorized chelating agent. The efficacy of o,o-EDDHA/Fe 3+ , o,p-EDDHA/Fe 3+ and EDTA/Fe 3+ chelates as Fe sources in plant nutrition was studied. Iron-chelate reductase (FC-R) in young cucumber plants (Cucumis sativus L.) roots reduced o,p-EDDHA/Fe 3+ faster than o,o-EDDHA/ Fe 3+ , EDTA/Fe 3+ and a commercial source of EDDHA/Fe 3+ . The o,p-EDDHA/Fe 3+ chelate was also more effective than the o,o-EDDHA/Fe 3+ in decreasing the severity of Fe-deficiency chlorosis in leaves of young soybean (Glycine max L.) plants grown hydroponically. The o,p-EDDHA ligand was more effective in the short-term than the EDTA and o,o-EDDHA ligands at dissolving Fe from selected Fe minerals and soils. However, the ultimate quantity of dissolve Fe was greatest with the o,o-EDDHA ligand.Abbreviations: BPDS -Bathophenanthroline disulfonic acid or 4,7-diphenyl-1,10-phenantroline disulfonic acid; EDDA -ethylene diamine diacetic acid; EDTA -Ethylene diamine tetraacetic acid; FC-R -Iron chelate reductase; HEPES -4-(2-Hydroxyethyl)piperazine-1

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Section: Chelating Agents and Fe Chelatesmentioning

confidence: 99%

Effectiveness of Ethylenediamine-N(o-hydroxyphenylacetic)-N′(p-hydroxyphenylacetic) acid (o,p-EDDHA) to Supply Iron to Plants

et al. 2006

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“…They conclude that the primary role of iron chelates in plant nutrition is in making iron available to the root and little evidence that the absorbed chelating agent is an effective activator of Fe within soya bean plants is available. Hill-Cottingham has shown that Fe-EDTA, Fe-HEEDTA and Fe-DTPA all undergo photoreduction and he suggests this provides a mechanism for the release of iron in green leaves (121).…”

Section: Iron Metabolismmentioning

confidence: 98%

Minor Mineral Nutrients

Nicholas¹

1961

Annu. Rev. Plant. Physiol.

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Several well documented surveys within the last five years have covered various aspects of the trace element nutrition of plants (1 to 10). The purpose of this review is not to catalogue the work done on trace metals during the last few years but rather to attempt to show how trace metals are concerned in some of the major metabolic pathways of plant metabolism. The term plant is used here in its wider and indeed correct sense to include bacteria, fungi, algae, and higher forms, It is noteworthy that the recent work on the role of trace metals in the metabolism of higher plants was often preceded by work with microorganisms.

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“…Before transferring the seedlings, pots were irrigated till field capacity. Then, pots were covered with foil to avoid the chelate photodegradation and algae development (Hill-Cottingham, 1955; Hernández-Apaolaza and Lucena, 2011). Once the seedlings were transferred (three plants per pot), the pots were watered daily with macronutrient solution (in mM): 0.8 Ca(NO 3 ) 2 , 0.9 KNO 3 , 0.2 MgNO 3 , 0.1 KH 2 PO 4 and micronutrient solution (in μM): 2.5 MnSO 4 , 1.0 CuSO 4 , 1.0 NiCl 2 , 1.0 CoSO 4 , 50.0 FeHBED.…”

Section: Methodsmentioning

confidence: 99%

EDTA Shuttle Effect vs. Lignosulfonate Direct Effect Providing Zn to Navy Bean Plants (Phaseolus vulgaris L ‘Negro Polo’) in a Calcareous Soil

2016

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Zn-Lignosulfonates (LS) fertilizers are used as an eco-friendly alternative to chelate formulations. The mechanisms of Zn release in the rhizosphere by both types of products are compared. The ability to provide Zn to Phaseolus vulgaris L of non-modified and chemically modified ZnLS and ZnEDTA is compared in a hydroponic assay. Stable isotope 67Zn was used to study Zn source (fertilizer, ZnFer, or native, ZnNat) uptake and distribution in plants in two soil pot experiments. ZnEDTA was the best treatment to provide both ZnFer and ZnNat to navy bean plants. A shuttle effect mechanism and an isotopic exchange may occur. ZnLS from eucalyptus (ZnLSE) provides more Zn to the plant than LS from spruce. Chemical modifications of ZnLSE does not improve its efficiency. A double dose of ZnLSE provides similar ZnFer in leaves and similar soluble ZnFer content in soil than ZnEDTA. A model for the Zn fertilizers behavior in the soil and plant system is presented, showing the shuttle effect for the synthetic chelate and the direct delivery in the rhizosphere for the ZnLS complex.

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Photosensitivity of Iron Chelates

Cited by 46 publications

References 4 publications

Effectiveness of Ethylenediamine-N(o-hydroxyphenylacetic)-N′(p-hydroxyphenylacetic) acid (o,p-EDDHA) to Supply Iron to Plants

Effectiveness of Ethylenediamine-N(o-hydroxyphenylacetic)-N′(p-hydroxyphenylacetic) acid (o,p-EDDHA) to Supply Iron to Plants

Minor Mineral Nutrients

EDTA Shuttle Effect vs. Lignosulfonate Direct Effect Providing Zn to Navy Bean Plants (Phaseolus vulgaris L ‘Negro Polo’) in a Calcareous Soil

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