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Zhao Y, Guo Q, Xue S, Chen P, Zhao Q, Liu L, Hlushko H, LaVerne J, Pearce CI, Miao A, Wang Z, Rosso KM, Zhang X. Effect of Adsorbed Carboxylates on the Dissolution of Boehmite Nanoplates in Highly Alkaline Solutions. Environ Sci Technol 2024; 58:2017-2026. [PMID: 38214482 DOI: 10.1021/acs.est.3c06595] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2024]
Abstract
Understanding the dissolution of boehmite in highly alkaline solutions is important to processing complex nuclear waste stored at the Hanford (WA) and Savannah River (SC) sites in the United States. Here, we report the adsorption of model carboxylates on boehmite nanoplates in alkaline solutions and their effects on boehmite dissolution in 3 M NaOH at 80 °C. Although expectedly lower than at circumneutral pH, adsorption of oxalate occurred at pH 13, with adsorption decreasing linearly to 3 M NaOH. Classical molecular dynamics simulations suggest that the adsorption of oxalate dianions onto the boehmite surface under high pH can occur through either inner- or outer-sphere complexation mechanisms depending on adsorption sites. However, both adsorption models indicate relatively weak binding, with an energy preference of 1.26 to 2.10 kcal/mol. By preloading boehmite nanoplates with oxalate or acetate, we observed suppression of dissolution rates by 23 or 10%, respectively, compared to pure solids. Scanning electron microscopy and transmission electron microscopy characterizations revealed no detectable difference in the morphologic evolution of the dissolving boehmite materials. We conclude that preadsorbed carboxylates can persist on boehmite surfaces, decreasing the density of dissolution-active sites and thereby adding extrinsic controls on dissolution rates.
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Affiliation(s)
- Yatong Zhao
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, Jiangsu Province 210023, China
- Physical & Computational Science Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Qing Guo
- Department of Chemistry, University of Utah, Salt Lake City, Utah 84112, United States
| | - Sichuang Xue
- Physical & Computational Science Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Ping Chen
- Physical & Computational Science Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Qian Zhao
- Earth and Biological Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Lili Liu
- Physical & Computational Science Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Hanna Hlushko
- Radiation Laboratory, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Jay LaVerne
- Radiation Laboratory and Department of Physics and Astronomy, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Carolyn I Pearce
- Energy & Environment Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Aijun Miao
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, Jiangsu Province 210023, China
| | - Zheming Wang
- Physical & Computational Science Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Kevin M Rosso
- Physical & Computational Science Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Xin Zhang
- Physical & Computational Science Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
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Strik DPBTB, Heusschen B. Microbial Recycling of Polylactic Acid Food Packaging Waste into Carboxylates via Hydrolysis and Mixed-Culture Fermentation. Microorganisms 2023; 11:2103. [PMID: 37630663 PMCID: PMC10458239 DOI: 10.3390/microorganisms11082103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Revised: 08/09/2023] [Accepted: 08/15/2023] [Indexed: 08/27/2023] Open
Abstract
To establish a circular economy, waste streams should be used as a resource to produce valuable products. Biodegradable plastic waste represents a potential feedstock to be microbially recycled via a carboxylate platform. Bioplastics such as polylactic acid food packaging waste (PLA-FPW) are theoretically suitable feedstocks for producing carboxylates. Once feasible, carboxylates such as acetate, n-butyrate, or n-caproate can be used for various applications like lubricants or building blocks for making new bioplastics. In this study, pieces of industrial compostable PLA-FPW material (at 30 or 60 g/L) were added to a watery medium with microbial growth nutrients. This broth was exposed to 70 °C for a pretreatment process to support the hydrolysis of PLA into lactic acid at a maximum rate of 3.0 g/L×d. After 21 days, the broths of the hydrolysis experiments were centrifugated and a part of the supernatant was extracted and prepared for anaerobic fermentation. The mixed microbial culture, originating from a food waste fermentation bioprocess, successfully fermented the hydrolyzed PLA into a spectrum of new C2-C6 multi-carbon carboxylates. n-butyrate was the major product for all fermentations and, on average, 6.5 g/L n-butyrate was obtained from 60 g/L PLA-FPW materials. The wide array of products were likely due to various microbial processes, including lactate conversion into acetate and propionate, as well as lactate-based chain elongation to produce medium-chain carboxylates. The fermentation process did not require pH control. Overall, we showed a proof-of-concept in using real bioplastic waste as feedstock to produce valuable C2-C6 carboxylates via microbial recycling.
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Affiliation(s)
- David P. B. T. B. Strik
- Environmental Technology, Wageningen University & Research, 6708 WG Wageningen, The Netherlands
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Porwal VK, Carof A, Ingrosso F. Hydration effects on the vibrational properties of carboxylates: From continuum models to QM/MM simulations. J Comput Chem 2023. [PMID: 37300426 DOI: 10.1002/jcc.27171] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Revised: 05/15/2023] [Accepted: 05/21/2023] [Indexed: 06/12/2023]
Abstract
The presence of carboxyl groups in a molecule delivers an affinity to metal cations and a sensitivity to the chemical environment, especially for an environment that can give rise to intermolecular hydrogen bonds. Carboxylate groups can also induce intramolecular interactions, such as the formation of hydrogen bonds with donor groups, leading to an impact on the conformational space of biomolecules. In the latter case, the protonation state of the amino groups plays an important role. In order to provide an accurate description of the modifications induced in a carboxylated molecule by the formation of hydrogen bonds, one needs a compromise between a quantum chemical description of the system and the necessity to take into account explicit solvent molecules. In this work, we propose a bottom-up approach to study the conformational space and the carboxylate stretching band of (bio)organic anions. Starting from the anions in a continuum solvent, we then move to calculations using a microsolvation approach including one explicit water molecule per polar group, immersed in a continuum. Finally, we run QM/MM molecular dynamics simulations to analyze the solvation properties and to explore the anions conformational space. The results thus obtained are in good agreement with the description given by the microsolvation approach and they bring a more detailed description of the solvation shell and of the intermolecular hydrogen bonds.
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Affiliation(s)
- Vishal Kumar Porwal
- Université de Lorraine and CNRS, Laboratoire de Physique et Chimie Théoriques UMR 7019, Nancy, France
| | - Antoine Carof
- Université de Lorraine and CNRS, Laboratoire de Physique et Chimie Théoriques UMR 7019, Nancy, France
| | - Francesca Ingrosso
- Université de Lorraine and CNRS, Laboratoire de Physique et Chimie Théoriques UMR 7019, Nancy, France
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Jin Y, de Leeuw KD, Strik DPBTB. Microbial Recycling of Bioplastics via Mixed-Culture Fermentation of Hydrolyzed Polyhydroxyalkanoates into Carboxylates. Materials (Basel) 2023; 16:2693. [PMID: 37048987 PMCID: PMC10096456 DOI: 10.3390/ma16072693] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/29/2023] [Revised: 03/24/2023] [Accepted: 03/25/2023] [Indexed: 06/19/2023]
Abstract
Polyhydroxyalkanoates (PHA) polymers are emerging within biobased biodegradable plastic products. To build a circular economy, effective recycling routes should be established for these and other end-of-life bioplastics. This study presents the first steps of a potential PHA recycling route by fermenting hydrolyzed PHA-based bioplastics (Tianan ENMATTM Y1000P; PHBV (poly(3-hydroxybutyrate-co-3-hydroxyvalerate)) into carboxylates acetate and butyrate. First, three different hydrolysis pretreatment methods under acid, base, and neutral pH conditions were tested. The highest 10% (from 158.8 g COD/L to 16.3 g COD/L) of hydrolysate yield was obtained with the alkaline pretreatment. After filtration to remove the remaining solid materials, 4 g COD/L of the hydrolyzed PHA was used as the substrate with the addition of microbial nutrients for mixed culture fermentation. Due to microbial conversion, 1.71 g/L acetate and 1.20 g/L butyrate were produced. An apparent complete bioconversion from intermediates such as 3-hydroxybutyrate (3-HB) and/or crotonate into carboxylates was found. The overall yields of the combined processes were calculated as 0.07 g acetate/g PHA and 0.049 g butyrate/g PHA. These produced carboxylates can theoretically be used to reproduce PHA or serve many other applications as part of the so-called carboxylate platform.
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Affiliation(s)
- Yong Jin
- Environmental Technology, Wageningen University & Research, 6708 WG Wageningen, The Netherlands; (Y.J.); (K.D.d.L.)
| | - Kasper D. de Leeuw
- Environmental Technology, Wageningen University & Research, 6708 WG Wageningen, The Netherlands; (Y.J.); (K.D.d.L.)
- ChainCraft B.V., 1043 AP Amsterdam, The Netherlands
| | - David P. B. T. B. Strik
- Environmental Technology, Wageningen University & Research, 6708 WG Wageningen, The Netherlands; (Y.J.); (K.D.d.L.)
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Salim M, Chen Y, Solaiman ZM, Siddique KHM. Phosphorus Application Enhances Root Traits, Root Exudation, Phosphorus Use Efficiency, and Seed Yield of Soybean Genotypes. Plants (Basel) 2023; 12:1110. [PMID: 36903971 PMCID: PMC10005312 DOI: 10.3390/plants12051110] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Revised: 02/21/2023] [Accepted: 02/25/2023] [Indexed: 06/18/2023]
Abstract
Phosphorus (P) is a vital macronutrient required for soybean growth and development but is a finite resource in agriculture worldwide. Low inorganic P availability in soil is often a significant constraint for soybean production. However, little is known about the response of P supply on agronomic, root morphology, and physiological mechanisms of contrasting soybean genotypes at various growth stages and the possible effects of different P on soybean yield and yield components. Therefore, we conducted two concurrent experiments using the soil-filled pots with six genotypes (deep-root system: PI 647960, PI 398595, PI 561271, PI 654356; and shallow-root system: PI 595362, PI 597387) and two P levels [0 (P0) and 60 (P60) mg P kg-1 dry soil] and deep PVC columns with two genotypes (PI 561271 and PI 595362) and three P levels [0 (P0), 60 (P60), and 120 (P120) mg P kg-1 dry soil] in a temperature-controlled glasshouse. The genotype × P level interaction showed that increased higher P supply increased leaf area, shoot and root dry weights, total root length, shoot, root, and seed P concentrations and contents, P use efficiency (PUE), root exudation, and seed yield at different growth stages in both experiments. At the vegetative stage (Experiment 1), shallow-rooted genotypes with shorter life cycles had more root dry weight (39%) and total root length (38%) than deep-rooted genotypes with longer life cycles under different P levels. Genotype PI 654356 produced significantly higher (22% more) total carboxylates than PI 647960 and PI 597387 under P60 but not at P0. Total carboxylates positively correlated with root dry weight, total root length, shoot and root P contents, and physiological PUE. The deep-rooted genotypes (PI 398595, PI 647960, PI 654356, and PI 561271) had the highest PUE and root P contents. In Experiment 2, at the flowering stage, genotype PI 561271 had the greatest leaf area (202%), shoot dry weight (113%), root dry weight (143%), and root length (83%) relative to the short-duration, shallow-rooted genotype PI 595362 with external P applied (P60 and P120), with similar trends at maturity. PI 595362 had a greater proportion of carboxylates as malonate (248%), malate (58%), and total carboxylates (82%) than PI 561271 under P60 and P120 but no differences at P0. At maturity, the deep-rooted genotype PI 561271 had greater shoot, root, and seed P contents and PUE than the shallow-rooted genotype PI 595362 under increased P rates but no differences at P0. Further, the genotype PI 561271 had higher shoot (53%), root (165%), and seed yield (47%) than PI 595362 with P60 and P120 than P0. Therefore, inorganic P application enhances plant resistance to the soil P pool and maintains high soybean biomass production and seed yield.
