Desorption and Plant Availability of Myo-Inositol Hexaphosphate Adsorbed on Goethite

Martín, María; Celi, Luisella; Barberis, Elisabetta

doi:10.1097/01.ss.0000117787.98510.9d

Cited by 61 publications

(58 citation statements)

References 38 publications

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“…Desorption of IP 6 in different solutions depends generally on the number of phosphate moieties of the IP 6 involved in the stabilization and charge of the surface of the IP 6 -adsorbent complex, since negatively charged surfaces can hamper ligand exchange (Celi and Barberis, 2007;Celi et al, 2003;Martin et al, 2004). For instance, there is limited desorption of IP 6 from goethite, in which four phosphate groups are involved, whereas desorption from ferrihydrite-kaolinite, which involves only one phosphate group, is relatively easy (Celi and Barberis, 2007).…”

Section: Discussionmentioning

confidence: 99%

Identification of inositol hexakisphosphate binding sites in soils by selective extraction and solution 31P NMR spectroscopy

Jørgensen

Turner²,

Reitzel

2015

Geoderma

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Section: Discussionmentioning

confidence: 99%

Identification of inositol hexakisphosphate binding sites in soils by selective extraction and solution 31P NMR spectroscopy

Jørgensen

Turner²,

Reitzel

2015

Geoderma

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“…The number of phosphates involved depends on the steric hindrance of the organic moiety and on mineral properties, such as the degree of crystallinity, the proportion of reactive sites for adsorption on the total area, and the distances between contiguous hydroxyls (Celi and Barberis, 2005). The mechanism of adsorption may affect the bonding strength and thus inositol phosphate desorption: in general, inositol phosphate release is limited and, because of the number of P groups involved in the adsorption mechanism, lower than that reported for inorganic P (Celi et al, 2003;Martin et al, 2004).…”

mentioning

confidence: 85%

Interaction of Organic Phosphorus With Clays Extracted From Oxisols

Giaveno¹,

Celi²,

Cessa

et al. 2008

Soil Science

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In highly weathered soils, such as tropical soils, organic phosphorus (P) may decline together with total P and could be represented by a relatively lower amount of inositol phosphates compared with temperate soils. The aim of this work was to understand the abiotic processes leading to inositol phosphate retention in highly weathered soils. Sorption of myo-inositol hexakisphosphate and inorganic phosphate (Pi) on two clay fractions (A and B) extracted from Brazilian oxisols was studied, examining both the extent of P retention and surface property modifications induced by anion sorption. The two clays were characterized by a high amount of crystalline iron oxides and kaolinite. In clay A, gibbsite was also present, plus a higher amount of organic matter. The two clays presented a similar specific surface area, but clay A had a lower microporosity. The amount of Pi sorbed on the two clays was similar, reaching a plateau at about 1.35 2mol m j2 , whereas the amount of myo-inositol hexakisphosphate was higher on clay A, 0.67 2mol m j2 , than clay B, 0.49 2mol m j2 . The retention of both P forms on the two clays was linked to the large presence of crystalline Fe and Al oxides. Whereas Pi adsorbed on the external surfaces and diffused into micropores, myo-inositol hexakisphosphate likely adsorbed only on the external surfaces. The precipitation of Al and Fe myo-inositol hexakisphosphate was also limited because of the small amounts of soluble Al and Fe forms. All these phenomena may contribute to justify the relatively low accumulation of these organic P compounds found in some highly weathered soils. (Soil Science 2008;173:694-706)

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“…Phytatehydrolysing bacteria in Lolium perenne rhizosphere are thought to make up~40 % of the total heterotrophic bacteria (Jorquera et al 2008a). L. perenne is a key forage grass worldwide representing 70 % of agricultural land in United Kingdom (Sharma and Sahi 2005;King et al 2008), but it shows limited growth with phytate as sole P source (Martin et al 2004), and is therefore a useful model to assess the phytatehydrolysing bacterial community in the rhizosphere.…”

Section: Introductionmentioning

confidence: 99%

Assessment of functional diversity and structure of phytate-hydrolysing bacterial community in Lolium perenne rhizosphere

2015

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Background and aims Plant growth is frequently limited by the availability of inorganic phosphorus (P) in the soil. In most soils, a considerable amount of the soil P is bound to organic molecules. Of these, phytate is the most abundant identifiable organic P form, but is not readily available to plants. In contrast, microorganisms have been shown to degrade phytate with high efficiency. The current study aims to characterize the members of the phytate-hydrolysing bacterial community in rhizosphere, and the molecular and enzymatic ability of these bacteria to degrade phytate. Methods and resultsThe phytate-hydrolysing bacterial community was characterized from the rhizosphere of plants cultivated in the presence or absence of phytate supplementation. Major changes in the bacterial community structure were observed with both culturedependent and -independent methods, which highlighted the predominance of Proteobacteria and Actinobacteria. Phytase activity was detected for a range of rhizobacterial isolates as well as the presence of, β-propeller phytases (BPP) for both isolates and directly in a soil sample. Conclusion A wide taxonomic range of functional phytate utilizers have been discovered, in soil bacterial taxa that were previously not well known for their ability to utilise phytate as P or C sources. This study provides new insights into microbial carbon and phosphorus cycling in soil.

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Desorption and Plant Availability of Myo-Inositol Hexaphosphate Adsorbed on Goethite

Cited by 61 publications

References 38 publications

Identification of inositol hexakisphosphate binding sites in soils by selective extraction and solution 31P NMR spectroscopy

Identification of inositol hexakisphosphate binding sites in soils by selective extraction and solution 31P NMR spectroscopy

Interaction of Organic Phosphorus With Clays Extracted From Oxisols

Assessment of functional diversity and structure of phytate-hydrolysing bacterial community in Lolium perenne rhizosphere

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