Organophosphorus Complexones

Кабачник, М. И.; Medved, T. Ya.; Dyatlova, N. M.; Arkhipova, O. G.; Rudomino, M. V.

doi:10.1070/rc1968v037n07abeh001662

Cited by 57 publications

(7 citation statements)

References 11 publications

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“…Zobiole et al (2010a) reported that A, gs and E were reduced by glyphosate, possibly due to direct damage by glyphosate to chloroplasts (Campbell et al 1976;Pihakaski and Pihakaski 1980;Nilsson 1985) or immobilization of Mg and Mn required for chlorophyll formation and photosynthesis. Since glyphosate is a glyphosate a strong metal chelator (Jaworski 1972;Kabachnik et al 1974;Coutinho and Mazo 2005), it may immobilize essential micronutrients required as components, co-factors or regula- (Johal and Huber 2009). According to Cakmak (Cakmak et al 2009), the period for the observed 'yellow flashing' is most likely dependent on the ability of the plants to recover through adequate root uptake of the specific elements that are immobilized by glyphosate in plant tissues.…”

Section: Discussionmentioning

confidence: 99%

“…A previous study demonstrated that glyphosate reduced shoot concentrations of mineral nutrients in RR soybean as compared to nontreated RR soybean or their near-isogenic nontreated non-RR with the effect being most pronounced in the early maturity group cultivars (Zobiole et al 2010a). The effect on decreased shoot mineral concentration could be attributed to reductions in photosynthetic parameters as a result of direct damage of glyphosate to chlorophyll (Pihakaski and Pihakaski 1980;Kitchen et al 1981;Reddy et al 2004) or immobilization of essential micronutrients by glyphosate, due to the ability of glyphosate to form insoluble glyphosatemetal complexes (Jaworski 1972;Kabachnik et al 1974;Bromilow et al 1993;Coutinho and Mazo 2005).…”

Section: Introductionmentioning

confidence: 95%

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Glyphosate affects photosynthesis in first and second generation of glyphosate-resistant soybeans

et al. 2010

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The crop area planted to conventional soybeans has decreased annually while that planted to glyphosate-resistant (RR) soybean has drastically increased mainly due to the wide adoption of glyphosate in current weed management systems. With the extensive use of glyphosate, many farmers have noted visual plant injury in RR soybean varieties after glyphosate application. A new generation designated as "second generation-RR2" has been recently developed and these RR2 cultivars already are commercially available for farmers and promoted as higher yielding relative to the previous RR cultivars. However, little information is currently available about the performance of RR2 soybean beyond commercial and farmer testimonial data. Thus, an evaluation of different glyphosate rates applied in different growth stages of the first and second generation of RR soybeans, revealed a significant decrease in photosynthesis. In general, increased glyphosate rate and late applications (V6) pronounced decrease photosynthetic parameters and consequently decreased in leaf area and shoot biomass production. In contrast, low rate and early applications were less damage for the RR soybean plants, suggesting that with early applications (V2), plants probably have more time to recover from glyphosate or its metabolites effects regarding late applications.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 95%

Glyphosate affects photosynthesis in first and second generation of glyphosate-resistant soybeans

et al. 2010

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“…A series of the new lipophilic ␣-aminophosphonates containing various substituents, R 1 , R 2 , R 3 and R 4 , were synthesized by the Kabachnik-Fields reaction [6] in 62-95% yields.…”

Section: Resultsmentioning

confidence: 99%

Lipophilic aminophosphonates and their calix[4]arene derivatives: synthesis and membrane transport of biorelevant species

et al. 2000

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Many new lipophilic α‐aminophosphonates including macrocyclic (on calix[4]arene platform) and chiral ones were synthesized by the Kabachnik‐Fields reaction. Some of them were examined as carriers for membrane transport of biorelevant species such as hydroxy, amino acids, and amino alcohols. Transport measurements showed that these compounds exhibited remarkable efficiency and selectivity of the transport of very hydrophilic substances across lipophilic membranes. The structures of α‐aminophosphonate‐substrate complexes were investigated by spectral and theoretical methods. © 2000 John Wiley & Sons, Inc. Heteroatom Chem 11:518–527, 2000

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“…Suggestions about the structures of low-molecular-weight aminophosphonic acid-metal complexes on the basis of potentiometric measurements, NMR, and IR investigations have been reported by a number of groups [34][35][36][37][38]. Taking these results into consideration, elucidation of the structures of the polymer-metal complexes described in this paper should be possible.…”

Section: Investigations Of the Complex Structurementioning

confidence: 94%

Polymeric aminomethylphosphonic acids - 2. Polychelatogenes for separation of transition metal ions by membrane filtration

Riedelsberger¹,

Jaeger²,

Friedrich³

2000

Designed Monomers and Polymers

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Investigations on the complex formation of monomeric and polymeric aminomethylphosphonic acids with several transition metal ions were carried out. These water-soluble complexes were separated from aqueous solution using an ultrafiltration system. The maximal loading capacities of the polymeric chelatogenes with Cu 2+ , Cd 2+ , Hg 2+ , and Pb 2+ ions were determined at various pH values. Mixed loading studies were carried out to determine the selectivity of these macromolecular chelating agents for metal ions. Compared with known aminoalkylphosphonic acid groups containing polymers, the polyacryloylaminomethylphosphonic acid in particular exhibits good complexation ability for the transition metal ions Cd 2+ and Hg 2+. The acid-base equilibria and complexation behavior of these polychelatogenes were investigated. Acid dissociation constants of the chelating agents and the formation constants of the chelates were determined by means of potentiometric titration. Spectrophotometry was used to determine the dependence of the metal ion/ ligand ratio of the formed complexes on the pH. The structure of the formed complexes was investigated using IR spectroscopy. Proposals for the structures of the complexes were made on the basis of these measurements.

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Organophosphorus Complexones

Cited by 57 publications

References 11 publications

Glyphosate affects photosynthesis in first and second generation of glyphosate-resistant soybeans

Glyphosate affects photosynthesis in first and second generation of glyphosate-resistant soybeans

Lipophilic aminophosphonates and their calix[4]arene derivatives: synthesis and membrane transport of biorelevant species

Polymeric aminomethylphosphonic acids - 2. Polychelatogenes for separation of transition metal ions by membrane filtration

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