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Affiliation(s)
- Mohammad Salim
- The UWA Institute of Agriculture, and UWA School of Agriculture and Environment, The University of Western Australia, Perth, WA 6009, Australia
- Bangladesh Agricultural Research Institute, Gazipur 1701, Bangladesh
| | - Yinglong Chen
- The UWA Institute of Agriculture, and UWA School of Agriculture and Environment, The University of Western Australia, Perth, WA 6009, Australia
| | - Zakaria M. Solaiman
- The UWA Institute of Agriculture, and UWA School of Agriculture and Environment, The University of Western Australia, Perth, WA 6009, Australia
| | - Kadambot H. M. Siddique
- The UWA Institute of Agriculture, and UWA School of Agriculture and Environment, The University of Western Australia, Perth, WA 6009, Australia
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Abstract
Tremendous progress has been made on molecular aspects of plant phosphorus (P) nutrition, often without heeding information provided by soil scientists, ecophysiologists, and crop physiologists. This review suggests ways to integrate information from different disciplines. When soil P availability is very low, P-mobilizing strategies are more effective than mycorrhizal strategies. Soil parameters largely determine how much P roots can acquire from P-impoverished soil, and kinetic properties of P transporters are less important. Changes in the expression of P transporters avoid P toxicity. Plants vary widely in photosynthetic P-use efficiency, photosynthesis per unit leaf P. The challenge is to discover what the trade-offs are of different patterns of investment in P fractions. Less investment may save P, but are costs incurred? Are these costs acceptable for crops? These questions can be resolved only by the concerted action of scientists working at both molecular and physiological levels, rather than pursuing these problems independently.
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Affiliation(s)
- Hans Lambers
- School of Biological Sciences and Institute of Agriculture, University of Western Australia, Perth, Western Australia, Australia;
- Department of Plant Nutrition, College of Resources and Environmental Sciences, National Academy of Agriculture Green Development, Key Laboratory of Plant-Soil Interactions, Ministry of Education, China Agricultural University, Beijing, China
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Reichert T, Rammig A, Fuchslueger L, Lugli LF, Quesada CA, Fleischer K. Plant phosphorus-use and -acquisition strategies in Amazonia. New Phytol 2022; 234:1126-1143. [PMID: 35060130 DOI: 10.1111/nph.17985] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2021] [Accepted: 12/20/2021] [Indexed: 06/14/2023]
Abstract
In the tropical rainforest of Amazonia, phosphorus (P) is one of the main nutrients controlling forest dynamics, but its effects on the future of the forest biomass carbon (C) storage under elevated atmospheric CO2 concentrations remain uncertain. Soils in vast areas of Amazonia are P-impoverished, and little is known about the variation or plasticity in plant P-use and -acquisition strategies across space and time, hampering the accuracy of projections in vegetation models. Here, we synthesize current knowledge of leaf P resorption, fine-root P foraging, arbuscular mycorrhizal symbioses, and root acid phosphatase and organic acid exudation and discuss how these strategies vary with soil P concentrations and in response to elevated atmospheric CO2 . We identify knowledge gaps and suggest ways forward to fill those gaps. Additionally, we propose a conceptual framework for the variations in plant P-use and -acquisition strategies along soil P gradients of Amazonia. We suggest that in soils with intermediate to high P concentrations, at the plant community level, investments are primarily directed to P foraging strategies via roots and arbuscular mycorrhizas, whereas in soils with intermediate to low P concentrations, investments shift to prioritize leaf P resorption and mining strategies via phosphatases and organic acids.
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Affiliation(s)
- Tatiana Reichert
- School of Life Sciences, Technical University of Munich, Freising, 85354, Germany
| | - Anja Rammig
- School of Life Sciences, Technical University of Munich, Freising, 85354, Germany
| | - Lucia Fuchslueger
- Centre of Microbiology and Environmental Systems Science, University of Vienna, Vienna, 1090, Austria
| | - Laynara F Lugli
- National Institute of Amazonian Research, Manaus, 69060-062, Brazil
| | - Carlos A Quesada
- National Institute of Amazonian Research, Manaus, 69060-062, Brazil
| | - Katrin Fleischer
- School of Life Sciences, Technical University of Munich, Freising, 85354, Germany
- Department Biogeochemical Signals, Max Planck Institute for Biogeochemistry, Jena, 07745, Germany
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Zaguzin AS, Sukhikh TS, Sakhapov IF, Fedin VP, Sokolov MN, Adonin SA. Zn(II) and Co(II) 3D Coordination Polymers Based on 2-Iodoterephtalic Acid and 1,2-bis(4-pyridyl)ethane: Structures and Sorption Properties. Molecules 2022; 27:molecules27041305. [PMID: 35209092 PMCID: PMC8876937 DOI: 10.3390/molecules27041305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Revised: 02/04/2022] [Accepted: 02/06/2022] [Indexed: 11/28/2022]
Abstract
Metal-organic frameworks [M2(2-I-bdc)2bpe] (M = Zn(II) (1), Co(II) (2), 2-I-bdc = 2-iodoterephtalic acid, and bpe = 1,2-bis(4-pyridyl)ethane) were prepared and characterized by X-ray diffractometry. Both compounds retain their 3D structure after the removal of guest DMF molecules. Selectivity of sorption of different organic substrates from the gas phase was investigated for both complexes.
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Affiliation(s)
- Alexander S. Zaguzin
- South Ural State University, Lenina St. 76, 454080 Chelyabinsk, Russia; (A.S.Z.); (I.F.S.)
- Nikolaev Institute of Inorganic Chemistry, SB RAS, Lavrentieva St. 3, 630090 Novosibirsk, Russia; (T.S.S.); (V.P.F.); (M.N.S.)
| | - Taisiya S. Sukhikh
- Nikolaev Institute of Inorganic Chemistry, SB RAS, Lavrentieva St. 3, 630090 Novosibirsk, Russia; (T.S.S.); (V.P.F.); (M.N.S.)
| | - Ilyas F. Sakhapov
- South Ural State University, Lenina St. 76, 454080 Chelyabinsk, Russia; (A.S.Z.); (I.F.S.)
- Arbuzov Institute of Organic and Physical Chemistry, RAS, Arbuzov St. 8, 420088 Kazan, Russia
| | - Vladimir P. Fedin
- Nikolaev Institute of Inorganic Chemistry, SB RAS, Lavrentieva St. 3, 630090 Novosibirsk, Russia; (T.S.S.); (V.P.F.); (M.N.S.)
| | - Maxim N. Sokolov
- Nikolaev Institute of Inorganic Chemistry, SB RAS, Lavrentieva St. 3, 630090 Novosibirsk, Russia; (T.S.S.); (V.P.F.); (M.N.S.)
| | - Sergey A. Adonin
- South Ural State University, Lenina St. 76, 454080 Chelyabinsk, Russia; (A.S.Z.); (I.F.S.)
- Nikolaev Institute of Inorganic Chemistry, SB RAS, Lavrentieva St. 3, 630090 Novosibirsk, Russia; (T.S.S.); (V.P.F.); (M.N.S.)
- Correspondence:
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Zhao X, Wang H, Li B, Zhang W, Li X, Zhao W, Janiak C, Heard AW, Yang XJ, Wu B. A Hydrogen-Bonded Ravel Assembled by Anion Coordination. Angew Chem Int Ed Engl 2021; 61:e202115042. [PMID: 34850515 DOI: 10.1002/anie.202115042] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Indexed: 11/08/2022]
Abstract
Anion-coordination-driven assembly (ACDA) is showing increasing power in the construction of anionic supramolecular architectures. Herein, by expanding the anion centers from oxoanion (phosphate or sulfate) to organic tris-carboxylates, an Archimedean solid (truncated tetrahedron) and a highly entangled, double-walled tetrahedron featuring a ravel topology have been assembled with tris-bis(urea) ligands. The results demonstrate the promising ability of tris-carboxylates as new anion coordination centers in constructing novel topologies with increasing complexity and diversity compared to phosphate or sulfate ions on account of the modifiable size and easy functionalization character of these organic anions.
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Affiliation(s)
- Xiaotong Zhao
- College of Chemistry and Materials Science, Northwest University, Xi'an, 710069, China
| | - Heng Wang
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, 518055, China
| | - Boyang Li
- College of Chemistry and Materials Science, Northwest University, Xi'an, 710069, China
| | - Wenyao Zhang
- College of Chemistry and Materials Science, Northwest University, Xi'an, 710069, China
| | - Xiaopeng Li
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, 518055, China
| | - Wei Zhao
- Key Laboratory of Medical Molecule Science and Pharmaceutics Engineering, Ministry of Industry and Information Technology, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 102488, China
| | - Christoph Janiak
- Institut für Anorganische Chemie und Strukturchemie, Heinrich-Heine-Universität Düsseldorf, 40204, Düsseldorf, Germany
| | - Andrew W Heard
- Department of Chemistry, University of Cambridge, Cambridge, UK
| | - Xiao-Juan Yang
- Key Laboratory of Medical Molecule Science and Pharmaceutics Engineering, Ministry of Industry and Information Technology, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 102488, China
| | - Biao Wu
- College of Chemistry and Materials Science, Northwest University, Xi'an, 710069, China.,Key Laboratory of Medical Molecule Science and Pharmaceutics Engineering, Ministry of Industry and Information Technology, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 102488, China
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Ding W, Cong WF, Lambers H. Response to Zhong and Zhou: P-acquisition strategies and total soil C sequestration. Trends Ecol Evol 2022; 37:14-5. [PMID: 34782148 DOI: 10.1016/j.tree.2021.10.013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Accepted: 10/25/2021] [Indexed: 11/20/2022]
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Zhong H, Zhou J. Response to Ding et al.: Carboxylate exudation promotes C sequestration in dryland ecosystems. Trends Ecol Evol 2021:S0169-5347(21)00281-0. [PMID: 34740444 DOI: 10.1016/j.tree.2021.10.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Revised: 09/30/2021] [Accepted: 10/08/2021] [Indexed: 01/05/2023]
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Niedbała P, Dąbrowa K, Wasiłek S, Jurczak J. Recognition of Chiral Carboxylates by Synthetic Receptors. Molecules 2021; 26:6417. [PMID: 34770825 DOI: 10.3390/molecules26216417] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Revised: 10/19/2021] [Accepted: 10/21/2021] [Indexed: 11/17/2022] Open
Abstract
Recognition of anionic species plays a fundamental role in many essential chemical, biological, and environmental processes. Numerous monographs and review papers on molecular recognition of anions by synthetic receptors reflect the continuing and growing interest in this area of supramolecular chemistry. However, despite the enormous progress made over the last 20 years in the design of these molecules, the design of receptors for chiral anions is much less developed. Chiral recognition is one of the most subtle types of selectivity, and it requires very precise spatial organization of the receptor framework. At the same time, this phenomenon commonly occurs in many processes present in nature, often being their fundamental step. For these reasons, research directed toward understanding the chiral anion recognition phenomenon may lead to the identification of structural patterns that enable increasingly efficient receptor design. In this review, we present the recent progress made in the area of synthetic receptors for biologically relevant chiral carboxylates.
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Contreras-Dávila CA, Esveld J, Buisman CJN, Strik DPBTB. nZVI Impacts Substrate Conversion and Microbiome Composition in Chain Elongation From D- and L-Lactate Substrates. Front Bioeng Biotechnol 2021; 9:666582. [PMID: 34211964 PMCID: PMC8239352 DOI: 10.3389/fbioe.2021.666582] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Accepted: 05/25/2021] [Indexed: 12/12/2022] Open
Abstract
Medium-chain carboxylates (MCC) derived from biomass biorefining are attractive biochemicals to uncouple the production of a wide array of products from the use of non-renewable sources. Biological conversion of biomass-derived lactate during secondary fermentation can be steered to produce a variety of MCC through chain elongation. We explored the effects of zero-valent iron nanoparticles (nZVI) and lactate enantiomers on substrate consumption, product formation and microbiome composition in batch lactate-based chain elongation. In abiotic tests, nZVI supported chemical hydrolysis of lactate oligomers present in concentrated lactic acid. In fermentation experiments, nZVI created favorable conditions for either chain-elongating or propionate-producing microbiomes in a dose-dependent manner. Improved lactate conversion rates and n-caproate production were promoted at 0.5-2 g nZVI⋅L-1 while propionate formation became relevant at ≥ 3.5 g nZVI⋅L-1. Even-chain carboxylates (n-butyrate) were produced when using enantiopure and racemic lactate with lactate conversion rates increased in nZVI presence (1 g⋅L-1). Consumption of hydrogen and carbon dioxide was observed late in the incubations and correlated with acetate formation or substrate conversion to elongated products in the presence of nZVI. Lactate racemization was observed during chain elongation while isomerization to D-lactate was detected during propionate formation. Clostridium luticellarii, Caproiciproducens, and Ruminococcaceae related species were associated with n-valerate and n-caproate production while propionate was likely produced through the acrylate pathway by Clostridium novyi. The enrichment of different potential n-butyrate producers (Clostridium tyrobutyricum, Lachnospiraceae, Oscillibacter, Sedimentibacter) was affected by nZVI presence and concentrations. Possible theories and mechanisms underlying the effects of nZVI on substrate conversion and microbiome composition are discussed. An outlook is provided to integrate (bio)electrochemical systems to recycle (n)ZVI and provide an alternative reducing power agent as durable control method.
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Affiliation(s)
| | - Johan Esveld
- Environmental Technology, Wageningen University & Research, Wageningen, Netherlands
| | - Cees J N Buisman
- Environmental Technology, Wageningen University & Research, Wageningen, Netherlands
| | - David P B T B Strik
- Environmental Technology, Wageningen University & Research, Wageningen, Netherlands
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14
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Ramírez-Chan DE, Frontana C, González FJ. Electrografting of Carbon Surfaces with Aliphatic Chains and its Effect on the Rectification of Ferrocene as Redox Probe in Solution. Chemphyschem 2021; 22:944-951. [PMID: 33792153 DOI: 10.1002/cphc.202100144] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Revised: 03/30/2021] [Indexed: 11/10/2022]
Abstract
The mediated oxidation of acetate and octanoate ions in acetonitrile was used to covalently modify carbon surfaces with films bearing saturated aliphatic chains of different length. Film thickness increases proportionally with the length of the aliphatic chain within the carboxylate precursor. The thickest film was obtained from octanoate oxidation and rectification occurs when ferrocene is used as redox probe in acetonitrile solution. This effect increases with the bulky and hydrophobic nature of the supporting electrolyte cations; n-Hx4 N+ >n-Bu4 N+ >Me4 N+ . The combination of the bulky and hydrophobic properties of the supporting electrolyte ions as well as the hydrophobic properties of the electrografted films is the basis of rectification of ferrocene in cyclic voltammetry experiments. This phenomenon was simulated through a CEC mechanism in solution, where the mass transport inside the film channels was emulated through single chemical equilibria.
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Affiliation(s)
- Daniel E Ramírez-Chan
- Departamento de Química, Centro de Investigación y de Estudios Avanzados del IPN, Av. Instituto Politécnico Nacional 2508, C.P., 07360, Mexico City, Mexico
| | - Carlos Frontana
- Centro de Investigación y Desarrollo Tecnológico en Electroquímica, S.C., Parque Tecnológico Querétaro S/N, Sanfandila, Pedro Escobedo, Querétaro, C.P. 76703, Mexico
| | - Felipe J González
- Departamento de Química, Centro de Investigación y de Estudios Avanzados del IPN, Av. Instituto Politécnico Nacional 2508, C.P., 07360, Mexico City, Mexico
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15
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Tiziani R, Mimmo T, Valentinuzzi F, Pii Y, Celletti S, Cesco S. Corrigendum: Root Handling Affects Carboxylates Exudation and Phosphate Uptake of White Lupin Roots. Front Plant Sci 2021; 12:681263. [PMID: 33968123 PMCID: PMC8101549 DOI: 10.3389/fpls.2021.681263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Accepted: 03/16/2021] [Indexed: 06/12/2023]
Abstract
[This corrects the article DOI: 10.3389/fpls.2020.584568.].
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16
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de Britto Costa P, Staudinger C, Veneklaas EJ, Oliveira RS, Lambers H. Root positioning and trait shifts in Hibbertia racemosa as dependent on its neighbour's nutrient-acquisition strategy. Plant Cell Environ 2021; 44:1257-1267. [PMID: 33386607 DOI: 10.1111/pce.13991] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Revised: 12/22/2020] [Accepted: 12/28/2020] [Indexed: 06/12/2023]
Abstract
Nutrient-poor ecosystems globally exhibit high plant diversity. One mechanism enabling the co-existence of species in such ecosystems is facilitation among plants with contrasting nutrient-acquisition strategies. The ecophysiological processes underlying these interactions remain poorly understood. We hypothesized that root positioning plays a role between sympatric species in nutrient-poor vegetation. We investigated how the growth traits of the focal mycorrhizal non-cluster-rooted Hibbertia racemosa change when grown in proximity of non-mycorrhizal Banksia attenuata, which produces cluster roots that increase nutrient availability, compared with growth with conspecifics. Focal plants were placed in the centre of rhizoboxes, and biomass allocation, root system architecture, specific root length (SRL), and leaf nutrient concentration were assessed. When grown with B. attenuata, focal plants decreased root investment, increased root growth towards B. attenuata, and positioned their roots near B. attenuata cluster roots. SRL was greater, and the degree of localized root investment correlated positively with B. attenuata cluster-root biomass. Total nutrient contents in the focal individuals were greater when grown with B. attenuata. Focal plants directed their root growth towards the putatively facilitating neighbour's cluster roots, modifying root traits and investment. Preferential root positioning and root morphological traits play important roles in positive plant-plant interactions.
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Affiliation(s)
- Patrícia de Britto Costa
- School of Biological Sciences, The University of Western Australia, Perth, Western Australia, Australia
- Programa de Pós Graduação em Biologia Vegetal Institute of Biology, University of Campinas, Campinas, Brazil
| | - Christiana Staudinger
- School of Biological Sciences, The University of Western Australia, Perth, Western Australia, Australia
- Rhizosphere Ecology and Biogeochemistry Group, Institute of Soil Sciences, University of Natural Resources and Life Sciences, Vienna, Austria
| | - Erik J Veneklaas
- School of Biological Sciences, The University of Western Australia, Perth, Western Australia, Australia
| | - Rafael S Oliveira
- School of Biological Sciences, The University of Western Australia, Perth, Western Australia, Australia
- Departamento de Biologia Vegetal, Institute of Biology, University of Campinas, Campinas, Brazil
| | - Hans Lambers
- School of Biological Sciences, The University of Western Australia, Perth, Western Australia, Australia
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17
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Delgado M, Zúñiga-Feest A, Reyes-Díaz M, Barra PJ, Ruiz S, Bertin-Benavides A, Valle S, Pereira M, Lambers H. Ecophysiological Performance of Proteaceae Species From Southern South America Growing on Substrates Derived From Young Volcanic Materials. Front Plant Sci 2021; 12:636056. [PMID: 33679850 PMCID: PMC7933449 DOI: 10.3389/fpls.2021.636056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Accepted: 02/01/2021] [Indexed: 06/12/2023]
Abstract
Southern South American Proteaceae thrive on young volcanic substrates, which are extremely low in plant-available phosphorus (P). Most Proteaceae exhibit a nutrient-acquisition strategy based on the release of carboxylates from specialized roots, named cluster roots (CR). Some Proteaceae colonize young volcanic substrates which has been related to CR functioning. However, physiological functioning of other Proteaceae on recent volcanic substrates is unknown. We conducted an experiment with seedlings of five Proteaceae (Gevuina avellana, Embothrium coccineum, Lomatia hirsuta, L. ferruginea, and L. dentata) grown in three volcanic materials. Two of them are substrates with very low nutrient concentrations, collected from the most recent deposits of the volcanoes Choshuenco and Calbuco (Chile). The other volcanic material corresponds to a developed soil that exhibits a high nutrient availability. We assessed morphological responses (i.e., height, biomass, and CR formation), seed and leaf macronutrient and micronutrient concentrations and carboxylates exuded by roots. The results show that G. avellana was less affected by nutrient availability of the volcanic substrate, probably because it had a greater nutrient content in its seeds and produced large CR exuding carboxylates that supported their initial growth. Embothrium coccineum exhibited greater total plant height and leaf P concentration than Lomatia species. In general, in all species leaf macronutrient concentrations were reduced on nutrient-poor volcanic substrates, while leaf micronutrient concentrations were highly variable depending on species and volcanic material. We conclude that Proteaceae from temperate rainforests differ in their capacity to grow and acquire nutrients from young and nutrient-poor volcanic substrates. The greater seed nutrient content, low nutrient requirements (only for G. avellana) and ability to mobilize nutrients help explain why G. avellana and E. coccineum are better colonizers of recent volcanic substrates than Lomatia species.
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Affiliation(s)
- M. Delgado
- Center of Plant, Soil Interaction and Natural Resources Biotechnology, Scientific and Technological Bioresource Nucleus (BIOREN), Universidad de La Frontera, Temuco, Chile
| | - A. Zúñiga-Feest
- Laboratorio de Biología Vegetal, Instituto de Ciencias Ambientales y Evolutivas, Facultad de Ciencias, Universidad Austral de Chile, Valdivia, Chile
- Centro de Investigación en Suelos Volcánicos (CISVo), Valdivia, Chile
| | - M. Reyes-Díaz
- Center of Plant, Soil Interaction and Natural Resources Biotechnology, Scientific and Technological Bioresource Nucleus (BIOREN), Universidad de La Frontera, Temuco, Chile
- Departamento de Ciencias Químicas y Recursos Naturales, Facultad de Ingeniería y Ciencias, Universidad de La Frontera, Temuco, Chile
| | - P. J. Barra
- Center of Plant, Soil Interaction and Natural Resources Biotechnology, Scientific and Technological Bioresource Nucleus (BIOREN), Universidad de La Frontera, Temuco, Chile
| | - S. Ruiz
- Laboratorio de Biología Vegetal, Instituto de Ciencias Ambientales y Evolutivas, Facultad de Ciencias, Universidad Austral de Chile, Valdivia, Chile
| | - A. Bertin-Benavides
- Laboratorio de Epigenética Vegetal, Departamento de Silvicultura, Facultad de Ciencias Forestales, Universidad de Concepción, Concepción, Chile
| | - S. Valle
- Centro de Investigación en Suelos Volcánicos (CISVo), Valdivia, Chile
- Facultad de Ciencias Agrarias, Instituto de Ingeniería Agraria y Suelos, Universidad Austral de Chile, Valdivia, Chile
| | - M. Pereira
- Laboratorio de Biología Vegetal, Instituto de Ciencias Ambientales y Evolutivas, Facultad de Ciencias, Universidad Austral de Chile, Valdivia, Chile
| | - H. Lambers
- School of Biological Sciences, The University of Western Australia, Perth, WA, Australia
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18
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Moura NS, Bajgiran KR, Roman CL, Daemen L, Cheng Y, Lawrence J, Melvin AT, Dooley KM, Dorman JA. Catalytic Enhancement of Inductively Heated Fe 3 O 4 Nanoparticles by Removal of Surface Ligands. ChemSusChem 2021; 14:1122-1130. [PMID: 33338322 DOI: 10.1002/cssc.202002775] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Indexed: 06/12/2023]
Abstract
Heat management in catalysis is limited by each material's heat transfer efficiencies, resulting in energy losses despite current thermal engineering strategies. In contrast, induction heating of magnetic nanoparticles (NPs) generates heat at the surface of the catalyst where the reaction occurs, reducing waste heat via dissipation. However, the synthesis of magnetic NPs with optimal heat generation requires interfacial ligands, such as oleic acid, which act as heat sinks. Surface treatments using tetramethylammonium hydroxide (TMAOH) or pyridine are used to remove these ligands before applications in hydrophilic media. In this study, Fe3 O4 NPs are surface treated to study the effect of induction heating on the catalytic oxidation of 1-octanol. Whereas TMAOH was unsuccessful in removing oleic acid, pyridine treatment resulted in a roughly 2.5-fold increase in heat generation and product yield. Therefore, efficient surfactant removal has profound implications in induction heating catalysis by increasing the heat transfer and available surface sites.
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Affiliation(s)
- Natalia S Moura
- Department of Chemical Engineering, Louisiana State University, 3307 Patrick F. Taylor Hall, Baton Rouge, LA 70803, USA
| | - Khashayar R Bajgiran
- Department of Chemical Engineering, Louisiana State University, 3307 Patrick F. Taylor Hall, Baton Rouge, LA 70803, USA
| | - Cameron L Roman
- Department of Chemical Engineering, Louisiana State University, 3307 Patrick F. Taylor Hall, Baton Rouge, LA 70803, USA
| | - Luke Daemen
- Spallation Neutron Source, Oak Ridge National Lab, PO. Box 2008, Oak Ridge, TN 37831, USA
| | - Yongqiang Cheng
- Spallation Neutron Source, Oak Ridge National Lab, PO. Box 2008, Oak Ridge, TN 37831, USA
| | - Jimmy Lawrence
- Department of Chemical Engineering, Louisiana State University, 3307 Patrick F. Taylor Hall, Baton Rouge, LA 70803, USA
| | - Adam T Melvin
- Department of Chemical Engineering, Louisiana State University, 3307 Patrick F. Taylor Hall, Baton Rouge, LA 70803, USA
| | - Kerry M Dooley
- Department of Chemical Engineering, Louisiana State University, 3307 Patrick F. Taylor Hall, Baton Rouge, LA 70803, USA
| | - James A Dorman
- Department of Chemical Engineering, Louisiana State University, 3307 Patrick F. Taylor Hall, Baton Rouge, LA 70803, USA
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Mylonas-Margaritis I, Mayans J, McArdle P, Papatriantafyllopoulou C. Zn II and Cu II-Based Coordination Polymers and Metal Organic Frameworks by the of Use of 2-Pyridyl Oximes and 1,3,5-Benzenetricarboxylic Acid. Molecules 2021; 26:491. [PMID: 33477697 PMCID: PMC7831896 DOI: 10.3390/molecules26020491] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Revised: 01/09/2021] [Accepted: 01/12/2021] [Indexed: 11/23/2022] Open
Abstract
The simultaneous use of 2-pyridyl oximes (pyridine-2 amidoxime, H2pyaox; 2-methyl pyridyl ketoxime, Hmpko) and 1,3,5-benzenetricarboxylic acid (H3btc) provided access to five new compounds, namely [Zn(H2btc)2(H2pyaox)2]•2H2O (1•2H2O), [Zn(Hbtc)(H2pyaox)2]n (2), [Cu(Hbtc)(H2pyaox)]n (3), [Cu(Hbtc)(HmpKo)]n (4) and [Cu2(Hbtc)2(Hmpko)2(H2O)2]•4H2O (5•4H2O). Among them, 3 is the first example of a metal-organic framework (MOF) containing H2pyaox. Its framework can be described as a 3-c uninodal net of hcb topology with the layers being parallel to the (1,0,1) plane. Furthermore, 3 is the third reported MOF based on a 2-pyridyl oxime in general. 2 and 4 are new members of a small family of coordination polymers containing an oximic ligand. 1-5 form 3D networks through strong intermolecular interactions. Dc magnetic susceptibility studies were carried out in a crystalline sample of 3 and revealed the presence of weak exchange interactions between the metal centres; the experimental data were fitted to a theoretical model with the fitting parameters being J = -0.16(1) cm-1 and g = 2.085(1). The isotropic g value was also confirmed by electronic paramagnetic resonance (EPR) spectroscopy. Reactivity studies were performed for 3 in the presence of metal ions; the reaction progress was studied and discussed for Fe(NO3)3 by the use of several characterization techniques, including single crystal X-ray crystallography and IR spectroscopy.
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Affiliation(s)
- Ioannis Mylonas-Margaritis
- School of Chemistry, College of Science and Engineering, National University of Ireland Galway, University Road, H91 TK33 Galway, Ireland; (I.M.-M.); (P.M.)
| | - Julia Mayans
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, Catedrático José Beltran 2, 46980 Paterna Valencia, Spain;
| | - Patrick McArdle
- School of Chemistry, College of Science and Engineering, National University of Ireland Galway, University Road, H91 TK33 Galway, Ireland; (I.M.-M.); (P.M.)
| | - Constantina Papatriantafyllopoulou
- School of Chemistry, College of Science and Engineering, National University of Ireland Galway, University Road, H91 TK33 Galway, Ireland; (I.M.-M.); (P.M.)
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20
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Kuerban M, Jiao W, Pang J, Jing J, Qiu LJ, Ding W, Cong WF, Zhang F, Lambers H. Targeting Low-Phytate Soybean Genotypes Without Compromising Desirable Phosphorus-Acquisition Traits. Front Genet 2021; 11:574547. [PMID: 33381147 PMCID: PMC7767974 DOI: 10.3389/fgene.2020.574547] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2020] [Accepted: 11/23/2020] [Indexed: 11/16/2022] Open
Abstract
Phytate-phosphorus (P) in food and feed is not efficiently utilized by humans and non-ruminant livestock, potentially contributing to high losses of P to the environment. Crops with high P-acquisition efficiency can access soil P effectively. It remains elusive whether crop genotypes with high P-acquisition efficiency can also have low seed phytate concentrations. A core collection of 256 soybean [Glycine max (L.) Merr.] genotypes from China with diverse genetic background were grown in the same environment and seeds were sampled to screen for seed phytate-P concentration. Some of these genotypes were also grown in a low-P soil in the glasshouse to measure root morphological and physiological traits related to P acquisition. Large genotypic variation was found in seed phytate-P concentration (0.69–5.49 mg P g–1 dry weight), total root length, root surface area, rhizosheath carboxylates, and acid phosphatase activity in rhizosheath soil. Geographically, seed phytate-P concentration was the highest for the genotypes from Hainan Province, whereas it was the lowest for the genotypes from Inner Mongolia. Seed phytate-P concentration showed no correlation with any desirable root traits associated with enhanced P acquisition. Two genotypes (Siliyuan and Diliuhuangdou-2) with both low phytate concentrations and highly desirable P-acquisition traits were identified. This is the first study to show that some soybean genotypes have extremely low seed phytate concentrations, combined with important root traits for efficient P acquisition, offering material for breeding genotypes with low seed phytate-P concentrations.
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Affiliation(s)
- Mireadili Kuerban
- College of Resources and Environmental Sciences, National Academy of Agriculture Green Development, Key Laboratory of Plant-Soil Interactions, Ministry of Education, China Agricultural University, Beijing, China
| | - Wenfeng Jiao
- College of Resources and Environmental Sciences, National Academy of Agriculture Green Development, Key Laboratory of Plant-Soil Interactions, Ministry of Education, China Agricultural University, Beijing, China
| | - Jiayin Pang
- The UWA Institute of Agriculture, The University of Western Australia, Perth, WA, Australia.,School of Agriculture and Environment, The University of Western Australia, Perth, WA, Australia
| | - Jingying Jing
- College of Grassland Science and Technology, China Agricultural University, Beijing, China
| | - Li-Juan Qiu
- National Key Facility for Gene Resources and Genetic Improvement, Key Laboratory of Crop Germplasm Utilization, Ministry of Agriculture, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Wenli Ding
- College of Resources and Environmental Sciences, National Academy of Agriculture Green Development, Key Laboratory of Plant-Soil Interactions, Ministry of Education, China Agricultural University, Beijing, China
| | - Wen-Feng Cong
- College of Resources and Environmental Sciences, National Academy of Agriculture Green Development, Key Laboratory of Plant-Soil Interactions, Ministry of Education, China Agricultural University, Beijing, China
| | - Fusuo Zhang
- College of Resources and Environmental Sciences, National Academy of Agriculture Green Development, Key Laboratory of Plant-Soil Interactions, Ministry of Education, China Agricultural University, Beijing, China
| | - Hans Lambers
- College of Resources and Environmental Sciences, National Academy of Agriculture Green Development, Key Laboratory of Plant-Soil Interactions, Ministry of Education, China Agricultural University, Beijing, China.,The UWA Institute of Agriculture, The University of Western Australia, Perth, WA, Australia.,School of Biological Sciences, The University of Western Australia, Perth, WA, Australia
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21
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Mylonas-Margaritis I, Gérard A, Skordi K, Mayans J, Tasiopoulos A, McArdle P, Papatriantafyllopoulou C. From 1D Coordination Polymers to Metal Organic Frameworks by the Use of 2-Pyridyl Oximes. Materials (Basel) 2020; 13:E4084. [PMID: 32937938 PMCID: PMC7560365 DOI: 10.3390/ma13184084] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/14/2020] [Revised: 09/03/2020] [Accepted: 09/07/2020] [Indexed: 12/21/2022]
Abstract
The synthesis and characterization of coordination polymers and metal-organic frameworks (MOFs) has attracted a significant interest over the last decades due to their fascinating physical properties, as well as their use in a wide range of technological, environmental, and biomedical applications. The initial use of 2-pyridyl oximic ligands such as pyridine-2 amidoxime (H2pyaox) and 2-methyl pyridyl ketoxime (Hmpko) in combination with 1,2,4,5-benzene tetracarboxylic acid (pyromellitic acid), H4pma, provided access to nine new compounds whose structures and properties are discussed in detail. Among them, [Zn2(pma)(H2pyaox)2(H2O)2]n (3) and [Cu4(OH)2(pma)(mpko)2]n (9) are the first MOFs based on a 2-pyridyl oxime with 9 possessing a novel 3,4,5,8-c net topology. [Zn2(pma)(H2pyaox)2]n (2), [Cu2(pma)(H2pyaox)2(DMF)2]n (6), and [Cu2(pma)(Hmpko)2(DMF)2]n (8) join a small family of coordination polymers containing an oximic ligand. 9 exhibits selectivity for FeIII ions adsorption, as was demonstrated by a variety of techniques including UV-vis, EDX, and magnetism. DC magnetic susceptibility studies in 9 revealed the presence of strong antiferromagnetic interactions between the metal centers, which lead to a diamagnetic ground state; it was also found that the magnetic properties of 9 are affected by the amount of the encapsulated Fe3+ ions, which is a very desirable property for the development of magnetism-based sensors.
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Affiliation(s)
- Ioannis Mylonas-Margaritis
- School of Chemistry, College of Science and Engineering, National University of Ireland Galway, SSPC, Synthesis and Solid State Pharmaceutical Centre, University Road, Galway H91 TK33, Ireland; (I.M.-M.); (A.G.); (P.M.)
| | - Auban Gérard
- School of Chemistry, College of Science and Engineering, National University of Ireland Galway, SSPC, Synthesis and Solid State Pharmaceutical Centre, University Road, Galway H91 TK33, Ireland; (I.M.-M.); (A.G.); (P.M.)
| | - Katerina Skordi
- Department of Chemistry, University of Cyprus, 1678 Nicosia, Cyprus; (K.S.); (A.T.)
| | - Julia Mayans
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, Catedrático José Beltran 2, 46980 Paterna (Valencia), Spain;
| | | | - Patrick McArdle
- School of Chemistry, College of Science and Engineering, National University of Ireland Galway, SSPC, Synthesis and Solid State Pharmaceutical Centre, University Road, Galway H91 TK33, Ireland; (I.M.-M.); (A.G.); (P.M.)
| | - Constantina Papatriantafyllopoulou
- School of Chemistry, College of Science and Engineering, National University of Ireland Galway, SSPC, Synthesis and Solid State Pharmaceutical Centre, University Road, Galway H91 TK33, Ireland; (I.M.-M.); (A.G.); (P.M.)
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Rüütel A, Yrjänä V, Kadam SA, Saar I, Ilisson M, Darnell A, Haav K, Haljasorg T, Toom L, Bobacka J, Leito I. Design, synthesis and application of carbazole macrocycles in anion sensors. Beilstein J Org Chem 2020; 16:1901-1914. [PMID: 32802207 PMCID: PMC7418101 DOI: 10.3762/bjoc.16.157] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Accepted: 07/16/2020] [Indexed: 11/23/2022] Open
Abstract
Carboxylate sensing solid-contact ion-selective electrodes (ISEs) were created to provide a proof-of-concept ISE development process covering all aspects from in silico ionophore design to functional sensor characterization. The biscarbazolylurea moiety was used to synthesize methylene-bridged macrocycles of different ring size aiming to fine tune selectivity towards different carboxylates. Cyclization was achieved with two separate strategies, using either amide synthesis to access up to –[CH2]10– macrocycles or acyl halides to access up to –[CH2]14– macrocycles. Seventy-five receptor–anion complexes were modelled and studied with COSMO-RS, in addition to all free host molecules. In order to predict initial selectivity towards carboxylates, 1H NMR relative titrations were used to quantify binding in DMSO-d6/H2O solvent systems of two proportions – 99.5%:0.5% m/m and 90.0%:10.0% m/m, suggesting initial selectivity towards acetate. Three ionophores were selected for successful sensor prototype development and characterization. The constructed ion-selective electrodes showed higher selectivity towards benzoate than acetate, i.e., the selectivity patterns of the final sensors deviated from that predicted by the classic titration experiments. While the binding constants obtained by NMR titration in DMSO-d6/H2O solvent systems provided important guidance for sensor development, the results obtained in this work emphasize the importance of evaluating the binding behavior of receptors in real sensor membranes.
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Affiliation(s)
- Alo Rüütel
- Institute of Chemistry, University of Tartu, Ravila 14a, 50411 Tartu, Estonia, https://analytical.chem.ut.ee
| | - Ville Yrjänä
- Johan Gadolin Process Chemistry Centre, Laboratory of Molecular Science and Engineering, Åbo Akademi University, Biskopsgatan 8, FI-20500 Turku/Åbo, Finland
| | - Sandip A Kadam
- Institute of Chemistry, University of Tartu, Ravila 14a, 50411 Tartu, Estonia, https://analytical.chem.ut.ee
| | - Indrek Saar
- Institute of Chemistry, University of Tartu, Ravila 14a, 50411 Tartu, Estonia, https://analytical.chem.ut.ee
| | - Mihkel Ilisson
- Institute of Chemistry, University of Tartu, Ravila 14a, 50411 Tartu, Estonia, https://analytical.chem.ut.ee
| | - Astrid Darnell
- Institute of Chemistry, University of Tartu, Ravila 14a, 50411 Tartu, Estonia, https://analytical.chem.ut.ee
| | - Kristjan Haav
- Institute of Chemistry, University of Tartu, Ravila 14a, 50411 Tartu, Estonia, https://analytical.chem.ut.ee
| | - Tõiv Haljasorg
- Institute of Chemistry, University of Tartu, Ravila 14a, 50411 Tartu, Estonia, https://analytical.chem.ut.ee
| | - Lauri Toom
- Institute of Chemistry, University of Tartu, Ravila 14a, 50411 Tartu, Estonia, https://analytical.chem.ut.ee
| | - Johan Bobacka
- Johan Gadolin Process Chemistry Centre, Laboratory of Molecular Science and Engineering, Åbo Akademi University, Biskopsgatan 8, FI-20500 Turku/Åbo, Finland
| | - Ivo Leito
- Institute of Chemistry, University of Tartu, Ravila 14a, 50411 Tartu, Estonia, https://analytical.chem.ut.ee
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Fourati Z, Sauguet L, Delarue M. Structural evidence for the binding of mono carboxylates and dicarboxylates at pharmacologically relevant extracellular sites of a pentameric ligand-gated ion channel. Acta Crystallogr D Struct Biol 2020; 76:668-675. [PMID: 32627739 PMCID: PMC7336382 DOI: 10.1107/s205979832000772x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Accepted: 06/05/2020] [Indexed: 11/21/2022] Open
Abstract
GLIC is a bacterial homologue of the pentameric ligand-gated ion channels (pLGICs) that mediate the fast chemical neurotransmission of nerve signalling in eukaryotes. Because the activation and allosteric modulation features are conserved among prokaryotic and eukaryotic pLGICs, GLIC is commonly used as a model to study the allosteric transition and structural pharmacology of pLGICs. It has previously been shown that GLIC is inhibited by some carboxylic acid derivatives. Here, experimental evidence for carboxylate binding to GLIC is provided by solving its X-ray structures with a series of monocarboxylate and dicarboxylate derivatives, and two carboxylate-binding sites are described: (i) the `intersubunit' site that partially overlaps the canonical pLGIC orthosteric site and (ii) the `intrasubunit' vestibular site, which is only occupied by a subset of the described derivatives. While the intersubunit site is widely conserved in all pLGICs, the intrasubunit site is only conserved in cationic eukaryotic pLGICs. This study sheds light on the importance of these two extracellular modulation sites as potential drug targets in pLGICs.
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Affiliation(s)
- Zaineb Fourati
- Unité Dynamique Structurale des Macromolécules, Institut Pasteur, 25 Rue du Docteur Roux, F-75015 Paris, France
- Centre National de la Recherche Scientifique, CNRS UMR3528, Biologie Structurale des Processus Cellulaires et Maladies Infectieuses, 25 Rue du Docteur Roux, F-75015 Paris, France
| | - Ludovic Sauguet
- Unité Dynamique Structurale des Macromolécules, Institut Pasteur, 25 Rue du Docteur Roux, F-75015 Paris, France
- Centre National de la Recherche Scientifique, CNRS UMR3528, Biologie Structurale des Processus Cellulaires et Maladies Infectieuses, 25 Rue du Docteur Roux, F-75015 Paris, France
| | - Marc Delarue
- Unité Dynamique Structurale des Macromolécules, Institut Pasteur, 25 Rue du Docteur Roux, F-75015 Paris, France
- Centre National de la Recherche Scientifique, CNRS UMR3528, Biologie Structurale des Processus Cellulaires et Maladies Infectieuses, 25 Rue du Docteur Roux, F-75015 Paris, France
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Tiziani R, Mimmo T, Valentinuzzi F, Pii Y, Celletti S, Cesco S. Root Handling Affects Carboxylates Exudation and Phosphate Uptake of White Lupin Roots. Front Plant Sci 2020; 11:584568. [PMID: 33117414 PMCID: PMC7566432 DOI: 10.3389/fpls.2020.584568] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Accepted: 08/25/2020] [Indexed: 05/12/2023]
Abstract
The reliable quantification of root exudation and nutrient uptake is a very challenging task, especially when considering single root segments. Most methods used necessitate root handling e.g. root dissecting/cutting. However, there is a knowledge gap on how much these techniques affect root physiology. Thus, this study aimed at assessing the effect of different root handling techniques on the phosphate (Pi) uptake and carboxylate exudation of white lupin roots. White lupin plants were grown hydroponically in a full and Pi-deficient nutrient solution for 60 days. Phosphate uptake and carboxylate exudation of cluster and non-cluster roots were measured using custom made cells 1, 4, and 8 h after the onset of light. Three different experimental set-ups were used: i) without cutting the root apparatus from the shoots, nor dissecting the root into smaller root sections - named intact plant (IP); ii) separating the roots from the shoots, without dissecting the root into smaller sections - named intact root (IR); iii) separating the roots form the shoots and dissecting the roots in different sections-named dissected roots (DR). The sampling at 8 h led to the most significant alterations of the root Pi uptake induced by the sampling method. Generally, roots were mainly affected by the DR sampling method, indicating that results of studies in which roots are cut/dissected should be interpreted carefully. Additionally, the study revealed that the root tip showed a very high Pi uptake rate, suggesting that the tip could act as a Pi sensor. Citrate, malate and lactate could be detected in juvenile, mature and senescent cluster root exudation. We observed a significant effect of the handling method on carboxylate exudation only at sampling hours 1 and 8, although no clear and distinctive trend could be observed. Results here presented reveal that the root handling as well as the sampling time point can greatly influence root physiology and therefore should not be neglected when interpreting rhizosphere dynamics.
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Affiliation(s)
| | - Tanja Mimmo
- *Correspondence: Raphael Tiziani, ; Tanja Mimmo,
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Zhou T, Wang L, Li S, Gao Y, Du Y, Zhao L, Liu W, Yang W. Interactions Between Light Intensity and Phosphorus Nutrition Affect the P Uptake Capacity of Maize and Soybean Seedling in a Low Light Intensity Area. Front Plant Sci 2019; 10:183. [PMID: 30838016 PMCID: PMC6390497 DOI: 10.3389/fpls.2019.00183] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2018] [Accepted: 02/05/2019] [Indexed: 05/25/2023]
Abstract
To capture more nutrients, root systems of maize (Zea mays L.) and soybean (Glycine max L.) exhibit morphological and physiological plasticity to a localized supply of phosphorus (P). However, the mechanisms of the interaction between light intensity and P affecting root morphological and physiological alterations remain unclear. In the present study, the regulation of P uptake capacity of maize and soybean by light intensity and localized P supply was investigated in a low solar radiation area. The plants were grown under continual and disrupted light conditions with homogeneous and heterogeneous P supply. Light capture of maize and soybean increased under the disrupted light condition. Plant dry weight and P uptake were increased by more light capture, particularly when plants were grown in soil with heterogeneous P supply. Similarly, both localized P supply and disrupted light treatment increased the production of fine roots and specific root length in maize. Both homogeneous P supply and disrupted light treatment increased the malate and citrate exudation in the root of soybean. Across all of the experimental treatments, high root morphological plasticity of maize and root physiological plasticity of soybean were associated with lower P concentrations in leaves and greater sucrose concentrations in roots. It is suggested that the carbon (C), exceeded shoot growth capabilities and was transferred to roots as sucrose, which may serve as both a nutritional signal and a C-substrate for root morphological and physiological changes.
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Affiliation(s)
- Tao Zhou
- College of Agronomy, Sichuan Agricultural University, Chengdu, China
| | - Li Wang
- College of Agronomy, Sichuan Agricultural University, Chengdu, China
| | - Shuxian Li
- College of Agronomy, Sichuan Agricultural University, Chengdu, China
| | - Yang Gao
- College of Agronomy, Sichuan Agricultural University, Chengdu, China
| | - Yongli Du
- College of Agronomy, Sichuan Agricultural University, Chengdu, China
| | - Li Zhao
- Sichuan Coalfield Geological Bureau, Chengdu, China
| | - Weiguo Liu
- College of Agronomy, Sichuan Agricultural University, Chengdu, China
| | - Wenyu Yang
- College of Agronomy, Sichuan Agricultural University, Chengdu, China
- Key Laboratory of Crop Ecophysiology and Farming System in Southwest, Ministry of Agriculture, Chengdu, China
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Uphoff M, Michelitsch GS, Hellwig R, Reuter K, Brune H, Klappenberger F, Barth JV. Assembly of Robust Holmium-Directed 2D Metal-Organic Coordination Complexes and Networks on the Ag(100) Surface. ACS Nano 2018; 12:11552-11560. [PMID: 30296056 DOI: 10.1021/acsnano.8b06704] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
We describe the formation of lanthanide-organic coordination networks and complexes under ultra-high-vacuum conditions on a clean Ag(100) surface. The structures comprise single Ho atoms as coordination centers and 1,4-benzenedicarboxylate (from terephtalic acid, TPA) as molecular linkers. Using low-temperature scanning tunneling microscopy, we find two different chiral phases of surface-supported metal-organic structures incorporating Ho atoms. Density functional theory calculations can explain the structure of both binding motifs and give possible reasons for their varying formation under the respective Ho/TPA ratios, as well as deposition and annealing temperatures. Metal-ligand interactions drive the formation of cloverleaf-shaped mononuclear Ho-TPA4 complexes establishing supramolecular arrays stabilized through hydrogen bonding. A 2D lanthanide-organic reticulation is observed when changing the stoichiometry between the two building blocks. The combined insights from scanning tunneling microscopy and density functional theory reveal the relative stability, charge transfer, and bonding environment of both motifs.
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Affiliation(s)
- Martin Uphoff
- Department of Physics (E20) , Technische Universität München , James-Franck-Straße 1 , 85748 Garching , Germany
| | - Georg S Michelitsch
- Department of Chemistry, Chair of Theoretical Chemistry , Technische Universität München , Lichtenbergstraße 4 , 85748 Garching , Germany
| | - Raphael Hellwig
- Department of Physics (E20) , Technische Universität München , James-Franck-Straße 1 , 85748 Garching , Germany
| | - Karsten Reuter
- Department of Chemistry, Chair of Theoretical Chemistry , Technische Universität München , Lichtenbergstraße 4 , 85748 Garching , Germany
| | - Harald Brune
- Institute of Physics , Ecole Polytechnique Fédérale de Lausanne (EPFL) , Station 3 , 1015 Lausanne , Switzerland
| | - Florian Klappenberger
- Department of Physics (E20) , Technische Universität München , James-Franck-Straße 1 , 85748 Garching , Germany
| | - Johannes V Barth
- Department of Physics (E20) , Technische Universität München , James-Franck-Straße 1 , 85748 Garching , Germany
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Pang J, Bansal R, Zhao H, Bohuon E, Lambers H, Ryan MH, Ranathunge K, Siddique KHM. The carboxylate-releasing phosphorus-mobilizing strategy can be proxied by foliar manganese concentration in a large set of chickpea germplasm under low phosphorus supply. New Phytol 2018; 219:518-529. [PMID: 29756639 DOI: 10.1111/nph.15200] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2018] [Accepted: 03/31/2018] [Indexed: 05/21/2023]
Abstract
Root foraging and root physiology such as exudation of carboxylates into the rhizosphere are important strategies for plant phosphorus (P) acquisition. We used 100 chickpea (Cicer arietinum) genotypes with diverse genetic backgrounds to study the relative roles of root morphology and physiology in P acquisition. Plants were grown in pots in a low-P sterilized river sand supplied with 10 μg P g-1 soil as FePO4 , a poorly soluble form of P. There was a large genotypic variation in root morphology (total root length, root surface area, mean root diameter, specific root length and root hair length), and root physiology (rhizosheath pH, carboxylates and acid phosphatase activity). Shoot P content was correlated with total root length, root surface area and total carboxylates per plant, particularly malonate. A positive correlation was found between mature leaf manganese (Mn) concentration and carboxylate amount in rhizosheath relative to root DW. This is the first study to demonstrate that the mature leaf Mn concentration can be used as an easily measurable proxy for the assessment of belowground carboxylate-releasing processes in a range of chickpea genotypes grown under low-P, and therefore offers an important breeding trait, with potential application in other crops.
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Affiliation(s)
- Jiayin Pang
- The UWA Institute of Agriculture, The University of Western Australia, Perth, WA, 6001, Australia
- UWA School of Agriculture and Environment, The University of Western Australia, Perth, WA, 6001, Australia
| | - Ruchi Bansal
- Division of Germplasm Evaluation, ICAR-National Bureau of Plant Genetic Resources, New Delhi, 110012, India
| | - Hongxia Zhao
- Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, 610041, China
| | - Emilien Bohuon
- Institut Polytechnique UniLaSalle, Beauvais Cedex, 60000, France
- School of Biological Sciences, The University of Western Australia, Perth, WA, 6001, Australia
| | - Hans Lambers
- The UWA Institute of Agriculture, The University of Western Australia, Perth, WA, 6001, Australia
- School of Biological Sciences, The University of Western Australia, Perth, WA, 6001, Australia
| | - Megan H Ryan
- The UWA Institute of Agriculture, The University of Western Australia, Perth, WA, 6001, Australia
- UWA School of Agriculture and Environment, The University of Western Australia, Perth, WA, 6001, Australia
| | - Kosala Ranathunge
- School of Biological Sciences, The University of Western Australia, Perth, WA, 6001, Australia
| | - Kadambot H M Siddique
- The UWA Institute of Agriculture, The University of Western Australia, Perth, WA, 6001, Australia
- UWA School of Agriculture and Environment, The University of Western Australia, Perth, WA, 6001, Australia
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28
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Timco GA, Fernandez A, Kostopoulos AK, Muryn CA, Pritchard RG, Strashnov I, Vitorica-Yrezebal IJ, Whitehead GFS, Winpenny REP. An Extensive Family of Heterometallic Titanium(IV)-Metal(III) Rings with Structure Control through Templates. Angew Chem Int Ed Engl 2017; 56:13629-13632. [PMID: 28884939 DOI: 10.1002/anie.201706679] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2017] [Revised: 09/04/2017] [Indexed: 12/24/2022]
Abstract
A family of heterometallic [Cat][Tix MO(x+1 )(O2 Ct Bu)2x+2 ] rings is reported where Cat=a secondary or tertiary alkyl ammonium ion, x=7, 8 or 9, and M=FeIII , GaIII , CrIII , InIII and AlIII . The structures are regular polygons with eight, nine or ten vertices with each edge bridged by an oxide and two pivalates. The size of the ring formed is controlled by the alkylammonium cation present. In each case a homometallic by-product is found [Cat][Tix O(x+1 )(O2 Ct Bu)2x-1 ].
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Affiliation(s)
- Grigore A Timco
- The School of Chemistry, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK
| | - Antonio Fernandez
- The School of Chemistry, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK
| | - Andreas K Kostopoulos
- The School of Chemistry, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK
| | - Christopher A Muryn
- The School of Chemistry, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK
| | - Robin G Pritchard
- The School of Chemistry, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK
| | - Ilya Strashnov
- The School of Chemistry, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK
| | | | - George F S Whitehead
- The School of Chemistry, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK
| | - Richard E P Winpenny
- The School of Chemistry, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK
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Udoetok IA, Wilson LD, Headley JV. Self-Assembled and Cross-Linked Animal and Plant-Based Polysaccharides: Chitosan-Cellulose Composites and Their Anion Uptake Properties. ACS Appl Mater Interfaces 2016; 8:33197-33209. [PMID: 27802018 DOI: 10.1021/acsami.6b11504] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Self-assembled and cross-linked chitosan/cellulose glutaraldehyde composite materials (CGC) were prepared with enhanced surface area and variable morphology. FTIR, CHN, and 13C solid state NMR studies provided support for the cross-linking reaction between the amine groups of chitosan and glutaraldehyde; whereas, XRD and TGA studies provided evidence of cellulose-chitosan interactions for the composites. SEM, equilibrium swelling, and nitrogen adsorption studies corroborate the enhanced surface area and variable morphology of the cross-linked biopolymers. Equilibrium sorption studies at alkaline conditions with phenolic dyes, along with single component and mixed naphthenates in aqueous solution revealed variable uptake properties with the composites. The Freundlich isotherm model revealed that the composite at the highest levels of cross-linker, CGC3, had the highest sorption affinity (KF; L mmol/g) for phenolphthalein (phth) followed by ortho-nitrophenyl acetic acid (ONPAA) and para-nitrophenol (PNP), as follows: Phth (5.03 × 10-1) > ONPAA (2.28 × 10-1) > PNP (8.49 × 10-2). The Sips isotherm model provided a good description of the sorption profile of single component and naphthenate mixtures. The monolayer uptake capacity (Qm; mg g-1) is given in parentheses: 2-hexyldecanoic acid (S1; 115 mg/g) > 2-naphthoxyacetic acid (S3; 40.5 mg/g) > trans-4-pentylcyclohexylcarboxylic acid (S2; 13.7 mg/g). By comparison, the Qm values for CGC3 with naphthenate mixtures (24.1 and 27.4 mg/g) according to UV spectroscopy and electrospray ionization mass spectrometry (ESI-HRMS). The sorbent materials generally show greater uptake with naphthenates that possess lower vs higher double bond equivalence (DBE) values. Kinetic studies revealed that the sorption of phth adopted behavior described by the pseudo-second order model, while uptake for S3 and naphthenate mixtures adopted pseudo-first order behavior. This study contributes to a greater understanding of the sorption properties of the two types of abundant biopolymers and their composites by illustrating their tunable sorption properties. The key role of hydrophobic interactions for CGC materials was evidenced by the controlled sorptive uptake of carboxylate anions with variable molecular structure.
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Affiliation(s)
- Inimfon A Udoetok
- Department of Chemistry, University of Saskatchewan , 110 Science Place, Saskatoon, Saskatchewan S7N 5C9, Canada
| | - Lee D Wilson
- Department of Chemistry, University of Saskatchewan , 110 Science Place, Saskatoon, Saskatchewan S7N 5C9, Canada
| | - John V Headley
- Water Science and Technology Directorate, Environment and Climate Change Canada , 11 Innovation Boulevard, Saskatoon, Saskatchewan S7N 3H5, Canada
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30
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Savage M, Cheng Y, Easun TL, Eyley JE, Argent SP, Warren MR, Lewis W, Murray C, Tang CC, Frogley MD, Cinque G, Sun J, Rudić S, Murden RT, Benham MJ, Fitch AN, Blake AJ, Ramirez-Cuesta AJ, Yang S, Schröder M. Selective Adsorption of Sulfur Dioxide in a Robust Metal-Organic Framework Material. Adv Mater 2016; 28:8705-8711. [PMID: 27529671 DOI: 10.1002/adma.201602338] [Citation(s) in RCA: 112] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2016] [Revised: 06/03/2016] [Indexed: 06/06/2023]
Abstract
Selective adsorption of SO2 is realized in a porous metal-organic framework material, and in-depth structural and spectroscopic investigations using X-rays, infrared, and neutrons define the underlying interactions that cause SO2 to bind more strongly than CO2 and N2 .
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Affiliation(s)
- Mathew Savage
- School of Chemistry, University of Manchester, Manchester, M13 9PL, UK
| | - Yongqiang Cheng
- The Chemical and Engineering Materials Division (CEMD), Neutron Sciences Directorate, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - Timothy L Easun
- School of Chemistry, Cardiff University, Cardiff, CF10 3XQ, UK
| | - Jennifer E Eyley
- School of Chemistry, University of Manchester, Manchester, M13 9PL, UK
| | - Stephen P Argent
- School of Chemistry, University of Nottingham, University Park, Nottingham, NG7 2RD, UK
| | - Mark R Warren
- Diamond Light Source, Harwell Science Campus, Oxfordshire, OX11 0DE, UK
| | - William Lewis
- School of Chemistry, University of Nottingham, University Park, Nottingham, NG7 2RD, UK
| | - Claire Murray
- Diamond Light Source, Harwell Science Campus, Oxfordshire, OX11 0DE, UK
| | - Chiu C Tang
- Diamond Light Source, Harwell Science Campus, Oxfordshire, OX11 0DE, UK
| | - Mark D Frogley
- Diamond Light Source, Harwell Science Campus, Oxfordshire, OX11 0DE, UK
| | - Gianfelice Cinque
- Diamond Light Source, Harwell Science Campus, Oxfordshire, OX11 0DE, UK
| | - Junliang Sun
- College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
| | - Svemir Rudić
- ISIS Neutron & Muon Source, STFC Rutherford Appleton Laboratory, Chilton, Oxfordshire, OX11 0QX, UK
| | | | | | - Andrew N Fitch
- European Synchrotron Radiation Facility, Grenoble, 38043, France
| | - Alexander J Blake
- School of Chemistry, University of Nottingham, University Park, Nottingham, NG7 2RD, UK
| | - Anibal J Ramirez-Cuesta
- The Chemical and Engineering Materials Division (CEMD), Neutron Sciences Directorate, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - Sihai Yang
- School of Chemistry, University of Manchester, Manchester, M13 9PL, UK.
| | - Martin Schröder
- School of Chemistry, University of Manchester, Manchester, M13 9PL, UK.
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31
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Yildiz BC, Kayan A. Preparation of single-site tin(IV) compounds and their use in the polymerization of ε-caprolactone. Des Monomers Polym 2016; 20:89-96. [PMID: 29491782 PMCID: PMC5812124 DOI: 10.1080/15685551.2016.1231032] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2016] [Accepted: 07/29/2016] [Indexed: 12/05/2022] Open
Abstract
Butyltin(IV) carboxylate compounds were obtained by reactions of butyltrichlorotin(IV) with potassium pivalate, perfluoroheptanoate, methacrylate, 2,6-pyridinedicarboxylate, and phthalate. The synthesized complexes were fully characterized by nuclear magnetic resonance (1H-, 13C-NMR), Fourier transform infrared (FTIR), mass spectroscopies (MS) and elemental analysis. These tin complexes were used as catalysts for the ring opening polymerization of ε-caplolactone and the conversion of monomers to polymers was completed in just 1 h. The structures of polymers were characterized by a combination of spectroscopic techniques (NMR, FTIR, MS), differential scanning calorimeter (DSC) and gel permeation chromatography. In this study, the ε-caplolactone polymers with different average molecular weights between 5000 and 40,000 Da having a regular structure were obtained.
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Affiliation(s)
| | - Asgar Kayan
- Department of Chemistry, Kocaeli University, Kocaeli, Turkey
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32
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Lambers H, Hayes PE, Laliberté E, Oliveira RS, Turner BL. Leaf manganese accumulation and phosphorus-acquisition efficiency. Trends Plant Sci 2015; 20:83-90. [PMID: 25466977 DOI: 10.1016/j.tplants.2014.10.007] [Citation(s) in RCA: 110] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2014] [Revised: 10/13/2014] [Accepted: 10/20/2014] [Indexed: 05/18/2023]
Abstract
Plants that deploy a phosphorus (P)-mobilising strategy based on the release of carboxylates tend to have high leaf manganese concentrations ([Mn]). This occurs because the carboxylates mobilise not only soil inorganic and organic P, but also a range of micronutrients, including Mn. Concentrations of most other micronutrients increase to a small extent, but Mn accumulates to significant levels, even when plants grow in soil with low concentrations of exchangeable Mn availability. Here, we propose that leaf [Mn] can be used to select for genotypes that are more efficient at acquiring P when soil P availability is low. Likewise, leaf [Mn] can be used to screen for belowground functional traits related to nutrient-acquisition strategies among species in low-P habitats.
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Affiliation(s)
- Hans Lambers
- School of Plant Biology, The University of Western Australia, Stirling Highway, Crawley (Perth), WA 6009, Australia.
| | - Patrick E Hayes
- School of Plant Biology, The University of Western Australia, Stirling Highway, Crawley (Perth), WA 6009, Australia
| | - Etienne Laliberté
- School of Plant Biology, The University of Western Australia, Stirling Highway, Crawley (Perth), WA 6009, Australia
| | - Rafael S Oliveira
- School of Plant Biology, The University of Western Australia, Stirling Highway, Crawley (Perth), WA 6009, Australia; Departamento de Biologia Vegetal, Universidade Estadual de Campinas, Rua Monteiro Lobato 255, Campinas 13083-862, Brazil
| | - Benjamin L Turner
- Smithsonian Tropical Research Institute, Apartado 0843-03092, Balboa, Ancon, Republic of Panama; School of Plant Biology, The University of Western Australia, Stirling Highway, Crawley (Perth), WA 6009, Australia
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Zhang M, Guo X, Ma W, Ade H, Hou J. A polythiophene derivative with superior properties for practical application in polymer solar cells. Adv Mater 2014; 26:5880-5885. [PMID: 25044098 DOI: 10.1002/adma.201401494] [Citation(s) in RCA: 85] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2014] [Revised: 06/02/2014] [Indexed: 06/03/2023]
Abstract
A polythiophene derivative called PDCBT, which has a backbone of thiophene units and just carboxylate functional groups to modulate its properties, exhibits properties superior to those of poly(3-hexylthiophene), the classic polythiophene derivative, when used as an electron donor in polymer solar cells (PSCs). The best device, based on PDCBT/PC71BM (1:1), develops a good power conversion efficiency of 7.2%.
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Affiliation(s)
- Maojie Zhang
- State Key Laboratory of Polymer, Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
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Bellini M, Bevilacqua M, Filippi J, Lavacchi A, Marchionni A, Miller HA, Oberhauser W, Vizza F, Annen SP, Grützmacher H. Energy and chemicals from the selective electrooxidation of renewable diols by organometallic fuel cells. ChemSusChem 2014; 7:2432-2435. [PMID: 25082272 DOI: 10.1002/cssc.201402316] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2014] [Indexed: 06/03/2023]
Abstract
Organometallic fuel cells catalyze the selective electrooxidation of renewable diols, simultaneously providing high power densities and chemicals of industrial importance. It is shown that the unique organometallic complex [Rh(OTf)(trop2NH)(PPh3)] employed as molecular active site in an anode of an OMFC selectively oxidizes a number of renewable diols, such as ethylene glycol , 1,2-propanediol (1,2-P), 1,3-propanediol (1,3-P), and 1,4-butanediol (1,4-B) to their corresponding mono-carboxylates. The electrochemical performance of this molecular catalyst is discussed, with the aim to achieve cogeneration of electricity and valuable chemicals in a highly selective electrooxidation from diol precursors.
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Affiliation(s)
- Marco Bellini
- Institute of Chemistry of Organometallic Compounds, ICCOM-CNR, Polo Scientifico Area CNR, Via Madonna del Piano 10, 50019 Sesto Fiorentino (Italy)
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Wei SC, Pan M, Li K, Wang S, Zhang J, Su CY. A multistimuli-responsive photochromic metal-organic gel. Adv Mater 2014; 26:2072-2077. [PMID: 24339174 DOI: 10.1002/adma.201304404] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2013] [Revised: 11/04/2013] [Indexed: 06/03/2023]
Abstract
A photochromic metal-organic gel with thermo-, photo-, and anion-responsive behavior is obtained. Unusually, heating of the Al-ligand solution leads to gel formation and cooling to room temperature reverses the process to reform the solution. The gel is sensitive to weakly coordinating anions. Additionally, reversible photochromic transformations take place both in the solution and gel states, accompanied by reversibly switched luminescence.
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Affiliation(s)
- Shi-Chao Wei
- MOE Laboratory of Bioinorganic and Synthetic Chemistry, State Key Laboratory of Optoelectronic Materials and Technologies, Lehn Institute of Functional Materials, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou, 510275, China
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Kariman K, Barker SJ, Jost R, Finnegan PM, Tibbett M. A novel plant-fungus symbiosis benefits the host without forming mycorrhizal structures. New Phytol 2014; 201:1413-1422. [PMID: 24279681 DOI: 10.1111/nph.12600] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2013] [Accepted: 10/09/2013] [Indexed: 05/10/2023]
Abstract
• Most terrestrial plants form mutually beneficial symbioses with specific soil-borne fungi known as mycorrhiza. In a typical mycorrhizal association, fungal hyphae colonize plant roots, explore the soil beyond the rhizosphere and provide host plants with nutrients that might be chemically or physically inaccessible to root systems. • Here, we combined nutritional, radioisotopic ((33)P) and genetic approaches to describe a plant growth promoting symbiosis between the basidiomycete fungus Austroboletus occidentalis and jarrah (Eucalyptus marginata), which has quite different characteristics. • We show that the fungal partner does not colonize plant roots; hyphae are localized to the rhizosphere soil and vicinity and consequently do not transfer nutrients located beyond the rhizosphere. Transcript profiling of two high-affinity phosphate (Pi) transporter genes (EmPHT1;1 and EmPHT1;2) and hyphal-mediated (33)Pi uptake suggest that the Pi uptake shifts from an epidermal to a hyphal pathway in ectomycorrhizal plants (Scleroderma sp.), similar to arbuscular mycorrhizal symbioses, whereas A. occidentalis benefits its host indirectly. The enhanced rhizosphere carboxylates are linked to growth and nutritional benefits in the novel symbiosis. • This work is a starting point for detailed mechanistic studies on other basidiomycete-woody plant relationships, where a continuum between heterotrophic rhizosphere fungi and plant beneficial symbioses is likely to exist.
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Affiliation(s)
- Khalil Kariman
- School of Earth and Environment M087, The University of Western Australia, Crawley, WA, 6009, Australia
- School of Plant Biology M084, The University of Western Australia, Crawley, WA, 6009, Australia
| | - Susan J Barker
- School of Plant Biology M084, The University of Western Australia, Crawley, WA, 6009, Australia
- Institute of Agriculture M082, The University of Western Australia, Crawley, WA, 6009, Australia
| | - Ricarda Jost
- School of Plant Biology M084, The University of Western Australia, Crawley, WA, 6009, Australia
| | - Patrick M Finnegan
- School of Plant Biology M084, The University of Western Australia, Crawley, WA, 6009, Australia
- Institute of Agriculture M082, The University of Western Australia, Crawley, WA, 6009, Australia
| | - Mark Tibbett
- School of Earth and Environment M087, The University of Western Australia, Crawley, WA, 6009, Australia
- Department of Environmental Science and Technology (B37), School of Applied Sciences, Cranfield University, Cranfield, Bedfordshire, MK 43 OAL, UK
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Mukherjee S, Mukherjee PS. Role of dicarboxylate linkers in Mn(III)-salicylaldoximate based extended structures: synthesis, structures, and magnetic behavior. Chemistry 2013; 19:17064-74. [PMID: 24307365 DOI: 10.1002/chem.201302377] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2013] [Indexed: 11/07/2022]
Abstract
Four new oxo-centered Mn(III)-salicylaldoximate triangle-based extended complexes [Mn(III)6O2(salox)6(EtOH)4(phda)]n·(saloxH2)n·(2H2O)n (1), [Mn(III)6O2(salox)6(MeOH)5(5-I-isoph)]n·(3MeOH)n (2), [Mn(III)6O2(salox)6(MeOH)4(H2O) (5-N3-isoph)]n·(4MeOH)n (3) and [Mn(III)3NaO(salox)3(MeOH)4(5-NO2-isoph)]n·(MeOH)n (H2O)n (4) [salox=salicylaldoximate, phda=1,3-phenylenediacetate, isoph=isophthalate] have been synthesized under similar reaction conditions. Single crystal X-ray structures show that in 1, only one type of Mn6 cluster is arranged in 1D, whereas in 2 and 3 there are two types of clusters, differing in the way the triangle units are joined and assembled. In complex 4, however, the basic building structure is heteronuclear and based on Mn3 units extended in 2D. Susceptibility measurements (dc and ac) over a wide range of temperatures and fields show that the complexes 1, 2, and 3 behave as single molecule magnets (SMMs) with S=4 ground state, while 4 is dominantly antiferromagnetic with a ground spin state S=2. Density functional theory calculations have been performed on model complexes to provide a qualitative theoretical interpretation for their overall magnetic behavior.
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Affiliation(s)
- Sandip Mukherjee
- Department of Inorganic & Physical Chemistry, Indian Institution of Science, Bangalore 560 012 (India), Fax: (+91) 8023601552
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Abstract
Although extensively studied, protein-protein interactions remain highly elusive and are of increasing interest in drug development. We show the assembly of a monoclonal antibody, using multivalent carboxylate ions, into highly-ordered structures. While the presence and function of similar structures in vivo are not known, the results may present a possible unexplored area of antibody structure-function relationships. Using a variety of tools (e.g., mechanical rheology, electron microscopy, isothermal calorimetry, Fourier transform infrared spectroscopy), we characterized the physical, biochemical, and thermodynamic properties of these structures and found that citrate may interact directly with the amino acid residue histidine, after which the individual protein units assemble into a filamentous network gel exhibiting high elasticity and interfilament interactions. Citrate interacts exothermically with the monoclonal antibody with an association constant that is highly dependent on solution pH and temperature. Secondary structure analysis also reveals involvement of hydrophobic and aromatic residues.
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Affiliation(s)
- Osigwe Esue
- Pharmaceutical Development, Genentech, South San Francisco, CA, USA.
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Suriyagoda LDB, Ryan MH, Renton M, Lambers H. Adaptive shoot and root responses collectively enhance growth at optimum temperature and limited phosphorus supply of three herbaceous legume species. Ann Bot 2012; 110:959-68. [PMID: 22847657 PMCID: PMC3448422 DOI: 10.1093/aob/mcs166] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2011] [Accepted: 05/28/2012] [Indexed: 05/11/2023]
Abstract
BACKGROUND AND AIMS Studies on the effects of sub- and/or supraoptimal temperatures on growth and phosphorus (P) nutrition of perennial herbaceous species at growth-limiting P availability are few, and the impacts of temperature on rhizosphere carboxylate dynamics are not known for any species. METHODS The effect of three day/night temperature regimes (low, 20/13 °C; medium, 27/20 °C; and high, 32/25 °C) on growth and P nutrition of Cullen cinereum, Kennedia nigricans and Lotus australis was determined. KEY RESULTS The highest temperature was optimal for growth of C. cinereum, while the lowest temperature was optimal for K. nigricans and L. australis. At optimum temperatures, the relative growth rate (RGR), root length, root length per leaf area, total P content, P productivity and water-use efficiency were higher for all species, and rhizosphere carboxylate content was higher for K. nigricans and L. australis. Cullen cinereum, with a slower RGR, had long (higher root length per leaf area) and thin roots to enhance P uptake by exploring a greater volume of soil at its optimum temperature, while K. nigricans and L. australis, with faster RGRs, had only long roots (higher root length per leaf area) as a morphological adaptation, but had a higher content of carboxylates in their rhizospheres at the optimum temperature. Irrespective of the species, the amount of P taken up by a plant was mainly determined by root length, rather than by P uptake rate per unit root surface area. Phosphorus productivity was correlated with RGR and plant biomass. CONCLUSIONS All three species exhibited adaptive shoot and root traits to enhance growth at their optimum temperatures at growth-limiting P supply. The species with a slower RGR (i.e. C. cinereum) showed only morphological root adaptations, while K. nigricans and L. australis, with faster RGRs, had both morphological and physiological (i.e. root carboxylate dynamics) root adaptations.
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Affiliation(s)
- Lalith D B Suriyagoda
- School of Plant Biology and Institute of Agriculture, The University of Western Australia, Crawley WA, Australia.
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Lambers H, Bishop JG, Hopper SD, Laliberté E, Zúñiga-Feest A. Phosphorus-mobilization ecosystem engineering: the roles of cluster roots and carboxylate exudation in young P-limited ecosystems. Ann Bot 2012; 110:329-48. [PMID: 22700940 PMCID: PMC3394658 DOI: 10.1093/aob/mcs130] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2012] [Accepted: 05/17/2012] [Indexed: 05/20/2023]
Abstract
BACKGROUND Carboxylate-releasing cluster roots of Proteaceae play a key role in acquiring phosphorus (P) from ancient nutrient-impoverished soils in Australia. However, cluster roots are also found in Proteaceae on young, P-rich soils in Chile where they allow P acquisition from soils that strongly sorb P. SCOPE Unlike Proteaceae in Australia that tend to proficiently remobilize P from senescent leaves, Chilean Proteaceae produce leaf litter rich in P. Consequently, they may act as ecosystem engineers, providing P for plants without specialized roots to access sorbed P. We propose a similar ecosystem-engineering role for species that release large amounts of carboxylates in other relatively young, strongly P-sorbing substrates, e.g. young acidic volcanic deposits and calcareous dunes. Many of these species also fix atmospheric nitrogen and release nutrient-rich litter, but their role as ecosystem engineers is commonly ascribed only to their diazotrophic nature. CONCLUSIONS We propose that the P-mobilizing capacity of Proteaceae on young soils, which contain an abundance of P, but where P is poorly available, in combination with inefficient nutrient remobilization from senescing leaves allows these species to function as ecosystem engineers. We suggest that diazotrophic species that colonize young soils with strong P-sorption potential should be considered for their positive effect on P availability, as well as their widely accepted role in nitrogen fixation. Their P-mobilizing activity possibly also enhances their nitrogen-fixing capacity. These diazotrophic species may therefore facilitate the establishment and growth of species with less-efficient P-uptake strategies on more-developed soils with low P availability through similar mechanisms. We argue that the significance of cluster roots and high carboxylate exudation in the development of young ecosystems is probably far more important than has been envisaged thus far.
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Affiliation(s)
- Hans Lambers
- School of Plant Biology, University of Western Australia, Crawley, WA 6009, Australia.
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Demadis KD, Raptis RG, Baran P. Chemistry of organophosphonate scale growth lnhibitors: 2. structural aspects of 2-phosphonobutane-1,2,4-tricarboxylic acid monohydrate (PBTC.H2O). Bioinorg Chem Appl 2005;:119-34. [PMID: 18365094 DOI: 10.1155/BCA.2005.119] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
Industrial water systems often suffer from undesirable inorganic deposits, such as calcium carbonate,
calcium phosphate(s), magnesium silicate, and others. Synthetic water additives such as phosphonates and
phosphonocarboxylates are the most important and widely utilized scale inhibitors in a plethora of industrial
applications. The design of efficient and cost-effective inhibitors, as well as the study of their structure and
function at the molecular level are important areas of research. This study reports the crystal and molecular
structure of PBTC (PBTC = 2-phosphonobutane-1,2,4-tricarboxylic acid), one of the most widely used scale
inhibitors in the cooling water treatment industry. Triclinic PBTC monohydrate crystallizes in the P 1 space
group with cell dimesions, a =7.671(1) Å, b = 8.680(1) Å, c = 9.886(1) Å, α = 65.518(2) deg, β = 71.683(2)
deg, γ = 76.173(2) deg, V = 564.20(11) Å3, and Z = 2. Bond distances in the -PO3 moiety are 1.4928(10) Å
for the P=O double bond and 1.5294(10) Å and 1.5578(10) Å for the two -P-O(H) groups. P-C and C-O
bond lengths fall in the normal range. A network of hydrogen bonds are formed between the water molecule
of crystallization, the -P-OH and the -COOH groups.
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Demadis KD, Lykoudis P. Chemistry of organophosphonate scale growth lnhibitors: 3. physicochemical aspects of 2-phosphonobutane-1,2,4-tricarboxylate (PBTC) and its effect on CaCO3 crystal growth. Bioinorg Chem Appl 2005;:135-49. [PMID: 18365095 DOI: 10.1155/BCA.2005.135] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Industrial water systems often suffer from undesirable inorganic deposits, such as calcium carbonate,
calcium phosphates, calcium sulfate, magnesium silicate, and others. Synthetic water additives, such as
phosphonates and phosphonocarboxylates, are the most important and widely utilized scale inhibitors in a plethora of industrial applications including cooling water, geothermal drilling, desalination, etc. The design
of efficient and cost-effective inhibitors, as well as the study of their structure and function at the molecular
level are important areas of research. This study reports various physicochemical aspects of the chemistry of
PBTC (PBTC = 2-phosphonobutane-1,2,4-tricarboxylic acid), one of the most widely used scale inhibitors in
the cooling water treatment industry. These aspects include its CaCO3 crystal growth inhibition and
modification properties under severe conditions of high CaCO3 supersaturation, stability towards oxidizing
microbiocides and tolerance towards precipitation with Ca2+. Results show that 15 ppm of PBTC can inhibit
the formation of by ∼35 %, 30 ppm by ∼40 %, and 60 ppm by ∼44 %. PBTC is virtually stable to the effects
of a variety of oxidizing microbiocides, including chlorine, bromine and others. PBTC shows excellent
tolerance towards precipitation as its Ca salt. Precipitation in a 1000 ppm Ca2+ (as CaCO3) occurs after 185
ppm PBTC are present.
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Suriyagoda LDB, Ryan MH, Renton M, Lambers H. Multiple adaptive responses of Australian native perennial legumes with pasture potential to grow in phosphorus- and moisture-limited environments. Ann Bot 2010; 105:755-67. [PMID: 20421234 PMCID: PMC2859915 DOI: 10.1093/aob/mcq040] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2009] [Revised: 01/13/2010] [Accepted: 01/29/2010] [Indexed: 05/20/2023]
Abstract
BACKGROUND AND AIMS Many Australian legumes have evolved in low-phosphorus (P) soils and low-rainfall areas. Therefore a study was made of the interaction of soil [P] and water availability on growth, photosynthesis, water-use efficiency (WUE) and P nutrition of two Australian native legumes with pasture potential, Cullen australasicum and C. pallidum, and the widely grown exotic pasture legume, lucerne (Medicago sativa). METHODS Plants were grown in a glasshouse at 3, 10 and 30 mg P kg(-1) dry soil for 5 months. At week 10, two drought treatments were imposed, total pot dried (all-dry) and only top soil dried (top-dry), while control pots were maintained at field capacity. KEY RESULTS Shoot dry weight produced by lucerne was never higher than that of C. australasicum. For C. pallidum only, shoot dry weight was reduced at 30 mg P kg(-1) dry soil. The small root system of the Cullen species was quite plastic, allowing plants to access P and moisture efficiently. Lucerne always had a higher proportion of its large root system in the top soil layer compared with Cullen species. All species showed decreased photosynthesis, leaf water potential and stomatal conductance when exposed to drought, but the reductions were less for Cullen species, due to tighter stomatal control, and consequently they achieved a higher WUE. All species showed highest rhizosphere carboxylate concentrations in the all-dry treatment. For lucerne only, carboxylates decreased as P supply increased. Citrate was the main carboxylate in the control and top-dry treatments, and malate in the all-dry treatment. CONCLUSIONS Multiple adaptive responses of Cullen species and lucerne favoured exploitation of low-P soils under drought. The performance of undomesticated Cullen species, relative to that of lucerne, shows their promise as pasture species for environments such as in south-western Australia where water and P are limiting, especially in view of a predicted drying and warming climate.
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Affiliation(s)
- Lalith D B Suriyagoda
- School of Plant Biology, The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia.
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Lambers H, Shane MW, Cramer MD, Pearse SJ, Veneklaas EJ. Root structure and functioning for efficient acquisition of phosphorus: Matching morphological and physiological traits. Ann Bot 2006; 98:693-713. [PMID: 16769731 PMCID: PMC2806175 DOI: 10.1093/aob/mcl114] [Citation(s) in RCA: 398] [Impact Index Per Article: 22.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2006] [Revised: 03/14/2006] [Accepted: 03/27/2006] [Indexed: 05/10/2023]
Abstract
BACKGROUND Global phosphorus (P) reserves are being depleted, with half-depletion predicted to occur between 2040 and 2060. Most of the P applied in fertilizers may be sorbed by soil, and not be available for plants lacking specific adaptations. On the severely P-impoverished soils of south-western Australia and the Cape region in South Africa, non-mycorrhizal species exhibit highly effective adaptations to acquire P. A wide range of these non-mycorrhizal species, belonging to two monocotyledonous and eight dicotyledonous families, produce root clusters. Non-mycorrhizal species with root clusters appear to be particularly effective at accessing P when its availability is extremely low. SCOPE There is a need to develop crops that are highly effective at acquiring inorganic P (Pi) from P-sorbing soils. Traits such as those found in non-mycorrhizal root-cluster-bearing species in Australia, South Africa and other P-impoverished environments are highly desirable for future crops. Root clusters combine a specialized structure with a specialized metabolism. Native species with such traits could be domesticated or crossed with existing crop species. An alternative approach would be to develop future crops with root clusters based on knowledge of the genes involved in development and functioning of root clusters. CONCLUSIONS Root clusters offer enormous potential for future research of both a fundamental and a strategic nature. New discoveries of the development and functioning of root clusters in both monocotyledonous and dicotyledonous families are essential to produce new crops with superior P-acquisition traits.
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Affiliation(s)
- Hans Lambers
- School of Plant Biology, Faculty of Natural and Agricultural Sciences, The University of Western Australia, 35 Stirling Highway, WA 6009, Australia.
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Wouterlood M, Cawthray GR, Scanlon TT, Lambers H, Veneklaas EJ. Carboxylate concentrations in the rhizosphere of lateral roots of chickpea (Cicer arietinum) increase during plant development, but are not correlated with phosphorus status of soil or plants. New Phytol 2004; 162:745-753. [PMID: 33873771 DOI: 10.1111/j.1469-8137.2004.01070.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
• The influence of soil P level and plant development on carboxylate concentrations in the rhizosphere of lateral roots of chickpea (Cicer arietinum) cultivars Heera and Tyson were studied to investigate the relationship between carboxylate exudation and P acquisition by chickpea. • Two chickpea cultivars were grown in soil supplied with 0-100 µg P g-1 . Plants were harvested four times during plant development. In two other experiments, carboxylate concentrations were measured along root sections, using plants grown in soil or in hydroponics. • Carboxylate concentrations in the rhizosphere of lateral roots steadily increased with plant development for cv. Heera, but not for Tyson. Carboxylate concentrations increased with increasing distance from the root apex in soil. This increase might be due to accumulation, because an experiment with plants in hydroponics showed that older segments released at least as much carboxylates as younger segments. • Carboxylate concentrations in the rhizosphere of chickpea appear to be developmentally controlled. Unlike some other plant species, there is no simple correlation with plant or soil P status.
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Affiliation(s)
- Madeleine Wouterlood
- School of Plant Biology, The University of Western Australia, 35 Stirling Highway, Crawley WA 6009, Australia
| | - Gregory R Cawthray
- School of Plant Biology, The University of Western Australia, 35 Stirling Highway, Crawley WA 6009, Australia
| | - Timothy T Scanlon
- School of Plant Biology, The University of Western Australia, 35 Stirling Highway, Crawley WA 6009, Australia
| | - Hans Lambers
- School of Plant Biology, The University of Western Australia, 35 Stirling Highway, Crawley WA 6009, Australia
| | - Erik J Veneklaas
- School of Plant Biology, The University of Western Australia, 35 Stirling Highway, Crawley WA 6009, Australia
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